Observer variability in pinniped counts: Ground-based enumeration of walruses at haul-out sites

Marine Mammal Science

Volumn 21, Issue 1, 2005, Pages 108-120

  Udevitz, M S ^a   Jay, C V ^a   Cody, M B ^b  

^a U S GEOLOGICAL SURVEY   (United States)

^b Marine Mammals Management   (United States)

Author keywords

Aggregation; Group size; Observer bias; Observer error; Odobenus rosmarus; Pacific walrus; Pinniped; Population monitoring; Terrestrial haul outs; Trend estimation

Indexed keywords

ACCURACY ASSESSMENT; ERROR ANALYSIS; HAULOUT BEHAVIOUR; OBSERVATIONAL METHOD; PINNIPED; POPULATION ESTIMATION;

ALASKA; BRISTOL BAY; NORTH AMERICA; UNITED STATES; WESTERN HEMISPHERE; WORLD;

ODOBENIDAE; ODOBENUS; ODOBENUS ROSMARUS; ODOBENUS ROSMARUS DIVERGENS; PHOCIDAE; PINNIPEDIA;

EID: 12244302263     PISSN: 08240469     EISSN: None     Source Type: Journal    
DOI: 10.1111/j.1748-7692.2005.tb01211.x     Document Type: Article

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