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פותח על ידי קלירמאש פתרונות בע"מ -
Limited mating opportunities and male monogamy: a field study of white widow spiders, Latrodectus pallidus (Theridiidae)
Year:
2006
Source of publication :
Animal Behaviour
Authors :
הררי, אלי
;
.
Volume :
72
Co-Authors:
Segoli, M., Department of Life Sciences, Ben-Gurion University of the Negev, Israel
Harari, A.R., Department of Entomology, Agricultural Research Organization, The Volcani Center, Israel
Lubin, Y., Mitrani Department of Desert Ecology, Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Israel
Facilitators :
From page:
635
To page:
642
(
Total pages:
8
)
Abstract:
The reproductive success of a male is thought to be a function of the number of females he fertilizes. Nevertheless, various naturally occurring male behaviours seem to reduce dramatically the probability of obtaining additional matings. Such behaviours are expected when mating opportunities are limited for males and when males compete strongly for females or fertilizations. In widow spiders, males cohabit in females' webs, engage in long courtship displays, often lose the tip of one or both emboli (copulatory organs) inside the female's genital tract during copulation and are occasionally cannibalized by the female. We investigated conditions that may favour the evolution of a high-investment strategy of mating in white widow, Latrodectus pallidus, males. We followed male movements between females in a patchily distributed population of white widows and estimated the minimum number of males with which field-caught females mated from the number of embolus tips found in their genital tracts. The encounter rate of males with females was low with less than 20% of the searching males reaching a female. Females, in contrast, frequently mated with more than one male (up to six). We suggest that low encounter rates with females, coupled with high intrasexual competition, drives the evolution of a strategy of high investment by males in a single mating, as was observed in the white widow spider. © 2006 The Association for the Study of Animal Behaviour.
Note:
Related Files :
copulation
fertilization (reproduction)
intersexual interaction
Mating behavior
monogamy
reproductive success
Theridiidae
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.anbehav.2005.11.021
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
27713
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:33
Scientific Publication
Limited mating opportunities and male monogamy: a field study of white widow spiders, Latrodectus pallidus (Theridiidae)
72
Segoli, M., Department of Life Sciences, Ben-Gurion University of the Negev, Israel
Harari, A.R., Department of Entomology, Agricultural Research Organization, The Volcani Center, Israel
Lubin, Y., Mitrani Department of Desert Ecology, Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Israel
Limited mating opportunities and male monogamy: a field study of white widow spiders, Latrodectus pallidus (Theridiidae)
The reproductive success of a male is thought to be a function of the number of females he fertilizes. Nevertheless, various naturally occurring male behaviours seem to reduce dramatically the probability of obtaining additional matings. Such behaviours are expected when mating opportunities are limited for males and when males compete strongly for females or fertilizations. In widow spiders, males cohabit in females' webs, engage in long courtship displays, often lose the tip of one or both emboli (copulatory organs) inside the female's genital tract during copulation and are occasionally cannibalized by the female. We investigated conditions that may favour the evolution of a high-investment strategy of mating in white widow, Latrodectus pallidus, males. We followed male movements between females in a patchily distributed population of white widows and estimated the minimum number of males with which field-caught females mated from the number of embolus tips found in their genital tracts. The encounter rate of males with females was low with less than 20% of the searching males reaching a female. Females, in contrast, frequently mated with more than one male (up to six). We suggest that low encounter rates with females, coupled with high intrasexual competition, drives the evolution of a strategy of high investment by males in a single mating, as was observed in the white widow spider. © 2006 The Association for the Study of Animal Behaviour.
Scientific Publication
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