Hermaphroditism in a teleost, Polynemus heptadactylus Cuv. and Val.

Kagwade, P V (1967) Hermaphroditism in a teleost, Polynemus heptadactylus Cuv. and Val. Indian Journal of Fisheries, 14 (1&2). pp. 187-197.


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In fishes reproduction is normally sexual by fertilization of male and female reproductive elements borne by individuals of the two separate sexes. However, certain reproductive specializations, viz. gynogenesis, parthenogenesis and hermaphroditism are at times met with. Gynogenesis is observed in Mollienesia formosa (Hubbs and Hubbs, 1932, 1946) which exclusively occurs as females, wherein during reproduction the sperms of a related species only stimulate the eggs but do not contribute to any genetic material and the resulting offspring are all females. Gynogenesis has also been observed in a cyprinid fish Carassius auratus gibelio (Lieder, 1955). Parthenogenesis or development of eggs without fertilization is very rare.

Item Type: Article
Uncontrolled Keywords: Hermaphroditism; Polynemus heptadactylus
Subjects: Fish and Fisheries > Fish biology
Divisions: CMFRI-Cochin > Marine Capture > Demersal Fisheries
Depositing User: Dr. V Mohan
Date Deposited: 11 Aug 2010 05:24
Last Modified: 09 Sep 2015 15:16
URI: http://eprints.cmfri.org.in/id/eprint/2281

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