El Niño'S Effect on South American Pinniped Species

摘要: Abstract Marine mammals living in the tropical upwelling ecosystem of Galapagos and Peru were severely affected by influx warm water during 1982/83 El Nino. The fur seal (Arctocephalus palapapoensis) population suffered considerable mortality; 4 youngest age classes almost completely lost, along with 30% adult population. All larger males, which territorial Nino, disappeared presumably died. sea lion (Zalophus callfornianus wollebaeki) lost most 1982 year class had a greatly reduced birth rate breeding season following High mortality was also reported for South American australis) (Otaria byronia) on southern coast Peru. Periods Nino conditions cause severe disruption food web, thus creating acute shortage both seals lions.