@article{fdi:010048349, title = {{G}enetic relatedness in groups of the humbug damselfish {D}ascyllus aruanus : small, similar-sized individuals may be close kin}, author = {{B}uston, {P}. {M}. and {F}auvelot, {C}{\'e}cile and {W}ong, {M}. {Y}. {L}. and {P}lanes, {S}.}, editor = {}, language = {{ENG}}, abstract = {{K}in selection plays an important role in the evolution of social behaviour in terrestrial systems. {T}he extent to which kin selection influences the evolution of social behaviour in marine systems is largely unexplored. {G}enerally, 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. {H}ere, we challenge this assumption and investigate the opportunity for kin selection in a coral reef fish: the humbug damselfish {D}ascyllus aruanus. {T}his fish lives in groups composed of a large male and a number of smaller females and nonbreeders. {W}e use 10 polymorphic microsatellite loci to assess the relatedness of 265 individuals from 35 groups. {T}he mean coefficient of relatedness among group members is 0.01 +/- 0.04, suggesting that individuals are not associated with close relatives. {H}owever, 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. {F}urther analyses reveal that close relatives likely are similar in size and small in size, suggesting that they might have recruited together. {W}e conclude that it is possible for kin selection to operate in {D}. aruanus, but kin recognition will be a prerequisite for such selection. {T}his 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.}, keywords = {{D}ascyllus aruanus ; kinship ; larval dispersal ; microsatellites ; recruitment ; social evolution ; sweepstakes hypothesis}, booktitle = {}, journal = {{M}olecular {E}cology}, volume = {18}, numero = {22}, pages = {4707--4715}, ISSN = {0962-1083}, year = {2009}, DOI = {10.1111/j.1365-294{X}.2009.04383.x}, URL = {https://www.documentation.ird.fr/hor/fdi:010048349}, }