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Reproductive Tactics of Sexes and Fitness in the Dragonfly, Diastatops obscura

The sexual selection strategies of territorial Odonata that do not present courtship behavior is still not completely understood, especially the role of the females. Diastatops obscura Fabricius (Odonata: Libellulidae) females participate in mate selection in a passive manner, allowing copulation wi...

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Autores principales: Irusta, Jorge Bañuelos, Araújo, Arrilton
Formato: Texto
Lenguaje:English
Publicado: University of Wisconsin Library 2007
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2999426/
https://www.ncbi.nlm.nih.gov/pubmed/20302544
http://dx.doi.org/10.1673/031.007.2401
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author Irusta, Jorge Bañuelos
Araújo, Arrilton
author_facet Irusta, Jorge Bañuelos
Araújo, Arrilton
author_sort Irusta, Jorge Bañuelos
collection PubMed
description The sexual selection strategies of territorial Odonata that do not present courtship behavior is still not completely understood, especially the role of the females. Diastatops obscura Fabricius (Odonata: Libellulidae) females participate in mate selection in a passive manner, allowing copulation with the first male that captures them and afterwards choosing whether to oviposit or not. This study introduces the idea of female passive choice as an adaptative tactic in intersexual selection. Also discussed is the adaptative value of this tactic and its flexibility according to environmental conditions and reproductive strategies adopted by the males. A natural population of Diastatops obscura was observed in the Pitimbu River of northeast Brazil. Focal continuous and ad libitum techniques were used to record attempted copulation, copulation, and oviposition behavior, in addition to registering male territoriality. An estimate of individual reproductive success (IRS) was obtained by recording 187 reproductive events. Territorial males, mainly occupying areas near the river margin, achieved greater copulation and oviposition success (IRS = 0.371) than did satellite males (IRS = 0.028). Females that copulated with territorial males experienced, for the most part, only one copulation and oviposition event, while those that copulated with satellite males fled or performed a second copulation with a territorial male. Thus, the best tactic adopted by the D. obscura males was to occupy a territory providing the greatest access to females, while the females used passive choice for fitness optimization.
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spelling pubmed-29994262010-12-09 Reproductive Tactics of Sexes and Fitness in the Dragonfly, Diastatops obscura Irusta, Jorge Bañuelos Araújo, Arrilton J Insect Sci Article The sexual selection strategies of territorial Odonata that do not present courtship behavior is still not completely understood, especially the role of the females. Diastatops obscura Fabricius (Odonata: Libellulidae) females participate in mate selection in a passive manner, allowing copulation with the first male that captures them and afterwards choosing whether to oviposit or not. This study introduces the idea of female passive choice as an adaptative tactic in intersexual selection. Also discussed is the adaptative value of this tactic and its flexibility according to environmental conditions and reproductive strategies adopted by the males. A natural population of Diastatops obscura was observed in the Pitimbu River of northeast Brazil. Focal continuous and ad libitum techniques were used to record attempted copulation, copulation, and oviposition behavior, in addition to registering male territoriality. An estimate of individual reproductive success (IRS) was obtained by recording 187 reproductive events. Territorial males, mainly occupying areas near the river margin, achieved greater copulation and oviposition success (IRS = 0.371) than did satellite males (IRS = 0.028). Females that copulated with territorial males experienced, for the most part, only one copulation and oviposition event, while those that copulated with satellite males fled or performed a second copulation with a territorial male. Thus, the best tactic adopted by the D. obscura males was to occupy a territory providing the greatest access to females, while the females used passive choice for fitness optimization. University of Wisconsin Library 2007-04-16 /pmc/articles/PMC2999426/ /pubmed/20302544 http://dx.doi.org/10.1673/031.007.2401 Text en © 2007 http://creativecommons.org/licenses/by/2.5/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Article
Irusta, Jorge Bañuelos
Araújo, Arrilton
Reproductive Tactics of Sexes and Fitness in the Dragonfly, Diastatops obscura
title Reproductive Tactics of Sexes and Fitness in the Dragonfly, Diastatops obscura
title_full Reproductive Tactics of Sexes and Fitness in the Dragonfly, Diastatops obscura
title_fullStr Reproductive Tactics of Sexes and Fitness in the Dragonfly, Diastatops obscura
title_full_unstemmed Reproductive Tactics of Sexes and Fitness in the Dragonfly, Diastatops obscura
title_short Reproductive Tactics of Sexes and Fitness in the Dragonfly, Diastatops obscura
title_sort reproductive tactics of sexes and fitness in the dragonfly, diastatops obscura
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2999426/
https://www.ncbi.nlm.nih.gov/pubmed/20302544
http://dx.doi.org/10.1673/031.007.2401
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