A remarkable increase in the number of stranded harbour porpoises Phocoena phocoena at the Belgian coast
The harbour porpoise Phocoena phocoena is by far the most common cetacean in the North Sea. It was considered common in the southern part of the North Sea in the first half of the 20th century but since the 1960ies numbers gradually decreased. In the 1970ies and 1980ies the species probably was virt...
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ftvliz:oai:oma.vliz.be:71017 2023-05-15T16:33:28+02:00 A remarkable increase in the number of stranded harbour porpoises Phocoena phocoena at the Belgian coast Haelters, J. Kerckhof, F. 2005 application/pdf https://www.vliz.be/imisdocs/publications/375292.pdf en eng https://www.vliz.be/imisdocs/publications/375292.pdf info:eu-repo/semantics/openAccess +biinib+Mees+J.+iet+al.i+iVLIZ+Young+Scientists+Day+Brugge+Belgium+25+February+2005+book+of+abstracts.+VLIZ+Special+Publicationi+20+pp.+39 Stranding Phocoena phocoena (Linnaeus 1758) ANE Belgium Belgian Coast info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2005 ftvliz 2022-05-01T08:49:11Z The harbour porpoise Phocoena phocoena is by far the most common cetacean in the North Sea. It was considered common in the southern part of the North Sea in the first half of the 20th century but since the 1960ies numbers gradually decreased. In the 1970ies and 1980ies the species probably was virtually absent from Belgian waters. Since the early 1990ies the abundance of the porpoise has increased markedly in the coastal waters of Belgium and The Netherlands. During the last years, especially between January and April, frequent sightings were made in Belgian waters, even from the coast. The higher number of sightings is reflected in the number of strandings and bycatches. While in the 1980ies and early 1990ies, only 3 to 6 porpoises washed ashore each year, this number gradually increased, and in 2003 and 2004 respectively 37 and 41 porpoises were found on Belgian beaches. Autopsies were performed on all stranded animals, and especially in 2004 bycatch in fishing gear was identified as a major cause of death. Particularly gill net fisheries, otherwise considered as a relatively environmentally friendly fishing technique, is known to incidentally kill thousands of porpoises each year in the North Sea. In Belgium a large proportion of the incidental catches had undoubtedly occurred in recreational beach gillnet fisheries. Several explanations for the increased number of porpoises in the southern North Sea are put forward. It is unlikely that the higher numbers are the consequence of a growing population size. We believe that in recent years a change in the migration patterns has occurred. This was possibly caused by changed environmental conditions, causing a change in the feeding opportunities for this species in the North Sea. Article in Journal/Newspaper Harbour porpoise Phocoena phocoena Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
topic |
Stranding Phocoena phocoena (Linnaeus 1758) ANE Belgium Belgian Coast |
spellingShingle |
Stranding Phocoena phocoena (Linnaeus 1758) ANE Belgium Belgian Coast Haelters, J. Kerckhof, F. A remarkable increase in the number of stranded harbour porpoises Phocoena phocoena at the Belgian coast |
topic_facet |
Stranding Phocoena phocoena (Linnaeus 1758) ANE Belgium Belgian Coast |
description |
The harbour porpoise Phocoena phocoena is by far the most common cetacean in the North Sea. It was considered common in the southern part of the North Sea in the first half of the 20th century but since the 1960ies numbers gradually decreased. In the 1970ies and 1980ies the species probably was virtually absent from Belgian waters. Since the early 1990ies the abundance of the porpoise has increased markedly in the coastal waters of Belgium and The Netherlands. During the last years, especially between January and April, frequent sightings were made in Belgian waters, even from the coast. The higher number of sightings is reflected in the number of strandings and bycatches. While in the 1980ies and early 1990ies, only 3 to 6 porpoises washed ashore each year, this number gradually increased, and in 2003 and 2004 respectively 37 and 41 porpoises were found on Belgian beaches. Autopsies were performed on all stranded animals, and especially in 2004 bycatch in fishing gear was identified as a major cause of death. Particularly gill net fisheries, otherwise considered as a relatively environmentally friendly fishing technique, is known to incidentally kill thousands of porpoises each year in the North Sea. In Belgium a large proportion of the incidental catches had undoubtedly occurred in recreational beach gillnet fisheries. Several explanations for the increased number of porpoises in the southern North Sea are put forward. It is unlikely that the higher numbers are the consequence of a growing population size. We believe that in recent years a change in the migration patterns has occurred. This was possibly caused by changed environmental conditions, causing a change in the feeding opportunities for this species in the North Sea. |
format |
Article in Journal/Newspaper |
author |
Haelters, J. Kerckhof, F. |
author_facet |
Haelters, J. Kerckhof, F. |
author_sort |
Haelters, J. |
title |
A remarkable increase in the number of stranded harbour porpoises Phocoena phocoena at the Belgian coast |
title_short |
A remarkable increase in the number of stranded harbour porpoises Phocoena phocoena at the Belgian coast |
title_full |
A remarkable increase in the number of stranded harbour porpoises Phocoena phocoena at the Belgian coast |
title_fullStr |
A remarkable increase in the number of stranded harbour porpoises Phocoena phocoena at the Belgian coast |
title_full_unstemmed |
A remarkable increase in the number of stranded harbour porpoises Phocoena phocoena at the Belgian coast |
title_sort |
remarkable increase in the number of stranded harbour porpoises phocoena phocoena at the belgian coast |
publishDate |
2005 |
url |
https://www.vliz.be/imisdocs/publications/375292.pdf |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
+biinib+Mees+J.+iet+al.i+iVLIZ+Young+Scientists+Day+Brugge+Belgium+25+February+2005+book+of+abstracts.+VLIZ+Special+Publicationi+20+pp.+39 |
op_relation |
https://www.vliz.be/imisdocs/publications/375292.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766023159025238016 |