The stranding anomaly as population indicator: the case of harbour porpoise Phocoena phocoena in North-Western Europe.
peer reviewed Ecological indicators for monitoring strategies are expected to combine three major characteristics: ecological significance, statistical credibility, and cost-effectiveness. Strategies based on stranding networks rank highly in cost-effectiveness, but their ecological significance and...
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2013
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Online Access: | https://orbi.uliege.be/handle/2268/158950 https://orbi.uliege.be/bitstream/2268/158950/1/journal.pone.0062180.pdf https://doi.org/10.1371/journal.pone.0062180 |
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ftorbi:oai:orbi.ulg.ac.be:2268/158950 2024-04-21T08:04:11+00:00 The stranding anomaly as population indicator: the case of harbour porpoise Phocoena phocoena in North-Western Europe. Peltier, Helene Baagoe, Hans J. Camphuysen, Kees C. J. Czeck, Richard Dabin, Willy Daniel, Pierre Deaville, Rob Haelters, Jan Jauniaux, Thierry Jensen, Lasse F. Jepson, Paul D. Keijl, Guido O. Siebert, Ursula Van Canneyt, Olivier Ridoux, Vincent 2013 https://orbi.uliege.be/handle/2268/158950 https://orbi.uliege.be/bitstream/2268/158950/1/journal.pone.0062180.pdf https://doi.org/10.1371/journal.pone.0062180 en eng Public Library of Science urn:issn:1932-6203 https://orbi.uliege.be/handle/2268/158950 info:hdl:2268/158950 https://orbi.uliege.be/bitstream/2268/158950/1/journal.pone.0062180.pdf doi:10.1371/journal.pone.0062180 scopus-id:2-s2.0-84876441475 info:pmid:23614031 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess PLoS ONE, 8 (4), e62180 (2013) Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2013 ftorbi https://doi.org/10.1371/journal.pone.0062180 2024-03-27T14:53:33Z peer reviewed Ecological indicators for monitoring strategies are expected to combine three major characteristics: ecological significance, statistical credibility, and cost-effectiveness. Strategies based on stranding networks rank highly in cost-effectiveness, but their ecological significance and statistical credibility are disputed. Our present goal is to improve the value of stranding data as population indicator as part of monitoring strategies by constructing the spatial and temporal null hypothesis for strandings. The null hypothesis is defined as: small cetacean distribution and mortality are uniform in space and constant in time. We used a drift model to map stranding probabilities and predict stranding patterns of cetacean carcasses under H0 across the North Sea, the Channel and the Bay of Biscay, for the period 1990-2009. As the most common cetacean occurring in this area, we chose the harbour porpoise Phocoena phocoena for our modelling. The difference between these strandings expected under H0 and observed strandings is defined as the stranding anomaly. It constituted the stranding data series corrected for drift conditions. Seasonal decomposition of stranding anomaly suggested that drift conditions did not explain observed seasonal variations of porpoise strandings. Long-term stranding anomalies increased first in the southern North Sea, the Channel and Bay of Biscay coasts, and finally the eastern North Sea. The hypothesis of changes in porpoise distribution was consistent with local visual surveys, mostly SCANS surveys (1994 and 2005). This new indicator could be applied to cetacean populations across the world and more widely to marine megafauna. Article in Journal/Newspaper Harbour porpoise Phocoena phocoena University of Liège: ORBi (Open Repository and Bibliography) PLoS ONE 8 4 e62180 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie |
spellingShingle |
Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie Peltier, Helene Baagoe, Hans J. Camphuysen, Kees C. J. Czeck, Richard Dabin, Willy Daniel, Pierre Deaville, Rob Haelters, Jan Jauniaux, Thierry Jensen, Lasse F. Jepson, Paul D. Keijl, Guido O. Siebert, Ursula Van Canneyt, Olivier Ridoux, Vincent The stranding anomaly as population indicator: the case of harbour porpoise Phocoena phocoena in North-Western Europe. |
