Results 31 to 40 of about 522 (154)
Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica [PDF]
Journal of Vertebrate Paleontology, 2016 The Eocene La Meseta Formation on Seymour Island, Antarctic Peninsula, is known for its remarkable wealth of fossil remains of chondrichthyans and teleosts. Chondrichthyans seemingly were dominant elements in the Antarctic Paleogene fish fauna, but decreased in abundance from middle to late Eocene, during which time remains of bony fishes increase ...
Kriwet, Jürgen +4 more
openaire +3 more sources
Lista patrón de los tiburones, rayas y quimeras (Chondrichthyes, Elasmobranchii, Holocephali) de México [PDF]
Arxius de Miscel-lània Zoològica, 2016 Checklist of sharks, rays and chimaeras (Chondrichthyes, Elasmobranchii, Holocephali) from Mexico We present an annotated checklist of the species of sharks, rays and chimaeras (chondrichthyan fishes) occurring in Mexican waters, based on a thorough ...
Del Moral-Flores, L. F. +4 more
doaj +3 more sources
Nerve Growth Factor Receptor (NGFR/p75NTR) of the Small-Spotted Catshark (Scyliorhinus canicula): Evolutionary Conservation and Brain Function. [PDF]
J Comp Neurolp75NTR expression in the brain of the basal vertebrate Scyliorhinus canicula revealed its conservation across species. Functional conservation among vertebrates was demonstrated (i) by performing the canonical PC‐12 differentiation assay with the S. canicula NGF and (ii) by complementing the p75NTR absence in a PC‐12 p75NTR−/− knock‐out clone with the ...
Chiavacci E +5 more
europepmc +2 more sources
Shearing Tooth Morphology May Allow Sharks to Access Higher Trophic Levels at Smaller Sizes. [PDF]
Ecol EvolPredator 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 ...
Riverón S +7 more
europepmc +2 more sources
Community assembly processes and drivers shaping marine fish community structure in the North Sea
Ecography, Volume 2023, Issue 10, October 2023., 2023 To preserve natural ecosystems and their biodiversity, there is a need to anticipate future ecosystem changes through better understanding of underlying drivers and assembly processes determining community composition. Assembly processes can be understood as a set of filters acting at different spatio‐temporal scales that jointly define the structure ...
Marcel Montanyès +2 more
wiley +1 more source
Environmental DNA, Volume 5, Issue 4, Page 634-647, July 2023., 2023 We have developed a workflow that evaluates the current status of GenBank for marine fishes. For a given combination of species and barcodes, a gap analysis is performed and potentially erroneous sequences are identified. Besides providing a tool for reference database curation, this study confirms the 14 need to increase 12S rRNA reference sequences ...
Cristina Claver +4 more
wiley +1 more source
Ecology and Evolution, Volume 13, Issue 6, June 2023., 2023 Major knowledge gaps exist regarding Chondrichthyan trait evolution. Lack of integration between key fields of organismal biology is the main driver of this uncertainty. Increase in research effort and application of methodologies used frequently in other clades may be sufficient to overcome this lack of integration. Abstract Sharks, rays, and chimaera
Joel H. Gayford
wiley +1 more source
Head anatomy of a lantern shark wet‐collection specimen (Chondrichthyes: Etmopteridae)
Journal of Anatomy, Volume 242, Issue 5, Page 872-890, May 2023., 2023 In this study, we present a two‐step micro‐computed tomography array to a 39‐year‐old wet‐collection Lantern Shark specimen of Etmopterus lucifer. The focus of our scanning approach is the head anatomy showing numerous internal structures, for example the ampullae of Lorenzini, the olfactory system and major brain areas.
Manuel Andreas Staggl +2 more
wiley +1 more source
Ecology and Evolution, Volume 13, Issue 3, March 2023., 2023 Based on a simplified and attempt, yet rigorous, elicitation framework, we obtained expert's estimations of a species' probability of being caught (fatally), at fishing fleet segment scale. Based on these estimates, we developed a creative method, structured to assess the fishing‐related risks for species of conservation concern.
Umberto Scacco +2 more
wiley +1 more source
Papers in Palaeontology, Volume 8, Issue 6, November/December 2022., 2022 Abstract Middle Miocene (Badenian) chondrichthyan fossils collected from the Tekeres Schlieren Member of the Baden Formation at Tekeres (southern Hungary, Mecsek Mts) are described here. The chondrichthyan assemblage is exceptionally diverse and well‐preserved, and consists of holocephalans, selachians and batomorphs.
Márton Szabó +6 more
wiley +1 more source