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Fish Reproduction - Anatomy & Physiology (view source)
Revision as of 08:28, 1 August 2008
, 08:28, 1 August 2008→Male
= Male =
= Male =
== Testes ==
* Most species have paired, intra-abdominal testes.
* Most species have paired, intra-abdominal testes.
** May be partially or totally fused.
* Suspended by a mesentery from the dorsal abdominal wall adjacent to the swim bladder.
* May be partially or totally fused.
* Vary greatly in size with age and season.
* Lie within a thin tunica albuginea.
* Made up of a series of semniferous tubules or blind-ending sacs, lined with spermatogenic epithelium either along their whole length (salmonids and cypprinids) or only at their distal ends.
* Caudal section of the testes in ictulurids and some cyprinids is lined with non-germinal secretory epithelial cells.
** May be involved in sperm storage, nutrition or may contribute to the ejaculate.
* Testicular duct is present except in Salmonids.
* Testicular duct is present except in Salmonids.
* No epididymis or ductus deferens present in Salmonids
* Spermatozoa released into the body cavity before leaving via the genital opening.
* Interstitial fibrous tissue contains hormone secreting cells (analagous to Leydig cells of mammals).
* No lymphatics of the type seen in mammals.
= Female =
= Female =