topic_facet |
Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie |
description |
peer reviewed Ecological indicators for monitoring strategies are expected to combine three major characteristics: ecological significance, statistical credibility, and cost-effectiveness. Strategies based on stranding networks rank highly in cost-effectiveness, but their ecological significance and statistical credibility are disputed. Our present goal is to improve the value of stranding data as population indicator as part of monitoring strategies by constructing the spatial and temporal null hypothesis for strandings. The null hypothesis is defined as: small cetacean distribution and mortality are uniform in space and constant in time. We used a drift model to map stranding probabilities and predict stranding patterns of cetacean carcasses under H0 across the North Sea, the Channel and the Bay of Biscay, for the period 1990-2009. As the most common cetacean occurring in this area, we chose the harbour porpoise Phocoena phocoena for our modelling. The difference between these strandings expected under H0 and observed strandings is defined as the stranding anomaly. It constituted the stranding data series corrected for drift conditions. Seasonal decomposition of stranding anomaly suggested that drift conditions did not explain observed seasonal variations of porpoise strandings. Long-term stranding anomalies increased first in the southern North Sea, the Channel and Bay of Biscay coasts, and finally the eastern North Sea. The hypothesis of changes in porpoise distribution was consistent with local visual surveys, mostly SCANS surveys (1994 and 2005). This new indicator could be applied to cetacean populations across the world and more widely to marine megafauna. |
format |
Article in Journal/Newspaper |
author |
Peltier, Helene Baagoe, Hans J. Camphuysen, Kees C. J. Czeck, Richard Dabin, Willy Daniel, Pierre Deaville, Rob Haelters, Jan Jauniaux, Thierry Jensen, Lasse F. Jepson, Paul D. Keijl, Guido O. Siebert, Ursula Van Canneyt, Olivier Ridoux, Vincent |
author_facet |
Peltier, Helene Baagoe, Hans J. Camphuysen, Kees C. J. Czeck, Richard Dabin, Willy Daniel, Pierre Deaville, Rob Haelters, Jan Jauniaux, Thierry Jensen, Lasse F. Jepson, Paul D. Keijl, Guido O. Siebert, Ursula Van Canneyt, Olivier Ridoux, Vincent |
author_sort |
Peltier, Helene |
title |
The stranding anomaly as population indicator: the case of harbour porpoise Phocoena phocoena in North-Western Europe. |
title_short |
The stranding anomaly as population indicator: the case of harbour porpoise Phocoena phocoena in North-Western Europe. |
title_full |
The stranding anomaly as population indicator: the case of harbour porpoise Phocoena phocoena in North-Western Europe. |
title_fullStr |
The stranding anomaly as population indicator: the case of harbour porpoise Phocoena phocoena in North-Western Europe. |
title_full_unstemmed |
The stranding anomaly as population indicator: the case of harbour porpoise Phocoena phocoena in North-Western Europe. |
title_sort |
stranding anomaly as population indicator: the case of harbour porpoise phocoena phocoena in north-western europe. |
publisher |
Public Library of Science |
publishDate |
2013 |
url |
https://orbi.uliege.be/handle/2268/158950 https://orbi.uliege.be/bitstream/2268/158950/1/journal.pone.0062180.pdf https://doi.org/10.1371/journal.pone.0062180 |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
PLoS ONE, 8 (4), e62180 (2013) |
op_relation |
urn:issn:1932-6203 https://orbi.uliege.be/handle/2268/158950 info:hdl:2268/158950 https://orbi.uliege.be/bitstream/2268/158950/1/journal.pone.0062180.pdf doi:10.1371/journal.pone.0062180 scopus-id:2-s2.0-84876441475 info:pmid:23614031 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0062180 |
container_title |
PLoS ONE |
container_volume |
8 |
container_issue |
4 |
container_start_page |
e62180 |
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