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Volume 38- Number 2 - 2003
Article


Reproductive events of southern sea lion, Otaria flavescens (Shaw 1800), in the north of Chile (eastern south Pacific)

Jorge Acevedo R.1,2, Anelio Aguayo–Lobo1,2 & Walter Sielfeld K.3

 

(1) Centro de Estudios del Cuaternario (CEQUA). Avda. Bulnes 01855, Punta Arenas, Chile.
(2) Programa de Mamíferos Marinos, Departamento Científico del Instituto Antártico Chileno, Plaza Muñoz Gamero 1055, Punta Arenas, Chile.
(3) Departamento de Ciencias del Mar, Universidad Arturo Prat. Casilla 121, Iquique, Chile.

 

E-mail: jacevedo@123mail.cl

 

Studies on the development of the breeding season of southern sea lions have been carried out primarily in populations from Uruguay and Argentina, western south Atlantic; scarce information has been published from populations of Peru and Chile. The objective of this contribution is to describe the development of the breeding season of the southern sea lion, during two consecutive seasons in the area of Punta Negra, north of Chile.
The development of the reproductive events in the Punta Negra colony presented a high annual synchronization, extending from the third week of December till May, with a climax of the reproductive events in February, being the dynamics during the breeding period similar to that informed for other colonies, although with an out of fase in the breeding season with the Atlantic populations of sea lion.
We conclude that the development of the reproductive events during the both breeding seasons presented a high annual synchronization, with an average out of fase of 2.0-2.5 days, being representative for most of the northern area of Chile, in the southeastern Pacific Ocean.

 

Key words: Southern sea lion, Otaria flavescens, breeding season, Chile

 

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1Laboratorio de Zooplancton, Instituto de Ciencias del Mar y Limnología,Universidad Nacional Autónoma de México. A. P. 70-305, 04510 México, D. F. México
 
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