A kind of breeding method of low-salt-tolerant Apostichopus japonicus seed

Abstract

The invention provides a method for breeding seedlings of low-salt tolerance sea cucumber, which is characterized in that: before the seawater temperature is 12°C in late March, select sea cucumbers that have been cultured for more than 1.5 years and have an individual weight of more than 250 g / head from the estuary-type low-salt sea area. The local sea cucumbers were isolated and temporarily raised in ponds as the basic population for breeding. When the salinity was 20±1.5 and the temperature was 16°C during the flood season in May, those still eating and growing normally were selected as seed ginseng and artificially grown in a salinity environment of 20±1.5. Breeding to obtain F1 progeny seedlings, and the mature F1 progeny individuals after 2 years of cultivation are then selfed and hybridized with the selected basic population to obtain F2 progeny. Under high temperature conditions, with this cycle, after 3 to 4 generations of selective breeding, low-salt-tolerant sea cucumbers with stable genetic traits and low salinity can be obtained, which can expand the range of suitable cultivation, increase yield and product quality, reduce production risks and Improve the economic benefits of fishermen.

Description

technical field

[0001] The invention relates to seawater culture technology, in particular to a breeding method for low-salt-tolerant sea cucumber seedlings. Background technique

[0002] Apostichopus japonicus is a kind of narrow-saline animal, and the suitable growth salinity range is 26-35. In my country, it is mainly distributed in the yellow sea and Bohai sea with suitable salinity in Liaoning, Shandong and Hebei. In order to further expand the sea cucumber breeding space, expand the breeding scale, and increase production to meet the growing consumer demand, Shandong Province has taken the lead in conducting breeding experiments in the low-salt sea area of ​​the Yellow River Delta where there is no natural distribution of sea cucumbers since 2003. In 2005, it was successful and proposed The development strategy of "East ginseng and West cultivation" has been adopted. At present, the area of ​​pond culture has been developed to about 337,000 mu, accounting for 69.5% of ...

Examples

specific Embodiment

[0035] (1) On March 20, 2009, sea cucumbers that had been cultured for more than 1.5 years and had an individual weight of more than 300g / head were selected from a breeding pond in a certain area of ​​the Yellow River Delta in Shandong as the basic population for breeding, and moved to industrialized breeding ponds separately. For temporary storage, the water in the temporary storage pool is mixed with natural seawater and underground well water to adjust the salinity to 20±1.5 and placed for 48 hours before use. Keep the pH value at 7.8-8.5, the dissolved oxygen above 5mg / L, and the temperature within 16°C. Feed the compound feed at 1% to 3% of the body weight of sea cucumbers every day, and stop 5 days before induced labor.

[0036] (2) On May 12, select individuals who still eat and grow normally and have strong vitality, and use the method of drying in the shade + running water stimulation to artificially induce labor. The egg-laying water temperature is 20°C and the salini...

technical field

[0001] The invention relates to seawater culture technology, in particular to a breeding method for low-salt-tolerant sea cucumber seedlings. Background technique

[0002] Apostichopus japonicus is a kind of narrow-saline animal, and the suitable growth salinity range is 26-35. In my country, it is mainly distributed in the yellow sea and Bohai sea with suitable salinity in Liaoning, Shandong and Hebei. In order to further expand the sea cucumber breeding space, expand the breeding scale, and increase production to meet the growing consumer demand, Shandong Province has taken the lead in conducting breeding experiments in the low-salt sea area of ​​the Yellow River Delta where there is no natural distribution of sea cucumbers since 2003. In 2005, it was successful and proposed The development strategy of "East ginseng and West cultivation" has been adopted. At present, the area of ​​pond culture has been developed to about 337,000 mu, accounting for 69.5% of ...

Examples

specific Embodiment

[0035] (1) On March 20, 2009, sea cucumbers that had been cultured for more than 1.5 years and had an individual weight of more than 300g / head were selected from a breeding pond in a certain area of ​​the Yellow River Delta in Shandong as the basic population for breeding, and moved to industrialized breeding ponds separately. For temporary storage, the water in the temporary storage pool is mixed with natural seawater and underground well water to adjust the salinity to 20±1.5 and placed for 48 hours before use. Keep the pH value at 7.8-8.5, the dissolved oxygen above 5mg / L, and the temperature within 16°C. Feed the compound feed at 1% to 3% of the body weight of sea cucumbers every day, and stop 5 days before induced labor.

[0036] (2) On May 12, select individuals who still eat and grow normally and have strong vitality, and use the method of drying in the shade + running water stimulation to artificially induce labor. The egg-laying water temperature is 20°C and the salini...

Images