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Accession Number PB2012-114703
Title Biology of the Bearded Seal (Erignathus barbatus) in Alaska, 1961-2009.
Publication Date Mar 2011
Media Count 71p
Personal Author J. Citta J. Crawford L. Quakenbush
Abstract The Alaska Department of Fish and Game (ADF&G) has been monitoring the health and status of bearded seals (Erignathus barbatus) in Alaska since 1962 by collecting information and samples from the Alaska Native subsistence harvest. This monitoring program is especially important because agencies have yet to overcome the logistical constraints necessary to estimate seal abundance in remote, ice covered waters. As such, reliable estimates of bearded seal abundance or population trend are lacking. Retrospective analyses of data provided by this monitoring program allow us to examine how parameters that affect population size may vary in time and how current conditions compare with past conditions. Parameters we monitor that are indicative of population health or status include growth rate, body condition, diet, age distribution, sex ratio, age of maturation, and pregnancy rate. Since 2000, ADF&G has also conducted surveys for local knowledge and hunter preferences and analyzed tissue samples for contaminants and disease. All of these collections rely on the cooperation of coastal subsistence communities.
Keywords Age distributions
Alaska
Bearded seal
Bearded seal (Erignathus barbatus)
Body condition
Contaminants
Diet
Disease
Growth rates
Maturity
Pregnancy rate
Sex ratios


 
Source Agency National Marine Fisheries Service
NTIS Subject Category 48B - Natural Resource Management
57Z - Zoology
55E - Physical Meteorology
Corporate Author Alaska Dept. of Fish and Game, Fairbanks. Arctic Marine Mammal Program.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1226
Contract Number N/A

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