Results 11 to 20 of about 7,713 (156)

Ultrasonographic Ocular Biometry of the Greater Caribbean Manatee (Trichechus manatus manatus). [PDF]

open access: yesVet Ophthalmol
ABSTRACT This study aimed to characterize the ocular biometry of the Trichechus manatus manatus applying B‐mode ultrasonography across different age groups. Twenty‐two animals were assessed employing a portable ultrasound device equipped with a linear transducer. Five ocular parameters were assessed: corneal thickness (CT), anterior chamber depth (ACD),
de Oliveira REM   +10 more
europepmc   +2 more sources

Morphology of the Tympano-Periotic Complex in Stranded Odontocetes in Northeast Brazil. [PDF]

open access: yesJ Morphol
This study presents the morphological and morphometric characterization of the tympano‐periotic complex (TPC) in six odontocete species stranded along the northeastern coast of Brazil. A total of 57 TPCs were analyzed, revealing interspecific differences in key anatomical features and supporting taxonomic differentiation.
Colombini-Corrêa G   +5 more
europepmc   +2 more sources

Modeling population effects of the Deepwater Horizon oil spill on a long-lived species. [PDF]

open access: yesConserv Biol, 2022
Abstract The 2010 Deepwater Horizon (DWH) oil spill exposed common bottlenose dolphins (Tursiops truncatus) in Barataria Bay, Louisiana to heavy oiling that caused increased mortality and chronic disease and impaired reproduction in surviving dolphins. We conducted photographic surveys and veterinary assessments in the decade following the spill.
Schwacke LH   +20 more
europepmc   +2 more sources

Extrapolating cetacean densities to quantitatively assess human impacts on populations in the high seas. [PDF]

open access: yesConserv Biol, 2017
Abstract As human activities expand beyond national jurisdictions to the high seas, there is an increasing need to consider anthropogenic impacts to species inhabiting these waters. The current scarcity of scientific observations of cetaceans in the high seas impedes the assessment of population‐level impacts of these activities. We developed plausible
Mannocci L   +3 more
europepmc   +2 more sources

Vulnerability of marine megafauna to global at-sea anthropogenic threats. [PDF]

open access: yesConserv Biol
Abstract Marine megafauna species are affected by a wide range of anthropogenic threats. To evaluate the risk of such threats, species’ vulnerability to each threat must first be determined. We build on the existing threats classification scheme and ranking system of the International Union for Conservation of Nature (IUCN) Red List of Threatened ...
VanCompernolle M   +310 more
europepmc   +2 more sources

Red‐list status and extinction risk of the world's whales, dolphins, and porpoises

open access: yesConservation Biology, Volume 37, Issue 5, October 2023., 2023
Abstract To understand the scope and scale of the loss of biodiversity, tools are required that can be applied in a standardized manner to all species globally, spanning realms from land to the open ocean. We used data from the International Union for the Conservation of Nature Red List to provide a synthesis of the conservation status and extinction ...
Gill T. Braulik   +9 more
wiley   +1 more source

Tracking marine tetrapod carcasses using a low‐cost mixed methodology with GPS trackers, passive drifters and citizen science

open access: yesMethods in Ecology and Evolution, Volume 14, Issue 9, Page 2354-2361, September 2023., 2023
Abstract Drift experiments are essential to understand stranding patterns and estimate the mortality of beached animals. Most studies do not use telemetry technology due to the high costs of this methodology. The objective of this paper is to describe the possibilities of tracking marine tetrapod carcasses with a low‐cost and replicable methodology ...
Maurício Tavares   +2 more
wiley   +1 more source

Contrasting ecological information content in whaling archives with modern cetacean surveys for conservation planning and identification of historical distribution changes

open access: yesConservation Biology, Volume 37, Issue 3, June 2023., 2023
Abstract Many species are restricted to a marginal or suboptimal fraction of their historical range due to anthropogenic impacts, making it hard to interpret their ecological preferences from modern‐day data alone. However, inferring past ecological states is limited by the availability of robust data and biases in historical archives, posing a ...
Tom B. Letessier   +8 more
wiley   +1 more source

The ecology and evolution of human‐wildlife cooperation

open access: yesPeople and Nature, Volume 4, Issue 4, Page 841-855, August 2022., 2022
Abstract Human‐wildlife cooperation is a type of mutualism in which a human and a wild, free‐living animal actively coordinate their behaviour to achieve a common beneficial outcome. While other cooperative human‐animal interactions involving captive coercion or artificial selection (including domestication) have received extensive attention, we lack ...
Dominic L. Cram   +41 more
wiley   +1 more source

Overall dynamic body acceleration measures activity differently on large versus small aquatic animals

open access: yesMethods in Ecology and Evolution, Volume 13, Issue 2, Page 447-458, February 2022., 2022
Abstract Acceleration‐based proxies for activity and energy expenditure are widely used in bio‐logging studies of animal movement and locomotion to explore biomechanical strategies, energetic costs of behaviour, habitat use and the impact of anthropogenic disturbance.
Lucía Martina Martín López   +3 more
wiley   +1 more source

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