Results 41 to 50 of about 860,253 (247)

Studies on the ecology of the African longfin tetra, Brycinus longipinnis Gżnther, 1864 in the Jamieson River (Niger Delta, Nigeria). [PDF]

open access: yesActa Ichthyologica et Piscatoria, 2003
Background. African longfin tetra, Brycinus longipinnis Gżnther, 1864, an ornamental fish, commonly occurs in a number of African rivers. The aim of the present paper was to describe elements of ecology of this fish, not hitherto studied in the Niger ...
R.B. Ikomi, F.D. Sikoki
doaj   +3 more sources

Phycocharax rasbora, a new genus and species of Brazilian tetra (Characiformes: Characidae) from Serra do Cachimbo, rio Tapajós basin. [PDF]

open access: yesPLoS ONE, 2017
A new genus and species of characid fish is described from rio Braço Norte, a tributary of rio Teles Pires, Tapajós basin, Mato Groso, Brazil. The new taxa can be diagnosed from the remaining characids by a unique combination of characters that includes ...
Willian Massaharu Ohara   +2 more
doaj   +1 more source

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

open access: yesMemorias 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   +2 more
doaj   +1 more source

Predator avoidance in extremophile fish [PDF]

open access: yes, 2013
Extreme habitats are often characterized by reduced predation pressures, thus representing refuges for the inhabiting species. The present study was designed to investigate predator avoidance of extremophile populations of Poecilia mexicana and P ...
Arias-Rodriguez, Lenin   +7 more
core   +2 more sources

Variación morfológica de las especies de Astyanax, subgénero Zygogaster (Teleostei, Characidae) [PDF]

open access: yesAnimal Biodiversity and Conservation, 2011
Morphological variation of Astyanax species, subgenus Zygogaster (Teleostei, Characidae) The diverse Neotropical fish genus Astyanax inhabits a variety of aquatic environments. As with other species in this genus, the taxonomic status and phylogenetic
Ruiz-C., R. I.   +4 more
doaj  

On Dactylogyridae (Monogenea) of four species of characid fishes from Brazil

open access: yesCheck List, 2009
Material collected from the fishes from the dams and fish farms of the Departamento Nacional de Obras contra as Secas (DNOCS) and from the tanks of the Itaipu Hydroelectric Station was examined in order to analyze the index and the infestation of Monogenea.
Cohen, S. C., Kohn A.
openaire   +4 more sources

Helminth parasites of alien freshwater fishes in Patagonia (Argentina) [PDF]

open access: yes, 2018
A survey of the helminth parasites of alien freshwater fishes from Argentinean Patagonia is presented, based on samples taken from 2010 to 2017 and including previous published records.
Flores, Verónica Roxana   +5 more
core   +1 more source

Influence of environmental quality on the diet of Astyanax in a microbasin of central western Brazil - doi: 10.4025/actascibiolsci.v35i2.15570

open access: yesActa Scientiarum: Biological Sciences, 2012
This study analyzed physicochemical characteristics of the water, degradation of the surroundings and the influence of these factors on the diet of two fish species of Astyanax in Tarumã stream microbasin, central western Brazil.
Rosangela Guarisso de Souza   +1 more
doaj   +1 more source

A fractal pattern of hierarchical genetic population structure in mixed stocks across fish segregated by dams revealed by genomic resources for curimba Prochilodus lineatus

open access: yesJournal of Fish Biology, EarlyView.
Abstract Genomic resources, new microsatellite markers and a novel observation of a fractal pattern in the genetic population structure are presented for curimba, Prochilodus lineatus, a freshwater migratory model species of South America. Our main goals were to investigate the presence of mixed fish stocks and the effects of damming‐induced ...
Gabriel M. Yazbeck   +5 more
wiley   +1 more source

Ossification of the cranium of Inpaichthys kerri (Characiformes: Acestrorhamphidae) with discussion of paedomorphic traits in the genus

open access: yesJournal of Anatomy, EarlyView.
In this study, we present a detailed description of the cranial development of Inpaichthys kerri (Characiformes: Acestrorhamphidae), highlighting important topics such as pedomorphic characters and their relationship with ontogeny and phylogeny, as well as ossification sequences unique to the species. Abstract The study of development provides valuable
Yasmim De Santana Santos   +1 more
wiley   +1 more source

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