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Status of the White-beaked Dolphin, Lagenorhynchus albirostris, in Canada
Lien, J; Nelson, D; Hai, DJ
AbstractWhite-beaked Dolphins are common and abundant in the north Atlantic. Abundance appears greater in northeastern areas compared to the northwestern Atlantic where its range extends from Davis Strait to the Hague Line on George's Bank, and into U.S. waters. Relationships between populations observed in different areas are not known. Total or local populations are not known to be reduced or depleted. The biology and ecology of this species has been incompletely studied. It occurs in social groups ranging from dozens to hundreds of individuals: there is some indication that groups may segregate based on age/maturity. Sexual maturity occurs in females at lengths from 1.74 to 2.49 m; 50% are mature at 2.42 m. Males are larger at sexual maturity (2.51 to 2.57 m). Factors limiting northwestern Atlantic White-beaked Dolphins may include hunting. incidental entrapments in fishing gear, ice entrapments and, possibly, pollution. Such factors should be monitored carefully but are not, at present, believed to have substantial impacts on the species, although there may be reduction of some local populations. Factors such as ice entrapments, parasites, infections. mass strandings and predation are recognized as naturally occurring mortality and are not presumed to normally limit the species. There is no evidence of any major threat to this species in zones under Canadian jurisdiction. However, careful monitoring of hunting activities in Labrador is recommended and fisheries by-catches should be carefully monitored.
KeywordCetacea Odontoceti Toothed Whales White-beaked Dolphin Dauphin a Nez Blanc Lagenorhynchus Albirostris
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WOS IDWOS:000170068800016
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Mem Univ Newfoundland, Whale Res Grp, St John, NF A1C 5S7, Canada
2.Coll Atlantic, Bar Harbor, ME USA
3.Acad Sinica, Inst Oceanol, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Lien, J,Nelson, D,Hai, DJ. Status of the White-beaked Dolphin, Lagenorhynchus albirostris, in Canada[J]. CANADIAN FIELD-NATURALIST,2001,115(1):118-126.
APA Lien, J,Nelson, D,&Hai, DJ.(2001).Status of the White-beaked Dolphin, Lagenorhynchus albirostris, in Canada.CANADIAN FIELD-NATURALIST,115(1),118-126.
MLA Lien, J,et al."Status of the White-beaked Dolphin, Lagenorhynchus albirostris, in Canada".CANADIAN FIELD-NATURALIST 115.1(2001):118-126.
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