The stranding anomaly as population indicator: the case of Harbour Porpoise Phocoena phocoena in North-Western Europe
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 c...
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ftvliz:oai:oma.vliz.be:230848 2023-05-15T16:33:22+02:00 The stranding anomaly as population indicator: the case of Harbour Porpoise Phocoena phocoena in North-Western Europe Peltier, H. Baagøe, H.J. Camphuysen, K.C.J. Czeck, R. Dabin, W. Daniel, P. Deaville, R. Haelters, J. Jauniaux, T. Jensen, L.F. Jepson, P.D. Keijl, G.O. Siebert, U. Van Canneyt, O. Ridoux, V. 2013 application/pdf https://www.vliz.be/imisdocs/publications/258243.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000317911500084 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1371/journal.pone.0062180 https://www.vliz.be/imisdocs/publications/258243.pdf info:eu-repo/semantics/openAccess %3Ci%3EPLoS+One+8%284%29%3C%2Fi%3E%3A+1-14.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1371%2Fjournal.pone.0062180%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1371%2Fjournal.pone.0062180%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2013 ftvliz https://doi.org/10.1371/journal.pone.0062180 2022-05-01T10:07:11Z 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 H-0 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 H-0 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 Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) PLoS ONE 8 4 e62180 |
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Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
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ftvliz |
language |
English |
description |
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 H-0 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 H-0 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, H. Baagøe, H.J. Camphuysen, K.C.J. Czeck, R. Dabin, W. Daniel, P. Deaville, R. Haelters, J. Jauniaux, T. Jensen, L.F. Jepson, P.D. Keijl, G.O. Siebert, U. Van Canneyt, O. Ridoux, V. |
spellingShingle |
Peltier, H. Baagøe, H.J. Camphuysen, K.C.J. Czeck, R. Dabin, W. Daniel, P. Deaville, R. Haelters, J. Jauniaux, T. Jensen, L.F. Jepson, P.D. Keijl, G.O. Siebert, U. Van Canneyt, O. Ridoux, V. The stranding anomaly as population indicator: the case of Harbour Porpoise Phocoena phocoena in North-Western Europe |
author_facet |
Peltier, H. Baagøe, H.J. Camphuysen, K.C.J. Czeck, R. Dabin, W. Daniel, P. Deaville, R. Haelters, J. Jauniaux, T. Jensen, L.F. Jepson, P.D. Keijl, G.O. Siebert, U. Van Canneyt, O. Ridoux, V. |
author_sort |
Peltier, H. |
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 |
publishDate |
2013 |
url |
https://www.vliz.be/imisdocs/publications/258243.pdf |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/wos/000317911500084 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1371/journal.pone.0062180 https://www.vliz.be/imisdocs/publications/258243.pdf |
op_rights |
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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1766023063177003008 |