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Annual cycle of the testis in the swamp eel, Synbranchus marmoratus (Teleostei, Synbranchidae), a protogynic, diandric fish
Lo Nostro, F.; Andreone, L.; Guerrero, G.A.; Grier, H. (2000). Annual cycle of the testis in the swamp eel, Synbranchus marmoratus (Teleostei, Synbranchidae), a protogynic, diandric fish, 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. 254
In: Norberg, B. et al. (Ed.) (2000). Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. Department of Fisheries and Marine Biology, University of Bergen: Bergen. ISBN 82-7461-048-2. 499 pp., more
In: International Symposium on the Reproductive Physiology of Fish. Museo Nacional de Ciencias Naturales, more

Available in Authors 
    VLIZ: Proceedings [4229]

Keyword
    Marine

Authors  Top 
  • Lo Nostro, F.
  • Andreone, L.
  • Guerrero, G.A.
  • Grier, H.

Abstract
    Annual breeding seasons and the cycle of spermatogenesis varies between teleost species. Recently, five reproductive classes were described in a perciform fish, Centropomus undecimalis, based upon histological changes observed in the germinal epithelium of the testis. S. marmoratus, like perciform teleosts, has a lobular unrestricted testes type, but it is also a protogynic, diandric fresh water fish. As in Monopterus albus, hermaphroditism is sequential, and constitutes natural sex reversal. This work describes the annual reproductive cycle in S. marmoratus (Corrientes Province, 27 degree 25'S; 58 degree 15'W, Argentina) using light and electron microscopy procedures

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