Results 41 to 50 of about 15,116 (182)

Morphometric synthesis of Pollimyrus (Teleostei, Mormyridae) with the description of four new species

Journal of Fish Biology, Volume 106, Issue 3, Page 846-892, March 2025.
Abstract Mormyridae, a species‐rich family endemic to Africa, remains taxonomically understudied. This has been the case for the genus Pollimyrus Taverne, 1971, which hinders further understanding of the distribution, ecology, and conservation of its species.
Katrien Dierickx, Soleil Wamuini Lunkayilakio, Roger Bills, Emmanuel Vreven   +3 more
wiley   +1 more source

Estudo morfológico do tecido hepático de Leporinus macrocephalus = Morphological study of the hepatic tissue of Leporinus macrocephalus

Acta Scientiarum: Biological Sciences, 2007
O presente trabalho objetivou análise macroscópica e histológica do fígado de Leporinus macrocephalus para avaliar a estrutura do tecido hepático. Os peixes provenientes de um pesqueiro da região de Bauru, Estado de São Paulo, foram anestesiados, mortos,
Maria Terezinha Siqueira Bombonato, Sabrina Santos Rochel, Carlos Alberto Vicentini, Irene Bastos Franceschini Vicentini   +3 more
doaj  

18S rRNA Metagenomic Analysis of Nodular Gill Disease in Swiss Rainbow Trout (Oncorhynchus mykiss)

Journal of Fish Diseases, Volume 48, Issue 3, March 2025.
ABSTRACT Nodular gill disease (NGD) is a serious proliferative gill condition that affects farmed salmonids, particularly in Europe. While the cause of NGD remains unknown (and maybe multifactorial), various amoebae are often isolated from the gills of affected fish and can in some cases be seen associated with lesions by histopathology.
James W. Wynne, Chloe J. English, Stefania M. Vannetti, Megan Rigby, Petra R. Quezada‐Rodriguez, Ralph Knüsel, Christine Huynh, Heike Schmidt‐Posthaus   +7 more
wiley   +1 more source

Evidence for Variation in the Genetic Basis of Sex Determination in Brook Stickleback (Culaea inconstans)

Ecology and Evolution, Volume 15, Issue 2, February 2025.
The genetic basis of sex determination is typically conserved. In brook stickleback, we found that the genetic sex did not match the phenotypic sex in up to 44% of individuals per population. Within‐species variation in genetic sex determination provides an opportunity to investigate how and why transitions in sex‐determination mechanisms occur ...
Grace C. Pigott, Massa Abo Akel, Malcolm G. Q. Rogers, Marin E. Flanagan, Erica G. Marlette, Matthew J. Treaster, Shannon K. Fox, Shaugnessy R. McCann, Catherine L. Peichel, Michael A. White, Daniel L. Jeffries, Jonathan A. Mee   +11 more
wiley   +1 more source

Sahyadria, a new genus of barbs (Teleostei: Cyprinidae) from Western Ghats of India

Journal of Threatened Taxa, 2013
Redline Torpedo Barbs (Teleostei: Cyprinidae), comprising of two species, Puntius denisonii and P. chalakkudiensis, and six evolutionarily distinct lineages are endemic to the streams of the Western Ghats freshwater ecoregion in peninsular India.
R. Raghavan, S. Philip, A. Ali, N. Dahanukar   +3 more
doaj   +1 more source

Factors determining parasite abundance in European perch, Perca fluviatilis, European whitefish, Coregonus lavaretus, and Arctic charr, Salvelinus alpinus, in an oligotrophic lake, southern Norway

Fauna Norvegica, 2020
Time and spatial variations in macroparasite status were investigated in European perch, Perca fluviatilis, European whitefish, Coregonus lavaretus, and Arctic charr, Salvelinus alpinus in Lake Norsjø (Southern Norway), based on gillnet fishing in three ...
Tom Robin Olk, Ann-Cecilie Henriksen, Solveig Irene Dolven, Mathias Leithe Haukø, Espen Lydersen, Tor Atle Mo   +5 more
doaj   +1 more source

Post-testicular sperm maturation in ancient holostean species

Scientific Reports, 2023
Fish speciation was accompanied by changes in the urogenital system anatomy. In evolutionarily modern Teleostei, male reproductive tracts are fully separated from the excretory system, while in evolutionarily ancient Chondrostei and Holostei, the ...
Viktoriya Dzyuba, William L. Shelton, Ana E. Hiott, Jacky Cosson, Olga Bondarenko, Vitaliy Kholodnyy, Borys Dzyuba   +6 more
doaj   +1 more source

Assembly of Mitochondrial Genomes Using Nanopore Long‐Read Technology in Three Sea Chubs (Teleostei: Kyphosidae)

Molecular Ecology Resources, Volume 25, Issue 1, January 2025.
ABSTRACT Complete mitochondrial genomes have become markers of choice to explore phylogenetic relationships at multiple taxonomic levels and they are often assembled using whole genome short‐read sequencing. Herein, using three species of sea chubs as an example, we explored the accuracy of mitochondrial chromosomes assembled using Oxford Nanopore ...
J. Antonio Baeza, Jeremiah J. Minish, Todd P. Michael   +2 more
wiley   +1 more source

Five new species of Hemibrycon (Characiformes: Characidae) from the Río Magdalena basin, Colombia

Revista de Biología Tropical, 2010
Five new fish species of the genus Hemibrycon are described from the Río Magdalena basin, Colombia, using morphometric, meristic and osteological characters. Hemibrycon paez (n=40) differs in number of lateral line scales (39 to 42 vs.
César Román-Valencia, Dahiana K Arcila-Mesa   +1 more
doaj  

Feeding habits of splendid alfonsino Beryx splendens in the vicinity of Kuroshio, the south of Japan

Fisheries Oceanography, Volume 34, Issue 1, January 2025.
Abstract Gut contents and nitrogen isotope ratio (δ15N) analyses were conducted on splendid alfonsino Beryx splendens collected in the vicinity of Kuroshio from May 2015 to November 2016 (n = 708) to identify their feeding habits in the Western North Pacific.
Taketoshi Kodama, Koichi Ishii, Sachiko Horii, Natsuki Gonda, Junji Yonezawa, Kazuto Ando, Kazutaka Takahashi   +6 more
wiley   +1 more source