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Titre du document / Document title

Mate choice in the galilee St. Peter's fish, Sarotherodon galilaeus

Auteur(s) / Author(s)

ROS Albert F. H. (1) ; ZEILSTRA Ilja (1) ; OLIVEIRA Rui F. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Unidade de Investigação em Eco-Etologia, Instituto Superior de Psicologia Aplicada, Rua Jardim do Tabaco 34, 1149-041, Lisboa, PORTUGAL

Résumé / Abstract

This study reveals the correlation between operational sex ratio (OSR), body characteristics and pairing in one-year-old reproductively active St. Peter's fish, 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 fish 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 benefits for reproductive success in S. galilaeus.

Revue / Journal Title

Behaviour    ISSN  0005-7959   CODEN BEHAA8 

Source / Source

2003, vol. 140 (8-9), pp. 1173-1188 [16 page(s) (article)] (1 p.3/4)

Langue / Language

Anglais

Editeur / Publisher

Brill, Leiden, PAYS-BAS  (1948) (Revue)

Mots-clés anglais / English Keywords

Breeding behavior

;

Vertebrata

;

Aquatic environment

;

Secondary sexual character

;

Laboratory study

;

Pisces

;

Breeding success

;

Body size

;

Polygamy

;

Monogamy

;

Mating system

;

Sex ratio

;

Sexual behavior

;

Mate selection

;

Mots-clés français / French Keywords

Comportement reproducteur

;

Vertebrata

;

Sarotherodon galilaeus

;

Milieu aquatique

;

Caractère sexuel secondaire

;

Etude en laboratoire

;

Pisces

;

Succès reproducteur

;

Taille corporelle

;

Polygamie

;

Monogamie

;

Système croisement

;

Sex ratio

;

Comportement sexuel

;

Choix partenaire

;

Mots-clés espagnols / Spanish Keywords

Conducta reproductora

;

Vertebrata

;

Medio acuático

;

Carácter sexual secundario

;

Estudio en laboratorio

;

Pisces

;

Exito reproductor

;

Talla corporal

;

Poligamia

;

Monogamia

;

Sistema cruzamiento

;

Proporción de sexos

;

Conducta sexual

;

Selección pareja

;

Localisation / Location

INIST-CNRS, Cote INIST : 5328, 35400011624559.0110

Nº notice refdoc (ud4) : 15368660



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