Agelenids of the World

Systematics and Taxonomy of Agelenidae, a Worldwide distributed Spider Family

Barriere ethologique et complementarite des signaux chez deux especes sympatriques de tegenaires (Araneae, Agelenidae)

Publication Type:Journal Article
Year of Publication:1986
Authors:P. Boulanger, Leborgne, R., Kraft, B.
Journal:Biology of Behaviour
Date Published:1986
ISBN Number:0397-7153
Keywords:[Tactile signals / / significance for reproductive isolation] [Webs /, / Tactile courtship signals, Animal constructions, Behaviour, Communication, courtship behaviour & tactile signals significance], Ecology, Evolution, Reproduction, reproductive, Reproductive behaviour, reproductive isolation significance]., Speciation, Tegenaria domestica, Tegenaria domestica (Araneae)., Tegenaria pagana (Araneae)., Tegenaria pagana [Courtship / / Tactile signals, use & reproductive isolation significance] [Evolutionary isolation / /

The aim of this paper was to study behavioural factors which can intervene in the reproductive isolation of the two sympatric species Tegenaria domestica and Tegenaria pagana, which are very close in systematic and present few morphological differences. In particular, we studied the modalities of the expression of courtship behavior. The behaviours were observed and the vibratory signals were recorded and analysed. The results show that it is possible to easily differentiate the two species. Indeed, male "motifs" of T. domestica are relatively simple and discreet, while those of male of T. pagana are more complex, with many acts' units performed repetitively. Adult males of the two species were tested on conspecific or heterospecific webs in the presence or absence of an adult female. On conspecific web, male courtship (in both species) can be diplayed in the absence of the female. On heterospecific web, with or without a female, courships are scarce for the two species. However, female of T. domestica show a particular vibration of their first legs, which could facilitate the release of courtship even on the web of T. pagan. These results corroborate the importance of silk structures as a means of communication which can participate in specific sexual recognition and in courtship.

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