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Gonad cytomorphology in the life cycle of chum salmon (Oncorhynchus keta)
Mikodina, E.V.; Klovach, N.V.; Pukova, N.V. (2000). Gonad cytomorphology in the life cycle of chum salmon (Oncorhynchus keta), in: Norberg, B. et al. (Ed.) Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. pp. 110
In: Norberg, B. et al. (2000). Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. International Symposium on the Reproductive Physiology of Fish, 6. Department of Fisheries and Marine Biology, University of Bergen: Bergen. ISBN 82-7461-048-2. 499 pp., meer
In: International Symposium on the Reproductive Physiology of Fish. Museo Nacional de Ciencias Naturales. , meer
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  • Mikodina, E.V.
  • Klovach, N.V.
  • Pukova, N.V.
Abstract
    Chum salmon fry were taken and studied after their downstream migration to the estuaries. The testis was found to consist of mitotic spermatogonia (Ist maturity stage) and the ovary of cytoplasmatic oocytes at 1 and 2 developmental steps (IInd stage). During the oceanic life period gonads were examined in fish up to 4 years old. The final oogenesis period (completion of maturation) was observed in oceanic females. Males from the Sakhalin rivers showed examples of gonadal abnormalities.
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