NY/T 5163-2002 Technical specification for breeding of swimming crab (Portunus trituberculatus) as pollution-free food
Some standard content:
ICS65.150
Agricultural Industry Standard of the People's Republic of China
NY/T5163-2002
Pollution-free food
2002-07-25 Issued
Technical Specification for Swimming Crab Culture
2002-09-01 Implementation
Issued by the Ministry of Agriculture of the People's Republic of China
Appendix A of this standard is a normative appendix.
This standard is proposed by the Ministry of Agriculture of the People's Republic of China. Foreword
NY/T5163--2002
This standard is under the jurisdiction of the National Technical Committee for Aquatic Products Standardization. The drafting units of this standard are: Zhejiang Provincial Aquatic Products Technology Extension Station, Zhejiang Provincial Marine Fisheries Research Institute, Zhoushan Putuo District Aquatic Products Technology Extension Station, and Ningbo Xiangshan County Aquatic Products Technology Extension Station. The main drafters of this standard are: He Zhongyang, Ding Xueyan, Sun Zhong, Xu Guohui, Zheng Yuefu, Du Jianming. Dong
1 Scope
Technical Specifications for the Aquaculture of Swimming Crabs of Three-Turtled Habitat for Pollution-Free Food NY/T5163--2002
This standard specifies the techniques for breeding broodstock, seedlings and artificial breeding of swimming crabs of three-tubertled habitatatus (Pertunus tritubercutatus Miers) for pollution-free aquaculture.
This standard is applicable to the breeding of pollution-free seedlings and ponds for swimming crabs of three-tubertled habitatus, and other aquaculture methods can also be implemented as a reference. 2 Normative References
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions are applicable to this standard. GB-11607 Fishery Water Quality Standard
GB13078
Feed Hygiene Standard
NY5052
NY5071
NY5072
3 Parent Crab Cultivation
Pollution-free Food Water Quality for Seawater Cultivation
Guidelines for the Use of Fishery Drugs
Pollution-free Food
Pollution-free Food Safety Limits for Fishery Compound Feed3.1 Cultivation Pond Conditions
An indoor cement pond is preferred, with two-thirds of the pond bottom covered with sand 10cm~15cm and a water depth of more than 0.8m. The water supply and drainage, temperature control, aeration and light control facilities are complete.
3.2 Water Quality Conditions
The quality of seawater sources meets the requirements of GB11607, and the quality of cultivation water meets the requirements of NY5052. The water used must be treated by sedimentation and filtration, with a salinity of 22~32.
3.3 Quality requirements
Choose female crabs that are healthy and lively in the natural sea area, with intact limbs and no external injuries, and weigh more than 300g after mating. For crabs with eggs, the outline of the egg mass is required to be complete. The number of artificially cultivated crabs is controlled within three generations. 3.4 Cultivation density
5 to 6 crabs/m2, and the number is controlled within 3 crabs/m2 after eggs. 3.5 Wintering management
When the water temperature is around 13C, feed high-quality fresh feed and change water appropriately. When the water temperature drops to 8C, the submerged sand enters the wintering period. At this time, keep the water temperature stable, do not feed, change water less, avoid light, and reduce interference. 3.6 Strengthening cultivation
Determine the timing of temperature increase to promote maturity according to production needs, increase the temperature by 0.5℃ every day to a constant temperature of 18℃~19℃, feed shellfish meat, sandworms and other high-quality fresh feed in sufficient quantities according to 5%~8% of body weight, remove residual bait in time, change water, aerate, and keep the water fresh. 4 Seedling cultivation
4.1 Seedling water
NY/T5163—-2002
Follow 3.2.
4.2 Seedling pond
Indoor cement pool or large fiberglass tank, the area should be 20m2~50m, the water depth should be 1.5m~2.0m, and there should be water inlet and outlet, temperature control, light control and aeration facilities.
4.3 Seedling distribution method and density
After disinfection, the parent crabs with gray-black eggs and embryo heartbeats of more than 150 times/min are placed in net cages or plastic boxes and moved into the nursery pond for larval distribution. The larval density should be 15×10*tails/m2~25×10*tails/m2. 4.4 Larval cultivation
4.4.1 Water temperature control
The water temperature for seedling distribution is 19℃~20℃, 20℃~24℃ during the Z stage~Z stage, and 24℃~25℃ during the megalopause stage. The daily temperature difference should not exceed 1℃. After the crabs develop to the I stage, the temperature is gradually lowered to the stocking water temperature. 4.4.2 Feeding
Z stage, feed diatoms, golden algae and other single-celled algae and rotifers, and the B stage~Z stage. Feed rotifers and Artemia nauplii in the first stage, feed Artemia adult, minced shellfish, shrimp and fish meat in the megalopa and crab larvae, etc. Special compound feed can also be fed throughout the process, and it must meet the requirements of NY5072. Feed 4 to 8 times a day.
4.4.3 Water quality management
Replace the pond water according to the water quality, aerate and increase oxygen, so that the dissolved oxygen is maintained above 5mg/L. After the Z stage, the pond can be turned over and divided. 4.4.4 Disease prevention and control
Sediment, filter and disinfect the culture water. It is recommended to use physical methods such as ultraviolet rays and oxygen for disinfection; the use of preventive drugs should meet the requirements of NY5071, and it is recommended to use microecological preparations and water quality improvers. 4.4.5 Set up shelters
When entering the late stage of megalopa, shelters such as nets and oyster shells should be set up to prevent self-mutilation. 4.5 Seedlings out of the pond
Crab larvae can be out of the pond at the first stage of I stage. The fry can be scooped up with a sieve and the fry can be harvested in a seedling collection box. 5 Artificial breeding
5.1 Breeding environment
Requires smooth flow, no pollution, and convenient transportation; the water source meets the requirements of GB11607, with a salinity of 15~34: sandy mud bottom or muddy sand bottom. 5.2 Breeding facilities
5.2.1 Pond
The area is 0.3hm~2.0hm and the water depth is more than 1.5m. It is suitable to have water inlet and outlet gates, screens, etc. 5.2.2 Intensive sand pool
The area is 200m2~500m2 and the water depth is more than 0.5m. The bottom of the pool is covered with sand of 10cm~15cm, and a unified water inlet and outlet ditch is set. 5.2.3 Low dam high net pond
Area 0.3hm2~1.0hm\, with drainage gates. The net around the embankment is 0.8m~1.0m higher than the local highest tidal level, and the lower edge of the net is buried 30cm~50cm deep in the mud. It can store 0.6.m~1.0m of water after low tide. 5.3 Preparation before stocking
5.3.1 Desilting and pond preparation
After harvesting, remove the excessive silt, expose the pond bottom to the sun, repair the ridges, pond burials, and gates, and repeatedly wash the sand layer in the sand pool. 5.3.2 Disinfection and pest control
Before stocking, the breeding pond should be disinfected and pest-free, and the use of drugs should comply with the requirements of NY5071. Common drugs and their use methods are shown in Appendix A.
