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Hermaphroditism in the Mesopelagic Fishes Omosudis lowei and Alepisaurus ferox

C. Lavett Smith and Ethel H. Atz
Copeia
Vol. 1973, No. 1 (Mar. 5, 1973), pp. 41-44
DOI: 10.2307/1442355
Stable URL: http://www.jstor.org/stable/1442355
Page Count: 4
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Hermaphroditism in the Mesopelagic Fishes Omosudis lowei and Alepisaurus ferox
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Abstract

The iniomous fishes Omosudis lowei and Alepisaurus ferox are synchronous hermaphrodites in which the testicular part of the gonad is separated from the ovarian region and lies dorsal to it. Serial sections show that there are two sperm ducts which remain separated from each other and from the oviduct and that each of these exits externally, one on each side of the urethra. The fact that the dorsal testis is common to all of the hermaphroditic inioms thus far studied and would appear to be more easily derived from the gonochoristic state, supports our previous suggestion that the dorsal location of the testicular region is a more primitive condition than that of most hermaphroditic perciform fishes in which the testis is ventrally placed.

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