Results 21 to 30 of about 737 (167)

Historical Range Contraction and Extent of Harbour Porpoises (Phocoena phocoena) in the Baltic Sea Revealed by Archival Newspapers [PDF]

Ecology and Evolution
Over the past several centuries, the Baltic Proper harbour porpoise (Phocoena phocoena) has undergone significant population declines, resulting in its current IUCN classification as critically endangered.
M. Aiken, P. Erikson, C. Kinze, J. Carlström   +3 more
doaj   +2 more sources

Performance of theodolites versus drones in land-based studies of marine mammals [PDF]

Scientific Reports
Theodolites and drones are key instruments for observing small whales in coastal areas. This study compared their performance while observing the harbour porpoise (Phocoena phocoena) in the western Baltic Sea.
Thaya Mirinda Dinkel, Angélique Girard, Tom Bär, Michael Dähne, Ann-Kristin Craul, Mel Cosentino, Ole Meyer-Klaeden, Flemming Dahlke, Christian von Dorrien   +8 more
doaj   +2 more sources

A matter of scale: Identifying the best spatial and temporal scale of environmental variables to model the distribution of a small cetacean [PDF]

Ecology and Evolution
The importance of scale when investigating ecological patterns and processes is recognised across many species. In marine ecosystems, the processes that drive species distribution have a hierarchical structure over multiple nested spatial and temporal ...
Tiffany Goh, Mark Jessopp, Emer Rogan, Enrico Pirotta   +3 more
doaj   +2 more sources

High heart rates in hunting harbour porpoises [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2021
The impressive breath-hold capabilities of marine mammals are facilitated by both enhanced O 2 stores and reductions in the rate of O 2 consumption via peripheral vasoconstriction and bradycardia, called the dive response.
Birgitte I. McDonald, Siri L. Elmegaard, Mark Johnson, Danuta M. Wisniewska, Laia Rojano-Doñate, Anders Galatius, Ursula Siebert, Jonas Teilmann, Peter T. Madsen   +8 more
openaire   +2 more sources

Harbour porpoises respond to climate change [PDF]

Ecology and Evolution, 2011
AbstractThe effects of climate change on marine ecosystems and in particular on marine top predators are difficult to assess due to, among other things, spatial variability, and lack of clear delineation of marine habitats. The banks of West Greenland are located in a climate sensitive area and are likely to elicit pronounced responses to oceanographic
Heide-Jørgensen, Mads Peter, Iversen, Maria, Nielsen, Nynne Hjort, Lockyer, Christina, Stern, Harry, Ribergaard, Mads Hvid   +5 more
openaire   +2 more sources

Spontaneous neoplasms in harbour porpoises Phocoena phocoena

Diseases of Aquatic Organisms, 2022
Harbour porpoises are widely distributed in the North Atlantic and represent the most abundant cetacean species in the North and Baltic Seas. Spontaneous neoplasms are relatively rarely reported in cetaceans, and only little is known about neoplasia in harbour porpoises.
Gregor, K M, Lakemeyer, J, IJsseldijk, L L, Siebert, U, Wohlsein, P   +4 more
openaire   +3 more sources

Interfollicular Fibrosis in the Thyroid of the Harbour Porpoise: An Endocrine Disruption? [PDF]

Archives of Environmental Contamination and Toxicology, 2006
Previous studies have described high levels of polychlorobiphenyls (PCB), polybrominated diphenylether (PBDE), toxaphene, p,p'-dichlorodiphenyltrichloroethane (DDT), and p,p'-dichlorodiphenyldichloroethylene (DDE) in the blubber of the harbour porpoise from the North Sea raising the question of a potential endocrine disruption in this species.
Das, Krishna, Vossen, Arndt, Tolley, Kristal, Vikingsson, Gisli, Thron, Kristina, Müller, Gundi, Baumgärtner, Wolfgang, Siebert, Ursula   +7 more
openaire   +2 more sources

Harbour porpoise (Phocoena phocoena) in the North Atlantic: Abundance, removals, and sustainability of removals

NAMMCO Scientific Publications, 2003
The status of harbour porpoise (Phocoena phocoena) populations in the North Atlantic has raised numerous concerns. Although a number of factors that may be adversely affecting harbour porpoise populations have been identified, focus has been on the ...
G B Stenson
doaj   +1 more source

Source of Aegean Sea harbour porpoises [PDF]

Marine Ecology Progress Series, 2003
Documented sightings of harbour porpoises in the Mediterranean are rare, although the species is common in the neighbouring North Atlantic and Black Sea. However, in the past 2 decades, 4 harbour porpoises Phocoena phocoena have been recorded in the northern Aegean Sea in the east- ern Mediterranean Basin. Samples were taken from 2 of these.
Lockyer, Christina, Rosel, P. E., Frantzis, A., Komnenou, A.   +3 more
openaire   +2 more sources

Ecosystem-based fisheries management increases catch and carbon sequestration through recovery of exploited stocks: The western Baltic Sea case study

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, Marco Scotti, Silvia Opitz, Liam MacNeil, Axel Kreutle, Christian Pusch, Rainer Froese   +6 more
doaj   +1 more source