WHITE-BEAKED DOLPHIN (Lagenorhynchus albirostris): Western North Atlantic Stock
White-beaked dolphins are the more northerly of the two species of Lagenorhynchus in the Northwest Atlantic (Leatherwood et al. 1976). The species is found in waters from southern New England, north to western and southern Greenland and Davis Straits (Leatherwood et al. 1976; CETAP 1982), in the Bar...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.228.2245 2023-05-15T15:39:10+02:00 WHITE-BEAKED DOLPHIN (Lagenorhynchus albirostris): Western North Atlantic Stock Stock Definition Geographic Range The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.228.2245 http://www.nefsc.noaa.gov/nefsc/publications/tm/tm182/pdfs/70.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.228.2245 http://www.nefsc.noaa.gov/nefsc/publications/tm/tm182/pdfs/70.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.nefsc.noaa.gov/nefsc/publications/tm/tm182/pdfs/70.pdf text ftciteseerx 2016-01-07T18:35:59Z White-beaked dolphins are the more northerly of the two species of Lagenorhynchus in the Northwest Atlantic (Leatherwood et al. 1976). The species is found in waters from southern New England, north to western and southern Greenland and Davis Straits (Leatherwood et al. 1976; CETAP 1982), in the Barents Sea and south to at least Portugal (Reeves et al. 1999). Differences in skull features indicate that there are at least two separate stocks, one in the eastern and one in the western North Atlantic (Mikkelsen and Lund 1994). No genetic analyses have been conducted to distinguish the stock structure. In waters off the northeastern U.S. coast, white-beaked dolphin sightings have been concentrated in the western Gulf of Maine and around Cape Cod (CETAP 1982). The limited distribution of this species in U.S. waters has been attributed to opportunistic feeding (CETAP 1982). Prior to the 1970's, white-sided dolphins (L. acutus) in U.S. waters were found primarily offshore on the continental slope, while white-beaked dolphins were found on the continental shelf. During the 1970's, there was an apparent switch in habitat use between these two species. This shift may have been a result of the increase in sand lance in the continental shelf waters (Katona et al. 1993; Kenney et al. 1996). More recently, during late March of 2001, two groups of white-beaked dolphins stranded on Cape Cod beaches (see Other Mortality section below), and one group of 18 animals was seen about 60 nautical miles east of Provincetown, MA during a NEFSC aerial marine mammal survey (NEFSC unpubl data). POPULATION SIZE The total number of white-beaked dolphins in U.S. and Canadian waters is unknown, although one abundance estimate is available for part of the known habitat in U.S. waters, and two estimates are available from Canadian waters (Table 1). A population size of 573 white-beaked dolphins (CV=0.69) was estimated from an aerial survey program Text Barents Sea Greenland Lagenorhynchus albirostris North Atlantic Northwest Atlantic White-beaked dolphin Unknown Barents Sea Greenland Kenney ENVELOPE(-175.467,-175.467,-84.733,-84.733) Mikkelsen ENVELOPE(-67.129,-67.129,-68.749,-68.749) Reeves ENVELOPE(-67.983,-67.983,-67.133,-67.133) |
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Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
White-beaked dolphins are the more northerly of the two species of Lagenorhynchus in the Northwest Atlantic (Leatherwood et al. 1976). The species is found in waters from southern New England, north to western and southern Greenland and Davis Straits (Leatherwood et al. 1976; CETAP 1982), in the Barents Sea and south to at least Portugal (Reeves et al. 1999). Differences in skull features indicate that there are at least two separate stocks, one in the eastern and one in the western North Atlantic (Mikkelsen and Lund 1994). No genetic analyses have been conducted to distinguish the stock structure. In waters off the northeastern U.S. coast, white-beaked dolphin sightings have been concentrated in the western Gulf of Maine and around Cape Cod (CETAP 1982). The limited distribution of this species in U.S. waters has been attributed to opportunistic feeding (CETAP 1982). Prior to the 1970's, white-sided dolphins (L. acutus) in U.S. waters were found primarily offshore on the continental slope, while white-beaked dolphins were found on the continental shelf. During the 1970's, there was an apparent switch in habitat use between these two species. This shift may have been a result of the increase in sand lance in the continental shelf waters (Katona et al. 1993; Kenney et al. 1996). More recently, during late March of 2001, two groups of white-beaked dolphins stranded on Cape Cod beaches (see Other Mortality section below), and one group of 18 animals was seen about 60 nautical miles east of Provincetown, MA during a NEFSC aerial marine mammal survey (NEFSC unpubl data). POPULATION SIZE The total number of white-beaked dolphins in U.S. and Canadian waters is unknown, although one abundance estimate is available for part of the known habitat in U.S. waters, and two estimates are available from Canadian waters (Table 1). A population size of 573 white-beaked dolphins (CV=0.69) was estimated from an aerial survey program |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Stock Definition Geographic Range |
spellingShingle |
Stock Definition Geographic Range WHITE-BEAKED DOLPHIN (Lagenorhynchus albirostris): Western North Atlantic Stock |
author_facet |
Stock Definition Geographic Range |
author_sort |
Stock Definition |
title |
WHITE-BEAKED DOLPHIN (Lagenorhynchus albirostris): Western North Atlantic Stock |
title_short |
WHITE-BEAKED DOLPHIN (Lagenorhynchus albirostris): Western North Atlantic Stock |
title_full |
WHITE-BEAKED DOLPHIN (Lagenorhynchus albirostris): Western North Atlantic Stock |
title_fullStr |
WHITE-BEAKED DOLPHIN (Lagenorhynchus albirostris): Western North Atlantic Stock |
title_full_unstemmed |
WHITE-BEAKED DOLPHIN (Lagenorhynchus albirostris): Western North Atlantic Stock |
title_sort |
white-beaked dolphin (lagenorhynchus albirostris): western north atlantic stock |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.228.2245 http://www.nefsc.noaa.gov/nefsc/publications/tm/tm182/pdfs/70.pdf |
long_lat |
ENVELOPE(-175.467,-175.467,-84.733,-84.733) ENVELOPE(-67.129,-67.129,-68.749,-68.749) ENVELOPE(-67.983,-67.983,-67.133,-67.133) |
geographic |
Barents Sea Greenland Kenney Mikkelsen Reeves |
geographic_facet |
Barents Sea Greenland Kenney Mikkelsen Reeves |
genre |
Barents Sea Greenland Lagenorhynchus albirostris North Atlantic Northwest Atlantic White-beaked dolphin |
genre_facet |
Barents Sea Greenland Lagenorhynchus albirostris North Atlantic Northwest Atlantic White-beaked dolphin |
op_source |
http://www.nefsc.noaa.gov/nefsc/publications/tm/tm182/pdfs/70.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.228.2245 http://www.nefsc.noaa.gov/nefsc/publications/tm/tm182/pdfs/70.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766370630083543040 |