Results 31 to 40 of about 735 (168)
Frontiers in Marine Science, 2022 Legal requirement in Europe asks for Ecosystem-Based Fisheries Management (EBFM) in European seas, including consideration of trophic interactions and minimization of negative impacts of fishing on food webs and ecosystem functioning. This study presents
Marco Scotti +6 more
doaj +1 more source
Veterinární Medicína, 2014 An adult, female harbour porpoise (Phocoena phocoena relicta) was found stranded on the southern Aegean Sea coast of Turkey. Thirteen holes made by copepods were observed on the lateral sides of the porpoise.
E. Danyer +5 more
doaj +1 more source
Silent porpoise: potential sleeping behaviour identified in wild harbour porpoises
Animal Behaviour, 2017 All animals sleep and it is essential for maintaining optimal brain function. However, cetaceans engage in the unusual practice of unihemispherical sleep, where only half of their brain sleeps at a time, due to their constant need for movement and breathing. Most studies of sleep in cetaceans have occurred in captivity.
Andrew J. Wright +5 more
openaire +3 more sources
Concentrations of chlorinated and brominated contaminants and their metabolites in serum of harbour seals and harbour porpoises [PDF]
Environment International, 2009 Harbour seals (Phoca vitulina) and harbour porpoises (Phocoena phocoena) are top predators in the North Sea and consequently accumulate a variety of pollutants in their tissues. Concentrations of polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and their hydroxylated metabolites (HO-PCBs and HO-PBDEs) were measured in serum of ...
Weijs, Liesbeth +7 more
openaire +6 more sources
NAMMCO Scientific Publications, 2003 The known geographical distribution (based on ship surveys, aerial surveys, incidental sightings, stranding and bycatch data) and the population genetic structure obtained from mitochondria DNA and nuclear DNA (isozymes and microsatellites) data analyses
Liselotte Wesley Andersen
doaj +1 more source
Environment International, 2020 Many endangered marine mammal populations are difficult to study, spread out over large areas, and capturing them for branding and research purposes would be unethical. Yet, they are in urgent need for assessment and conservation actions.
Linnea Cervin +2 more
doaj +1 more source
Testicular morphology and spermatogenesis in harbour porpoises (Phocoena phocoena) [PDF]
Theriogenology, 2019 Knowledge about reproductive parameters in male harbour porpoises such as testicular histology and germ cell maturation as well as seasonal changes in spermatogenesis is scarce. Thus, the aim of the present study was to report changes in the histological appearance of the testicular morphology of neonatal and juvenile harbour porpoises during ...
Kesselring, T +8 more
openaire +3 more sources
Environment International, 2022 Harbour porpoises are under pressure from increasing human activities. This includes the detonation of ammunition that was dumped in large amounts into the sea during and after World War II.
Ursula Siebert +15 more
doaj +1 more source
Exposing the grey seal as a major predator of harbour porpoises [PDF]
Proceedings of the Royal Society B: Biological Sciences, 2015 Harbour porpoises ( Phocoena phocoena ) stranding in large numbers around the southern North Sea with fatal, sharp-edged mutilations have spurred controversy among scientists, the fishing industry and conservationists, whose views about the likely cause differ.
Mardik F. Leopold +5 more
openaire +4 more sources
High field metabolic rates of wild harbour porpoises [PDF]
Journal of Experimental Biology, 2018 ABSTRACTReliable estimates of field metabolic rates (FMRs) in wild animals are essential for quantifying their ecological roles, as well as for evaluating fitness consequences of anthropogenic disturbances. Yet, standard methods for measuring FMR are difficult to use on free-ranging cetaceans whose FMR may deviate substantially from scaling predictions
Laia Rojano-Doñate +7 more
openaire +6 more sources