Results 31 to 40 of about 15,793 (217)
Sperm whale acoustic abundance and dive behaviour in the western North Atlantic
Scientific Reports, 2022 Sperm whales are an ideal species to study using passive acoustic technology because they spend the majority of their time underwater and produce echolocation clicks almost continuously while foraging.
Annabel Westell +5 more
doaj +1 more source
Sperm competition in grey whales
Nature, 1988 SIR-Your legend for the drawing of grey whales taken from Cyall Watson's book Whales of the World, perpetuates the myth that a 'helper' male is necessary for successful mating in this species. The legend states that: "Only one male is involved in the actual mating; the other takes an upright position on the far side of the female, acting as a prop or ...
Ralls, Katherine +1 more
openaire +3 more sources
Frontiers in Physiology, 2012 Anthropogenic underwater sound in the environment might potentially affect the behavior of marine mammals enough to have an impact on their reproduction and survival.
Lise Doksæter Sivle +7 more
doaj +1 more source
Heard off Heard: Acoustic detections of sperm whales (Physeter macrocephalus) and other cetaceans off Heard Island [PDF]
JASA Express LettersAn underwater acoustic recorder was moored off Heard Island from September 2017 through March 2018 to listen for marine mammals. Analysis of data was initially conducted by visual inspection of long-term spectral averages to reveal sounds from sperm ...
Brian S. Miller +6 more
doaj +1 more source
Dose response severity functions for acoustic disturbance in cetaceans using recurrent event survival analysis [PDF]
, 2015 This work was financially supported by the U. S. Office of Naval Research grant N00014‐12‐1‐0204, under the project “Multi‐study Ocean acoustics Human effects Analysis” (MOCHA). . L.
De Ruiter, Stacy Lynn +7 more
core +1 more source
Endangered Species Research, 2020 Knowledge of cetacean occurrence and behaviour in southern African waters is limited, and passive acoustic monitoring has the potential to address this gap efficiently. Seasonal acoustic occurrence and diel-vocalizing patterns of sperm whales in relation
Shabangu, FW, Andrew, RK
doaj +1 more source
Life History Parameters to Inform Pattern of Prenatal Investment in Marine Mammals
Journal of Marine Science and Engineering, 2023 Marine mammals are a diverse group of aquatic animals that exhibit wide variation in body size, living conditions, breeding habitat, social behaviour and phylogeny.
Xiaoyu Huang +4 more
doaj +1 more source
Intraspecific variation of cochlear morphology in bowhead and beluga whales
The Anatomical Record, EarlyView.Abstract The bony labyrinth of the petrosal bone, a distinctive feature of mammal skulls, is often identified in micro‐computed tomography imaging to infer species' physiological and ecological traits. When done as part of a comparative study, one individual specimen is normally considered representative of a species, and intraspecific variation is ...
John Peacock, J. G. M. Thewissen
wiley +1 more source
The Anatomical Record, EarlyView.Abstract The anatomical description of the hourglass dolphin (Cephalorhynchus cruciger) and the spectacled porpoise (Phocoena dioptrica) remains largely unexplored, due to limited specimen availability and preservation challenges. This study employed digital imaging techniques, conventional histology, and computed tomography to provide visualization of
Jean‐Marie Graïc +26 more
wiley +1 more source
Convergent evolution in toothed whale cochleae
BMC Evolutionary Biology, 2019 Background Odontocetes (toothed whales) are the most species-rich marine mammal lineage. The catalyst for their evolutionary success is echolocation - a form of biological sonar that uses high-frequency sound, produced in the forehead and ultimately ...
Travis Park +4 more
doaj +1 more source