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Reproductive compensation in broad-nosed pipefish females

Artikel i vetenskaplig tidskrift
Författare Ines Goncalves
K.B. Mobley
I Ahnesjö
Gry Sagebakken
Adam G Jones
Charlotta Kvarnemo
Publicerad i Proceedings of the Royal Society B
Volym 277
Sidor 1581-1589
ISSN 0962-8452
Publiceringsår 2010
Publicerad vid Zoologiska institutionen, ekologisk zoologi
Sidor 1581-1589
Språk en
Länkar dx.doi.org/10.1098/rspb.2009.2290
Ämnesord Syngnathidae; sex-role reversal; paternal care; female choice; maternal effects;
Ämneskategorier Biologiska vetenskaper, Etologi och beteendeekologi

Sammanfattning

The differential allocation hypothesis assumes that animals should weigh costs and benefits of investing into reproduction with a current mate against the expected quality of future mates, and predicts that they should invest more into reproduction when pairing with a high-quality mate. In the broad-nosed pipefish (Syngnathus typhle), males care for the embryos in a brood pouch and females compete for access to male mating partners. Both sexes prefer mating with large partners. In the present study, we show that the same female provides both large and small mating partners with eggs of similar size, weight and lipid content when mated to two males in succession. Importantly, however, eggs provided to small males (less preferred) had higher egg protein content (11% more) than those provided to large males (preferred). Thus, contrary to the differential allocation hypothesis, eggs did not contain more resources when females mated with a larger male. Instead, the pattern observed in our results is consistent with a compensatory reproductive strategy.

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