Results 41 to 50 of about 17,357 (295)

Protein–Lipid Composition of Plasma Membranes and Structural Organization of the Cytoskeleton in Nucleated Erythrocytes of Cartilaginous and Teleost Fish

open access: yesNatural Built Social Environment Health
This study compares erythrocyte membrane composition in two cartilaginous Black Sea fish (Raja clavata, Dasyatis pastinaca) and three teleosts (Scorpaena porcus, Spicara flexuosa, Trachurus mediterraneus ponticus).
Yuriy A. Silkin   +3 more
doaj   +1 more source

Catch Composition, Seasonality, and Biological Aspects of Sharks Caught in the Ecuadorian Pacific

open access: yesDiversity, 2022
Although sharks have a fundamental role in maintaining the balance of aquatic ecosystems, exerting a great influence on lower levels of the food chain, their populations are declining worldwide due, to a large extent, to overfishing.
Jesús Briones-Mendoza   +2 more
doaj   +1 more source

Anatomical and Histological Study of Shark (Carcharhinus sorrah) Kidney

open access: yesBiology, Medicine & Natural Product Chemistry, 2019
Sharks are sea water fishes belong to the class Chondrichthyes, Subclass Elasmobranchii. Sharks are cartilaginous fish that have a different osmoregulation process than any other sea water fish. Cartilaginous fish is the only vertebrate that can maintain
Hikmah Supriyati   +2 more
doaj   +1 more source

Targeted next-generation sequencing of dedifferentiated chondrosarcoma in the skull base reveals combined TP53 and PTEN mutations with increased proliferation index, an implication for pathogenesis [PDF]

open access: yes, 2016
Dedifferentiated chondrosarcoma (DDCS) is a rare disease with a dismal prognosis. DDCS consists of two morphologically distinct components: the cartilaginous and noncartilaginous components.
Cao, Dengfeng   +13 more
core   +2 more sources

Survey sequencing and comparative analysis of the elephant shark (Callorhinchus milii) genome.

open access: yesPLoS Biology, 2007
Owing to their phylogenetic position, cartilaginous fishes (sharks, rays, skates, and chimaeras) provide a critical reference for our understanding of vertebrate genome evolution.
Byrappa Venkatesh   +11 more
doaj   +1 more source

The interleukin 1 (IL-1) system in the uteroplacental complex of a cartilaginous fish, the smoothhound shark, Mustelus canis

open access: yesReproductive Biology and Endocrinology, 2003
Cartilaginous fish are the oldest extant jawed vertebrates and the oldest line to have placentae. Their pivotal evolutionary position makes them attractive models to investigate the mechanisms involved in the maternal-fetal interaction.
Hamlett William C   +3 more
doaj   +1 more source

Phylotranscriptomics suggests the jawed vertebrate ancestor could generate diverse helper and regulatory T cell subsets

open access: yesBMC Evolutionary Biology, 2018
Background The cartilaginous fishes diverged from other jawed vertebrates ~ 450 million years ago (mya). Despite this key evolutionary position, the only high-quality cartilaginous fish genome available is for the elephant shark (Callorhinchus milii), a ...
Anthony K. Redmond   +2 more
doaj   +1 more source

Foliculogénesis Ovárica en la Raya Marmorada, Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes, Rajidae) [PDF]

open access: yes, 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

Fish remains from Miocene beds of Višnja vas near Vojnik, Slovenia

open access: yesGeologija, 2013
This paper discusses fossil teeth of sharks (Elasmobranchii, Neoselachii) and porgies (Teleostei, Sparidae) fromthe Miocene glauconite sandstones of Vi{nja vas near Vojnik.
Aleš Šoster, Vasja MIkuž
doaj   +1 more source

Assessment of the conservation status of Chondrichthyans: underestimation of the pollution threat

open access: yesThe European Zoological Journal, 2021
Cartilaginous fish include sharks, rays, skates, sawfish, and chimaeras. Their habitat ranges from shallow coastal waters to deep ocean floors, estuarine areas as well as rivers and inland waters.
G. Consales, L. Marsili
doaj   +1 more source

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