5.3.3 Set up shelters
NY/T51632002
For ponds with conditions, the bottom of the pond should be covered with sand in an appropriate amount, and pottery jars, tile bamboos, meshes, branches, bamboo strips, etc. should be set up for shelter. 5.3.4 Intake of water to cultivate basic bait
15 days before stocking, filter the incoming water with a mesh size of 0.25mm silk sieve 30cm~50cm, and apply fertilizer to cultivate basic bait. Fertilizers can be selected and used according to local water quality. Generally, nitrogen fertilizer 2mg/L~4mg/L, phosphorus fertilizer 0.2mg/L~0.4mg/L, or fermented and disinfected organic fertilizer 100mg/L~200mg/L, so that the water color appears yellow-green or yellow-brown. It is recommended to use the hanging bag and throwing bag method for applying organic fertilizer, and add water or topdressing according to the water color.
5.4 Seedlings stocking
5.4.1 Stocking time
April to September.
5.4.2 Stocking conditions
Water temperature is above 16℃, water depth is 0.6cm~0.8cm, transparency is 30cm40cm. It is not suitable to stock on windy and rainy days. 5.4.3 Seedlings source
Artificial crab seedlings and natural crab seedlings.
5.4.4 Seedlings selection
5.4.4.1 Seedlings quality
Select green-shell crab seedlings with normal body shape, complete limbs, strong individuals, fast crawling, sensitive reactions, and no diseases or injuries. 5.4.4.2 Artificial crab seedlings
It is advisable to select juvenile crabs of uniform size from stage 1 to stage 2 after molting from April to June, with a size of 3.6×10°/kg to 1.6×10/kg.
5.4.4.3 Natural crab seedlings
It is advisable to purchase natural juvenile crabs of basically uniform size that are caught in nearby waters from June to September. 5.4.5 Seedlings Transportation
Artificial crab seedlings can be transported in polyethylene plastic bags (40cm×70cm) filled with oxygen, with 50g~100g of seedlings in each bag. Juvenile crabs of large size are transported in seedling boxes and bamboo baskets, with nets, water plants and other habitats placed in the containers, and seawater is appropriately poured during transportation: live water boats and vehicles are used for longer transportation, and temperature control measures are adopted when necessary. Natural crab seedlings with a size of more than 50g should be transported after binding the claws. 5.4.6 Intermediate cultivation
Artificial seedlings that have just been produced and early natural seedlings with smaller sizes should be intermediately cultivated. Cultivate in a small sand pool or set up a cultivation area on one side of the culture pond, with a stocking density of 15/m*~20/m, and feed the crabs with minced fresh feed at 100%~200% of their body weight. Cultivate to stage V~M (individual weight 1g~3g) after 12d~20d, and put them into ponds for culture. 5.4.7 Stocking density
Determine the stocking density according to different breeding methods and seedling specifications. See Table 1 for the stocking density of pond culture. When mixed with shrimp, fish and shellfish, the stocking density should be reduced accordingly.
Source of seedlings
Artificial crab seedlings
Intermediate breeding seedlings
Natural crab seedlings
Natural crab seedlings
5.5 Breeding management
5.5.1 Water quality control
5.5.1.1 Water quality
Table 1 Stocking density table
Specifications/(pieces/kg)
3. 6×10+~1.6×10
2800~300
2800--140
Seedling density/(each/hm
9.0×10*~7.5×10
4.5X104-3.0X10
5.2X10~3.7X10
3.0X10~1. 5X10
NY/T5163—2002
The water quality meets the requirements of NY5052, the optimum temperature is 20℃~27℃C, the salinity is 15~34, the pH value is 7.8~8.6, the dissolved oxygen (DO) is above 5mg/L, the ammonium nitrogen (NH+-N) is below 0.5mg/L, the hydrogen sulfide (HS) is below 0.1mg/L, the chemical oxygen demand (COD) and the five-day biochemical oxygen demand (BOD) are below 5mg/L, and the transparency is 30cm40cm. 5.5.1.2 Water change
Depending on the water quality, change the water in time. In the early stage, add water, and change the water appropriately in the middle and late stages. The water level in the pond should be raised in high or low temperature seasons, and the upper fresh water should be discharged in time after the storm.
