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Titre du document / Document title

Sexual conflict and mating systems in the dorvilleid genus Ophryotrocha and the dinophilid genus Dinophilus

Auteur(s) / Author(s)

SELLA G. (1) ; RAMELLA L. (1) ;

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

(1) Department of Animal Biology, via Accademia Albertina 17, University of Turin, 10123 Turin, ITALIE

Résumé / Abstract

Predictions of mating system and sexual conflict theory are applied to mating systems of the best studied among the simultaneously hermaphroditic, sequentially hermaphroditic and gonochoric species of the dorvilleid genus Ophryotrocha and of two species of dinophilids. In the hermaphroditic Ophryotrocha species, the mating system is characterized by pair mating, absence of sperm competition and exchange of sexual roles between partners (egg trading). Features that stabilize the pair bond are analyzed (i.e. breeding sex-ratio, biparental care, mechanisms against cheating). Male-male competition and female preference for small males differentiate the mating system of a sequentially hermaphroditic species from that of a gonochoric species, where females prefer large males as mates. In the gonochoric species of Dinophilus different population structures (either panmictic or with sib-mating) select either for absence of sexual dimorphism and a 1: 1 sex ratio or for strong sexual dimorphism and female biased sex ratio.

Revue / Journal Title

Hydrobiologia    ISSN  0018-8158   CODEN HYDRB8 

Source / Source

1999, vol. 402 (321 p.)  (1 p.1/2), pp. 203-213

Langue / Language

Anglais

Editeur / Publisher

Springer, Dordrecht, PAYS-BAS  (1948) (Revue)

Mots-clés anglais / English Keywords

Mating system

;

Sexual competition

;

Body size

;

Hermaphroditism

;

Interspecific comparison

;

Reproduction

;

Aquatic environment

;

Polychaeta

;

Annelida

;

Invertebrata

;

Mots-clés français / French Keywords

Système croisement

;

Compétition sexuelle

;

Taille corporelle

;

Hermaphrodisme

;

Comparaison interspécifique

;

Dinophilus

;

Ophryotrocha

;

Reproduction

;

Milieu aquatique

;

Polychaeta

;

Annelida

;

Invertebrata

;

Mots-clés espagnols / Spanish Keywords

Sistema cruzamiento

;

Competencia sexual

;

Talla corporal

;

Hermafroditismo

;

Comparación interespecífica

;

Reproducción

;

Medio acuático

;

Polychaeta

;

Annelida

;

Invertebrata

;

Localisation / Location

INIST-CNRS, Cote INIST : 5329, 35400008117047.0110

Nº notice refdoc (ud4) : 1234681



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