Penguin predation by extra-limital sub-Antarctic fur seals Arctocephalus tropicalis

Machado Rodrigo; Perez Martin Sucunza; Arus Bernardo A.de Lima Renan C.Botta SilvinaValiati Victor HugoOliveira Larissa R.Carlos Caio J.

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Penguin predation by extra-limital sub-Antarctic fur seals Arctocephalus tropicalis

机译：Penguin predation by extra-limital sub-Antarctic fur seals Arctocephalus tropicalis

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Sub-Antarctic fur seals, Arctocephalus tropicalis, are widely distributed in the southern hemisphere, breeding on islands north of the Antarctic Convergence in the South Atlantic, South Indian, and Southwestern Pacific Oceans. At their breeding grounds, sub-Antarctic fur seals feed on a variety of fish, cephalopods, crustaceans, and occasionally, on penguins. According to the literature, the species feeds mainly on squid and fish, in the southern Brazilian coast, during the non-breeding period and far away from its breeding colonies. Here, we present records of predation on penguins by sub-Antarctic fur seals off southern Brazilian coast (29 degrees 20 ' S, 49 degrees 43 ' W to 33 degrees 44 ' S, 53 degrees 22 ' W). We examined the gastrointestinal contents of 61 sub-Antarctic fur seals collected from 1987 to 2019. Remaining of penguins were found in the gastrointestinal tracts of three adult males (4.9%). We identified feathers, and other bird parts by comparing them specimens from scientific collections and illustrations in the literature. Seabirds found in the gastrointestinal tracts of the three sub-Antarctic fur seals were most probably Magellanic Penguins, Spheniscus magellanicus. To our knowledge, this is the first study reporting predation on penguins by sub-Antarctic fur seals far from their breeding colonies. Although penguins are not among the main prey of sub-Antarctic fur seals, our results suggest that they occasionally feed on penguins during the non-breeding period along the southern coast of Brazil.

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《Polar Biology》 |2021年第12期|2321-2327|共7页
作者
Machado Rodrigo; Perez Martin Sucunza; Arus Bernardo A.de Lima Renan C.Botta SilvinaValiati Victor HugoOliveira Larissa R.Carlos Caio J.;
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Grp Estudos Mamiferos Aquat Rio Grande Sul GEMARS, BR-95560000 Torres, RS, Brazil|Univ Extremo Sul Catarinense UNESC, Lab Zool & Ecol Vertebrados LABZEV, BR-88806000 Criciuma, SC, Brazil|Univ Extremo Sul Catarinense UNESC, Museu Zool Prof Morgana Cirimbel;

Grp Estudos Mamiferos Aquat Rio Grande Sul GEMARS, BR-95560000 Torres, RS, Brazil;

Univ Fed Rio Grande Do Sul UFRGS, Ctr Estudos Costeiros Limnol & Marinhos CECLIMAR, BR-95625000 Imbe, RS, BrazilUniv Fed Rio Grande FURG, Inst Oceanog, Lab Ecol & Conservacao Megafauna Marinha ECOMEGA, BR-96201900 Rio Grande, RS, BrazilUniv Vale Rio Sinos UNISINOS, Ctr Ciencias Saude, Lab Genet & Biol Mol, BR-93022000 Sao Leopoldo, RS, BrazilGrp Estudos Mamiferos Aquat Rio Grande Sul GEMARS, BR-95560000 Torres, RS, Brazil|Univ Vale Rio Sinos UNISINOS, Lab Ecol Mamiferos, BR-93022000 Sao Leopoldo, RS, BrazilUniv Fed Rio Grande Do Sul, Dept Zool, Lab Sistemat & Ecol Aves & Mamiferos Marinhos, BR-91501970 Porto Alegre, RS, Brazil;

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正文语种英语
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Brazilian coast; Vagrant fur seals; Penguin predation; Seabird predation; Spheniscus magellanicus;

Penguin predation by extra-limital sub-Antarctic fur seals Arctocephalus tropicalis

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