Artículo
Habitat use, seasonality and demography of the broadnose sevengill shark Notorynchus cepedianus in central Patagonia: Another piece of the puzzle
Irigoyen, Alejo Joaquin
; Bovcon, Nelson; Trobbiani, Gastón Andres
; De Wysiecki, Agustín M.; Argemi, Federico; Jaureguizar, Andrés J.
Fecha de publicación:
12/2019
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Austral Ecology
ISSN:
1442-9985
e-ISSN:
1442-9993
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The habitat use, seasonality and demography of the broadnose sevengill shark Notorynchus cepedianus were investigated in central Patagonia, where a data gap exists for the species. Catch and effort and video-derived indices indicated high relative abundance of sharks during warm months. Video stations revealed differences in the spatial use by sharks, being more frequently observed in the inner section of the bay. Complementary tagging efforts evidenced both a seasonal residence pattern and site fidelity between consecutive warm seasons. Juveniles outnumbered adults, which suggests that they may use the study area as a secondary nursing ground. Evidence from spontaneous regurgitation further suggests that prey abundance may be driving the seasonal occurrence of sharks in the region. This study allows for a more comprehensive understanding of the population structure and dynamics of sevengill sharks in the Southwest Atlantic.
Palabras clave:
CALETA MALASPINA
,
SEASONAL OCCURRENCE
,
SOUTHWEST ATLANTIC
,
BATIED STATIONS
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CESIMAR)
Articulos de CENTRO PARA EL ESTUDIO DE SISTEMAS MARINOS
Articulos de CENTRO PARA EL ESTUDIO DE SISTEMAS MARINOS
Citación
Irigoyen, Alejo Joaquin; Bovcon, Nelson; Trobbiani, Gastón Andres; De Wysiecki, Agustín M.; Argemi, Federico; et al.; Habitat use, seasonality and demography of the broadnose sevengill shark Notorynchus cepedianus in central Patagonia: Another piece of the puzzle; Wiley Blackwell Publishing, Inc; Austral Ecology; 44; 8; 12-2019; 1463-1470
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