Observations on the Behavior of the New Zealand Fur Seal (Arctocephalus Forsteri)

Abstract

This paper discusses behavioral postures, calls, and sequences of the New Zealand fur seal (Arctocephalus forsteri) recorded from 1967 to 1969. A. forsteri was decimated by sealers prior to the early 1900s and although numbers have increased over the past 50 years, it remains one of the least known pinnipeds. Behavior was studied in a breeding and in a nonbreeding colony. Numbers in the breeding colony did not show marked seasonal change but there were changes in proportions of the sexes and various age classes present. the annual cycle is described insofar as it is known at present. Much of the agonistic behavior of A. forsteri is ritualized and six associated postures and three calls are described. the full neck display is one of the most important postures and appears to function as a threat by which males are able to assess another’s status without fighting. No data on behavior at the peak reproductive period, mid-November to late December, are available. the behavioral sequence by which a female locates her pup appears stereotyped. Vocalization and sight are important initially and olfactory recognition of the pup by the female gives final confirmation. Observations on locomotion, reactions to temperature, and reaction to humans are included.