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http://dx.doi.org/10.23005/KSMLS.2021.6.1.23

Microstructural Differentiation of Sperm in the Abalone Haliotis discus hannai (Gastropoda: Haliotidae)  

Kim, Hyejin (Fisheries Seed and Breeding Research Institute, National Institute of Fisheries Science)
Kim, Hyeon Jin (Department of Aqualife Medicine, Chonnam National University)
Shin, So Ryung (Department of Aqualife Medicine, Chonnam National University)
Baek, Eun Ran (Department of Aqualife Medicine, Chonnam National University)
Lee, Jung Sick (Department of Aqualife Medicine, Chonnam National University)
Publication Information
Journal of Marine Life Science / v.6, no.1, 2021 , pp. 23-30 More about this Journal
Abstract
The differentiation process of male germ cells and sperm morphology of the abalone Haliotis discus hannai were described in ultrastructure. The differentiation process of sperm was divided into four stages: spermatogonium, spermatocyte, spermatid and sperm. The process of differentiation from spermatogonium to spermatocyte did not show significant morphological changes. However, during the spermiogenesis there were distinct morphological changes such as chromatin condensation, morphological changes of the nucleus, and formation of acrosome, midpiece and flagellum. The sperm of the abalone consisted of head, midpiece and tail. The head of approximately 5.3 ㎛ in length was composed of a nucleus of high electron dense and bullet-shaped acrosome. The midpiece was composed of the basal body and mitochondria, and five mitochondria were arranged in single layer around the basal body. The cross section of the tail showed a "9+2" axonemal structure. These morphological and structural features are the result of showing that the sperm of H. discus hannai is a primitive type.
Keywords
Haliotis discus hannai; Sperm; Microstructural differentiation;
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