Female receptivity and male mate-guarding in the jewel spiderGasteracantha minax thorell (Araneidae)

Autor:	Mark A. Elgar, Rachael Bathgate
Rok vydání:	1996
Předmět:	Ecology media_common.quotation_subject Zoology Context (language use) Biology Intraspecific competition Competition (biology) Sexual dimorphism Animal ecology Insect Science Sexual cannibalism Mating Sperm competition Ecology Evolution Behavior and Systematics media_common
Zdroj:	Journal of Insect Behavior. 9:729-738
ISSN:	1572-8889 0892-7553
DOI:	10.1007/bf02213553
Popis:	In field populations, several male jewel spidersGasteracantha minax Thorell (Araneidae) may be found at the periphery of the orb web of a female, indicating that males may compete for fertilisation success. Laboratory experiments revealed that virgin femaleG. minax readily remate shortly after their first mating. However, they appear to enter a refractory period between 1 and 24 h postmating and respond aggressively to courting males. Males that have mated with a female initially defend her from rival males but cease to do so after the onset of the refractory period. These data can be interpreted within the context of mate-guarding and sperm competition. There is marked size dimorphism in this species, which may be the result of selection for protandry. In contrast with other orb-weaving spiders, this selection pressure does not seem to be counterbalanced by selection for larger male size through either sexual cannibalism or male-male competition.
Databáze:	OpenAIRE
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