Atypical coloration in a specimen of estuarine dolphin, Sotalia guianensis, on the littoral of the state of Rio Grande do Norte, north-east Brazil

Nascimento, Lídio França do; Spinelli, Luísa Helena Pinheiro; Santos, Emanuella Barros dos; Queiroz, Rose Emília; Pansard, Kelly C.; Medeiros, Priscila Izabel A. P.; Gondim, M.A.; Jesus, Adolfo Hubner; Silva, Flávio José de Lima; Yamamoto, E.M.

doi:10.1017/s1755267207008986

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…In spite of the rareness of this condition, anomalously pigmented cetaceans have been recorded in at least 22 different species to date (Hain & Leatherwood, 1982;Fertl et al, 1999Fertl et al, , 2004Visser et al, 2004;Stockin & Visser, 2005;Nascimento et al, 2008;De Boer, 2010), with variations ranging from albinism, to piebaldism, to fully melanistic or all-black individuals (e.g. Visser et al, 2004).…”

Section: R E S U L T S a N D Discussionmentioning

confidence: 99%

Rare sighting of an anomalously white harbour porpoise (Phocoena phocoena) in the Moray Firth, north-east Scotland

Robinson¹,

Haskins²

2013

Mar. Biodivers. Rec.

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This paper describes a rare sighting of an anomalously white harbour porpoise (Phocoena phocoena) in the coastal waters of the outer Moray Firth in northeast Scotland. The recording provides the first photographs of such an individual from the northern North Sea. At an estimated body length of 1.5 m, the present animal had evidently survived to adulthood, in spite of its condition, confirming the potential longevity of such hypo-pigmented individuals in the wild. Further recaptures of this naturally-marked animal may provide valuable information on the site fidelity and long-term spatial movements of these notoriously difficult to study cetaceans.

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Section: R E S U L T S a N D Discussionmentioning

confidence: 99%

Rare sighting of an anomalously white harbour porpoise (Phocoena phocoena) in the Moray Firth, north-east Scotland

Robinson¹,

Haskins²

2013

Mar. Biodivers. Rec.

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“…We were unable to verify whether the cases registered for Guiana dolphin, Sotalia guianensis (van Bénéden, 1864) (Nascimento et al, 2008), and Pantropical spotted dolphin, Stenella attenuata graffmani (Lönnberg, 1934) (Fertl et al, 2004), were of albinism or leucism because the authors were unable to check the colour of the individuals' eyes. For sperm whale, Physeter macrocephalus Linnaeus, 1758, Fertl et al (1999) did not include much information about this record, restraining an appropriate classification.…”

Section: Compilation Of the Records Of Anomalous Coloration In Neotromentioning

confidence: 99%

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

et al. 2013

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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.Keywords: albinism, hypopigmentation, leucism, Neotropical mammals, piebaldism.Coloração anômala em mamíferos Neotropicais: uma revisão com novos registros para Didelphis sp. (Didelphidae, Didelphimorphia) e Arctocephalus australis (Otariidae, Carnivora) ResumoColorações anômalas ocorrem em muitos vertebrados tropicais. Entretanto, estas são consideradas raras em populações selvagens, havendo poucos registros para a maioria dos táxons. Reportam-se, neste estudo, dois novos casos de coloração anômala em mamíferos. Além disso, por meio de uma extensa revisão bibliográfica, foram compilados os casos publicados sobre coloração anômala em mamíferos neotropicais entre 1950 e 2010. Cada registro foi classificado como albinismo, leucismo, piebaldismo ou, eventualmente, como coloração indeterminada. Como resultados, reportouse o registro de um espécime leucístico de gambá (Didelphis sp.) no sul do Brasil e de um espécime de lobo-marinho sul-americano (Arctocephalus australis) com piebaldismo no norte do Uruguai. Também foram analisados 31 artigos científicos, resultando em 23 registros de albinismo, 12 de leucismo, 71 de piebaldismo e 92 registros classificados como de pigmentação indeterminada. A coloração anômala aparentemente é rara em pequenos mamíferos terrestres...

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“…Fertl et al (2004 reviewed the occurrence of anomalously white cetaceans, indicating that this characteristic has been observed in 20 cetacean species. Recent records included Megaptera novaeangliae (Forestell et al 2001), Stenella attenuata graffmani (Fertl et al 2004), and Sotalia guianensis (Nascimento et al 2008). However, this is the first case of a white franciscana dolphin.…”

Section: Introductionmentioning

confidence: 92%

First record of an anomalously colored franciscana dolphin, Pontoporia blainvillei

Cremer

Sartori

Schulze

et al. 2014

An. Acad. Bras. Ciênc.

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On October 2011, a newborn franciscana dolphin with an anomalously coloration was sighted in Babitonga Bay, southern Brazil. The calf was totally white. Besides the potential mother and newborn, the group also had the presence of another adult, who always was swimming behind the pair. Both adults had the typical coloration of the species, with the back in grayish brown. The group, composed by the white franciscana calf, his pontential mother and one more adult, was reported in five occasions. The group was always in the same area where it was first recorded and showed the same position during swimming. Between first and last sighting of the white calf (113 days) the color has not changed. This is the first case of a white franciscana dolphin. This coloration has never been reported despite the high number of dead franciscanas recovered each year along the distribution of the species, resulting from accidental capture in fishing nets. This fact leads us to believe that this is a very rare characteristic for this species. We considered the possibility that this franciscana could be an albino dolphin.

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Atypical coloration in a specimen of estuarine dolphin, Sotalia guianensis, on the littoral of the state of Rio Grande do Norte, north-east Brazil

Cited by 6 publications

References 4 publications

Rare sighting of an anomalously white harbour porpoise (Phocoena phocoena) in the Moray Firth, north-east Scotland

Rare sighting of an anomalously white harbour porpoise (Phocoena phocoena) in the Moray Firth, north-east Scotland

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

First record of an anomalously colored franciscana dolphin, Pontoporia blainvillei

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