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Titolo:
Group founding and breeding structure in the subsocial spider Stegodyphus lineatus (Eresidae)
Autore:
Johannesen, J; Lubin, Y;
Indirizzi:
Univ Mainz, Abt Okol, Inst Zool, D-55099 Mainz, Germany Univ Mainz MainzGermany D-55099 Okol, Inst Zool, D-55099 Mainz, Germany Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Mitrani Dept Desert Ecol, IL-84990 Sede Boqer, Israel Ben Gurion Univ Negev Sede Boqer Israel IL-84990 4990 Sede Boqer, Israel
Titolo Testata:
HEREDITY
, volume: 82, anno: 1999,
parte:, 6
pagine: 677 - 686
SICI:
0018-067X(199906)82:<677:GFABSI>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOCIAL SPIDER; POPULATION-STRUCTURE; GENE DIVERSITY; INTERDEMIC SELECTION; COOPERATIVE SPIDER; F-STATISTICS; FREQUENCIES; RELATEDNESS; FLOW;
Keywords:
allozymes; mating dispersal; philopatry; population genetics; relatedness; sib-groups;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Johannesen, J Univ Mainz, Abt Okol, Inst Zool, Saarstr 21, D-55099 Mainz, Germany Univ Mainz Saarstr 21 Mainz Germany D-55099 Mainz, Germany
Citazione:
J. Johannesen e Y. Lubin, "Group founding and breeding structure in the subsocial spider Stegodyphus lineatus (Eresidae)", HEREDITY, 82, 1999, pp. 677-686

Abstract

Go-operative behaviour may evolve by enhancing the genetic similarity of group members. Increased group similarity is thought to be the basis for the'subsocial route' of social evolution in the spider family Eresidae. Two processes may promote the similarity of individuals within populations or breeding: groups, namely philopatry in stable environments and founder eventsin a stochastic environment. We show that both processes led to genetic differentiation within and among populations of the subsocial spider Stegodyphus lineatus. Within populations we distinguished between the genetic structure caused by random mating and philopatry in old breeding groups and thatcaused by newly founded groups consisting of sibs. Such sib-groups suggestthat new breeding groups are established primarily by single females. The different gene coancestries among breeding groups resulted in high variances among single-locus data. The results imply that sex-specific dispersal behaviour (random male mating-dispersal or female group founding) had different impacts on the population structure. This type of population structure, where within-population philopatry and founder events may lead to differential proliferation of breeding groups, is very similar to that presumed for social spiders, and is also one that could provide the conditions for interdemic selection.

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Documento generato il 02/12/20 alle ore 17:16:46