Genetic relatedness in groups of the humbug damselfish Dascyllus aruanus: small, similar-sized individuals may be close kin - IRD - Institut de recherche pour le développement Access content directly
Journal Articles Molecular Ecology Year : 2009

Genetic relatedness in groups of the humbug damselfish Dascyllus aruanus: small, similar-sized individuals may be close kin

Peter M Buston
  • Function : Author
  • PersonId : 1084758
Marian y L Wong
  • Function : Author
Serge Planes

Abstract

Kin selection plays an important role in the evolution of social behaviour in terrestrial systems. The extent to which kin selection influences the evolution of social behaviour in marine systems is largely unexplored. Generally, it is considered that kin selection is irrelevant in marine systems, because it is assumed that the dispersing larval phase of marine organisms will break up kin associations. Here, we challenge this assumption and investigate the opportunity for kin selection in a coral reef fish: the humbug damselfish Dascyllus aruanus. This fish lives in groups composed of a large male and a number of smaller females and nonbreeders. We use 10 polymorphic microsatellite loci to assess the relatedness of 265 individuals from 35 groups. The mean coefficient of relatedness among group members is 0.01 ± 0.04, suggesting that individuals are not associated with close relatives. However, the distribution of pairwise relatedness of individuals within groups has an overabundance of positive values, and indicates that there might be 35 pairs of close relatives within groups. Further analyses reveal that close relatives likely are similar in size and small in size, suggesting that they might have recruited together. We conclude that it is possible for kin selection to operate in D. aruanus, but kin recognition will be a prerequisite for such selection. This study reveals that individuals can be associated with close relatives, and there is a hidden potential for kin selection, during certain parts of the life cycle of coral reef fishes.

Dates and versions

ird-03044326 , version 1 (17-07-2023)

Identifiers

Cite

Peter M Buston, Cécile Fauvelot, Marian y L Wong, Serge Planes. Genetic relatedness in groups of the humbug damselfish Dascyllus aruanus: small, similar-sized individuals may be close kin. Molecular Ecology, 2009, 18, pp.4707 - 4715. ⟨10.1111/j.1365-294x.2009.04383.x⟩. ⟨ird-03044326⟩

Collections

IRD CNRS
22 View
3 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More