title: Kin assortment in juvenile shoals in wild guppy populations.
abstract: Grouping provides many potential benefits to individuals in terms of foraging and anti-predator protection. However, it has been suggested that individuals could gain additional benefits in terms of indirect fitness by grouping with kin. Surprisingly, the genetic composition of wild fish shoals and the importance of kin-associated shoaling remain poorly understood. The Trinidadian guppy (Poecilia reticulata) has life history traits that might promote kin structure of shoals such as internal fertilisation and small brood size in contrast to many other fish species. Even though previous studies did not find any indication of kin structure in shoals of adult guppies, it is possible that related juveniles remain together in shoals, partly because of lower mobility and because the advantages of kin association may change with age. Using 10 microsatellite markers, we conducted a genetic analysis on 40 shoals from four populations. Pair-wise relatedness was inferred using a modified version of the software package COLONY and permutation tests were conducted to test the hypothesis that kin occur together in juvenile shoals more often than expected by chance. The frequency of sib dyads among juveniles within shoals was significantly larger than that between shoals in two high predation populations but not in two low predation populations. This finding contributes to the understanding of factors underlying shoal composition and highlights the potential of recent methodological advances for detecting such relationships.
authors.affiliation: Department of Biology, Faculty of Science, Mahasarakham University, Mahasarakham, Thailand. chantima.p@msu.ac.th
authors.forename: C
authors.initials: C
authors.lastname: Piyapong
authors.forename: R K
authors.initials: RK
authors.lastname: Butlin
authors.forename: J J
authors.initials: JJ
authors.lastname: Faria
authors.forename: K J
authors.initials: KJ
authors.lastname: Scruton
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.forename: J
authors.initials: J
authors.lastname: Krause
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D019295:Computational Biology; D005787:Gene Frequency; D014644:Genetic Variation; D005828:Genetics, Population; D005838:Genotype; D016013:Likelihood Functions; D018895:Microsatellite Repeats / Q000235:genetics; D011036:Poecilia / Q000235:genetics*; D012919:Social Behavior; D014300:Trinidad and Tobago
references.citation: Biol Lett. 2008 Dec 23;4(6):623-6
references.pmid: 18765351
references.citation: Evolution. 1986 Sep;40(5):1051-1059
references.pmid: 28556214
references.citation: Trends Ecol Evol. 1999 Jul;14(7):253-256
references.pmid: 10370259
references.citation: Genetics. 2004 Apr;166(4):1963-79
references.pmid: 15126412
references.citation: Genetica. 1998 Nov;104(3):295-9
references.pmid: 16220378
references.citation: Evolution. 1989 Jan;43(1):223-225
references.pmid: 28568501
references.citation: Mol Ecol. 2005 Sep;14(10):3133-46
references.pmid: 16101779
references.citation: Genetics. 1999 Aug;152(4):1753-66
references.pmid: 10430599
references.citation: Mol Ecol. 2007 Sep;16(18):3938-46
references.pmid: 17850555
references.citation: Nucleic Acids Res. 1997 Sep 1;25(17):3389-402
references.pmid: 9254694
references.citation: Genetics. 1996 Mar;142(3):1061-4
references.pmid: 8849912
references.citation: J Theor Biol. 1964 Jul;7(1):1-16
references.pmid: 5875341
references.citation: Heredity (Edinb). 2001 Feb;86(Pt 2):213-21
references.pmid: 11380667
references.citation: Bioinformatics. 2004 Jan 22;20(2):289-90
references.pmid: 14734327
references.citation: Evolution. 1996 Aug;50(4):1651-1660
references.pmid: 28565709
references.citation: Bioinformatics. 2012 Oct 1;28(19):2537-9
references.pmid: 22820204
references.citation: Genetics. 2009 Apr;181(4):1579-94
references.pmid: 19221199
references.citation: Proc Biol Sci. 2004 Dec 7;271 Suppl 6:S516-9
references.pmid: 15801620
references.citation: Evolution. 1989 Mar;43(2):258-275
references.pmid: 28568555
references.citation: Nature. 1987 Jan 29-Feb 4;325(6103):433-5
references.pmid: 3808044
references.citation: Evolution. 1992 Oct;46(5):1457-1465
references.pmid: 28568990
references.citation: Biol Rev Camb Philos Soc. 2000 Nov;75(4):477-501
references.pmid: 11117198
references.citation: Behav Processes. 2008 Mar;77(3):384-8
references.pmid: 18061375
references.citation: Genetics. 1997 Apr;145(4):1219-28
references.pmid: 9093870
references.citation: Curr Biol. 2006 Oct 24;16(20):R865-6
references.pmid: 17055965
references.citation: Heredity (Edinb). 2007 Aug;99(2):205-17
references.pmid: 17487215
references.citation: Oecologia. 2003 Sep;137(1):62-8
references.pmid: 12856201
references.citation: Cancer Res. 1967 Feb;27(2):209-20
references.pmid: 6018555
references.citation: Proc Natl Acad Sci U S A. 2007 May 22;104(21):8913-7
references.pmid: 17496139
references.citation: Trends Ecol Evol. 2006 Feb;21(2):57-60
references.pmid: 16701471
references.citation: Evolution. 1980 Jan;34(1):76-91
references.pmid: 28563214