Results 71 to 80 of about 860,253 (247)

Elevated Blood Hemoglobin in Different Cavefish Populations Evolves Through Diverse Hemoglobin Gene Expression Patterns

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, Volume 344, Issue 4, Page 175-181, June 2025.
Distinct populations of the cave‐dwelling fish, Astyanax mexicanus, have adapted to low oxygen through the upregulation of hemoglobin gene expression. This work demonstrates that diverse transcriptomic mechanisms have evolved for hypoxic adaptation via different hemoglobin genes.
Tyler E. Boggs, Joshua B. Gross
wiley   +1 more source

Relationships among major lineages of characid fishes (Teleostei: Ostariophysi: Characiformes), based on molecular sequence data

Molecular Phylogenetics and Evolution, 2010
The family Characidae is a group of freshwater bony fishes that exhibits high species-level diversity and whose members inhabit parts of Texas, Mexico, and Central and South America. Thus far, morphological data have been of limited use in discerning relationships among subfamilies and incertae sedis genera of the family Characidae.
Robert, Javonillo, Luiz R, Malabarba, Stanley H, Weitzman, John R, Burns   +3 more
openaire   +2 more sources

Three new species of Bryconamericus (Characiformes, Characidae), with keys for species from Ecuador and a discussion on the validity of the genus Knodus [PDF]

Animal Biodiversity and Conservation, 2013
Three new species of characid fishes of the genus Bryconamericus are described from the Pacific coast and Amazon Basin in Ecuador, based on pigmentation and morphometric, meristic and osteological characters. B.
Román–Valencia, C., Ruiz–C., R. I., Taphorn B., D. C., García–A., C.   +3 more
doaj  

Phosphoglucose isomerase gene duplication in the bony fishes: an evolutionary history. [PDF]

, 1973
Electrophoretic patterns of phosphoglucose isomerase (PGI) in bony fishes provide strong evidence for a model of genetic control by two independent structural gene loci, most likely resulting from a gene duplication.
Avise, JC, Kitto, GB
core  

Revisiting the History of Ornamental Aquaculture in Europe to Understand the Benefits and Drawbacks of Freshwater Fish Imports

Reviews in Aquaculture, Volume 17, Issue 2, March 2025.
ABSTRACT Ornamental aquaculture and fishkeeping are very popular with millions of enthusiasts worldwide. The number of newly imported fish species for ornamental purposes grew slowly from World War I until the 1980s. It then exponentially increased until now with more than 7900 species and a large number of scientifically undescribed morphotypes.
Jindřich Novák, Dieter Hohl, Martin Stuchlík, Jaroslav Hofmann, Michael F. Tlusty, André Lincoln Barroso Magalhães, Alberto Maceda‐Veiga, Surya Gentha Akmal, Gen Hua Yue, Pradeep Kumkar, Sean M. Marr, Joseph R. Sara, Nir Stern, Andrew L. Rhyne, James M. Furse, Lukáš Kalous, Jiří Patoka   +16 more
wiley   +1 more source

Mutilating predation in the Cheirodontinae Odontostilbe pequira (Characiformes: Characidae)

Neotropical Ichthyology
We observed individuals of Odontostilbe pequira, a small characid, approaching and biting individuals of larger-bodied fishes of other species. This observation was made in two clear water headwater streams of the Cuiabá basin, Paraguay River system ...
Monise R. L. Lima, Eduardo Bessa, Diones Krinski, Lucélia Nobre Carvalho   +3 more
doaj   +1 more source

بررسی اثر ديازينون بر آنزيم‌های آنتی‌اکسيدان و پراکسيداسيون ليپيدهای مغز موش صحرايی [PDF]

, 2010
زمينه و هدف: ارگانوفسفره ها سبب افزايش توليد راديكالهاي آزاد و تخريب سيستم آنتي اكسيدانت بدن مي گردند. ديازينون يكي از گسترده ترين ارگانوفسفره هايي است كه امروزه در كشاورزي بكار مي رود.
جعفری, مهوش, حاج غلامعلی, منصوره, سليميان, محمد, صالح مقدم, مسعود, صالحی, مریم, عباس نژاد, مریم, عسگری, علیرضا   +6 more
core  

Resposta das comunidades de peixes a intensa seca em riachos de savana brasileira [PDF]

, 2017
Os riachos são submetidos a intensas mudanças na sua estrutura física ao longo das estações. Secas intensas nos períodos de estiagem tem sido frequentes e potencialmente deletérias para as espécies aquáticas.
Silva, Dianne Michelle Alves da, Teresa, Fabrício Barreto   +1 more
core   +1 more source

River Geomorphology and Fish Diversity Around the Manseriche Gorge, the Last Andean Crossing Is in Peril

Water Resources Research, Volume 60, Issue 11, November 2024.
Abstract The transition from the Andes to the Amazon lowland hosts a high biodiversity and currently is facing several anthropogenic activities, including hydropower infrastructure projects. Little is known about the geomorphology of the Andean gorges, rivers and the interaction with the fish diversity upstream and downstream of gorges.
J. D. Abad, H. Chicchon, J. Chuctaya, A. Mendoza, H. Valverde, C. Oshiro, M. Montoya   +6 more
wiley   +1 more source

Structural and functional evidence that a B chromosome in the characid fish Astyanax scabripinnis is an isochromosome [PDF]

Heredity, 2000
Astyanax scabripinnis possesses a widespread polymorphism for metacentric B chromosomes as large as the largest chromosome pair in the A complement. On the basis of C-banding pattern, it was hypothesized that these B chromosomes are isochromosomes that have arisen by means of centromere misdivision and chromatid nondisjunction.
Mestriner, C. A., Galetti, P. M., Valentini, Sandro Roberto, Ruiz, IRG, Abel, LDS, Moreira, O., Camacho, JPM   +6 more
openaire   +3 more sources