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Pseudomale Behaviour and Spontaneous Masculinization in the All-Female Teleost Poecilia Formosa (Teleostei: Poeciliidae)

In: Behaviour
Authors:
Ingo Schlupp Zoologisches Institut und Zoologisches Museum der Universität Hamburg, Martin-Luther-King Platz 3, D-2000 Hamburg 13, F.R.G.

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Jakob Parzefall Zoologisches Institut und Zoologisches Museum der Universität Hamburg, Martin-Luther-King Platz 3, D-2000 Hamburg 13, F.R.G.

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JÖRG T. Epplen Max-Planck-Institut für Psychiatrie, Am Klopferspitz 18a, D-8033 Martinsried, F.R.G.

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Indrajit Nanda Institut für Humangenetik der Univer-sität, Koellikerstrasse 2, D-8700 Würzburg, F.R.G.

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Michael Schmid Institut für Humangenetik der Univer-sität, Koellikerstrasse 2, D-8700 Würzburg, F.R.G.

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Manfred Schartl Genzentrum, Max-Planck-Institut für Biochemie, Am Klopferspitz 18a, D-8033 Martinsried, F.R.G.

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Online Publication Date:
01 Jan 1992
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Abstract

Pseudosexual behaviour is a rare phenomenon associated with unisexuality in vertebrates. In the gynogenetic, all-female teleost Poecilia formosa, rare individuals occur that resemble males of closely related gonochoristic species both in behaviour and external morphology. These masculinized gynogens and normal gynogens are members of the same clone, as demonstrated by DNA-fingerprinting. The behaviour of these masculinized gynogens is described and compared to the behaviour of the gonochoristic species Poecilia mexicana, P. latipinna and their hybrid as well as androgen-treated individuals of P. formosa. No statistically significant differences were found between masculinized gynogens and hormone-treated individuals nor between the gonochoristic P. mexicana and P. latipinna males. Differences exist between gonochoristic and unisexual species. Possible causes and effects of masculinized gynogens are discussed.

Title:
Pseudomale Behaviour and Spontaneous Masculinization in the All-Female Teleost Poecilia Formosa (Teleostei: Poeciliidae)
Article Type:
Research Article
DOI:
https://doi.org/10.1163/156853992X00327
Language:
English
Pages:
88–104
In:
Behaviour
In:
Volume 122: Issue 1-2
Publisher:
Brill
E-ISSN:
1568-539X
Print ISSN:
0005-7959
Subjects:
Biology & Environmental Sciences, Biology

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