Results 171 to 180 of about 8,071 (223)

A new †Pachycormiformes (Actinopterygii) from the Upper Jurassic of Gondwana sheds light on the evolutionary history of the group

Journal of Systematic Palaeontology, 2021
As part of the transition from Holostei to Teleostei, †Pachycormiformes represent a key group of fishes. However, the anatomy and phylogenetic relationships of the group in the context of the neopterygians are far from being understood.
S. Gouiric-Cavalli, G. Arratia
semanticscholar   +1 more source

A standardized terminology of spines in the order Siluriformes (Actinopterygii: Ostariophysi)

, 2021
A standardized terminology for the anatomy of pectoral- and dorsal-fin spines in the order Siluriformes is proposed based on an extensive literature review and direct examination of representatives of the order.
G. Ballen, M. D. De Pinna
semanticscholar   +1 more source

Evolutionary analysis of ghrelin in Actinopterygii

Comparative Biochemistry and Physiology Part D: Genomics and Proteomics
Ghrelin functions to stimulate appetite, promote the release of growth hormone, and regulate energy balance. Currently, research on the ghrelin is primarily focused on a single species, and there have been no systematic studies on the evolution of the ghrelin in fish.
Jiahao Luo, Zhongduo Wang
exaly   +3 more sources

Type I interferons in ray-finned fish (Actinopterygii).

Fish and Shellfish Immunology, 2020
Interferons (IFNs) are proteins of vital importance in the body's immune response. They are formed in different types of cells and have been found in fish, amphibians, reptiles and mammals. Two types of IFN have been found in ray-finned fish (Superclass:
M. Stosik, B. Tokarz-Deptuła, W. Deptuła   +2 more
semanticscholar   +1 more source

Interrelationships of Gasterosteiformes (Actinopterygii, Percomorpha)

Journal of Ichthyology, 2006
Phylogenetic relationships of Gasterosteiformes were studied using osteological examination of representatives of 11 families of gasterosteiform fishes, as ingroups, and 5 families of other smegmamorph fishes (Atheriniformes, Elassomatiformes, and Synbranchiformes), as outgroups. Based on phylogenetic analysis of 110 informative osteological characters,
Y. Keivany, J. S. Nelson
openaire   +1 more source

Deep genetic divergence and paraphyly in cryptic species of Mugil fishes (Actinopterygii: Mugilidae)

, 2020
Morphological conservatism among closely related species often results in incongruent taxonomic classification between studies, leading to disagreements about the inferred evolutionary history of the species.
Jessika M. M. Neves, João P. F. A. Almeida, M. Sturaro, N. Fabré, R. Pereira, T. Mott   +5 more
semanticscholar   +1 more source

Otolith fluctuating asymmetry in Boops boops (Actinopterygii, Sparidae) from two marine stations (Bizerte and Kelibia) in Tunisian waters

Journal of the Marine Biological Association of the United Kingdom, 2020
For the first time, saccular otolith shape and size were analysed in 254 samples of the bogue Boops boops collected from the marine stations of Bizerte and Kelibia situated in north-east Tunisia.
Mouna Ben Labidi, M. Mejri, A. A. Shahin, J. Quignard, M. Trabelsi, A. Ben Faleh   +5 more
semanticscholar   +1 more source

Sperm maturation in sturgeon (Actinopterygii, Acipenseriformes): A review

Theriogenology, 2017
The morphology of the reproductive system of acipenseriform fishes is quite different from that of teleostean species, but an associated unique physiological difference in male sturgeons was not discovered until recently; sperm of sturgeons passes through the kidneys then via Wolffian ducts into the environment rather that emptying directly through ...
Borys, Dzyuba, Jacky, Cosson, Viktoriya, Dzyuba, Pavlo, Fedorov, Olga, Bondarenko, Marek, Rodina, Otomar, Linhart, William L, Shelton, Sergii, Boryshpolets   +8 more
openaire   +2 more sources

A new species of deropristid trematode from the sterlet Acipenser ruthenus (Actinopterygii: Acipenseridae) and revision of superfamily affiliation of the family Deropristidae

, 2020
A new species, Skrjabinopsolus nudidorsalis sp. nov. is described from the sterlet Acipenser ruthenus, caught in the River Volga basin (Russia). This species differs from previously described congeners by the absence of vitelline follicles on the dorsal ...
S. Sokolov, E. Voropaeva, D. Atopkin
semanticscholar   +1 more source

Primary structure of stanniocalcin in two basal Actinopterygii

General and Comparative Endocrinology, 2004
The primary structure of stanniocalcin (STC), the principal product of the corpuscles of Stannius (CS) in ray-finned fishes, was deduced from STC cDNA clones for two species of holostean, the gar, Lepisosteus osseus and the bowfin, Amia calva. Overlapping partial cDNA clones were amplified by polymerase chain reaction (PCR) from single-strand cDNA of ...
Yutaka, Amemiya, John H, Youson
openaire   +2 more sources