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EVIDENCE OF RECENT POPULATION INCREASES IN COMMON EIDERS BREEDING IN LABRADOR
Author(s) -
CHAULK KEITH,
ROBERTSON GREGORY J.,
COLLINS BRIAN T.,
MONTEVECCHI WILLIAM A.,
TURNER BRUCE
Publication year - 2005
Publication title -
the journal of wildlife management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.94
H-Index - 111
eISSN - 1937-2817
pISSN - 0022-541X
DOI - 10.2193/0022-541x(2005)069[0805:eorpii]2.0.co;2
Subject(s) - eider , population , geography , bay , fishery , demography , biology , archaeology , sociology
Populations of several sea ducks are declining\udacross their North American ranges (Sea Duck\udJoint Venture Management Board 2001), including\udpopulations of all 4 eider species (Somateria spp.\udand Polysticta steller; Kertell 1991, Stehn et al. 1993,\udGratto-Trevor et al. 1998). Declines in common\udeider populations have been documented in\udGreenland, Hudson Bay, and Alaska (Robertson\udand Gilchrist 1998, Sudyam et al. 2000, Merkel\ud2004). Reasons behind these population decreases\udvary, and many are unclear. Factors identified as\udcausing these declines include human disturbance,\udoverharvesting, and climatic events (Robertson and\udGilchrist 1998, Suydam et al. 2000, Merkel 2004).\udHowever, not all common eider populations in the\udnorth are decreasing; Christensen and Falk (2000)\udrecently found evidence of population increase in\udan eider population in Northwest Greenland, while\udothers have documented increases in Hudson\udStrait (Hipfner et al. 2001, Falardeau et al. 2003)