5.5.1.3 Regulation
Every Every half a month, pour 15 mg/L of quicklime throughout the pond, and add microecological preparations and water quality improvers from time to time to improve water quality and bottom quality. 5.5.2 Feeding
5.5.2.1 Feed types
Low-value shellfish such as short-toothed clams, red-fleshed blue clams, Xun's muscle clams, duck-billed clams, and small fish and shrimp caught at sea, as well as special compound feeds. The quality of compound feeds should meet the requirements of GB13078 and NY5072. 5.5.2.2 Feeding amount
The reference amount of fresh fish and shrimp feed for feeding at different growth stages is shown in Table 2, and should be adjusted appropriately according to the weather and feeding conditions. Adequate feeding should be given when a large number of molting occurs. Reduce the amount of feeding when the water temperature is below 15°C and above 32°C, and stop feeding when the water temperature is below 8°C. Table 2 Feeding rate table for different growth stages
Growth stage/period|| tt||Specification/(piece/kg)
3.6×10*~0.28×10
2800~300
300~140
140~30
Note: Daily feeding rate is the percentage of the amount of feed fed per day to the total weight of crabs in the pond. 5.5.2.3 Feeding location and time
Daily feeding rate/%
200~100
100~50
The feeding location is selected on the fixed beach around the pond, and feeding is done once in the morning and evening, with the evening accounting for 70% of the total daily feeding amount. 5.5.3 Male and female breeding
After September, when swimming crabs enter the mating period, some male crabs can be caught to gradually reduce the male-female ratio to 3:1.5:1 or even 10:1. At this time, natural crabs purchased for fattening and intensive breeding are also raised in the same way. 5.5.4 Disease prevention and control
5.5.4.1 Preventive measures
The following measures can be taken:
8) Dry pond desilting and disinfection;
b) Stocking high-quality seedlings:
c) Rationally feeding high-quality feed:
d) Improving water quality and improving bottom quality:
e) Regularly disinfecting water bodies with raw right ash 15mg/L, bleaching powder 1mg/L~1.5mg/L, chlorine dioxide 0.5mg/L~0.6mg/L, etc.
5.5.4.2 Treatment methods
When the disease is found, timely take the right medicine and take corresponding measures. The use of medicines should comply with the requirements of NY5071. 4
5.5.5 Prevent self-mutilation
The following measures can be taken:
a) Set up shelters:
b) Select crab seedlings of the same size:
c) Feed sufficient high-quality feed:
d) Keep the transparency at 30cm~~40cm
e) Reasonably control the male-female ratio.
5.5.6 Daily management
NY/T5163-2002
5.5.6.1 Patrol the pond
Patch the pond once in the early morning and evening every day to observe changes in water quality, check the activities and feeding conditions of crabs, inspect and repair the breeding facilities, and solve problems in a timely manner.
5.5.6.2 Growth and physical and chemical index determination
Regularly determine the growth indexes of crabs such as shell width, shell length, and weight, and determine various water quality indexes such as water temperature, pH value, and dissolved oxygen (DO). 5.5.6.3 Daily records
Establish production files and keep regular management records. 5.5.7 Harvest
5.5.7.1 Harvesting season
Harvest male crabs at an appropriate time, generally in September and October, and female crabs should be put on the market when their roe is red and their meat is fat. 5.5.7.2 Harvesting methods
Use drift nets, crab cages, draining water, and pond drying. 5.5.7.3 Temporary rearing
If conditions permit, the caught crabs can be tied to their claws and then placed in a temporary rearing pond for sale. 5.5.7.4 Transportation
Classify the commercial crabs into male and female and grade, use a live water truck or soak them in an ice water tank for 3min~5min to paralyze them, and then pack and transport them. NY/T5163—2002
Name of fishery drugs
Calcium oxide (quicklime)
Bleaching powder (effective chlorine ≥ 25%)
Chlorine dioxide
Tea seed cake
Appendix A
(Normative Appendix)
Common pond cleaning drugs and their use
Table A.1 Use of common pond cleaning drugs
Usage and dosage/(mg/L）
350~400
Note: The wastewater discharged after pond cleaning drugs should pay attention to the impact on the surrounding environment. Withdrawal period/d
Precautions
Do not mix with bleaching powder, organic fluorine, heavy metal salts, organic complexes.
1. Do not use metal objects to hold it.
2. Do not mix with acid, ammonium salts, quicklime. 1. Do not use metal objects to hold it.
2. Do not mix with other disinfectants.
Soak in water overnight after crushing, dilute and pour wine over the whole pool with the residue.
NY/T5163-2002
Agriculture of the People's Republic of China
Industry Standard Promotion
Technical Specification for the Breeding of Swimming Crabs for Pollution-free Food NY/T5163-2002
Published by China Standards Press
No. 16, Sanlihe North Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 6852394668517548
China Standards Press, Thailand Printed by the Island Printing Factory Distributed by the Beijing Distribution Office of Xinhua Bookstore Sold by Xinhua Bookstores in various places Format 880×12301/16 Printing sheet 3/4 Word count 14,000 words First edition in August 2002
First printing in August 2002
Print run 1-3000
Book number: 155066·2-14646 Price 8.00 yuan Website bzchs.com
Copyright reserved. Infringements will be investigated
Report phone number: (010) 685335337 Stocking density
Determine the stocking density according to different breeding methods and seedling specifications. See Table 1 for the stocking density of pond culture. When mixed with shrimp, fish and shellfish, the stocking density should be reduced accordingly.
Source of seedlings
Artificial crab seedlings
Intermediate breeding seedlings
Natural crab seedlings
Natural crab seedlings
5.5 Breeding management
5.5.1 Water quality control
5.5.1.1 Water quality
Table 1 Stocking density table
Specifications/(pieces/kg)
3. 6×10+~1.6×10
2800~300
2800--140
Seedling density/(each/hm
9.0×10*~7.5×10
4.5X104-3.0X10
5.2X10~3.7X10
3.0X10~1. 5X10
NY/T5163—2002
The water quality meets the requirements of NY5052, the optimum temperature is 20℃~27℃C, the salinity is 15~34, the pH value is 7.8~8.6, the dissolved oxygen (DO) is above 5mg/L, the ammonium nitrogen (NH+-N) is below 0.5mg/L, the hydrogen sulfide (HS) is below 0.1mg/L, the chemical oxygen demand (COD) and the five-day biochemical oxygen demand (BOD) are below 5mg/L, and the transparency is 30cm40cm. 5.5.1.2 Water change
Depending on the water quality, change the water in time. In the early stage, add water, and change the water appropriately in the middle and late stages. The water level in the pond should be raised in high or low temperature seasons, and the upper fresh water should be discharged in time after the storm.
