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 +7 more
wiley +1 more source
Revista de Arqueologia, 1986 O ''sambaqui de Camboinhas" foi descoberto no interior de uma "duna fóssil", dentro das cotas altimétricas de 7-8m acima do nível do mar, num trecho da Praia de ltaipu, Niterói, RJ.
Fausto Luiz de Souza Cunha +2 more
doaj +1 more source
Development and evolution of dentition pattern and tooth order in the Skates and Rays (Batoidea; Chondrichthyes) [PDF]
, 2015 Shark and ray (elasmobranch) dentitions are well known for their multiple generations of teeth, with isolated teeth being common in the fossil record.
Fraser, G.J. +7 more
core +5 more sources
In Situ Thrust Measurement of Fish During Locomotion; Test Case: Sharks
Ecology and Evolution, Volume 15, Issue 7, July 2025.We present a novel method that uses in situ video data of fish locomotion to calculate thrust. This methodology was applied to several large elasmobranch species, which are typically challenging to measure. Our findings indicate that coastal pelagic species exhibited lower scaled thrust than benthic species, suggesting that benthic species may be less ...
Braedon Payne +3 more
wiley +1 more source
Molecular identification of sharks from the genus Sphyrna (Elasmobranchii: Chondrichthyes) in Maranhão Coast (Brazil) [PDF]
Brazilian Journal of BiologySharks of the genus Sphyrna are under intense exploitation globally. In Brazil’s northern coast, this genus represents a high proportion of fisheries landings and comprises four species.
C. F. L. Sodré +7 more
doaj +1 more source
Foliculogénesis Ovárica en la Raya Marmorada, Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes, Rajidae) [PDF]
, 2011 Los Condrictios se han convertido en un recurso económico importante en las últimas décadas, siendo Argentina uno de los países que más explota tiburones y rayas, incluso a niveles que exceden los límites de varias especies.
Díaz Andrade, María Constanza +3 more
core +1 more source
STRUKTUR ANATOMIS VALVULA INTESTINALIS PARI GITAR (Rhinobatos typus)
Florea: Jurnal Biologi dan Pembelajarannya, 2019 Rhinobatos typus is included in Elasmobranchii Subclasses which has a unique intestine structure on internal part forms folds called valvula intestinalis as extension surface of food absorption.
Kusrini Kusrini, La Aba
doaj +1 more source
Evolutionary trends in the elasmobranch neurocranium
Scientific ReportsThe neurocranium (braincase) is one of the defining vertebrate characters. Housing the brain and other key sensory organs, articulating with the jaws and contributing to the shape of the anteriormost portion of the body, the braincase is undoubtedly of ...
Joel H. Gayford +2 more
doaj +1 more source
Some information on reproduction and embryonic development of the lesser guitarfish Zapteryx brevirostris in Southern Brazil [PDF]
Acta Adriatica, 2007 Individuals of Zapteryx brevirostris were caught from August 2003 to September 2004 using bottom trawl nets in a bay located in Southern Brazil. Total length ranged from 42.8 to 47.3 cm in males and 44.1 to 52.2 cm in females.
Vinícius ABILHOA +2 more
doaj
Fossils from the lower globigerina limestone formation at Wardija, Gozo (Miocene, Aquitanian), with a description of some new pteropod species (Mollusca, Gastropoda) [PDF]
, 2003 Phosphatised fossil assemblages of four samples from the Lower Globigerina Limestone Formation at Wardija (SE Gozo, Malta) were analysed, with special emphasis on holoplanktonic molluscs (Gastropoda: Heteropoda and Pteropoda). The upper sample (sample 4)
Janssen, Arie W.
core