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Mate Choice in the Galilee St. Peter's Fish, Sarotherodon galilaeus

Mate Choice in the Galilee St. Peter's Fish, Sarotherodon galilaeus MATE CHOICE IN THE GALILEE ST. PETER’S FISH, SAROTHERODON GALILAEUS by ALBERT F.H. ROS , ILJA ZEILSTRA and RUI F. OLIVEIRA 1) (Unidade de Investigação em Eco-Etologia, Instituto Superior de Psicologia Aplicada, Rua Jardim do Tabaco 34, 1149-041, Lisboa, Portugal) (Acc. 7-VIII-2003) Summary This study reveals the correlation between operational sex ratio (OSR), body characteristics and pairing in one-year-old reproductively active St. Peter’s Ž sh, Sarotherodon galilaeus , a mouth brooding tilapia that shows a wide variety in mating strategies including uni- vs biparental brood care, and monogamy vs polygamy. In this study individually marked Ž sh were exposed to different OSR regimes: male-biased, balanced, and female-biased. Larger individuals formed a pair more rapidly than smaller ones. A bias in the OSR caused a longer delay in pairing for individuals of the more abundant sex. The same patterns were found in males and females, supporting the theory that assortative mating patterns emerge due to both male and female choice. Furthermore, we found that pairs that spawned during the experiment were more closely matched in body size than pairs that were not successful in spawning, suggesting that size assortative mating has beneŽ ts for reproductive success in S. galilaeus . http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

Mate Choice in the Galilee St. Peter's Fish, Sarotherodon galilaeus

Ros, Albert; Zeilstra, Ilja; Oliveira, Rui
Behaviour , Volume 140 (8-9): 16 – Jan 1, 2003
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References (26)

Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0005-7959
eISSN
1568-539X
DOI
10.1163/156853903322589696
Publisher site
See Article on Publisher Site

Abstract

MATE CHOICE IN THE GALILEE ST. PETER’S FISH, SAROTHERODON GALILAEUS by ALBERT F.H. ROS , ILJA ZEILSTRA and RUI F. OLIVEIRA 1) (Unidade de Investigação em Eco-Etologia, Instituto Superior de Psicologia Aplicada, Rua Jardim do Tabaco 34, 1149-041, Lisboa, Portugal) (Acc. 7-VIII-2003) Summary This study reveals the correlation between operational sex ratio (OSR), body characteristics and pairing in one-year-old reproductively active St. Peter’s Ž sh, Sarotherodon galilaeus , a mouth brooding tilapia that shows a wide variety in mating strategies including uni- vs biparental brood care, and monogamy vs polygamy. In this study individually marked Ž sh were exposed to different OSR regimes: male-biased, balanced, and female-biased. Larger individuals formed a pair more rapidly than smaller ones. A bias in the OSR caused a longer delay in pairing for individuals of the more abundant sex. The same patterns were found in males and females, supporting the theory that assortative mating patterns emerge due to both male and female choice. Furthermore, we found that pairs that spawned during the experiment were more closely matched in body size than pairs that were not successful in spawning, suggesting that size assortative mating has beneŽ ts for reproductive success in S. galilaeus .

Journal

Behaviour – Brill

Published: Jan 1, 2003

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