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Japanese scallop sea area breeding method

A technology for scallops and sea areas, which is applied to the field of picking seedlings in the sea areas of scallops scallops, can solve the problems of decline in population genetic diversity, increase in mortality during the breeding period, and increased difficulty in artificial seedling breeding, achieve strong environmental adaptability, improve The number of bagged seedlings and the effect of avoiding loss of seedlings

Inactive Publication Date: 2009-12-23
ZHANGZIDAO GRP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For a long time, the seedlings used to increase the culture of scallops in my country have all relied on artificial seedlings. Due to the small population of introduced species, the genetic diversity of the population has declined, resulting in obvious degradation of germplasm, increasing the difficulty of artificial seedlings, and mortality during the breeding period. Therefore, there is an urgent need to produce natural seeds to drive industrial upgrading and promote the sustainable and healthy development of shallow sea aquaculture.

Method used

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  • Japanese scallop sea area breeding method

Examples

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Effect test

Embodiment 1

[0039] At the Moon Bay No. 1 station on the side of the Bohai Sea in Lushun, the gonad index of the floating raft cultured mussels was monitored. At the end of April and the beginning of May, a large number of spawning mussels were spawned, and the average gonad index dropped by 4.5%, indicating that the spawning peak had entered, so the larvae in the sea area were trawled to investigate. By mid-May, a large number of larvae appeared for the first time in the sea area, and the density of bivalves larvae was 754 / m 3 , the large individuals above 200 μm reached 73.6%, and later the large individuals above 250 μm reached 46.8%, and the seedlings were picked by throwing bags. The density of larvae was about 1608 / m as measured by towing in the sea area of ​​Moon Bay No. 1 station at the end of May 3 Among them, the large individuals above 200 μm accounted for 78.7%, and the large individuals above 250 μm reached 55.6%, so the seedlings were collected in bags during the second larva...

Embodiment 2

[0049] Select a representative sea area for the increase of scallops, and monitor the gonad index of scallops cultured on floating rafts in Daqin Island and Dalian Qixianling respectively:

[0050] During the period from March 29th to April 5th in Daqin Island floating raft cultured scallops, the gonad index dropped from 27.91% to 24.39%, a decrease of 3.52%. This is the peak of spawning, and the water temperature rises from 3.4°C to 4.0°C; From April 26th to May 3rd, there was another spawning peak, the gonad index dropped from 22.3% to 18.48%, a drop of 3.82%, and the water temperature rose from 5.4°C to 6.0°C, and the spawning period basically ended;

[0051] During the period from March 14th to March 21st in Dalian Qixianling floating raft cultured scallops, the gonad index dropped from 23.56% to 19.97%, a drop of 3.59%. This is the peak of spawning, and the water temperature rises from 3.4°C to 3.7°C ; From April 11th to April 21st, a large spawning peak appeared again, t...

Embodiment 3

[0076] Seedlings were harvested at the No. 4 station in Moon Bay, No. 5 station in Erdaoquan, No. 6 station in Dongtuozi, and No. 7 station in Shuangdao.

[0077] See Table 11 for details of the gonad index survey at Dongtuozi Station No. 6.

[0078] Table 11

[0079]

[0080] At the same time, a representative sea area for scallop breeding was selected to monitor the gonad index of floating raft cultured shellfish in Xiaochangshan Island and Dachangshan Island respectively. During the period from March 20th to 27th, the gonad index dropped from 26.24% to 19.44%, a drop of 6.8%, indicating that the spawning peak was reached, and the water temperature rose from 4.5°C to 5.2°C. During the period from March 19th to 26th, the gonad index dropped from 24.94% to 18.78%, a drop of 6.16%, indicating that this period was the peak of spawning, and the water temperature rose from 4.4°C to 5.2°C. ℃.

[0081] Monitoring of larvae in the sea area, Moon Bay Station No. 4, on May 14, th...

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Abstract

The invention relates to a Japanese scallop sea area breeding method which comprises the following steps: monitoring germen indexes to parent scallops of Japanese scallops in a sea area in a propagate season; monitoring the quantity and the size of baby scallops in the sea area having the baby scallops of the Japanese scallop after the monitoring data show the oviposition, and putting a breeding device into the set bearing area when the monitoring of the number and the size of the baby scallops shows the proportion of adhering baby scallops: bivalve shell baby scallops with shell height more than 200 micrometers occupy more than 40 percent of the total of bivalve shell baby scallops, or the bivalve shell baby scallops with shell height more than 230 micrometers occupy more than 20 percent of the total of the bivalve shell baby scallops, or the bivalve shell baby scallops with shell height more than 250 micrometers occupy 5-10 percent of the total of the bivalve shell baby scallops. The Japanese scallop sea area breeding method can obtain natural degeneration-resistant excellent baby scallops in an open sea area, realizes the massive production of the natural baby scallops, and develops a source of the natural green baby scallops.

Description

technical field [0001] The invention relates to a method for collecting seedlings of shellfish, in particular to a method for collecting seedlings of Ezo scallops in sea areas. Background technique [0002] Ezo scallop (Patinopecten yessoensis Jay, 1857) is native to the coastal waters of northern Japan and the Russian Far East. After being introduced from Japan in the early 1990s, research on seed breeding, intermediate breeding, and multi-culture technology was carried out, making this species "settle down" in the northern part of the Yellow Sea in my country; through more than 20 years of multi-culture, the multi-culture of Ezo scallop has become a driving force for the development of local shallow sea aquaculture industry. It is a pillar industry and also the largest industry in the world for the introduction and breeding of Ezo scallops. [0003] For a long time, the seedlings used to increase the culture of scallops in my country have all relied on artificial seedlings....

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 李文姬薛真福姜连新王诗欢张明鲁学辉李华琳王伟东王军付洪军罗鸣臧有才
Owner ZHANGZIDAO GRP
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