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| Burdman,Luciana; Daneri,Gustavo A.; Negrete,Javier; Mennucci,Jorge A.; Marquez,Maria E. I.. |
| The aim of the present study was to enhance the knowledge of the feeding habits of the juvenile component of the population of Southern elephant seals [Mirounga leonina (Linnaeus, 1758)] from Isla 25 de Mayo, South Shetland Islands, age class whose diet information is scarce. A total of 60 individuals were stomach lavaged in the spring - summer seasons of three consecutive years (2003, 2004 and 2005) of which 53.3 % (n = 32) presented food remnants. The Antarctic glacial squid Psychroteuthis glacialis Thiele, 1921 was the dominant prey taxon in terms of frequency of occurrence (68.7%), numerical abundance (60.1%) and biomass (51.5%), contributing 84.1% to the total relative importance index. Other squid prey species of importance were Slosarczykovia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mirounga; Diet; Antarctica. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212015000100012 |
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| Daneri,Gustavo A.; Esponda,César M. García; De Santis,Luciano J. M.; Pla,Laura. |
| The skull morphometrics of adult male Antarctic fur seal, Arctocephalus gazella (Peters, 1875) and South American fur seal, A. australis (Zimmermann, 1783) were investigated using a collection of 45 and 38 skulls, respectively. Eighteen measurements were taken for each specimen. Comparative univariate and multivariate statistical analyses included standard statistics, one-way analysis of variance, principal component analysis and discriminant analysis. Individual variation was relatively high for some variables, as expressed by the coefficient of variation. Skulls of A. gazella were larger than those of A. australis for all but two variables: squamosal jugal suture and rostral length. Both species differed significantly as shown by both univariate and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arctocephalus; Otariidae; Cranial characteristics. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212005000300006 |
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| Bustos,Raimundo L.; Daneri,Gustavo A.; Volpedo,Alejandra V.; Harrington,Ana; Varela,Esperanza A.. |
| The South American sea lion, Otaria flavescens (Shaw, 1800) population is steadily expanding along the Patagonian coast of Argentina in the last decades. However, little is known about the feeding ecology of the species in the area. The aim of this study was to analyze the food habits of O. flavescens from 91 scats collected at Río Negro province, during the winter and spring of 2005. Fish occurred in 96% of scats containing prey remains, followed by cephalopods (26%). Raneya brasiliensis (Kaup, 1856) was the most frequent and abundant species occurring in 58.6% of samples and constituting almost 50% of fish predated. Second in importance were Porichthys porosissimus (Cuvier, 1829) and Cynoscion guatucupa (Cuvier, 1830) in terms of occurrence (%FO 20.7)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trophic ecology; Pinnipedia; Fishes; Cephalopods. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000400005 |
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| Varela,Esperanza A.; Daneri,Gustavo A.; Paso Viola,M. Natalia; Negri,M. Fernanda; Di Martino,Cecilia C.; Harrington,Ana; Montiel,Ricardo A.; Zambrana,Mercedes M.; Bustos,Raimundo L.; Vaccaro,Olga B.. |
| Se realizó una revisión de los ejemplares de la Colección de Mamíferos Marinos del Museo Argentino de Ciencias Naturales "Bernardino Rivadavia". La misma indicó que del total de ejemplares catalogados (n=378), el 56.9% corresponde a Cetacea mientras que el 43.1% restante corresponde a Pinnipedia. Dentro de Cetacea la familia más representada es Delphinidae y el género con más ejemplares, Pontoporia (Pontoporidae); se reportan además, en forma complementaria, tres ejemplares tipo que no fueron listados en un trabajo previo. Dentro de los Pinnipedia, la familia mejor representada es Otariidae y el género con mayor número de ejemplares, Otaria. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Argentina; Cetacea; Colecciones; Ejemplares tipos; Pinnipedia. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832010000100028 |
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