Results 31 to 40 of about 703 (166)
Ecological Solutions and Evidence, 2021 Harbour porpoises frequently alter their behaviour in response to underwater sound from shipping, seismic surveys, drilling and marine renewables. Less well understood is the response of porpoises to sounds emitted from oil and gas (O&G) platforms during
Karin Tubbert Clausen +5 more
doaj +1 more source
Frontiers in Marine Science, 2023 Incidental catch in fishing gear (often known as bycatch) is a major mortality factor for the Black Sea harbour porpoise (Phocoena phocoena relicta), an endemic subspecies listed as Endangered in the IUCN Red List.
Dimitar Popov +21 more
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 +3 more
openaire +2 more sources
PLoS ONE, 2013 Odontocetes produce a range of different echolocation clicks but four groups in different families have converged on producing the same stereotyped narrow band high frequency (NBHF) click.
Line A Kyhn +6 more
doaj +1 more source
Echolocation by the harbour porpoise: life in coastal waters [PDF]
Frontiers in Physiology, 2013 The harbor porpoise is one of the smallest and most widely spread of all toothed whales. They are found abundantly in coastal waters all around the northern hemisphere. They are among the 11 species known to use high frequency sonar of relative narrow bandwidth.
Miller, Lee A., Wahlberg, Magnus
openaire +4 more sources
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
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 +4 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
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 +8 more
doaj +1 more source
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 +10 more
doaj +1 more source