[MARMAM] New Publication: Anomalous colour in Neotropical mammals: a review with new records for Didelphis sp. (Didelphidae, Didelphimorphia) and Arctocephalus australis (Otariidae, Carnivora)

Rodrigo Machado ecomachado at gmail.com
Thu May 30 09:12:46 PDT 2013


Dear colleagues,



I am pleased to announce the publication of 1 paper about anomalous colour
in Neotropical mammals, including marine mammals:



*Abstract: *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.



Full text is available at: http://www.scielo.br/pdf/bjb/v73n1/20.pdf


Best regards,

-- 

Msc. Rodrigo Machado
______________________________________________________________________

 Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul (GEMARS). Av:
Tramandaí, 976, Imbé, RS 95625-000 Brasil.

Red de Marcación de Pinnípedos en Latinoamérica
http://marcaciondepinnipedos.blogspot.com.ar/

CV Lattes: *http://lattes.cnpq.br/4393555159586066*
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