Results 61 to 70 of about 1,864 (206)

Temporal and Ontogenetic Changes in Feeding Ecology of a Characid From Karst Dolines of the Neotropics

Ecology of Freshwater Fish, Volume 34, Issue 4, October 2025.
ABSTRACT Environmental and biological factors strongly shape fish diets, yet little is known about such influences in flooded Karst Dolines of the Neotropical region. This study examined the diet of Deuterodon luetkenii and assessed its temporal and ontogenetic variation in Lagoa Misteriosa, a karstic lagoon. Fish were sampled bimonthly over 1 year and
Amanda Menegante Caldatto, Rosa Maria Dias, Fernando César Paiva Dagosta, Anderson Ferreira   +3 more
wiley   +1 more source

Neocucullanus neocucullanus Travassos, Artigas et Pereira, 1928 (Nematoda: Cucullanidae) from the Characidae fish, Brycon hilarii Valenciennes, 1850, from Brazil

Memorias do Instituto Oswaldo Cruz, 2006
During investigation on the helminth parasites from Brycon hilarii Valenciennes, 1850 (Characiformes, Characidae), from River Juba, Tangará da Serra, state of Mato Grosso, Brazil, several specimens of the nematode Neocucullanus Travassos, Artigas et ...
Aurélia Saraiva, Fabiana Aparecida da Silva, Ângela Teresa Silva-Souza   +2 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  

Redescription of Cheirodon Ibicuiensis Eigenmann, 1915 (Characiformes: Cheirodontinae), with Notes on its Distribution in Argentina [PDF]

, 2008
Cheirodon ibicuhiensis Eigenmann, 1915, is redescribed including new anatomical data based on material collected at sixteen localities in the Lower Paraná and Lower Uruguay River basins in Argentina.
Mantinian, Julia Erika, Miquelarena, Amalia Maria, Scarabotti, Pablo Augusto   +2 more
core   +2 more sources

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

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

Astyanax cocibolca, a new characid (Pisces: Ostariophysi) from Lake Nicaragua, Central America

Revista de Biología Tropical, 2007
Astyanax cocibolca, a small filter-feeding species is a new characid species endemic to Lake Nicaragua. It is distinguished from the syntopic Astyanax aeneus by its high gill raker count, slender body, upturned snout, long maxillary bones, conical outer premaxillary teeth, lower number of scales above lateral line, more intense black lateral band ...
openaire   +7 more sources

Spermiogenesis and spermatozoa ultrastructure in the Serrasalminae (Ostariophysi: Characiformes) with further evidence on the relationships of the piranhas and pacus

Neotropical Ichthyology
Spermatozoa and spermiogenesis ultrastructure were studied in the serrasalmine species Piaractus mesopotamicus, Mylossoma duriventre, Serrasalmus maculatus, and Metynnis mola and two distinct patterns may be recognized: the first common to Mylossoma ...
Priscila Gusmão-Pompiani, Luiz R. Malabarba, Claudio Oliveira, Irani Quagio-Grassiotto   +3 more
doaj   +1 more source

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  

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