Exploitation of coastal fish communities by harbour porpoises Phocoena phocoena during nursing periods in German Baltic waters.
Baltic sub-populations of harbour porpoises Phocoena phocoena meet in in Southwestern waters in Spring when females reach the coastal areas for calving and nursing. In Autumn they separate again for reproduction : the Belt sea populations westwards in the Kattegat/Skarregat region, the Baltic proper...
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ftorbi:oai:orbi.ulg.ac.be:2268/207168 2024-04-21T08:04:13+00:00 Exploitation of coastal fish communities by harbour porpoises Phocoena phocoena during nursing periods in German Baltic waters. Pinzone, Marianna Michel, Loïc Gallus, Anja Brundiers, Katharina Sturaro, Nicolas Adreasen, Heidi Dähne, Michael Lepoint, Gilles Siebert, Ursula Das, Krishna Benke, Harald 2016-12-11 179, 83 https://orbi.uliege.be/handle/2268/207168 en eng https://orbi.uliege.be/handle/2268/207168 info:hdl:2268/207168 restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess Benelux Zoology Conference, Antwerp, Belgium [BE], from 11-12-2016 to 12-12-2016 harbour porpoise Baltic Sea food web stable isotopes diet Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie conference paper not in proceedings http://purl.org/coar/resource_type/c_18cp info:eu-repo/semantics/conferencePaper 2016 ftorbi 2024-03-27T14:48:09Z Baltic sub-populations of harbour porpoises Phocoena phocoena meet in in Southwestern waters in Spring when females reach the coastal areas for calving and nursing. In Autumn they separate again for reproduction : the Belt sea populations westwards in the Kattegat/Skarregat region, the Baltic proper population northwards in the central basin. The increased number of juvenile and newborn strandings along the German Baltic coasts give evidence for a possible existence of local calving grounds in this area. Calving and nursing habitats are the most important areas for management purposes. This project aimed to describe inhabitancy and diet of females and calves along the German Baltic coast, in order to achieve effective conservation measures. Nitrogen, carbon and, for the first time, sulphur stable isotopes (δ13C, δ15N and δ34S) were analysed in coastal species of fish and invertebrates in spring, autumn and winter 2015/2016 and in four different areas, to assess for seasonal and geographical variation of porpoises habitat use. The structure of ecological niches was inferred within and between communities using the SIBER model, and was compared to results from stomach content analysis. N, C and S values of fish and invertebrates strongly varied, seasonally and geographically, as a consequence of environmental factors characteristic of each sampling area. Additionally, each species presented large isotopic variability, suggesting possible intraspecific dietary specialisations. Females δ13C and δ34S signatures integrated both open-waters and coastal feeding, while juveniles presented a more coastal distribution. The absence of difference in δ15N values between age classes confirmed persistence of milk assimilation from the mothers. Niches structures and overlaps and stomach content analysis suggested gobies (Potamoschistus spp and Neogobius spp in particular), crabs and small coastal fish (ex. three-spined stickleback) as the main preys of juveniles. The integration of all three stable isotopes together permitted to ... Conference Object Harbour porpoise Phocoena phocoena University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
harbour porpoise Baltic Sea food web stable isotopes diet Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie |
spellingShingle |
harbour porpoise Baltic Sea food web stable isotopes diet Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie Pinzone, Marianna Michel, Loïc Gallus, Anja Brundiers, Katharina Sturaro, Nicolas Adreasen, Heidi Dähne, Michael Lepoint, Gilles Siebert, Ursula Das, Krishna Benke, Harald Exploitation of coastal fish communities by harbour porpoises Phocoena phocoena during nursing periods in German Baltic waters. |
topic_facet |
harbour porpoise Baltic Sea food web stable isotopes diet Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie |
description |
Baltic sub-populations of harbour porpoises Phocoena phocoena meet in in Southwestern waters in Spring when females reach the coastal areas for calving and nursing. In Autumn they separate again for reproduction : the Belt sea populations westwards in the Kattegat/Skarregat region, the Baltic proper population northwards in the central basin. The increased number of juvenile and newborn strandings along the German Baltic coasts give evidence for a possible existence of local calving grounds in this area. Calving and nursing habitats are the most important areas for management purposes. This project aimed to describe inhabitancy and diet of females and calves along the German Baltic coast, in order to achieve effective conservation measures. Nitrogen, carbon and, for the first time, sulphur stable isotopes (δ13C, δ15N and δ34S) were analysed in coastal species of fish and invertebrates in spring, autumn and winter 2015/2016 and in four different areas, to assess for seasonal and geographical variation of porpoises habitat use. The structure of ecological niches was inferred within and between communities using the SIBER model, and was compared to results from stomach content analysis. N, C and S values of fish and invertebrates strongly varied, seasonally and geographically, as a consequence of environmental factors characteristic of each sampling area. Additionally, each species presented large isotopic variability, suggesting possible intraspecific dietary specialisations. Females δ13C and δ34S signatures integrated both open-waters and coastal feeding, while juveniles presented a more coastal distribution. The absence of difference in δ15N values between age classes confirmed persistence of milk assimilation from the mothers. Niches structures and overlaps and stomach content analysis suggested gobies (Potamoschistus spp and Neogobius spp in particular), crabs and small coastal fish (ex. three-spined stickleback) as the main preys of juveniles. The integration of all three stable isotopes together permitted to ... |
format |
Conference Object |
author |
Pinzone, Marianna Michel, Loïc Gallus, Anja Brundiers, Katharina Sturaro, Nicolas Adreasen, Heidi Dähne, Michael Lepoint, Gilles Siebert, Ursula Das, Krishna Benke, Harald |
author_facet |
Pinzone, Marianna Michel, Loïc Gallus, Anja Brundiers, Katharina Sturaro, Nicolas Adreasen, Heidi Dähne, Michael Lepoint, Gilles Siebert, Ursula Das, Krishna Benke, Harald |
author_sort |
Pinzone, Marianna |
title |
Exploitation of coastal fish communities by harbour porpoises Phocoena phocoena during nursing periods in German Baltic waters. |
title_short |
Exploitation of coastal fish communities by harbour porpoises Phocoena phocoena during nursing periods in German Baltic waters. |
title_full |
Exploitation of coastal fish communities by harbour porpoises Phocoena phocoena during nursing periods in German Baltic waters. |
title_fullStr |
Exploitation of coastal fish communities by harbour porpoises Phocoena phocoena during nursing periods in German Baltic waters. |
title_full_unstemmed |
Exploitation of coastal fish communities by harbour porpoises Phocoena phocoena during nursing periods in German Baltic waters. |
title_sort |
exploitation of coastal fish communities by harbour porpoises phocoena phocoena during nursing periods in german baltic waters. |
publishDate |
2016 |
url |
https://orbi.uliege.be/handle/2268/207168 |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
Benelux Zoology Conference, Antwerp, Belgium [BE], from 11-12-2016 to 12-12-2016 |
op_relation |
https://orbi.uliege.be/handle/2268/207168 info:hdl:2268/207168 |
op_rights |
restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess |
_version_ |
1796943853941424128 |