Results 81 to 90 of about 5,320 (221)

Growth, age and size of the Jurassic pachycormid Leedsichthys problematicus (Osteichthyes: Actinopterygii) [PDF]

, 2013
The Jurassic pachycormid osteichthyan Leedsichthys problematicus is renowned for having been able to achieve prodigious size for a bony fish. Building on work of MARTILL (1986a), a thorough examination of all known material was conducted in order to ...
Adams, C., Challands, T., Liston, J., Newbrey, M.   +3 more
core  

Checklist of Chondrichthyans in Indian waters [PDF]

Journal of the Marine Biological Association of India, 2014
Abstract Conservation, management and sustainable utilisation of biological resources depend on the accurate identification of exploited taxa, which emphasises the need for systematic taxonomic research. Chondrichthyans (sharks, rays, skates and chimaeras) are considered to be one of the most vulnerable exploited marine resources, however, the basic ...
Akhilesh K. V,, Bineesh K. K., Gopalakrishnan A., Jena J. K   +3 more
openaire   +1 more source

Sawfishes in Brazil: A Historical Review

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 4, April 2026.
ABSTRACT Sawfishes of the genus Pristis are critically endangered rays with key ecological roles in aquatic ecosystems; however, they remain underrepresented in Brazilian scientific literature. This review presents a historical and bibliometric overview of sawfish literature in Brazil, highlighting temporal trends, geographic focus and thematic ...
Reysane de Alencar Sousa Silva, Vicente Vieira Faria, Patrícia Charvet   +2 more
wiley   +1 more source

Molecular Identification and Functional Characterization of LC-PUFA Biosynthesis Elongase (elovl2) Gene in Chinese Sturgeon (Acipenser sinensis)

Animals
Elongases of very-long-chain fatty acids (Elovls) are critical rate-limiting enzymes that are involved in LC-PUFA biosynthesis through catalyzing the two-carbon elongation of a pre-existing fatty acyl chain. Thus far, several Elovls have been extensively
Haoze Ding, Xuetao Shi, Zhengyong Wen, Xin Zhu, Pei Chen, Yacheng Hu, Kan Xiao, Jing Yang, Tian Tian, Dezhi Zhang, Shuqi Wang, Yang Li   +11 more
doaj   +1 more source

The Synarcual of the Little Skate, Leucoraja erinacea: Novel Development Among the Vertebrates

Frontiers in Ecology and Evolution, 2019
Evolutionary variation in anteroposterior patterning of the axial skeleton is a major contributor to the evolution of the vertebrate body plan, with five canonical vertebral types in tetrapods (cervical, thoracic, lumbar, sacral, caudal).
Zerina Johanson, Kyle Martin, Gareth Fraser, Katherine James   +3 more
doaj   +1 more source

Possible multiple evolution of indirect telencephalo-cerebellar pathways in teleosts: studies in Carassius auratus and Pantodon buchholzi [PDF]

, 1993
Among vertebrates, telencephalo-pontine systems exist only in birds and mammals. However, three nuclei in the diencephalon and mesencephalon of teleost fishes have been indicated — analogous to the pons — to represent relay stations between telencephalon
Meyer, Dietrich L., Wullimann, Mario F.
core   +1 more source

Bioimaging of sense organs and the central nervous system in extant fishes and reptiles in situ: A review

The Anatomical Record, Volume 309, Issue 4, Page 826-852, April 2026.
Bioimaging of the sense organs and brain of fishes and reptiles. Left panel: 3D reconstruction of the head and brain of the deep‐sea viperfish Chauliodus sloani following diceCT. Right panel: A 3D reconstruction of a 70‐day‐old embryo head of the bearded dragon Pogona vitticeps following diceCT, showing the position of the segmented brain within the ...
Shaun P. Collin, Kara E. Yopak, Jenna M. Crowe‐Riddell, Victoria Camilieri‐Asch, Caroline C. Kerr, Hope Robins, Myoung Hoon Ha, Annalise Ceddia, Travis L. Dutka, Lucille Chapuis   +9 more
wiley   +1 more source

Integrated Taxonomy and Species Diversity of the Historical Chondrichthyan Collection of the Zoology Museum “Pietro Doderlein” at the University of Palermo (Italy)

Biology
In the context of the progressive tendency to perceive a degraded environmental state as normal, due to the loss of memory of past ecological conditions (i.e., the Shifting Baseline Syndrome), natural history museum collections represent invaluable ...
Maria Vittoria Iacovelli, Enrico Bellia, Martina Caruso, Ettore Zaffuto, Valentina Crobe, Federico Marrone, Stefano Mazzotti, Fausto Tinti   +7 more
doaj   +1 more source

Interactions of Mucus Monosaccharides and the Epidermal Microbiome in Four Benthic Elasmobranchs

Environmental Microbiology Reports, Volume 18, Issue 2, April 2026.
Here we collected mucus and microbes from the skin of Elasmobranchs to identify interactions between mucus and the microbial community. We identified key microbial genes involved in the metabolism of mucus carbohydrates in Elasmobranchs. ABSTRACT Epidermal mucus is a complicated mixture of macromolecules which acts as the first line of defence for ...
Emma N. Kerr, Long Yu, Ryan D. Hesse, Chloe N. Roberts, Vincent Bulone, Lauren Meyer, Robert A. Edwards, Michael P. Doane, Elizabeth A. Dinsdale   +8 more
wiley   +1 more source

Genome‐Wide DNA Methylation Patterns Predict Age in the Zebra Shark (Stegostoma tigrinum) and Provide Insight Into the Evolution of Vertebrate Aging

Molecular Ecology, Volume 35, Issue 7, April 2026.
ABSTRACT Epigenomic changes are a hallmark of aging, and DNA methylation (DNAm) has emerged as the most reliable molecular marker of an individual's age. Genome‐wide patterns of age‐associated hypo‐ and hypermethylation have been applied to generate predictive models (i.e., “epigenetic clocks”) capable of estimating chronological age in an increasingly
Samantha L. Bock, Kady Lyons, Lei Yang, Jennifer Wyffels, Lance Adams, Nienke Klerks, Aaron Jeskie, Ellen Leever, Taylor Hartl, Javier Almunia, Dan Peterson, Ana Ferreira, Joe Okamoto, Kate Archibald, Chris Spaulding, Kayla Leyden, Gisele A. Montano, Savannah Vasey, Adrienne Rowland, Lise Watson, Alfonso Lopez, Jay Hemdal, Mike Stafford, Anne Bronikowski, Gavin J. P. Naylor, Benjamin B. Parrott   +25 more
wiley   +1 more source