5.5.1.3 Regulation
Every Every half a month, pour 15 mg/L of quicklime throughout the pond, and add microecological preparations and water quality improvers from time to time to improve water quality and bottom quality. 5.5.2 Feeding
5.5.2.1 Feed types
Low-value shellfish such as short-toothed clams, red-fleshed blue clams, Xun's muscle clams, duck-billed clams, and small fish and shrimp caught at sea, as well as special compound feeds. The quality of compound feeds should meet the requirements of GB13078 and NY5072. 5.5.2.2 Feeding amount
The reference amount of fresh fish and shrimp feed for feeding at different growth stages is shown in Table 2, and should be adjusted appropriately according to the weather and feeding conditions. Adequate feeding should be given when a large number of molting occurs. Reduce the amount of feeding when the water temperature is below 15°C and above 32°C, and stop feeding when the water temperature is below 8°C. Table 2 Feeding rate table for different growth stages
Growth stage/period|| tt||Specification/(piece/kg)
3.6×10*~0.28×10
2800~300
300~140
140~30
Note: Daily feeding rate is the percentage of the amount of feed fed per day to the total weight of crabs in the pond. 5.5.2.3 Feeding location and time
Daily feeding rate/%
200~100
100~50
The feeding location is selected on the fixed beach around the pond, and feeding is done once in the morning and evening, with the evening accounting for 70% of the total daily feeding amount. 5.5.3 Male and female breeding
After September, when swimming crabs enter the mating period, some male crabs can be caught to gradually reduce the male-female ratio to 3:1.5:1 or even 10:1. At this time, natural crabs purchased for fattening and intensive breeding are also raised in the same way. 5.5.4 Disease prevention and control
5.5.4.1 Preventive measures
The following measures can be taken:
8) Dry pond desilting and disinfection;
b) Stocking high-quality seedlings:
c) Rationally feeding high-quality feed:
d) Improving water quality and improving bottom quality:
e) Regularly disinfecting water bodies with raw right ash 15mg/L, bleaching powder 1mg/L~1.5mg/L, chlorine dioxide 0.5mg/L~0.6mg/L, etc.
5.5.4.2 Treatment methods
When the disease is found, timely take the right medicine and take corresponding measures. The use of medicines should comply with the requirements of NY5071. 4
5.5.5 Prevent self-mutilation
The following measures can be taken:
a) Set up shelters:
b) Select crab seedlings of the same size:
c) Feed sufficient high-quality feed:
d) Keep the transparency at 30cm~~40cm
e) Reasonably control the male-female ratio.
5.5.6 Daily management
NY/T5163-2002
5.5.6.1 Patrol the pond
Patch the pond once in the early morning and evening every day to observe changes in water quality, check the activities and feeding conditions of crabs, inspect and repair the breeding facilities, and solve problems in a timely manner.
5.5.6.2 Growth and physical and chemical index determination
Regularly determine the growth indexes of crabs such as shell width, shell length, and weight, and determine various water quality indexes such as water temperature, pH value, and dissolved oxygen (DO). 5.5.6.3 Daily records
Establish production files and keep regular management records. 5.5.7 Harvest
5.5.7.1 Harvesting season
Harvest male crabs at an appropriate time, generally in September and October, and female crabs should be put on the market when their roe is red and their meat is fat. 5.5.7.2 Harvesting methods
Use drift nets, crab cages, draining water, and pond drying. 5.5.7.3 Temporary rearing
If conditions permit, the caught crabs can be tied to their claws and then placed in a temporary rearing pond for sale. 5.5.7.4 Transportation
Classify the commercial crabs into male and female and grade, use a live water truck or soak them in an ice water tank for 3min~5min to paralyze them, and then pack and transport them. NY/T5163—2002
Name of fishery drugswww.bzxz.net
Calcium oxide (quicklime)
Bleaching powder (effective chlorine ≥ 25%)
Chlorine dioxide
Tea seed cake
Appendix A
(Normative Appendix)
Common pond cleaning drugs and their use
Table A.1 Use of common pond cleaning drugs
Usage and dosage/(mg/L）
350~400
Note: The wastewater discharged after pond cleaning drugs should pay attention to the impact on the surrounding environment. Withdrawal period/d
Precautions
Do not mix with bleaching powder, organic fluorine, heavy metal salts, organic complexes.
1. Do not use metal objects to hold it.
2. Do not mix with acid, ammonium salts, quicklime. 1. Do not use metal objects to hold it.
2. Do not mix with other disinfectants.
Soak in water overnight after crushing, dilute and pour wine over the whole pool with the residue.
NY/T5163-2002
Agriculture of the People's Republic of China
Industry Standard Promotion
Technical Specification for the Breeding of Swimming Crabs for Pollution-free Food NY/T5163-2002
Published by China Standards Press
No. 16, Sanlihe North Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 6852394668517548
China Standards Press, Thailand Printed by the Island Printing Factory Distributed by the Beijing Distribution Office of Xinhua Bookstore Sold by Xinhua Bookstores in various places Format 880×12301/16 Printing sheet 3/4 Word count 14,000 words First edition in August 2002
First printing in August 2002
Print run 1-3000
Book number: 155066·2-14646 Price 8.00 yuan Website bzchs.com
Copyright reserved. Infringements will be investigated
Report phone number: (010) 685335337 Stocking density
Determine the stocking density according to different breeding methods and seedling specifications. See Table 1 for the stocking density of pond culture. When mixed with shrimp, fish and shellfish, the stocking density should be reduced accordingly.
