Updated Marine Mammal Distribution and Abundance Estimates in British Columbia
Information relating to the distribution and abundance of species is critical for effective conservation and management. For many species, including cetacean species of conservation concern, abundance estimates are lacking, out of date and/or highly uncertain. Systematic, line-transect marine mammal...
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2015
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ftinstsciencepol:oai:www.wellbeingintlstudiesrepository.org:popdhab-1002 2023-06-18T03:39:57+02:00 Updated Marine Mammal Distribution and Abundance Estimates in British Columbia Best, Benjamin D. Fox, Caroline H. Williams, Rob Halpin, Patrick H. Paquet, Paul C. 2015-01-01T08:00:00Z application/pdf https://www.wellbeingintlstudiesrepository.org/popdhab/3 https://www.wellbeingintlstudiesrepository.org/context/popdhab/article/1002/viewcontent/cetacean.pdf https://www.wellbeingintlstudiesrepository.org/context/popdhab/article/1002/filename/0/type/additional/viewcontent/catacean_supplement.pdf unknown WBI Studies Repository https://www.wellbeingintlstudiesrepository.org/popdhab/3 https://www.wellbeingintlstudiesrepository.org/context/popdhab/article/1002/viewcontent/cetacean.pdf https://www.wellbeingintlstudiesrepository.org/context/popdhab/article/1002/filename/0/type/additional/viewcontent/catacean_supplement.pdf Population Distribution and Habitat Collection survey-vessel abundance estimate distribution conservation British Columbia Pacific Ocean Humpback Whale Killer Whale Common Minke Whale Fin Whale Pacific White-Sided Dolphin Steller Sea Lion Elephant Seal Harbour Seal Harbour Porpoise Dall's Porpoise Northern Hemisphere Animal Studies Environmental Studies Population Biology text 2015 ftinstsciencepol 2023-06-04T20:20:03Z Information relating to the distribution and abundance of species is critical for effective conservation and management. For many species, including cetacean species of conservation concern, abundance estimates are lacking, out of date and/or highly uncertain. Systematic, line-transect marine mammal surveys were conducted in British Columbia’s (BC) coastal waters over multiple years and seasons (summer 2004, 2005, 2008, and spring/autumn 2007). In total, 10,057km of transects were surveyed in an 83,547km2 study area. Abundance estimates were calculated using two different methods: Conventional Distance Sampling (CDS) and Density Surface Modelling (DSM). CDS generates a single density estimate for each stratum, whereas DSM explicitly models spatial variation and offers potential for greater precision by incorporating environmental predictors. Although DSM yields a more relevant product for the purposes of marine spatial planning, CDS has proven to be useful in cases where there are fewer observations available for seasonal and inter-annual comparison, particularly for the scarcely observed elephant seal. The summer abundance estimates (with lower and upper 95% confidence intervals; all DSM method unless otherwise stated), assuming certain trackline detection (underestimates true population size) were: harbour porpoise (Phocoena phocoena) 8,091 (4,885–13,401); Dall’s porpoise (Phocoenoides dalli) 5,303 (4,638–6,064); Pacific white-sided dolphin (Lagenorhynchus obliquidens) 22,160 (16,522–29,721); humpback whale (Megaptera novaeangliae) 1,092 (993–1,200); fin whale (Balaenoptera physalus) 329 (274–395); killer whale (all ecotypes; Orcinus orca), 371 (222–621); common minke whale (B. acutorostrata) 522 (295–927); harbour seal (total; Phoca vitulina) 24,916 (19,666–31,569); Steller sea lion (total; Eumetopias jubatus) 4,037 (1,100–14,815); and northern elephant seal (CDS method; Mirounga angustirostris) 65 (35–121). Abundance estimates are provided on a stratum-specific basis with additional estimates provided for ... Text Balaenoptera physalus Elephant Seal Fin whale Harbour porpoise harbour seal Humpback Whale Killer Whale Megaptera novaeangliae minke whale Orca Orcinus orca Phoca vitulina Phocoena phocoena Killer whale The Humane Society of the United States, Institute for Science and Policy: Animal Studies Repository Pacific |
institution |
Open Polar |
collection |
The Humane Society of the United States, Institute for Science and Policy: Animal Studies Repository |
op_collection_id |
ftinstsciencepol |
language |
unknown |
topic |
survey-vessel abundance estimate distribution conservation British Columbia Pacific Ocean Humpback Whale Killer Whale Common Minke Whale Fin Whale Pacific White-Sided Dolphin Steller Sea Lion Elephant Seal Harbour Seal Harbour Porpoise Dall's Porpoise Northern Hemisphere Animal Studies Environmental Studies Population Biology |
spellingShingle |
survey-vessel abundance estimate distribution conservation British Columbia Pacific Ocean Humpback Whale Killer Whale Common Minke Whale Fin Whale Pacific White-Sided Dolphin Steller Sea Lion Elephant Seal Harbour Seal Harbour Porpoise Dall's Porpoise Northern Hemisphere Animal Studies Environmental Studies Population Biology Best, Benjamin D. Fox, Caroline H. Williams, Rob Halpin, Patrick H. Paquet, Paul C. Updated Marine Mammal Distribution and Abundance Estimates in British Columbia |
topic_facet |
survey-vessel abundance estimate distribution conservation British Columbia Pacific Ocean Humpback Whale Killer Whale Common Minke Whale Fin Whale Pacific White-Sided Dolphin Steller Sea Lion Elephant Seal Harbour Seal Harbour Porpoise Dall's Porpoise Northern Hemisphere Animal Studies Environmental Studies Population Biology |
description |
Information relating to the distribution and abundance of species is critical for effective conservation and management. For many species, including cetacean species of conservation concern, abundance estimates are lacking, out of date and/or highly uncertain. Systematic, line-transect marine mammal surveys were conducted in British Columbia’s (BC) coastal waters over multiple years and seasons (summer 2004, 2005, 2008, and spring/autumn 2007). In total, 10,057km of transects were surveyed in an 83,547km2 study area. Abundance estimates were calculated using two different methods: Conventional Distance Sampling (CDS) and Density Surface Modelling (DSM). CDS generates a single density estimate for each stratum, whereas DSM explicitly models spatial variation and offers potential for greater precision by incorporating environmental predictors. Although DSM yields a more relevant product for the purposes of marine spatial planning, CDS has proven to be useful in cases where there are fewer observations available for seasonal and inter-annual comparison, particularly for the scarcely observed elephant seal. The summer abundance estimates (with lower and upper 95% confidence intervals; all DSM method unless otherwise stated), assuming certain trackline detection (underestimates true population size) were: harbour porpoise (Phocoena phocoena) 8,091 (4,885–13,401); Dall’s porpoise (Phocoenoides dalli) 5,303 (4,638–6,064); Pacific white-sided dolphin (Lagenorhynchus obliquidens) 22,160 (16,522–29,721); humpback whale (Megaptera novaeangliae) 1,092 (993–1,200); fin whale (Balaenoptera physalus) 329 (274–395); killer whale (all ecotypes; Orcinus orca), 371 (222–621); common minke whale (B. acutorostrata) 522 (295–927); harbour seal (total; Phoca vitulina) 24,916 (19,666–31,569); Steller sea lion (total; Eumetopias jubatus) 4,037 (1,100–14,815); and northern elephant seal (CDS method; Mirounga angustirostris) 65 (35–121). Abundance estimates are provided on a stratum-specific basis with additional estimates provided for ... |
format |
Text |
author |
Best, Benjamin D. Fox, Caroline H. Williams, Rob Halpin, Patrick H. Paquet, Paul C. |
author_facet |
Best, Benjamin D. Fox, Caroline H. Williams, Rob Halpin, Patrick H. Paquet, Paul C. |
author_sort |
Best, Benjamin D. |
title |
Updated Marine Mammal Distribution and Abundance Estimates in British Columbia |
title_short |
Updated Marine Mammal Distribution and Abundance Estimates in British Columbia |
title_full |
Updated Marine Mammal Distribution and Abundance Estimates in British Columbia |
title_fullStr |
Updated Marine Mammal Distribution and Abundance Estimates in British Columbia |
title_full_unstemmed |
Updated Marine Mammal Distribution and Abundance Estimates in British Columbia |
title_sort |
updated marine mammal distribution and abundance estimates in british columbia |
publisher |
WBI Studies Repository |
publishDate |
2015 |
url |
https://www.wellbeingintlstudiesrepository.org/popdhab/3 https://www.wellbeingintlstudiesrepository.org/context/popdhab/article/1002/viewcontent/cetacean.pdf https://www.wellbeingintlstudiesrepository.org/context/popdhab/article/1002/filename/0/type/additional/viewcontent/catacean_supplement.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Balaenoptera physalus Elephant Seal Fin whale Harbour porpoise harbour seal Humpback Whale Killer Whale Megaptera novaeangliae minke whale Orca Orcinus orca Phoca vitulina Phocoena phocoena Killer whale |
genre_facet |
Balaenoptera physalus Elephant Seal Fin whale Harbour porpoise harbour seal Humpback Whale Killer Whale Megaptera novaeangliae minke whale Orca Orcinus orca Phoca vitulina Phocoena phocoena Killer whale |
op_source |
Population Distribution and Habitat Collection |
op_relation |
https://www.wellbeingintlstudiesrepository.org/popdhab/3 https://www.wellbeingintlstudiesrepository.org/context/popdhab/article/1002/viewcontent/cetacean.pdf https://www.wellbeingintlstudiesrepository.org/context/popdhab/article/1002/filename/0/type/additional/viewcontent/catacean_supplement.pdf |
_version_ |
1769004739852238848 |