Results 71 to 80 of about 12,004 (204)

Shearing Tooth Morphology May Allow Sharks to Access Higher Trophic Levels at Smaller Sizes

Ecology and Evolution, Volume 15, Issue 8, August 2025.
Predator morphology imposes limitations on prey selection due to biomechanical constraints, making some prey functionally inaccessible and thereby constraining predator trophic niches. We assessed how two key components of trophic morphology—tooth shape and body size—affect prey selectivity and trophic niche in two sympatric sharks with contrasting ...
Sabrina Riverón, Vincent Raoult, David J. Slip, Federico Mas, Martín Laporta, Inés Pereyra, Santiago Silveira, Robert G. Harcourt   +7 more
wiley   +1 more source

Biogeography and History of the Prehuman Native Mammal Fauna of the New Zealand Region

Diversity
The widespread perception of New Zealand is of a group of remote islands dominated by reptiles and birds, with no native mammals except a few bats. In fact, the islands themselves are only part of a wider New Zealand Region which includes a large section
Carolyn M. King
doaj   +1 more source

Biological parameters of franciscana dolphins, Pontoporia blainvillei, bycaught in artisanal fisheries off southern Buenos Aires, Argentina [PDF]

, 2014
The franciscana dolphin (Pontoporia blainvillei) is a small coastal dolphin endemic to the south-western Atlantic ocean. Incidental captures in fishing gillnets is possibly the greatest conservation concern for this species, and occurs within most of ...
Cappozzo, Humberto Luis, Denuncio, Pablo Ezequiel, Negri, Maria Fernanda, Panebianco, María Victoria, Paso Viola, María Natalia, Rodriguez, Diego   +5 more
core   +2 more sources

Complete Mitochondrial Genomes Provide Evidence of a Killer Whale Refugium Off the Coast of Japan During the Last Glacial Maximum

Journal of Biogeography, Volume 52, Issue 8, August 2025.
ABSTRACT Aim During glacial periods, highly mobile species often shifted to warmer, ice‐free regions known as refugia, which frequently maintained higher genetic diversity than newly colonised areas after glacial retreat. We analyse complete mitogenome sequences from 11 killer whale samples in Nemuro Strait to test the hypothesis that waters around ...
Olga A. Filatova, Ivan D. Fedutin, Ekaterina A. Borisova, Ilya G. Meschersky, Marina V. Shitova, Erich Hoyt, Andrew D. Foote   +6 more
wiley   +1 more source

Are “non-human sounds/music” lesser than human music? A comparison from a biological and musicological perspective

Sign Systems Studies, 2009
The complexity and variation of sound emission by members of the animal kingdom, primarily produced by the orders Passeriformes (songbirds), Cetacea (whales), but also reported in species belonging to the Exopterygota (insects) and Carnivora (mammals ...
Regina Rottner
doaj   +1 more source

Craniogenetic studies in Sus scrofa: With emphasis on the ‘orbitosphenoid’ problem

The Anatomical Record, Volume 308, Issue 7, Page 1931-1943, July 2025.
Abstract The orbitosphenoid is a skeletal element of the endocranium of extant mammals. However, it has also been described in many of their fossil ancestors. Craniogenetic studies show that it is composed of two types of bone: first, the cartilaginous ala orbitalis and parts of the trabecular plate are transformed by endochondral ossification; second,
Wolfgang Maier, Ulla Lächele, Irina Ruf
wiley   +1 more source

Palaeoproteomic identification of a whale bone tool from Bronze Age Heiloo, the Netherlands

Peer Community Journal
Identification of the taxonomic origin of bone tools is an important, but often complicated, component of studying past societies. The species used for bone tool production provide insight into what species were exploited, potentially how, and for what ...
Dekker, Joannes A. A., Mylopotamitaki, Dorothea, Verbaas, Annemieke, Sinet-Mathiot, Virginie, Presslee, Samantha, McCarthy, Morgan L., Olsen, Morten Tange, Olsen, Jesper V., van den Hurk, Youri, Brattinga, Joris, Welker, Frido   +10 more
doaj   +1 more source

Fusión de suturas craneales en el delfín franciscana, Pontoporia blainvillei (Gervais and D'Orbigny, 1844) [PDF]

, 2015
Se estudió la fusión de suturas craneales y su asimetría bilateral en el delfín franciscana, Pontoporia blainvillei. Nuestros resultados mostraron que el cierre de suturas presenta baja variabilidad asociada a la longitud corporal total, exceptuando la ...
Cappozzo, Humberto Luis, del Castillo, Daniela Laura, Flores, David Alfredo   +2 more
core  

Gloger's Rule or Historical Conjecture? Tests in Mammals

Ecology and Evolution, Volume 15, Issue 7, July 2025.
Ecogeographical rules for animal coloration include Gloger's rule, which states that homeotherms are darker at lower latitudes; however, 19th‐century naturalists observed that animals are more colourful in the tropics. We investigated these ideas across the head, torso, legs and tail regions of 2726 species of terrestrial mammals using phylogenetic ...
Natasha Howell, Tim Caro
wiley   +1 more source

Crossing the equator: a northern occurrence of the pygmy right whale

Zoological Letters, 2018
Here we document the first stranding record of the pygmy right whale in the Northern Hemisphere—on the coast of The Gambia, Africa (NE Atlantic Ocean, around latitude 13° N)—a location in stark contrast to its current distribution exclusively south of ...
Cheng-Hsiu Tsai, James G. Mead
doaj   +1 more source