Condition and reproductive investment in the western mosquitofish (Gambusia affinis): little evidence for condition-dependent sex-biased investment

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Condition and reproductive investment in the western mosquitofish (Gambusia affinis) : little evidence for condition-dependent sex-biased investment. / Senior, Alistair M.; Lim, Jiahui N.; Adolfsson, Sofia; Lamatsch, Dunja K.; Nakagawa, Shinichi.

I: Biological Journal of the Linnean Society, Vol. 119, Nr. 2, 01.10.2016, s. 430-435.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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TY - JOUR

T1 - Condition and reproductive investment in the western mosquitofish (Gambusia affinis)

T2 - Biological Journal of the Linnean Society

AU - Senior, Alistair M.

AU - Lim, Jiahui N.

AU - Adolfsson, Sofia

AU - Lamatsch, Dunja K.

AU - Nakagawa, Shinichi

PY - 2016/10/1

Y1 - 2016/10/1

N2 - In sexually reproducing species, resources may theoretically be distributed with bias to the production of male or female offspring in response to the condition of the mother, commonly recognized as sex allocation. Using a recently characterized sex-specific molecular marker, we tested for maternal sex allocation (i.e. maternal primary sex ratio bias and sex-specific offspring investment) in captive laboratory-bred western mosquitofish (Gambusia affinis) at early stages of offspring development. We found no statistical evidence to support sex allocation in G. affinis, based on maternal condition. In addition, we found little evidence for correlations between maternal condition and investment in the condition (mass) of individual offspring (of one sex or the other), although we did find that larger mothers tended to have higher fecundity.

AB - In sexually reproducing species, resources may theoretically be distributed with bias to the production of male or female offspring in response to the condition of the mother, commonly recognized as sex allocation. Using a recently characterized sex-specific molecular marker, we tested for maternal sex allocation (i.e. maternal primary sex ratio bias and sex-specific offspring investment) in captive laboratory-bred western mosquitofish (Gambusia affinis) at early stages of offspring development. We found no statistical evidence to support sex allocation in G. affinis, based on maternal condition. In addition, we found little evidence for correlations between maternal condition and investment in the condition (mass) of individual offspring (of one sex or the other), although we did find that larger mothers tended to have higher fecundity.

KW - fecundity

KW - life-history trade-off

KW - maternal condition

KW - maternal investment

KW - offspring size

KW - Poeciliid

KW - reproductive correlations

KW - sex allocation

KW - sex ratio

KW - Trivers–Willard

UR - http://www.scopus.com/inward/record.url?scp=84988622188&partnerID=8YFLogxK

U2 - 10.1111/bij.12813

DO - 10.1111/bij.12813

M3 - Article

VL - 119

SP - 430

EP - 435

JO - Biological Journal of the Linnean Society

JF - Biological Journal of the Linnean Society

SN - 0024-4066

IS - 2

ER -