Agelenids of the World

Systematics and Taxonomy of Agelenidae, a Worldwide distributed Spider Family

Male emergence timing and mating success in the funnel-web spider, Agelena limbata (Araneae: Agelenidae)

Publication Type:Journal Article
Year of Publication:1994
Authors:T. Masumoto
Journal:Ecological Research
Date Published:1994
ISBN Number:0912-3814
Keywords:adaptive significance] [Hatching / / Male emergence timing, Agelena limbata (Araneae)., Agelena limbata [Mating / / Male mating success, Asia, Development, emergence timing, Eurasia, Evolution, Kyushu, Land zones, Life cycle and development, Male emergence timing & mating success]., mating success relations] [Evolutionary adaptation / / ] [Japan / /, Palaearctic region, relations, Reproduction, Reproductive behaviour

Field observations on the relationship between male mating success and emergence timing in the funnel-web spider, Agelena limbata, were conducted. Agelena limbata is an annual species and adult males appear slightly earlier than adult females in July. As males deposit a copulatory plug at the female epigynum after copulation, copulation with virgin females is important to males. The number of copulations in males with virgin females, which strongly correlates with the longevity of males and the number of females that males courted, did not correlate with the emergence timing of males. Early emerged males and females were significantly larger in size than later ones, but the correlation coefficient between the emerged date and the cephalothorax width was not strong. Males that emerged earlier did not have any advantage in copulating with larger and more fecund females. Furthermore, virgin females first copulated on average 7.9 days after their final molt and the mortality rate of adult males increased after the final molt. These factors may favor the smaller degree of protandry in male emergence timing in A. limbata.

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith