Abundance and distribution of the harbour porpoise ( Phocoena phocoena ) on the north coast of Anglesey, Wales, UK
A three year study was undertaken during 2002 to 2004 from May to September to estimate abundance and density of harbour porpoises on the north coast of Anglesey, Wales, UK. There were no ecological data regarding the harbour porpoises in Anglesey waters so the ability to influence conservation meas...
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Online Access: | http://dx.doi.org/10.1017/s0025315408002579 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315408002579 |
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crcambridgeupr:10.1017/s0025315408002579 2024-04-07T07:53:00+00:00 Abundance and distribution of the harbour porpoise ( Phocoena phocoena ) on the north coast of Anglesey, Wales, UK Shucksmith, Richard Jones, Nia H. Stoyle, George W. Davies, Andrew Dicks, Emily F. 2008 http://dx.doi.org/10.1017/s0025315408002579 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315408002579 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 89, issue 5, page 1051-1058 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 2008 crcambridgeupr https://doi.org/10.1017/s0025315408002579 2024-03-08T00:37:03Z A three year study was undertaken during 2002 to 2004 from May to September to estimate abundance and density of harbour porpoises on the north coast of Anglesey, Wales, UK. There were no ecological data regarding the harbour porpoises in Anglesey waters so the ability to influence conservation measures was highly constrained. Boat based transects using distance sampling techniques were applied so a robust estimate of density and abundance could be attained. The study area consisted of a block approximately 489 km 2 extending from the east of Point Lynas to the west of South Stack on north coast of Anglesey. The study area was divided into 5 blocks consisting of 31 perpendicular transect lines to the shore. Each of the transect lines were surveyed 1–5 times by the end of the three year study. Based on the assumption that g(0) = 1 the density of harbour porpoises for the 489 km 2 study site was estimated to be 0.630 individuals/km 2 (CV = 0.20) and the abundance is estimated to be 309 individuals (CV = 0.20). Heterogeneity in density and abundance was observed across the 5 blocks which showed Point Lynas and South Stack to have the highest densities. This distribution was closely associated to fine-scale oceanographic features which cause prey to be concentrated and may facilitate foraging for harbour porpoises. The study showed that Anglesey provides coastal habitats for the harbour porpoise and was the first study of this kind in North Wales, UK. Article in Journal/Newspaper Harbour porpoise Phocoena phocoena Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 89 5 1051 1058 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Aquatic Science |
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Aquatic Science Shucksmith, Richard Jones, Nia H. Stoyle, George W. Davies, Andrew Dicks, Emily F. Abundance and distribution of the harbour porpoise ( Phocoena phocoena ) on the north coast of Anglesey, Wales, UK |
topic_facet |
Aquatic Science |
description |
A three year study was undertaken during 2002 to 2004 from May to September to estimate abundance and density of harbour porpoises on the north coast of Anglesey, Wales, UK. There were no ecological data regarding the harbour porpoises in Anglesey waters so the ability to influence conservation measures was highly constrained. Boat based transects using distance sampling techniques were applied so a robust estimate of density and abundance could be attained. The study area consisted of a block approximately 489 km 2 extending from the east of Point Lynas to the west of South Stack on north coast of Anglesey. The study area was divided into 5 blocks consisting of 31 perpendicular transect lines to the shore. Each of the transect lines were surveyed 1–5 times by the end of the three year study. Based on the assumption that g(0) = 1 the density of harbour porpoises for the 489 km 2 study site was estimated to be 0.630 individuals/km 2 (CV = 0.20) and the abundance is estimated to be 309 individuals (CV = 0.20). Heterogeneity in density and abundance was observed across the 5 blocks which showed Point Lynas and South Stack to have the highest densities. This distribution was closely associated to fine-scale oceanographic features which cause prey to be concentrated and may facilitate foraging for harbour porpoises. The study showed that Anglesey provides coastal habitats for the harbour porpoise and was the first study of this kind in North Wales, UK. |
format |
Article in Journal/Newspaper |
author |
Shucksmith, Richard Jones, Nia H. Stoyle, George W. Davies, Andrew Dicks, Emily F. |
author_facet |
Shucksmith, Richard Jones, Nia H. Stoyle, George W. Davies, Andrew Dicks, Emily F. |
author_sort |
Shucksmith, Richard |
title |
Abundance and distribution of the harbour porpoise ( Phocoena phocoena ) on the north coast of Anglesey, Wales, UK |
title_short |
Abundance and distribution of the harbour porpoise ( Phocoena phocoena ) on the north coast of Anglesey, Wales, UK |
title_full |
Abundance and distribution of the harbour porpoise ( Phocoena phocoena ) on the north coast of Anglesey, Wales, UK |
title_fullStr |
Abundance and distribution of the harbour porpoise ( Phocoena phocoena ) on the north coast of Anglesey, Wales, UK |
title_full_unstemmed |
Abundance and distribution of the harbour porpoise ( Phocoena phocoena ) on the north coast of Anglesey, Wales, UK |
title_sort |
abundance and distribution of the harbour porpoise ( phocoena phocoena ) on the north coast of anglesey, wales, uk |
publisher |
Cambridge University Press (CUP) |
publishDate |
2008 |
url |
http://dx.doi.org/10.1017/s0025315408002579 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315408002579 |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 89, issue 5, page 1051-1058 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315408002579 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
89 |
container_issue |
5 |
container_start_page |
1051 |
op_container_end_page |
1058 |
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1795668582401572864 |