共存的有性和无性鳉鱼（Poecilia, Poeciliidae, Teleostei）在热耐受性方面的差异。

Differences in thermal tolerance in coexisting sexual and asexual mollies (Poecilia, Poeciliidae, Teleostei).

机构信息

Systematics and Evolutionary Biology, Institute of Biology and Environmental Sciences, University of Oldenburg, Carl von Ossietzky-Str. 9-11, 26129 Oldenburg, Germany.

出版信息

J Fish Biol. 2009 May;74(7):1662-8. doi: 10.1111/j.1095-8649.2009.02214.x.

DOI:10.1111/j.1095-8649.2009.02214.x

PMID:20735663

Abstract

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.

摘要

本研究报告了雌核发育的亚马逊神仙鱼（Poecilia formosa）与其精子宿主之一、性别的帆鳍神仙鱼（Poecilia latipinna）之间的显著差异，以及个体鱼类失去运动控制能力的临界温度。基于这些测量结果，建议冬季出现的寒潮，而不是夏季温度，通过对 P. formosa 造成更高的死亡率，从而显著改变这些密切相关鱼类的种群组成。