Results 31 to 40 of about 14,688 (227)
Conservation Science and Practice, 2022 Endangered Cook Inlet beluga whales' (CIBWs; Delphinapterus leucas) abundance has declined nearly 80% since the 1970s, and continues to decline 2.3% annually with less than 300 whales remaining. Despite the Marine Mammal Protection Act and the Endangered
Mandy Migura, Celeste Bollini
doaj +1 more source
Известия ТИНРО, 2014 New eco-ethological data on the Anadyr stock of beluga whales are presented based on 14-year (2000-2013) studies by methods of satellite tracking telemetry, multi-spectral aerial surveys and genetic analysis, as well as traditional and ecosystem-based ...
Denis I. Litovka, Ludmila N. Khitzova
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Hormone profiles from Cook Inlet, Bristol Bay and aquarium beluga whales
Polar Research, 2022 Beluga whales (Delphinapterus leucas) from Cook Inlet (CI), Alaska, are listed as “endangered” because of dramatic declines in abundance, with no indications of population recovery. Serum samples from this population are exceedingly rare.
Shannon Atkinson +4 more
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Cementum structure in Beluga whale teeth [PDF]
Acta Biomaterialia, 2017 A large fraction of the volume of Beluga whale (Delphinapterus leucas) teeth consists of cementum, a mineralized tissue which grows throughout the life of the animal and to which the periodontal ligaments attach. Annular growth bands or growth layer groups (GLGs) form within Beluga cementum, and this study investigates GLG structure using X-ray ...
S R, Stock +5 more
openaire +2 more sources
A Case Study on Logical Relations using Contextual Types
, 2015 Proofs by logical relations play a key role to establish rich properties such as normalization or contextual equivalence. They are also challenging to mechanize.
Cave, Andrew, Pientka, Brigitte
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Arctic ScienceEach community across Inuit Nunaat has specific histories, geography, and cultural norms or practices when it comes to beluga (Delphinapterus leucas) harvesting.
E. Sudlovenick, V. Pokiak, L. Loseto
doaj +1 more source
Recent advances in sturgeon nutrition. [PDF]
, 2017 Sturgeons are fish species of biological and economical importance, and most of them are endangered, vulnerable or rare because of their large size, late sexual maturity, long period between spawning, and longevity.
Hung, Silas SO
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Beluga, Delphinapterus leucas, Distribution and Survey Effort in the Gulf of Alaska [PDF]
, 2000 Beluga, Delphinapterus leucas, distribution in the Gulf of Alaska and adjacent inside waters was examined through a review of surveys conducted as far back as 1936.
Laidre, Kristin L. +3 more
core
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
Early stages of tooth development in the harbor porpoise Phocoena phocoena
The Anatomical Record, EarlyView.Abstract Here we describe the stages of tooth development in toothed whales on the basis of the harbor porpoise (Phocoena phocoena). The aim of the study was to find out whether these stages are identical to those of other mammals analyzed so far although toothed whales are homodont and monophyodont.
Lasse M. Mathes +2 more
wiley +1 more source