스텔렛 철갑상어 (Acipenser ruthenus)의 난 발생과 자치어 형태발달 = Morphological Development of Eggs, Larvae and Juveniles of the Sterlet sturgeon, Acipenser ruthenus (Pisces: Acipenseridae)

다국어 초록 (Multilingual Abstract)

To develop cultivation technique for Acipenser ruthenus and secure basic taxonomic materials, this study examined egg development and larva morphological development. This study used a couple of male and female broodstork matured in a PVC circle water tank (Ø 5 m) with the water temperature of 16.0±1.0 ℃ in June 2005. They were oval opaque and sinking cohesive eggs and the sizes of them were between 3.83~3.85 (3.84±0.01) mm (n=10). As for the egg development, the dry process was adopted with artificial insemination in this study, and an hour after the insemination, the embryo disks were developed, 31 hours after the insemination, they reached the end of gastrula stage, and 82 hours (50%) after the insemination, they were hatched. Right after the hatch, the total lengths of larvae were 10.1~10.3 (10.2±0.11) mm (n=10) with big yolks in the venter. 17 days after the hatch, the total lengths of them were 26.2~32.4 (29.3±4.39) mm (n=10) and in the front of a dorsal fin there were 11 scute scales that started to make tracing development. As 50 days after the hatch, the total lengths were 86.4~93.1 (89.8±4.71) mm (n=10), and fin rays all reached integer, they were moved to the larva apparatus.

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