Source of seedlings
Artificial crab seedlings
Intermediate breeding seedlings
Natural crab seedlings
Natural crab seedlings
5.5 Breeding management
5.5.1 Water quality control
5.5.1.1 Water quality
Table 1 Stocking density table
Specifications/(pieces/kg)
3. 6×10+~1.6×10
2800~300
2800--140
Seedling density/(each/hm
9.0×10*~7.5×10
4.5X104-3.0X10
5.2X10~3.7X10
3.0X10~1. 5X10
NY/T5163—2002
The water quality meets the requirements of NY5052, the optimum temperature is 20℃~27℃C, the salinity is 15~34, the pH value is 7.8~8.6, the dissolved oxygen (DO) is above 5mg/L, the ammonium nitrogen (NH+-N) is below 0.5mg/L, the hydrogen sulfide (HS) is below 0.1mg/L, the chemical oxygen demand (COD) and the five-day biochemical oxygen demand (BOD) are below 5mg/L, and the transparency is 30cm40cm. 5.5.1.2 Water change
Depending on the water quality, change the water in time. In the early stage, add water, and change the water appropriately in the middle and late stages. The water level in the pond should be raised in high or low temperature seasons, and the upper fresh water should be discharged in time after the storm.
5.5.1.3 Regulation
Every Every half a month, pour 15 mg/L of quicklime throughout the pond, and add microecological preparations and water quality improvers from time to time to improve water quality and bottom quality. 5.5.2 Feeding
5.5.2.1 Feed types
Low-value shellfish such as short-toothed clams, red-fleshed blue clams, Xun's muscle clams, duck-billed clams, and small fish and shrimp caught at sea, as well as special compound feeds. The quality of compound feeds should meet the requirements of GB13078 and NY5072. 5.5.2.2 Feeding amount
The reference amount of fresh fish and shrimp feed for feeding at different growth stages is shown in Table 2, and should be adjusted appropriately according to the weather and feeding conditions. Adequate feeding should be given when a large number of molting occurs. Reduce the amount of feeding when the water temperature is below 15°C and above 32°C, and stop feeding when the water temperature is below 8°C. Table 2 Feeding rate table for different growth stages
Growth stage/period|| tt||Specification/(piece/kg)
3.6×10*~0.28×10
2800~300
300~140
140~30
Note: Daily feeding rate is the percentage of the amount of feed fed per day to the total weight of crabs in the pond. 5.5.2.3 Feeding location and time
Daily feeding rate/%
200~100
100~50
The feeding location is selected on the fixed beach around the pond, and feeding is done once in the morning and evening, with the evening accounting for 70% of the total daily feeding amount. 5.5.3 Male and female breeding
After September, when swimming crabs enter the mating period, some male crabs can be caught to gradually reduce the male-female ratio to 3:1.5:1 or even 10:1. At this time, natural crabs purchased for fattening and intensive breeding are also raised in the same way. 5.5.4 Disease prevention and control
5.5.4.1 Preventive measures
The following measures can be taken:
8) Dry pond desilting and disinfection;
b) Stocking high-quality seedlings:
c) Rationally feeding high-quality feed:
d) Improving water quality and improving bottom quality:
e) Regularly disinfecting water bodies with raw right ash 15mg/L, bleaching powder 1mg/L~1.5mg/L, chlorine dioxide 0.5mg/L~0.6mg/L, etc.
5.5.4.2 Treatment methods
When the disease is found, timely take the right medicine and take corresponding measures. The use of medicines should comply with the requirements of NY5071. 4
5.5.5 Prevent self-mutilation
The following measures can be taken:
a) Set up shelters:
b) Select crab seedlings of the same size:
c) Feed sufficient high-quality feed:
d) Keep the transparency at 30cm~~40cm
e) Reasonably control the male-female ratio.
5.5.6 Daily management
NY/T5163-2002
5.5.6.1 Patrol the pond
Patch the pond once in the early morning and evening every day to observe changes in water quality, check the activities and feeding conditions of crabs, inspect and repair the breeding facilities, and solve problems in a timely manner.
5.5.6.2 Growth and physical and chemical index determination
Regularly determine the growth indexes of crabs such as shell width, shell length, and weight, and determine various water quality indexes such as water temperature, pH value, and dissolved oxygen (DO). 5.5.6.3 Daily records
Establish production files and keep regular management records. 5.5.7 Harvest
5.5.7.1 Harvesting season
Harvest male crabs at an appropriate time, generally in September and October, and female crabs should be put on the market when their roe is red and their meat is fat. 5.5.7.2 Harvesting methods
Use drift nets, crab cages, draining water, and pond drying. 5.5.7.3 Temporary rearing
If conditions permit, the caught crabs can be tied to their claws and then placed in a temporary rearing pond for sale. 5.5.7.4 Transportation
Classify the commercial crabs into male and female and grade, use a live water truck or soak them in an ice water tank for 3min~5min to paralyze them, and then pack and transport them. NY/T5163—2002
Name of fishery drugs
Calcium oxide (quicklime)
Bleaching powder (effective chlorine ≥ 25%)
Chlorine dioxide
Tea seed cake
Appendix A
(Normative Appendix)
Common pond cleaning drugs and their use
Table A.1 Use of common pond cleaning drugs
Usage and dosage/(mg/L）
350~400
Note: The wastewater discharged after pond cleaning drugs should pay attention to the impact on the surrounding environment. Withdrawal period/d
Precautions
Do not mix with bleaching powder, organic fluorine, heavy metal salts, organic complexes.
1. Do not use metal objects to hold it.
2. Do not mix with acid, ammonium salts, quicklime. 1. Do not use metal objects to hold it.
2. Do not mix with other disinfectants.
Soak in water overnight after crushing, dilute and pour wine over the whole pool with the residue.
