thumbnail

Patterns of seabird and marine mammal carcass deposition along the central California coast, 1980-1986

Canadian Journal of Zoology

By:
,

Links

  • The Publications Warehouse does not have links to digital versions of this publication at this time

Abstract

At monthly intervals from February 1980 through December 1986, a 14.5-km section of central California coastline was systematically surveyed for beach-cast carcasses of marine birds and mammlas. Five hundred and fifty-four bird carcasses and 194 marine mammal carcasses were found. Common murres, western grebes, and Brandt's cormorants composed 45% of the bird total. California sea lions, sea otters, and harbor seals composed 90% of the mammal total. Several factors appeared to affect patterns of carcass deposition. The El Nino-Southern Oscillation (ENSO) of 1982-1983 was the dominate influence in terms of interannual variation in carcassdeposition. During this ENSO, 56% of the seabirds and 48% of the marine mammals washed ashore. Patterns of intra-annual variation were species specificand were related to animal migration patterns, reproduction, and seasonal changes in weather. Nearshore currents and winds influenced the general area of carcass deposition, while beach subtrate type and local patterns of san deposition influenced the location of carcass carcass deposition on a smaller spatial scale. Weekly surveys along a 1.1-km section of coastline indicated that 62% of bird carcasses and 41% of mammal carcasses remained on the beach less than 9 days. Cause of death determined for only 8% of the carcasses. Oiling was the most common indication of cause of death in birds (6%). Neonates composed 8% of all mammal carcasses.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Patterns of seabird and marine mammal carcass deposition along the central California coast, 1980-1986
Series title:
Canadian Journal of Zoology
Volume
69
Year Published:
1991
Language:
English
Contributing office(s):
Alaska Biological Science Center
Description:
pp. 1149-1155
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Canadian Journal of Zoology
First page:
1149
Last page:
1155
Number of Pages:
7