Results 61 to 70 of about 556 (178)

Sirenian Sounds

open access: yes
Abstract Extant sirenians are the only aquatic herbivorous mammals and comprise four recognized species: the dugong, the Amazonian manatee, the West Indian manatee, and the African manatee. They inhabit coastal shallow waters in tropical and subtropical areas.
Renata S. Sousa-Lima   +7 more
openaire   +1 more source

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

open access: yesOikos, 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

Ground penetrating radar and palaeontology: The detection of Sirenian fossil bones under a sunflower field in Tuscany (Italy)

open access: yes, 2012
The application of Ground Penetrating Radar (GPR) in vertebrate palaeontology is very rare. We describe the discovery of an Early Pliocene Sirenian skeleton detected by GPR in a locality near Grosseto (Tuscany, Italy). The specimen represents one of the
BINI, MONICA   +4 more
core   +1 more source

Validation of aerial photogrammetry methods to measure body size, condition and mass in small cetaceans

open access: yesThe Journal of Physiology, Volume 604, Issue 5, Page 1788-1808, 1 March 2026.
Abstract figure legend Unoccupied aerial vehicle (UAV)‐based photogrammetry provides measurements equivalent to traditional hand measurements in bottlenose dolphins. Mass estimates derived from UAV measurements closely match the true body mass of live individuals.
Riccardo Cicciarella   +7 more
wiley   +1 more source

An unexpected deadly meeting: Deep- water (hexanchid) shark bite marks on a sirenian skeleton from Pliocene shoreface deposits of Tuscany (Italy)

open access: yes, 2021
Shark bite marks incising fragmentary ribs from a single specimen of the extinct sirenian Metaxytherium subapenninum are described from lower Pliocene shallow- water, marginal- marine (shoreface) deposits exposed at Arcille (Tuscany, Italy).
Merella M.   +4 more
core   +1 more source

Vulnerability of marine megafauna to global at‐sea anthropogenic threats

open access: yesConservation Biology, Volume 40, Issue 1, February 2026.
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 ...
Michelle VanCompernolle   +309 more
wiley   +1 more source

Fossil axial skeletal walrus material from the North Sea and the estuary of the Schelde, and a fossil Sirenian rib (Mammalia, Carnivora; Sirenia) [PDF]

open access: yes, 1999
Ten fossil odobenid remains, and a fossil sirenian rib, encountered by us in a public and in a private collection since the publication of some earlier papers, are described and discussed. All fossils belong, anatomically, to the axial skeleton.
Bree, P.J.H. van   +4 more
core  

Marine mammal bycatch in gillnet and other entangling net fisheries, 1990 to 2011

open access: yesEndangered Species Research, 2013
Since the 1970s the role of fishery bycatch as a factor reducing, or limiting the recovery of, marine mammal populations has been increasingly recognized.
RR Reeves, K McClellan, TB Werner
doaj   +1 more source

Drivers of Habitat Selection by the Endangered Greater Caribbean Manatee in Coastal‐Marine Ecosystems

open access: yesAquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 1, January 2026.
ABSTRACT Habitat selection is a fundamental aspect of animal movement and behaviour, involving strategies that influence population regulation, species interactions, community structure and the generation and preservation of biodiversity. The Greater Caribbean Manatee is a megaherbivorous aquatic mammal with high environmental plasticity, found in a ...
Iran C. Normande   +8 more
wiley   +1 more source

Using Interviews In Sirenian Research

open access: yes, 2015
[No abstract available ...
Ortega-Argueta A.   +2 more
core  

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