NY/T5163-2002
Agriculture of the People's Republic of China
Industry Standard Promotion
Technical Specification for the Breeding of Swimming Crabs for Pollution-free Food NY/T5163-2002
Published by China Standards Press
No. 16, Sanlihe North Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 6852394668517548
China Standards Press, Thailand Printed by the Island Printing Factory Distributed by the Beijing Distribution Office of Xinhua Bookstore Sold by Xinhua Bookstores in various places Format 880×12301/16 Printing sheet 3/4 Word count 14,000 words First edition in August 2002
First printing in August 2002
Print run 1-3000
Book number: 155066·2-14646 Price 8.00 yuan Website bzchs.com
Copyright reserved. Infringements will be investigated
Report phone number: (010) 685335331mg/L or less, chemical oxygen demand (COD) and five-day biochemical oxygen demand (BOD) are less than 5mg/L, and the transparency is 30cm40cm. 5.5.1.2 Water change
Depending on the water quality, change the water in time. In the early stage, add water as the main method, and change the water appropriately in the middle and late stages. In the high or low temperature season, the water level in the pond should be raised, and the upper fresh water should be drained in time after the storm.
5.5.1.3 Regulation
Every half a month, pour 15mg/L of quicklime in the whole pond, and put in microecological preparations and water quality improvers from time to time to improve the water quality and bottom quality. 5.5.2 Feed feeding
5.5.2.1 Feed types
For low-value shellfish such as short-toothed clams, red-fleshed blue clams, Xun's muscle clams, duck-billed clams, and small fish and shrimp caught at sea, as well as special compound feeds. The quality of compound feeds should meet the requirements of GB13078 and NY5072. 5.5.2.2 Feeding amount
The reference amount of fresh fish and shrimp feed for different growth stages is shown in Table 2, and it should be adjusted appropriately according to the weather and feeding conditions. Adequate feeding should be given when a large number of crabs molt. Reduce the feeding amount when the water temperature is below 15℃ and above 32℃, and stop feeding when the temperature is below 8℃. Table 2 Feeding rate table for different growth stages
Growth stage/period
Specification/(crab/kg)
3.6×10*~0.28×10
2800~300
300~140
140~30
Note: Daily feeding rate is the percentage of feed fed per day to the total weight of crabs in the pond. 5.5.2.3 Feeding location and time
Daily feeding rate/%
200~100
100~50
Feeding location is selected on the fixed beach around the pond, feeding once in the morning and evening, and evening accounts for 70% of the total daily feeding amount. 5.5.3 Male-female breeding
After September, swimming crabs enter the mating period and some male crabs can be caught, so that the male-female ratio gradually decreases to 3:1.5:1 or even 10:1. At this time, natural crabs purchased for fattening and intensive breeding are also raised in the same way. 5.5.4 Disease prevention and control
5.5.4.1 Preventive measures
The following measures can be taken:
8) Dry ponds, dredge and disinfect;
b) Stock high-quality seedlings:
c) Rationally feed high-quality feed:
d) Improve water quality and improve bottom quality:
e) Regularly disinfect water bodies with 15mg/L of raw right ash, 1mg/L~1.5mg/L of bleaching powder, and 0.5mg/L~0.6mg/L of chlorine dioxide.
5.5.4.2 Treatment methods
When a disease is found, take appropriate measures in a timely manner. The use of drugs should comply with the requirements of NY5071. 4
5.5.5 Prevent self-mutilation
The following measures can be taken:
a) Set up shelters:
b) Select crab seedlings of the same size:
c) Feed sufficient high-quality feed:
d) Keep the transparency at 30cm~~40cm
e) Reasonably control the male-female ratio.
5.5.6 Daily management
NY/T5163-2002
5.5.6.1 Patrol the pond
Patch the pond once in the early morning and evening every day to observe changes in water quality, check the activities and feeding conditions of crabs, inspect and repair the breeding facilities, and solve problems in a timely manner.
5.5.6.2 Growth and physical and chemical index determination
Regularly determine the growth indexes of crabs such as shell width, shell length, and weight, and determine various water quality indexes such as water temperature, pH value, and dissolved oxygen (DO). 5.5.6.3 Daily records
Establish production files and keep regular management records. 5.5.7 Harvest
5.5.7.1 Harvesting season
Harvest male crabs at an appropriate time, generally in September and October, and female crabs should be put on the market when their roe is red and their meat is fat. 5.5.7.2 Harvesting methods
Use drift nets, crab cages, draining water, and pond drying. 5.5.7.3 Temporary rearing
If conditions permit, the caught crabs can be tied to their claws and then placed in a temporary rearing pond for sale. 5.5.7.4 Transportation
Classify the commercial crabs into male and female and grade, use a live water truck or soak them in an ice water tank for 3min~5min to paralyze them, and then pack and transport them. NY/T5163—2002
Name of fishery drugs
Calcium oxide (quicklime)
Bleaching powder (effective chlorine ≥ 25%)
Chlorine dioxide
Tea seed cake
Appendix A
(Normative Appendix)
Common pond cleaning drugs and their use
Table A.1 Use of common pond cleaning drugs
Usage and dosage/(mg/L）
350~400
Note: The wastewater discharged after pond cleaning drugs should pay attention to the impact on the surrounding environment. Withdrawal period/d
Precautions
Do not mix with bleaching powder, organic fluorine, heavy metal salts, organic complexes.
1. Do not use metal objects to hold it.
2. Do not mix with acid, ammonium salts, quicklime. 1. Do not use metal objects to hold it.
2. Do not mix with other disinfectants.
Soak in water overnight after crushing, dilute and pour wine over the whole pool with the residue.
NY/T5163-2002
Agriculture of the People's Republic of China
Industry Standard Promotion
Technical Specification for the Breeding of Swimming Crabs for Pollution-free Food NY/T5163-2002
Published by China Standards Press
No. 16, Sanlihe North Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 6852394668517548
China Standards Press, Thailand Printed by the Island Printing Factory Distributed by the Beijing Distribution Office of Xinhua Bookstore Sold by Xinhua Bookstores in various places Format 880×12301/16 Printing sheet 3/4 Word count 14,000 words First edition in August 2002
First printing in August 2002
Print run 1-3000
Book number: 155066·2-14646 Price 8.00 yuan Website bzchs.com
Copyright reserved. Infringements will be investigated
Report phone number: (010) 685335331mg/L or less, chemical oxygen demand (COD) and five-day biochemical oxygen demand (BOD) are less than 5mg/L, and the transparency is 30cm40cm. 5.5.1.2 Water change
Depending on the water quality, change the water in time. In the early stage, add water as the main method, and change the water appropriately in the middle and late stages. In the high or low temperature season, the water level in the pond should be raised, and the upper fresh water should be drained in time after the storm.
