Artículo
Do changes in skull size of South American sea lions reflect changes in population density?
Sosa Drouville, Ailin
; Paschetta, Carolina Andrea
; Crespo, Enrique Alberto
; Grandi, Maria Florencia
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Fecha de publicación:
02/2021
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Marine Mammal Science
ISSN:
0824-0469
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Populations of the South American sea lion (SASL, Otaria byronia) have been intensely exploited for leather and oil in different parts of its distribution range throughout the 19th and 20th centuries, generating large changes in abundance. In Patagonia, the SASL population was reduced by more than 90% of its original abundance, and it began to recover after sealing ended. The aim of this work was to assess changes in size and shape of the skull related to changes in population abundance during the last 100 years. Using geometric morphometry techniques, we analyzed 145 individuals (68 males and 77 females) from Patagonia. Skulls were classified by sex, time period (harvest vs. postharvest), and decades of individual's birth. Results indicated that there were differences in skull size but not in shape discriminated by time period. Moreover, individuals of the postharvest period showed a decrease in the skull size during the last two decades, coinciding with the recovery in population abundance. Our results suggest the existence of a density-dependence response in somatic growth of SASL population of Patagonia.
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
Articulos(IPCSH)
Articulos de INSTITUTO PATAGONICO DE CIENCIAS SOCIALES Y HUMANAS
Articulos de INSTITUTO PATAGONICO DE CIENCIAS SOCIALES Y HUMANAS
Citación
Sosa Drouville, Ailin; Paschetta, Carolina Andrea; Crespo, Enrique Alberto; Grandi, Maria Florencia; Do changes in skull size of South American sea lions reflect changes in population density?; Wiley Blackwell Publishing, Inc; Marine Mammal Science; 37; 3; 2-2021; 934-948
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