한국양식학회지 (Journal of Aquaculture)
- 제6권4호
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- Pages.235-253
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- 1993
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- 1226-0193(pISSN)
동남참게, Eriocheir japonicus (De Haan)의 종묘생산에 관한 생물학적 기초연구 1. 번식생태
Studies on the Seedling Production of the Freshwater Crab, Eriocheir japonicus (De Haan) 1. Reproductive Ecology
- KWON Chin-Soo (Department of Biology, College of Natural Science Dong Dui University) ;
- LEE Bok-Kyu (Department of Biology, College of Natural Science Dong Dui University) ;
- LEE Chae-Sung (Department of Biology, College of Natural Science Dong Dui University)
- 발행 : 1993.11.01
초록
동남참게, Eriocheir japonicus의 인공 채란 방식을 확립시키기 위하여 1990년11월-1991년7월까지 경남 하동군 섬진강 하구역에서 채집한 자웅성체를 사육하면서 교미로부터 산란 및 포난까지에 소요되는 시간, 난발생과 부화에 따른 온도와 염분농도와의 관계 등 생물학적 기초과제를 조사한 결과는 다음과 같다. 교미로부터 산난개시까지에 소요되는 시간은 2-8시간이 걸리고, 산난개시로부터 포난이 완료될 때까지에는 대체로 3-9시간이 소요되며 난은 포난실내에서 체외수정을 한다. 인위적인 교미 조절에 의해 연간 최소한 4-6회의 산란을 시킬 수 있었으며, 포란수는 흉갑장의 길이가 6cm인 경우에는 대체로
The freshwater crab, Eriocheir japonicus inhabits from sub-tropical to temperate zone in Asia. This species belongs to a large size group among freshwater crabs. Common size of this crab is 5-6cm in carapace length and occasionally 7cm in carapace length. This species of crab used to inhabit in estuaries, rivers and inland waters in Korea. However, natural population recently has been rapidly decreased because of pollution and lost their habitats by suburban development. Therefore, development of proper methods of seedling production to increase natural stock became necessity. As parts of achieving this goal, duration from mating to spawning, egg incubation period, and egg development of this species were studied. The influence of temperatures and salinities on the egg incubation and hatching was also investigated. It took 2-8 hours from mating to egg spawning and the spawning lasted 3-9 hours from the first spawning. Egg numbers per female (6cm in carapace length) were 380,000410,000. Optimum temperature for egg incubation was
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