Results 41 to 50 of about 5,976 (206)

Spatial orientation in echolocating harbour porpoises (Phocoena phocoena) [PDF]

Journal of Experimental Biology, 2005
SUMMARY Studies concerning the echolocation behaviour of odontocetes focus mainly on target detection and discrimination, either in stationary animals or in animals approaching a specific target. We present the first data on the use of echolocation for spatial orientation or navigation.
Verfuss, U.K., Miller, Lee A., Schnitzler, H.-U.   +2 more
openaire   +3 more sources

Polluted porpoises: Generational transfer of organic contaminants in harbour porpoises from the southern North Sea

Science of The Total Environment, 2021
Persistent organic pollutants (POPs), including polychlorinated biphenyls (PCBs), polybrominated diphenylethers (PBDEs) and hexachlorobenzene (HCB), bioaccumulate in marine ecosystems. Top predators contain high levels of POPs in their lipid-rich tissues, which may result in adverse effects on their reproductive, immune and endocrine functions. Harbour
van den Heuvel-Greve, Martine J., van den Brink, Anneke M., Kotterman, Michiel J.J., Kwadijk, Christiaan J.A.F., Geelhoed, Steve C.V., Murphy, Sinéad, van den Broek, Jan, Heesterbeek, Hans, Gröne, Andrea, IJsseldijk, Lonneke L.   +9 more
openaire   +3 more sources

Simulated seal scarer sounds scare porpoises, but not seals: species-specific responses to 12 kHz deterrence sounds [PDF]

Royal Society Open Science, 2017
Acoustic harassment devices (AHD) or ‘seal scarers’ are used extensively, not only to deter seals from fisheries, but also as mitigation tools to deter marine mammals from potentially harmful sound sources, such as offshore pile driving.
Lonnie Mikkelsen, Line Hermannsen, Kristian Beedholm, Peter Teglberg Madsen, Jakob Tougaard   +4 more
doaj   +1 more source

Whale lice (Isocyamus deltobranchium & Isocyamus delphinii; Cyamidae) prevalence in odontocetes off the German and Dutch coasts – morphological and molecular characterization and health implications

International Journal for Parasitology: Parasites and Wildlife, 2021
Whale lice (Cyamidae; Amphipoda) are ectoparasitic crustaceans adapted to the marine environment with cetaceans as their host. There are few reports of cyamids occurring in odontocetes from the North Sea, and long-term studies are lacking.
Kristina Lehnert, Lonneke L. IJsseldijk, May Li Uy, Joy Ometere Boyi, Linde van Schalkwijk, Eveline A.P. Tollenaar, Andrea Gröne, Peter Wohlsein, Ursula Siebert   +8 more
doaj   +1 more source

Histological investigations on the thyroid glands of marine mammals (Phoca vitulina, Phocoena phocoena) and the possible implications of marine pollution [PDF]

, 1993
In 1988 and 1989, thousands of harbor seals (Phoca vitulina) died in the North Sea from phocine distemper infection. The morphology of thyroid glands from 40 harbor seals found dead on the North Sea coastlines of Schleswig-Holstein, Federal Republic of ...
Heidemann, Günter, Horny, H.-P., Schumacher, U., Skirnisson, K., Welsch, U., Zahler, Stefan   +5 more
core   +1 more source

Multiple insights into the reproductive function of harbour porpoises (Phocoena phocoena): An ongoing study

NAMMCO Scientific Publications, 2003
The harbour porpoises kept at the Fjord & Bælt since April 1997 offer a unique opportunity to gain a better understanding of the reproductive function in harbour porpoises, especially in terms of physiological cycle and concomitant behavioural traits.
Geneviève Desportes, Jakob H Kristensen, Deborah Benham, Sandie Wilson, Trine Jepsen, Bodil Korsgaard, Ursula Siebert, Jörg Driver, Mats Amundin, Kirstin Hansen, Gwyneth Shephard   +10 more
doaj   +1 more source

Diurnal variation in harbour porpoise detection – potential implications for management [PDF]

, 2017
Peer reviewedPublisher ...
Brookes, K L, Graham, I M, Scott, B E, Thompson, P M, Williamson, L D   +4 more
core   +2 more sources

Occurrence of anthropogenic and naturally-produced organohalogenated compounds in tissues of Black Sea harbour porpoises [PDF]

, 2010
Harbour porpoises are one of the three cetacean species inhabiting the Black Sea. This is the first study to report on polybrominated diphenyl ethers (PBDEs) and naturally-produced compounds, methoxylated PBDEs (MeO-PBDEs) and polybrominated ...
Blust, Ronny, Covaci, Adrian, Das, Krishna, Neels, Hugo, Weijs, Liesbeth   +4 more
core   +1 more source

Assessment of Harbour Porpoise Bycatch along the Portuguese and Galician Coast: Insights from Strandings over Two Decades

Animals, 2023
The Iberian harbour porpoise population is small and fisheries bycatch has been described as one of its most important threats. Data on harbour porpoise strandings collected by the Portuguese and Galician stranding networks between 2000 and 2020 are ...
Andreia Torres-Pereira, Hélder Araújo, Silvia Silva Monteiro, Marisa Ferreira, Jorge Bastos-Santos, Sara Sá, Lídia Nicolau, Ana Marçalo, Carina Marques, Ana Sofia Tavares, Myriam De Bonis, Pablo Covelo, José Martínez-Cedeira, Alfredo López, Marina Sequeira, José Vingada, Catarina Eira   +16 more
doaj   +1 more source

Echolocation detections and digital video surveys provide reliable estimates of the relative density of harbour porpoises [PDF]

, 2016
Acknowledgements We would like to thank Erik Rexstad and Rob Williams for useful reviews of this manuscript. The collection of visual and acoustic data was funded by the UK Department of Energy & Climate Change, the Scottish Government, Collaborative ...
Beth E. Scott, Buckland S.T., Gareth Bradbury, Isla M. Graham, Jana McPherson, Kate L. Brookes, Laura D. Williamson, Mudge G.P., Paul M. Thompson, Philip S. Hammond, R Core Team   +10 more
core   +2 more sources