Status of the White-beaked Dolphin, Lagenorhynchus albirostris, in Canada

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	Status of the White-beaked Dolphin, Lagenorhynchus albirostris, in Canada
	Lien, J ; Nelson, D ; Hai, DJ
	2001
发表期刊	CANADIAN FIELD-NATURALIST
卷号	115 期号:1 页码:118-126
文章类型	Article
摘要	White-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.
关键词	Cetacea Odontoceti Toothed Whales White-beaked Dolphin Dauphin a Nez Blanc Lagenorhynchus Albirostris
收录类别	SCI
语种	英语
WOS记录号	WOS:000170068800016
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/32976
专题	实验海洋生物学重点实验室
作者单位	1.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
推荐引用方式 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.