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Recent Publication on Vocal Repertoire Stability of Harp Seals.

Subject: Recent Publication on Vocal Repertoire Stability of Harp Seals.
From: Arturo Serrano <>
Date: Fri, 12 Apr 2002 08:08:04 -0700
Dear Colleagues,
         The following is a recent publication on harp seal vocalizations
 that may be of interest to some of you.
 Some reprints are available.
 Serrano, A. and Terhune, J. M. Stability of underwater vocal repertoire of
 harp seals (Pagophilus groenlandicus). 2002. Aquatic Mammals. 28(1): 93-101
             Underwater vocalizations of harp seals (Pagophilus
 groenlandicus) were recorded in the Gulf of St. Lawrence, Canada, in late
 February and March over seven years between 1968 and 1999. Harp seals
 produced seventeen call types. No new call types or major changes in the
 repertoire were observed over three decades. Call type proportional usage
 varied significantly among years. Only call type 13 showed significant
 differences in the number per elements per call per year. Call type 14 was
 the only call type that showed a significant difference for element
 duration. The proportional usage of call types varied significantly between
 early and late in the breeding season in four of the seven years. No call
 types showed a significant difference in the number of elements per call
 between early and late in the breeding season. The stable nature of the
 vocal behaviour of harp seals may enhance recognition of the various call
 types and thus serve to enhance conspecific communication.
 Arturo Serrano, PhD
 LGL Limited
 environmental research associates
 22 Fisher Street, P.O. Box 280
 King City, Ontario, L7B 1A6
 Phone (905) 833 6897, Fax (905) 833 1255
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