Results 61 to 70 of about 8,493 (204)
Frontiers in Marine Science, 2022 Humans impact natural systems at an unprecedented rate. The North Sea is one of the regions in the world with the highest levels of anthropogenic activity.
Lonneke L. IJsseldijk +9 more
doaj +1 more source
Will harbour porpoises (Phocoena phocoena) habituate to pingers?
J. Cetacean Res. Manage., 2023 Large bycatches of harbour porpoises (Phocoena phocoena) occur in gillnet fisheries throughout the Northern Hemisphere. Several mitigation measures, including acoustic deterrent devices or ‘pingers’, have been used in efforts to reduce this bycatch. The potential exists for harbour porpoises to habituate to pingers, thus reducing their effectiveness ...
Tara M. Cox +3 more
openaire +1 more source
Integrative Zoology, EarlyView.The audiogram of the world's first successfully captive‐born Yangtze finless porpoise was on average 40 dB higher than conspecifics. Congenital hearing disorders and noise exposure may be the primary cause of porpoise's hearing loss. ABSTRACT Aquariums globally have seen significant growth in recent decades.
Zhitao Wang +3 more
wiley +1 more source
Central nervous system disease and genital disease in harbor porpoises (Phocoena phocoena) are associated with different herpesviruses [PDF]
, 2016 Herpesvirus infection causes disease of variable severity in many species, including cetaceans. However, little is known about herpesvirus infection in harbor porpoises (Phocoena phocoena), despite being widespread in temperate coastal waters of the ...
Bildt, M.W.G. (Marco) van de +7 more
core +1 more source
Integrative Zoology, EarlyView.The transition of cetaceans from a terrestrial to an aquatic environment involved a crucial sensory adaptation to environments with limited visibility. Vibrissae, important mechanoreceptors, undergo an ontogenetic transformation in odontocetes. This research describes the histomorphology of vibrissae and crypts at different developmental stages ...
Cecilia Mariana Krmpotic +10 more
wiley +1 more source
Growth and reproduction in harbour porpoises (Phocoena phocoena) in Icelandic waters
NAMMCO Scientific Publications, 2003 A total of 1,268 harbour porpoises were obtained from fishing nets in Icelandic coastal waters from September to June in the years 1991 to 1997. Foetal sex ratio was 1.2:1 (male:female). The bias towards males increased further among older animals in the
Droplaug Ólafsdóttir +3 more
doaj +1 more source
Abundance of harbor porpoise (Phocoena phocoena) in three Alaskan regions, corrected for observer errors due to perception bias and species misidentification, and corrected for animals submerged from view [PDF]
, 2010 Estimating the abundance of cetaceans from aerial survey data requires careful attention to survey design and analysis. Once an aerial observer perceives a marine mammal or group of marine mammals, he or she has only a few seconds to identify and ...
Hobbs, Roderick C., Waite, Janice M.
core
An Adaptive Threshold in Mammalian Neocortical Evolution
, 2013 Expansion of the neocortex is a hallmark of human evolution. However, it remains an open question what adaptive mechanisms facilitated its expansion.
Huttner, Wieland B +4 more
core +3 more sources
Microhaplotype Methods Enable Relationship Inference in a Bottlenecked Mammalian Species
Animal Conservation, EarlyView.Northern elephant seals (Mirounga angustirostris) are among the most genetically depauperate mammals in the world. A near‐total population bottleneck in the 19th century, coupled with the breeding system of extreme polygyny, has challenged efforts to estimate individual reproductive success with genetic methods.
Keith M. Hernandez +6 more
wiley +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