Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/16248
Title: Multiple Paternity in the Norway Rat, Rattus norvegicus, from Urban Slums in Salvador, Brazil
Authors: Costa, Federico
Richardson, Jonathan L.
Dion, Kirstin
Mariani, Carol
Pertile, Arsinoe C.
Burak, Mary K.
Childs, James E.
Ko, Albert Icksang
Caccone, Adalgisa
Affilliation: Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.
Providence College. Cunningham Square. Providence, RI.
Yale University. Department of Ecology and Evolutionary Biology. Sachem Street, New Haven.
Yale University. Department of Ecology and Evolutionary Biology. Sachem Street, New Haven.
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.
Providence College. Cunningham Square. Providence, RI.
Yale School of Public Health. Department of Epidemiology of Microbial Disease. College Street, New Haven.
Yale School of Public Health. Department of Epidemiology of Microbial Disease. College Street, New Haven.
Yale University. Department of Ecology and Evolutionary Biology. Sachem Street, New Haven.
Abstract: The Norway rat, Rattus norvegicus, is one of the most important pest species globally and the main reservoir of leptospires causing human leptospirosis in the urban slums of tropical regions. Rodent control is a frequent strategy in those settings to prevent the disease but rapid growth from residual populations and immigration limit the long-term effectiveness of interventions. To characterize the breeding ecology of R. norvegicus and provide needed information for the level of genetic mixing, which can help identify inter-connected eradication units, we estimated the occurrence of multiple paternity, distances between mothers and sires, and inbreeding in rats from urban slum habitat in Salvador, Brazil. We genotyped 9 pregnant females, their 66 offspring, and 371 males at 16 microsatellite loci. Multiple paternity was observed in 22% (2/9) of the study litters. Of the 12 sires that contributed to the 9 litters, we identified 5 (42%) of those sires among our genotyped males. Related males were captured in close proximity to pregnant females (the mean inter-parent trapping distance per litter was 70 m, ±58 m SD). Levels of relatedness between mother-sire pairs were higher than expected and significantly higher than relatedness between all females and non-sire males. Our findings indicate multiple paternity is common, inbreeding is apparent, and that mother-sire dyads occur in close proximity within the study area. This information is relevant to improve the spatial definition of the eradication units that may enhance the effectiveness of rodent management programs aimed at preventing human leptospirosis. High levels of inbreeding may also be a sign that eradication efforts are successful.
Keywords: Brown rat
Genetics
Mating behavior
Microsatellite
Multiple paternity
Polyandry
Rattus norvegicus
Urban slums
keywords: Rattus norvegicus
Genética
Comportamento de acasalamento
Microssatélites
Múltiplos paternidade
Favelas urbanas
Rato marrom
Poliandria
Issue Date: 2016
Publisher: Oxfor University Press
Citation: COSTA, F. et al. Multiple Paternity in the Norway Rat, Rattus norvegicus, from Urban Slums in Salvador, Brazil. Journal of Heredity, v. 107, n. 2, p. 181–186, 2016.
DOI: 10.1093/jhered/esv098
ISSN: 0022-1503
Copyright: open access
Appears in Collections:BA - IGM - Artigos de Periódicos

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