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Differences in thermal tolerance in coexisting sexual and asexual mollies (Poecilia, Poeciliidae, Teleostei)
Author(s) -
Fischer C.,
Schlupp I.
Publication year - 2009
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2009.02214.x
Subject(s) - poecilia , poeciliidae , biology , zoology , population , teleostei , ecology , fishery , fish <actinopterygii> , demography , sociology
This study reports significant differences between the gynogenetic Amazon molly Poecilia formosa and one of its sperm hosts, and the sexual sailfin molly Poecilia latipinna in the critical temperatures at which individual fishes lost motion control. Based on these measurements, it is suggested that cold snaps occurring in winter, but not summer temperatures, can significantly change population composition of these closely related fishes by inflicting higher mortality on P. formosa .