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Features of oogenesis and spermatozoa ultrastructure in the fishes of the genera Parascorpaena and Scorpaenopsis (Scorpaenidae)статья
Дата последнего поиска статьи во внешних источниках: 26 января 2022 г.
- Авторы: Emel’yanova N.G., Pavlov D.A.
- Журнал: Journal of Ichthyology
- Том: 61
- Номер: 6
- Год издания: 2021
- Издательство: Pleiades Publishing, Inc.
- Местоположение издательства: New York, USA
- Первая страница: 893
- Последняя страница: 903
- DOI: 10.1134/S0032945221050040
- Аннотация: Oocyte morphology and spermatozoa ultrastructure are studied in the representatives of the generaParascorpaena and Scorpaenopsis. Oocytes of P. aurita and S. cirrosa are attached to peduncles originatedfrom ovigerous stroma located in the central part of the ovary. Oocyte diameter at the final phases of vitellogenesis is 450 and 500 μm, respectively. The oogenesis is asynchronous and continuous. Spermatozoa of fourspecies (P. aurita, P. mossambica, S. cirrosa, and S. diabolus) possess similar morphology: spermatozoon headwidth is slightly larger than its length. The genera Parascorpaena (three species) and Scorpaenopsis (four species) differ in three from four indices designating spermatozoon head and midpiece shapes, size of nuclearfossa in the spermatozoon nucleus base (20–25 vs. 0–12% of head length), and relative location of proximaland distal centrioles (coaxial and orthogonal, respectively). The irregular shape of the nuclear fossa in thespermatozoon nucleus base of P. aurita can be interpreted as apomorphy.
- Добавил в систему: Павлов Дмитрий Александрович