The Korean Journal of Malacology (한국패류학회지)
- Volume 22 Issue 1 Serial No. 35
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- Pages.39-49
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- 2006
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- 1225-3480(pISSN)
Ultrastructure of Germ Cell during Spermatogenesis and the Reproductive Cycle of the Hanging Cultured Male Scallop Patinopecten yessoensis (Pelecypoda:Pectinidae) on the East Coast of Korea
- Park, Young-Je (West Sea Fisheries Research Institute, National Fisheries Research and Development Institute) ;
- Chung, Ee-Yung (School of Marine Life Science, Kunsan National University) ;
- Lee, Jeong-Yong (Research Planning Department, National Fisheries Research and Development Institute) ;
- Park, Kwang-Jae (West Sea Fisheries Research Institute, National Fisheries Research and Development Institute)
- Published : 2006.06.30
Abstract
Ultrastructure of germ cell differentiation during supermatogenesis and the reproductive cycle in male Patinopecten yessoensis was studied by histological and cytological observations. The gonadosomatic index (GSI) in males rapidly increased and reached a maximum in April when seawater temperature gradually increased. Then the GSI gradually decreased from May through July when spawning occurred. Accordingly, monthly changes in the GSI in males coincided with testicular maturation and spawning periods. The sperm morphology of P. yessoensis belongs to the primitive type and showed general characteristics of external fertilization species. The head of the spermatozoon is approximately