5.5.1.3 Regulation
Every half a month, pour 15mg/L of quicklime in the whole pond, and put in microecological preparations and water quality improvers from time to time to improve the water quality and bottom quality. 5.5.2 Feed feeding
5.5.2.1 Feed types
For low-value shellfish such as short-toothed clams, red-fleshed blue clams, Xun's muscle clams, duck-billed clams, and small fish and shrimp caught at sea, as well as special compound feeds. The quality of compound feeds should meet the requirements of GB13078 and NY5072. 5.5.2.2 Feeding amount
The reference amount of fresh fish and shrimp feed for different growth stages is shown in Table 2, and it should be adjusted appropriately according to the weather and feeding conditions. Adequate feeding should be given when a large number of crabs molt. Reduce the feeding amount when the water temperature is below 15℃ and above 32℃, and stop feeding when the temperature is below 8℃. Table 2 Feeding rate table for different growth stages
Growth stage/period
Specification/(crab/kg)
3.6×10*~0.28×10
2800~300
300~140
140~30
Note: Daily feeding rate is the percentage of feed fed per day to the total weight of crabs in the pond. 5.5.2.3 Feeding location and time
Daily feeding rate/%
200~100
100~50
Feeding location is selected on the fixed beach around the pond, feeding once in the morning and evening, and evening accounts for 70% of the total daily feeding amount. 5.5.3 Male-female breeding
After September, swimming crabs enter the mating period and some male crabs can be caught, so that the male-female ratio gradually decreases to 3:1.5:1 or even 10:1. At this time, natural crabs purchased for fattening and intensive breeding are also raised in the same way. 5.5.4 Disease prevention and control
5.5.4.1 Preventive measures
The following measures can be taken:
8) Dry ponds, dredge and disinfect;
b) Stock high-quality seedlings:
c) Rationally feed high-quality feed:
d) Improve water quality and improve bottom quality:
e) Regularly disinfect water bodies with 15mg/L of raw right ash, 1mg/L~1.5mg/L of bleaching powder, and 0.5mg/L~0.6mg/L of chlorine dioxide.
5.5.4.2 Treatment methods
When a disease is found, take appropriate measures in a timely manner. The use of drugs should comply with the requirements of NY5071. 4
5.5.5 Prevent self-mutilation
The following measures can be taken:
a) Set up shelters:
b) Select crab seedlings of the same size:
c) Feed sufficient high-quality feed:
d) Keep the transparency at 30cm~~40cm
e) Reasonably control the male-female ratio.
5.5.6 Daily management
NY/T5163-2002
5.5.6.1 Patrol the pond
Patch the pond once in the early morning and evening every day to observe changes in water quality, check the activities and feeding conditions of crabs, inspect and repair the breeding facilities, and solve problems in a timely manner.
5.5.6.2 Growth and physical and chemical index determination
Regularly determine the growth indexes of crabs such as shell width, shell length, and weight, and determine various water quality indexes such as water temperature, pH value, and dissolved oxygen (DO). 5.5.6.3 Daily records
Establish production files and keep regular management records. 5.5.7 Harvest
5.5.7.1 Harvesting season
Harvest male crabs at an appropriate time, generally in September and October, and female crabs should be put on the market when their roe is red and their meat is fat. 5.5.7.2 Harvesting methods
Use drift nets, crab cages, draining water, and pond drying. 5.5.7.3 Temporary rearing
If conditions permit, the caught crabs can be tied to their claws and then placed in a temporary rearing pond for sale. 5.5.7.4 Transportation
Classify the commercial crabs into male and female and grade, use a live water truck or soak them in an ice water tank for 3min~5min to paralyze them, and then pack and transport them. NY/T5163—2002
Name of fishery drugs
Calcium oxide (quicklime)
Bleaching powder (effective chlorine ≥ 25%)
Chlorine dioxide
Tea seed cake
Appendix A
(Normative Appendix)
Common pond cleaning drugs and their use
Table A.1 Use of common pond cleaning drugs
Usage and dosage/(mg/L）
350~400
Note: The wastewater discharged after pond cleaning drugs should pay attention to the impact on the surrounding environment. Withdrawal period/d
Precautions
Do not mix with bleaching powder, organic fluorine, heavy metal salts, organic complexes.
1. Do not use metal objects to hold it.
2. Do not mix with acid, ammonium salts, quicklime. 1. Do not use metal objects to hold it.
2. Do not mix with other disinfectants.
Soak in water overnight after crushing, dilute and pour wine over the whole pool with the residue.
NY/T5163-2002
Agriculture of the People's Republic of China
Industry Standard Promotion
Technical Specification for the Breeding of Swimming Crabs for Pollution-free Food NY/T5163-2002
Published by China Standards Press
No. 16, Sanlihe North Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 6852394668517548
China Standards Press, Thailand Printed by the Island Printing Factory Distributed by the Beijing Distribution Office of Xinhua Bookstore Sold by Xinhua Bookstores in various places Format 880×12301/16 Printing sheet 3/4 Word count 14,000 words First edition in August 2002
First printing in August 2002
Print run 1-3000
Book number: 155066·2-14646 Price 8.00 yuan Website bzchs.com
Copyright reserved. Infringements will be investigated
Report phone number: (010) 685335332 Treatment methods
When the disease is found, take appropriate measures in time. The use of drugs should comply with the requirements of NY5071. 4
5.5.5 Prevent self-mutilation
The following measures can be taken:
a) Set up shelters:
b) Select crab seedlings of the same size:
c) Feed sufficient high-quality feed:
d) Keep the transparency at 30cm~~40cm
e) Reasonably control the male-female ratio.
