the role of body size in mating success of sphenarium purpurascens in central mexico

1. The effect of body size on the assortative mating and reproductive behaviour of the univoltine grasshopper Sphenarium purpurascens (Charpentier) was studied in Central Mexico. 2. Assortative mating by size was observed in the field. Evidence of positive assortative mating in relation to body size...

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Detalhes bibliográficos
Autores: del Castillo, RC, Nunez-Farfan, J, Cano-Santana, Zenón
Formato: artículo
Estado:Versión publicada
Fecha de publicación:1999
País:México
Recursos:Universidad Nacional Autónoma de México
Repositorio:Sistema de Información de la Facultad de Ciencias, UNAM
OAI Identifier:oai:repositorio.fciencias.unam.mx:11154/2154
Acesso em linha:http://hdl.handle.net/11154/2154
Access Level:acceso abierto
Palavra-chave:Entomology
assortative mating
body size
guarding behaviour
mating success
Mexico
Orthoptera
protandry
Pyrgomorphidae
sex ratio
Sphenarium purpurascens
tropical grasshoppers
id MX_fc9ffaef1f7052c2e253f84c8aa39dee
oai_identifier_str oai:repositorio.fciencias.unam.mx:11154/2154
network_acronym_str MX
network_name_str México
repository_id_str
spelling the role of body size in mating success of sphenarium purpurascens in central mexicodel Castillo, RCNunez-Farfan, JCano-Santana, ZenónEntomologyassortative matingbody sizeguarding behaviourmating successMexicoOrthopteraprotandryPyrgomorphidaesex ratioSphenarium purpurascenstropical grasshoppers1. The effect of body size on the assortative mating and reproductive behaviour of the univoltine grasshopper Sphenarium purpurascens (Charpentier) was studied in Central Mexico. 2. Assortative mating by size was observed in the field. Evidence of positive assortative mating in relation to body size was found in laboratory experiments. Female fecundity and male success in contests were also correlated with body size. 3. Larger females had a higher number of eggs per pod. Larger males usually won fights and were able to take over females from other males, and to resist takeovers by other males while guarding. 4. Individuals of both sexes were observed copulating with more than one sexual partner in the field, suggesting polygamy. Male-male contests determined access to females, and males exhibited a postcopulatory prolonged mate-guarding behaviour lasting up to 18 days. 5. In a 2-year study, sex ratio was male-biased at the beginning of the reproductive season and decreased to 1:1 by the end of the season, suggesting that the population is protandrous. 6. The results of this study indicate that assortative mating results from male-male competition and female availability, and suggests that body size is a potential target of natural and sexual selection.2011-01-22T10:27:39Z2011-01-22T10:27:39Z2011-01-22T10:27:39Z2011-01-22T10:27:39Z1999info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article0307-6946http://hdl.handle.net/11154/2154262924(2):146-155reponame:Sistema de Información de la Facultad de Ciencias, UNAMinstname:Universidad Nacional Autónoma de Méxicoinstacron:UNAMenEcological Entomologyinfo:eu-repo/semantics/openAccessoai:repositorio.fciencias.unam.mx:11154/21542025-09-17T19:20:49Z
dc.title.none.fl_str_mv the role of body size in mating success of sphenarium purpurascens in central mexico
title the role of body size in mating success of sphenarium purpurascens in central mexico
spellingShingle the role of body size in mating success of sphenarium purpurascens in central mexico
del Castillo, RC
Entomology
assortative mating
body size
guarding behaviour
mating success
Mexico
Orthoptera
protandry
Pyrgomorphidae
sex ratio
Sphenarium purpurascens
tropical grasshoppers
title_short the role of body size in mating success of sphenarium purpurascens in central mexico
title_full the role of body size in mating success of sphenarium purpurascens in central mexico
title_fullStr the role of body size in mating success of sphenarium purpurascens in central mexico
title_full_unstemmed the role of body size in mating success of sphenarium purpurascens in central mexico
title_sort the role of body size in mating success of sphenarium purpurascens in central mexico
dc.creator.none.fl_str_mv del Castillo, RC
Nunez-Farfan, J
Cano-Santana, Zenón
author del Castillo, RC
author_facet del Castillo, RC
Nunez-Farfan, J
Cano-Santana, Zenón
author_role author
author2 Nunez-Farfan, J
Cano-Santana, Zenón
author2_role author
author
dc.subject.none.fl_str_mv Entomology
assortative mating
body size
guarding behaviour
mating success
Mexico
Orthoptera
protandry
Pyrgomorphidae
sex ratio
Sphenarium purpurascens
tropical grasshoppers
topic Entomology
assortative mating
body size
guarding behaviour
mating success
Mexico
Orthoptera
protandry
Pyrgomorphidae
sex ratio
Sphenarium purpurascens
tropical grasshoppers
description 1. The effect of body size on the assortative mating and reproductive behaviour of the univoltine grasshopper Sphenarium purpurascens (Charpentier) was studied in Central Mexico. 2. Assortative mating by size was observed in the field. Evidence of positive assortative mating in relation to body size was found in laboratory experiments. Female fecundity and male success in contests were also correlated with body size. 3. Larger females had a higher number of eggs per pod. Larger males usually won fights and were able to take over females from other males, and to resist takeovers by other males while guarding. 4. Individuals of both sexes were observed copulating with more than one sexual partner in the field, suggesting polygamy. Male-male contests determined access to females, and males exhibited a postcopulatory prolonged mate-guarding behaviour lasting up to 18 days. 5. In a 2-year study, sex ratio was male-biased at the beginning of the reproductive season and decreased to 1:1 by the end of the season, suggesting that the population is protandrous. 6. The results of this study indicate that assortative mating results from male-male competition and female availability, and suggests that body size is a potential target of natural and sexual selection.
publishDate 1999
dc.date.none.fl_str_mv 1999
2011-01-22T10:27:39Z
2011-01-22T10:27:39Z
2011-01-22T10:27:39Z
2011-01-22T10:27:39Z
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 0307-6946
http://hdl.handle.net/11154/2154
2629
identifier_str_mv 0307-6946
2629
url http://hdl.handle.net/11154/2154
dc.language.none.fl_str_mv en
language_invalid_str_mv en
dc.relation.none.fl_str_mv Ecological Entomology
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv 24(2):146-155
reponame:Sistema de Información de la Facultad de Ciencias, UNAM
instname:Universidad Nacional Autónoma de México
instacron:UNAM
instname_str Universidad Nacional Autónoma de México
instacron_str UNAM
institution UNAM
reponame_str Sistema de Información de la Facultad de Ciencias, UNAM
collection Sistema de Información de la Facultad de Ciencias, UNAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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