Offspring number in a livebearing fish (Poecilia mexicana, Poeciliidae): reduced fecundity and reduced plasticity in a population of cave mollies

Riesch, R; Tobler, M; Plath, M; Schlupp, I

doi:10.1007/s10641-008-9392-0

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Riesch, R., Tobler, M., Plath, M., & Schlupp, I. (2009). Offspring number in a livebearing fish (Poecilia mexicana, Poeciliidae): reduced fecundity and reduced plasticity in a population of cave mollies. Environmental Biology of Fishes, 84(1), 89–94. https://doi.org/10.1007/s10641-008-9392-0

Abstract

Life history traits within species often vary among different habitats.We measured female fecundity in mollies (Poecilia mexicana) from a H2S-rich cave and from a neighbouring surface habitat, as well as in laboratory-reared individuals of both populations raised in either light or continuous darkness. Compared to conspecifics from surface habitats, cave-dwelling P.mexicana had reduced fecundity (adjusted for size) in the field. In the laboratory, the fecundity of surface mollies was higher in light than in darkness, whereas fecundit