5.5.6 Daily management
NY/T5163-2002
5.5.6.1 Patrol the pond
Patrol the pond once in the early morning and evening every day to observe changes in water quality, check the activities and feeding conditions of crabs, inspect and repair the breeding facilities, and solve problems in a timely manner.
5.5.6.2 Growth and physical and chemical index determination
Regularly determine the growth indexes of crabs such as shell width, shell length, and weight, and determine various water quality indexes such as water temperature, pH value, and dissolved oxygen (DO). 5.5.6.3 Daily records
Establish production files and keep regular management records. 5.5.7 Harvest
5.5.7.1 Harvesting season
Harvest male crabs at an appropriate time, generally in September and October, and female crabs should be put on the market when their roe is red and their meat is fat. 5.5.7.2 Harvesting methods
Use drift nets, crab cages, draining water, and pond drying. 5.5.7.3 Temporary rearing
If conditions permit, the caught crabs can be tied to their claws and then placed in a temporary rearing pond for sale. 5.5.7.4 Transportation
Classify the commercial crabs into male and female and grade, use a live water truck or soak them in an ice water tank for 3min~5min to paralyze them, and then pack and transport them. NY/T5163—2002
Name of fishery drugs
Calcium oxide (quicklime)
Bleaching powder (effective chlorine ≥ 25%)
Chlorine dioxide
Tea seed cake
Appendix A
(Normative Appendix)
Common pond cleaning drugs and their use
Table A.1 Use of common pond cleaning drugs
Usage and dosage/(mg/L）
350~400
Note: The wastewater discharged after pond cleaning drugs should pay attention to the impact on the surrounding environment. Withdrawal period/d
Precautions
Do not mix with bleaching powder, organic fluorine, heavy metal salts, organic complexes.
1. Do not use metal objects to hold it.
2. Do not mix with acid, ammonium salts, quicklime. 1. Do not use metal objects to hold it.
2. Do not mix with other disinfectants.
Soak in water overnight after crushing, dilute and pour wine over the whole pool with the residue.
NY/T5163-2002
Agriculture of the People's Republic of China
Industry Standard Promotion
Technical Specification for the Breeding of Swimming Crabs for Pollution-free Food NY/T5163-2002
Published by China Standards Press
No. 16, Sanlihe North Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 6852394668517548
China Standards Press, Thailand Printed by the Island Printing Factory Distributed by the Beijing Distribution Office of Xinhua Bookstore Sold by Xinhua Bookstores in various places Format 880×12301/16 Printing sheet 3/4 Word count 14,000 words First edition in August 2002
First printing in August 2002
Print run 1-3000
Book number: 155066·2-14646 Price 8.00 yuan Website bzchs.com
Copyright reserved. Infringements will be investigated
Report phone number: (010) 685335332 Treatment methods
When the disease is found, take appropriate measures in time. The use of drugs should comply with the requirements of NY5071. 4
5.5.5 Prevent self-mutilation
The following measures can be taken:
a) Set up shelters:
b) Select crab seedlings of the same size:
c) Feed sufficient high-quality feed:
d) Keep the transparency at 30cm~~40cm
e) Reasonably control the male-female ratio.
5.5.6 Daily management
NY/T5163-2002
5.5.6.1 Patrol the pond
Patrol the pond once in the early morning and evening every day to observe changes in water quality, check the activities and feeding conditions of crabs, inspect and repair the breeding facilities, and solve problems in a timely manner.
5.5.6.2 Growth and physical and chemical index determination
Regularly determine the growth indexes of crabs such as shell width, shell length, and weight, and determine various water quality indexes such as water temperature, pH value, and dissolved oxygen (DO). 5.5.6.3 Daily records
Establish production files and keep regular management records. 5.5.7 Harvest
5.5.7.1 Harvesting season
Harvest male crabs at an appropriate time, generally in September and October, and female crabs should be put on the market when their roe is red and their meat is fat. 5.5.7.2 Harvesting methods
Use drift nets, crab cages, draining water, and pond drying. 5.5.7.3 Temporary rearing
If conditions permit, the caught crabs can be tied to their claws and then placed in a temporary rearing pond for sale. 5.5.7.4 Transportation
Classify the commercial crabs into male and female and grade, use a live water truck or soak them in an ice water tank for 3min~5min to paralyze them, and then pack and transport them. NY/T5163—2002
Name of fishery drugs
Calcium oxide (quicklime)
Bleaching powder (effective chlorine ≥ 25%)
Chlorine dioxide
Tea seed cake
Appendix A
(Normative Appendix)
Common pond cleaning drugs and their use
Table A.1 Use of common pond cleaning drugs
Usage and dosage/(mg/L）
350~400
Note: The wastewater discharged after pond cleaning drugs should pay attention to the impact on the surrounding environment. Withdrawal period/d
Precautions
Do not mix with bleaching powder, organic fluorine, heavy metal salts, organic complexes.
1. Do not use metal objects to hold it.
2. Do not mix with acid, ammonium salts, quicklime. 1. Do not use metal objects to hold it.
2. Do not mix with other disinfectants.
Soak in water overnight after crushing, dilute and pour wine over the whole pool with the residue.
NY/T5163-2002
Agriculture of the People's Republic of China
Industry Standard Promotion
Technical Specification for the Breeding of Swimming Crabs for Pollution-free Food NY/T5163-2002
Published by China Standards Press
No. 16, Sanlihe North Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 6852394668517548
China Standards Press, Thailand Printed by the Island Printing Factory Distributed by the Beijing Distribution Office of Xinhua Bookstore Sold by Xinhua Bookstores in various places Format 880×12301/16 Printing sheet 3/4 Word count 14,000 words First edition in August 2002
First printing in August 2002
Print run 1-3000
Book number: 155066·2-14646 Price 8.00 yuan Website bzchs.com
Copyright reserved. Infringements will be investigated
Report phone number: (010) 68533533
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.