Results 51 to 60 of about 1,336 (204)

Fish distribution across altitudinal gradients in the Upper Paraguay River Basin: Implications for conservation in the Pantanal region

Conservation Science and Practice, Volume 7, Issue 7, July 2025.
This paper approaches the patterns in fish distribution across the altitudinal gradient in the Upper Paraguay River basin, from uplands to the floodplain. We compiled more than 75,000 available fish records and registered 342 fish species and your distribution along altitudinal gradient. Floodplain portion have higher species diversity than headwaters,
Adriana Maria Espinoza Fernando, Francisco Severo‐Neto, Fabiane Silva Ferreira, Lúcia Mateus, Karina K. Tondato‐Carvalho, Elaine Antoniassi Luiz Kashiwaqui, Heriberto Gimenes Junior, Wladimir M. Domingues, Carla Simone Pavanelli, Henrique Ledo Lopes Pinho, Jerry Penha, Yzel Rondon Súarez   +11 more
wiley   +1 more source

A new Hyphessobrycon (Characiformes: Acestrorhamphidae) from the rio Mamuru basin, Amazonas State, Brazil [PDF]

Neotropical Ichthyology
A new species of Hyphessobrycon from the rio Mamuru basin, Pará State, Brazil, is described. The new species is similar to two congeners, Hyphessobrycon hildae and Hy. taguae, and to a non-congener, Hemigrammus bellottii, by the presence of a conspicuous,
Tiago C. Faria, Claudio Oliveira, Iann Leonardo Pinheiro Monteiro, Flávio César Thadeo de Lima   +3 more
doaj   +1 more source

Caracterização da ictiofauna durante as estações de inverno e verão na ressaca da Lagoa dos Índios, Macapá - AP. [PDF]

, 2011
Resumo ...
BRANDÃO, R. M. L., LIMA, D. P., SANTOS, C.   +2 more
core  

The fish fauna of the Iwokrama Forest [PDF]

, 2005
Fishes were collected from the rivers in and around the Iwokrama Forest during January-February and November-December 1997. Four hundred species of fish were recorded from forty families in ten orders.
Arjoon, D, Bicknell, Jake E., Holm, E, Saul, W, Watkins, G, Watson, C   +5 more
core   +1 more source

“Split Happens”: a Rare Case of Chromosomal Mosaicism in Characin from an Impacted River Basin [PDF]

Brazilian Archives of Biology and Technology
Chromosomal polymorphisms have been reported in numerous vertebrates, including fishes. Such variation is usually related to karyoevolutionary trends and speciation but might also be a result of environmental stress.
Mauricio Barros Fernandes, Jamille de Araújo Bitencourt, José Henrique Galdino, André Teixeira da Silva, Paulo Roberto Antunes de Mello Affonso   +4 more
doaj   +1 more source

A new characid species with remarkable sexual dimorphism (Characiformes: Characidae: Stevardiinae) from the upper Guayabero River, Orinoco basin, Colombia

Journal of Fish Biology, Volume 104, Issue 6, Page 1947-1959, June 2024.
Abstract A new species of characid with remarkable sexual characteristics is described from the upper Guayabero River drainage from the Orinoco basin in Colombia. The new species is included in the genus Monotocheirodon by sharing most of the previously proposed diagnostic features of this genus.
Tiago P. Carvalho, Andréa Tonolli Thomaz, Alexander Urbano‐Bonilla, Saúl Prada‐Pedreros   +3 more
wiley   +1 more source

The efficacy of clove oil as an anaesthetic and in euthanasia procedure for small-sized tropical fishes

Brazilian Journal of Biology
Clove oil is used as a fish anesthetic because it is a natural and inexpensive product with low toxicity risks. The goal of the present study was to determine the appropriate concentration of clove oil for small-sized tropical fish to be used in mark ...
I. M. Fernandes, Y. F. Bastos, D. S. Barreto, L. S. Lourenço, J. M. Penha   +4 more
doaj   +1 more source

A phylogenetic analysis of Brycon and Henochilus (Characiformes, Characidae, Bryconinae) based on the mitochondrial gene 16S rRNA [PDF]

, 2008
The genus Brycon, the largest subunit of the Bryconinae, has 42 valid species distributed from southern Mexico to the La Plata River in Argentina. Henochilus is a monotypic genus, comprising a single species (H.
HILSDORF, Silva, LIMA, Flávio César Thadeo de, MATSUMOTO, Cristianne Kayoko, OLIVEIRA, Claudio   +3 more
core   +2 more sources

Sensing in the dark: Constructive evolution of the lateral line system in blind populations of Astyanax mexicanus

Ecology and Evolution, Volume 14, Issue 4, April 2024.
Previous studies predominantly investigated eye regression in cavefish evolution, but less is known about constructive evolution of non‐visual sensory systems in subterranean species. This review highlights our state of knowledge on mechanosensory lateral line expansions in Astyanax mexicanus, emphasizing anatomical features, synaptic plasticity, and ...
Roberto Rodríguez‐Morales
wiley   +1 more source

Trophic ecology and condition factor of two sympatric species of Hemigrammus from a stream of the Negro River Basin, Brazilian Amazon

Brazilian Journal of Biology
This study aimed to evaluate the diet and condition factor of Hemigrammus levis and Hemigrammus coeruleus in a stream in the Tupé Sustainable Development Reserve, in the lower Negro River region, and contribute information on the biology of small species
M. Garrido, C. Lubich, K. C. Yamamoto
doaj   +1 more source