Results 41 to 50 of about 1,175 (199)

Elephants and Sirenians: A Comparative Review across Related Taxa in Regard to Learned Vocal Behavior

Comparative Cognition & Behavior Reviews, 2022
Vocal production learning is the ability to modify a vocal output in response to auditory experience. It is essential for human speech production and language acquisition. Vocal learning evolved independently several times in vertebrates, indicating evolutionary pressure in favor of this trait. This enables cross-species comparative analysis to be used
Baotic, Anton, Brady, Beth, Ramos, Eric Angel, Stoeger, Angela S.   +3 more
openaire   +3 more sources

Blubber Thickening Driven by UCP1 Inactivation: Insights from a Cetacean‐Like Transgenic Mouse Model

Integrative Zoology, EarlyView.
UCP1 inactivation of cetaceans in mice drives BAT whitening and iWAT hyperplasia, promoting fat accumulation for aquatic adaptation. Abstract Cetaceans possess thick blubber, a specialized adipose tissue essential for thermal insulation, a streamlined body form, energy storage, and buoyancy. However, the mechanisms that underpin this adaptation are not
Qian Zhang, Yuehua Wang, Hang Zhang, Guiping Xu, Shixia Xu, Guang Yang   +5 more
wiley   +1 more source

Genetic variation at hair length candidate genes in elephants and the extinct woolly mammoth [PDF]

, 2009
Background Like humans, the living elephants are unusual among mammals in being sparsely covered with hair. Relative to extant elephants, the extinct woolly mammoth, Mammuthus primigenius, had a dense hair cover and extremely long hair, which likely were
Alex D Greenwood, Alfred L Roca, Gennady Boeskorov, Kristin Stewardson, Michele Tisdale, Nikolas Nikolaidis, Sergios-Orestis Kolokotronis, Shannon Hensley, Stephen Fratpietro, Yasuko Ishida   +9 more
core   +3 more sources

Gas exchange and pulmonary stress variations during SCUBA and breath‐hold diving in open seawater

The Journal of Physiology, EarlyView.
Abstract figure legend Healthy, trained divers were studied before, during and after diving in open seawater with different techniques. SCUBA divers (diving to 15 or 40 m with air; cycling at depth) and breath‐hold divers (BHDs; sled‐assisted dives to 15, 25 or 40 m) underwent underwater and surface arterial blood gas (ABG) sampling.
Matteo Paganini, Tommaso Antonio Giacon, Simona Mrakic‐Sposta, Luca Martani, Danilo Cialoni, Lorenzo Zucchi, Vincenzo Maffei, Rosario Cifali, Mariano Marmo, Enrico M Camporesi, Richard E Moon, Gerardo Bosco   +11 more
wiley   +1 more source

Progesterone monitoring and gestation length in Amazonian manatees (Trichechus inunguis)

Theriogenology Wild
Knowledge of pregnancy length and the physiological parameters during pregnancy is an important tool for pregnancy diagnosis in free-ranging and captive individuals and for the correct husbandry of captive pregnant females. Therefore, this study aimed to
Rodrigo S. Amaral, Vera M.F. da Silva, José Anselmo d’Affonsêca Neto   +2 more
doaj   +1 more source

American manatees adjust their diet composition and trophic niche breadth across different coastal regions

Limnology and Oceanography Letters, Volume 11, Issue 3, May 2026.
Abstract Marine mammals can exhibit high plasticity in foraging strategies, but how such plasticity is driven by environmental conditions is poorly understood. The American manatee (Trichechus manatus), a large, endangered herbivore, inhabits marine, estuarine, and freshwater environments.
Camila Carvalho de Carvalho, Emma Deeks, Leandro L. Ciotti, Silvina Botta, Miriam Marmontel, Margareth Copertino, Fábia de Oliveira Luna, Fernanda Niemeyer Löffer Attademo, Vitor Luz Carvalho, João Carlos Gomes Borges, Alexandra Fernandes Costa, Renata Emin‐Lima, Pavel Kratina, Eduardo Resende Secchi   +13 more
wiley   +1 more source

Cognition as a Conservation Tool: A Case Study of Florida Manatees and Boat Strikes

Marine Mammal Science, Volume 42, Issue 2, April 2026.
ABSTRACT Boat strikes injure and kill large numbers of Florida manatees (Trichechus manatus latirostris) each year. Management actions taken to mitigate this threat can be potentially enhanced by consideration of manatee cognitive processes. The role of cognition in marine mammal conservation has received little consideration in the literature.
Gordon B. Bauer, Charles J. Deutsch, Roger L. Reep, Wendi Fellner, Tabitha Gunnars, Peter F. Cook, Heidi E. Harley, Athena M. Rycyk   +7 more
wiley   +1 more source

ON A SKULL OF A SIRENIAN FROM THE EARLY PLIOCENE OF SIENA, TUSCANY

Rivista Italiana di Paleontologia e Stratigrafia, 2020
A fine skull of a sirenian from Early Pliocene littoral sands with Late Ruscinian terrestrial mammals near Siena is referred to Metaxitherium gervaisi (Capellini, 1872); it provides detailed information on the characters of this species, which was ...
DANIELA CANOCCHI
doaj  

Distilling food web dynamics: top–down and bottom–up drivers of extinction and trophic cascades

Oikos, Volume 2026, Issue 3, March 2026.
Quantifying population dynamics is a fundamental challenge in ecology and evolutionary biology, particularly for species that are cryptic, microscopic, or extinct. Traditional approaches rely on continuous representations of population size, but in many cases, the precise number of individuals is unknowable.
Justin D. Yeakel
wiley   +1 more source

Status of Marine Mammal Research and Conservation in lndia [PDF]

, 2011
In India, earl~ere search on marine mammals was restricted mostly to opportunistic collection of information on strandings and beach-cast specimens. Organised research by government and non-government organisations on these charismatic and vulnerable ...
Rajagopalan, M, Vivekanandan, E
core