Results 31 to 40 of about 7,970 (263)
Acoustic behavior of melon-headed whales varies on a diel cycle. [PDF]
, 2015 Many terrestrial and marine species have a diel activity pattern, and their acoustic signaling follows their current behavioral state. Whistles and echolocation clicks on long-term recordings produced by melon-headed whales (Peponocephala electra) at ...
Baumann-Pickering, Simone +4 more
core +2 more sources
Propagation of beluga whale echolocation signals [PDF]
The Journal of the Acoustical Society of America, 1984 The propagation characteristics of high-frequency echolocation signals (peak energies above 100 kHz) of the beluga whale, Delphinapterus leucas were determined by a series of measurements conducted while the animal performed a target-detection task. The whale was trained to station on a “bite-plate” so that its projected beam could be measured in the ...
Whitlow W. L. Au +2 more
openaire +1 more source
Enhancing AIS to Improve Whale-Ship Collision Avoidance and Maritime Security [PDF]
, 2009 Whale-ship strikes are of growing worldwide concern due to the steady growth of commercial shipping. Improving the current situation involves the creation of a communication capability allowing whale position information to be estimated and exchanged ...
Fall, Kevin +2 more
core +2 more sources
Transitions of social-ecological subsistence systems in the Arctic [PDF]
, 2017 Transitions of social-ecological systems (SES) expose governance systems to new challenges. This is particularly so in the Arctic where resource systems are increasingly subjected to global warming, industrial development and globalization which ...
Clark, Douglas A. +3 more
core +4 more sources
Comparative Respiratory Physiology in Cetaceans
Frontiers in Physiology, 2020 In the current study, we used breath-by-breath respirometry to evaluate respiratory physiology under voluntary control in a male beluga calf [Delphinapterus leucas, body mass range (Mb): 151–175 kg], an adult female (estimated Mb = 500–550 kg) and a ...
Andreas Fahlman +8 more
doaj +1 more source
High‐frequency aerial surveys inform the seasonal distribution of Cook Inlet beluga whales
Wildlife Society Bulletin, 2018 Management options to mitigate potential effects from the overlap of anthropogenic and marine mammal activities require understanding of species’ habitat use and movement patterns.
Nathan Wolf +5 more
doaj +1 more source
ADRENAL HYPERPLASTIC AND DEGENERATIVE CHANGES IN BELUGA WHALES [PDF]
Journal of Wildlife Diseases, 1997 Thirty stranded beluga whales (Delphinapterus leucas) from the St. Lawrence Estuary (Quebec, Canada) population and five animals from the Hudson Bay aboriginal hunt (North-west Territories, Canada) were examined. Twenty one animals from the St. Lawrence Estuary had mild to severe adrenal lesions and four whales from the Hudson Bay population were ...
S, Lair +3 more
openaire +2 more sources
Beluga whale (Delphinapterus leucas) vocalizations and call classification from the eastern Beaufort Sea population [PDF]
, 2015 Funding was provided by the Bureau of Ocean Energy Management under InterAgency Agreement M09PG00016. E.C.G. was supported by a National Research Council (National Academy of Sciences) Postdoctoral Fellowship.Beluga whales, Delphinapterus leucas, have a ...
Berchok, Catherine +2 more
core +1 more source
An improved multi-strategy beluga whale optimization for global optimization problems
Mathematical Biosciences and Engineering, 2023 This paper presents an improved beluga whale optimization (IBWO) algorithm, which is mainly used to solve global optimization problems and engineering problems.
Hongmin Chen +6 more
doaj +1 more source
Pêches des bélugas, des anguilles et des esturgeons noirs de l’estuaire du St-Laurent
Revue d'ethnoécologie, 2018 This paper presents an ethnographic examination of beluga whale, eel and black sturgeon fisheries, focusing more particularly on their exploitation, commodification and conservation.
Sabrina Doyon
doaj +1 more source