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      Frequency of leucism in a colony of Anoura geoffroyi (Chiroptera: Phyllostomidae) roosting in a ferruginous cave in Brazil Translated title: Frequência de leucismo em uma colônia de Anoura geoffroyi (Chiroptera: Phyllostomidae) abrigada em uma caverna ferruginosa no Brasil

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          Abstract

          Abstract: We provide the first report of the frequency of leucism for a species of Neotropical bat. Leucism is an anomaly of the skin pigmentation of an animal that manifests itself as the total or partial loss of the natural color of the species, and can affect part of or the entire body. During a study involving capture and marking individuals of a population of A. geoffroyi residing in a cave in the Brazilian state of Minas Gerais, seven individuals with some degree of depigmentation were recorded out of 616 individuals marked, for a frequency of 1.1%. Since leucism is due to recessive gene expression, these findings may indicate that the population is isolated and possesses a high level of endogamy. Factors that may be responsible for this condition in the studied population remain unknown.

          Translated abstract

          Resumo: Relatamos aqui o primeiro registro de frequência de leucismo em uma espécie de morcego Neotropical. Leucismo é uma anomalia na pigmentação da pele dos animais que consiste na perda total ou parcial da cor natural da espécie, podendo acometer partes ou todo o corpo do animal. Em um estudo de captura e marcação de indivíduos de uma população de A. geoffroyi abrigada em uma caverna localizada no estado de Minas Gerais, foram registrados sete indivíduos com algum grau de despigmentação dentre 616 indivíduos marcados, representando 1.1% da população. Leucismo é um tipo de anomalia de coloração de expressão gênica recessiva, portanto, esse resultado pode indicar isolamento da população e nível elevado de endogamia. Fatores que podem levar à esta condição nessa população são desconhecidos.

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          Most cited references32

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          The Adaptive Significance of Coloration in Mammals

          Tim Caro (2005)
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            Anomalous colour in Neotropical mammals: a review with new records for Didelphis sp. (Didelphidae, Didelphimorphia) and Arctocephalus australis (Otariidae, Carnivora)

            Anomalous colourations occur in many tropical vertebrates. However, they are considered rare in wild populations, with very few records for the majority of animal taxa. We report two new cases of anomalous colouration in mammals. Additionally, we compiled all published cases about anomalous pigmentation registered in Neotropical mammals, throughout a comprehensive review of peer reviewed articles between 1950 and 2010. Every record was classified as albinism, leucism, piebaldism or eventually as undetermined pigmentation. As results, we report the new record of a leucistic specimen of opossum (Didelphis sp.) in southern Brazil, as well as a specimen of South American fur seal (Arctocephalus australis) with piebaldism in Uruguay. We also found 31 scientific articles resulting in 23 records of albinism, 12 of leucism, 71 of piebaldism and 92 records classified as undetermined pigmentation. Anomalous colouration is apparently rare in small terrestrial mammals, but it is much more common in cetaceans and michrochiropterans. Out of these 198 records, 149 occurred in cetaceans and 30 in bats. The results related to cetaceans suggest that males and females with anomolous pigmentation are reproductively successful and as a consequence their frequencies are becoming higher in natural populations. In bats, this result can be related to the fact these animals orient themselves primarily through echolocation, and their refuges provide protection against light and predation. It is possible that anomalous colouration occurs more frequently in other Neotropical mammal orders, which were not formally reported. Therefore, we encourage researchers to publish these events in order to better understand this phenomenon that has a significant influence on animal survival.
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              Physiographic, stratigraphic, and structural development of the Quadrilatero Ferrifero, Minas Gerais, Brazil

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                bn
                Biota Neotropica
                Biota Neotrop.
                Instituto Virtual da Biodiversidade | BIOTA - FAPESP (Campinas, SP, Brazil )
                1806-129X
                1676-0611
                April 2019
                : 19
                : 3
                : e20180676
                Affiliations
                [1] Belo Horizonte orgnamePontifícia Universidade Católica de Minas Gerais Brazil
                [2] Rio de Janeiro RJ orgnameVale S.A. orgdiv1Licenciamento e Espeleologia da Diretoria de Planejamento de Ferrosos Brasil
                Article
                S1676-06032019000300502
                10.1590/1676-0611-bn-2018-0676
                0c07d185-7eb1-4eea-bcc5-c07fc49e2bd0

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 26 March 2019
                : 12 October 2018
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 36, Pages: 0
                Product

                SciELO Brazil

                Categories
                Short Communication

                Glossophaginae,hypopigmentation,bats,Iron Quadrangle,hipopigmentação,morcegos,Quadrilátero Ferrífero

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