Morphometric and demographic differences between tropical and temperate Norway rats (Rattus norvegicus).

Detalhes bibliográficos
Autor(a) principal: Porter, Fleur H.
Data de Publicação: 2015
Outros Autores: Costa, Federico, Rodrigues, Gorete, Farias, Helena, Cunha, Marcelo, Glass, Gregory E., et al.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/19162
Resumo: Rattus norvegicus Norway rat)is one of the most abundant and geographically widespread mammals. Ecological studies focusing on urban Norway rat populations are restricted to temperate regions, and data describing populations from tropical cities are lacking. We compared the morphometrics and demographic characteristics of rats captured in urban low-income settlements in Salvador, Brazil, to a season, environmental area of capture, and sex-matched sample from Baltimore, Maryland. Norway rats of both sexes were significantly smaller in Salvador, although the threshold mass marking sexual maturity was equivalent for both cities. Pregnancy rates were comparable (~50%); however, juveniles were commonly trapped in Salvador (20%) while they were rarely trapped in Baltimore during winter months (2%). These findings suggest that tropical and temperate rats differ with respect to body metrics, while size at sexual maturity is similar. Further studies conducted over different seasons are required before any firm conclusions are reached; however, this study provides preliminary support for Bergmann’s rule that species at higher absolute latitude are larger than the same species sampled at lower latitudes.
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spelling Porter, Fleur H.Costa, FedericoRodrigues, GoreteFarias, HelenaCunha, MarceloGlass, Gregory E., et al.2016-05-11T14:51:27Z20151545-1542http://repositorio.ufba.br/ri/handle/ri/19162v.96, n.2, p.317–323Rattus norvegicus Norway rat)is one of the most abundant and geographically widespread mammals. Ecological studies focusing on urban Norway rat populations are restricted to temperate regions, and data describing populations from tropical cities are lacking. We compared the morphometrics and demographic characteristics of rats captured in urban low-income settlements in Salvador, Brazil, to a season, environmental area of capture, and sex-matched sample from Baltimore, Maryland. Norway rats of both sexes were significantly smaller in Salvador, although the threshold mass marking sexual maturity was equivalent for both cities. Pregnancy rates were comparable (~50%); however, juveniles were commonly trapped in Salvador (20%) while they were rarely trapped in Baltimore during winter months (2%). These findings suggest that tropical and temperate rats differ with respect to body metrics, while size at sexual maturity is similar. Further studies conducted over different seasons are required before any firm conclusions are reached; however, this study provides preliminary support for Bergmann’s rule that species at higher absolute latitude are larger than the same species sampled at lower latitudes.Submitted by Maria Creuza Silva (mariakreuza@yahoo.com.br) on 2016-05-11T14:51:27Z No. of bitstreams: 1 Art Per Estrang Federico Costa 2. 2015.pdf: 929989 bytes, checksum: 17cdf365fec2c784f499d2bdecbe9c32 (MD5)Made available in DSpace on 2016-05-11T14:51:27Z (GMT). No. of bitstreams: 1 Art Per Estrang Federico Costa 2. 2015.pdf: 929989 bytes, checksum: 17cdf365fec2c784f499d2bdecbe9c32 (MD5) Previous issue date: 2015LawrenceAmerican Society of Mammalogistshttp://jmammal.oxfordjournals.org/content/jmammal/96/2/317.full.pdfreponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBABergmann’s ruleInvasive speciesNorway ratRodent controlUrban ecologyMorphometric and demographic differences between tropical and temperate Norway rats (Rattus norvegicus).J. 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dc.title.pt_BR.fl_str_mv Morphometric and demographic differences between tropical and temperate Norway rats (Rattus norvegicus).
dc.title.alternative.pt_BR.fl_str_mv J. Mammal.
title Morphometric and demographic differences between tropical and temperate Norway rats (Rattus norvegicus).
spellingShingle Morphometric and demographic differences between tropical and temperate Norway rats (Rattus norvegicus).
Porter, Fleur H.
Bergmann’s rule
Invasive species
Norway rat
Rodent control
Urban ecology
title_short Morphometric and demographic differences between tropical and temperate Norway rats (Rattus norvegicus).
title_full Morphometric and demographic differences between tropical and temperate Norway rats (Rattus norvegicus).
title_fullStr Morphometric and demographic differences between tropical and temperate Norway rats (Rattus norvegicus).
title_full_unstemmed Morphometric and demographic differences between tropical and temperate Norway rats (Rattus norvegicus).
title_sort Morphometric and demographic differences between tropical and temperate Norway rats (Rattus norvegicus).
author Porter, Fleur H.
author_facet Porter, Fleur H.
Costa, Federico
Rodrigues, Gorete
Farias, Helena
Cunha, Marcelo
Glass, Gregory E., et al.
author_role author
author2 Costa, Federico
Rodrigues, Gorete
Farias, Helena
Cunha, Marcelo
Glass, Gregory E., et al.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Porter, Fleur H.
Costa, Federico
Rodrigues, Gorete
Farias, Helena
Cunha, Marcelo
Glass, Gregory E., et al.
dc.subject.por.fl_str_mv Bergmann’s rule
Invasive species
Norway rat
Rodent control
Urban ecology
topic Bergmann’s rule
Invasive species
Norway rat
Rodent control
Urban ecology
description Rattus norvegicus Norway rat)is one of the most abundant and geographically widespread mammals. Ecological studies focusing on urban Norway rat populations are restricted to temperate regions, and data describing populations from tropical cities are lacking. We compared the morphometrics and demographic characteristics of rats captured in urban low-income settlements in Salvador, Brazil, to a season, environmental area of capture, and sex-matched sample from Baltimore, Maryland. Norway rats of both sexes were significantly smaller in Salvador, although the threshold mass marking sexual maturity was equivalent for both cities. Pregnancy rates were comparable (~50%); however, juveniles were commonly trapped in Salvador (20%) while they were rarely trapped in Baltimore during winter months (2%). These findings suggest that tropical and temperate rats differ with respect to body metrics, while size at sexual maturity is similar. Further studies conducted over different seasons are required before any firm conclusions are reached; however, this study provides preliminary support for Bergmann’s rule that species at higher absolute latitude are larger than the same species sampled at lower latitudes.
publishDate 2015
dc.date.issued.fl_str_mv 2015
dc.date.accessioned.fl_str_mv 2016-05-11T14:51:27Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://repositorio.ufba.br/ri/handle/ri/19162
dc.identifier.issn.none.fl_str_mv 1545-1542
dc.identifier.number.pt_BR.fl_str_mv v.96, n.2, p.317–323
identifier_str_mv 1545-1542
v.96, n.2, p.317–323
url http://repositorio.ufba.br/ri/handle/ri/19162
dc.language.iso.fl_str_mv eng
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dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv American Society of Mammalogists
publisher.none.fl_str_mv American Society of Mammalogists
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