Results 51 to 60 of about 4,539 (221)

Requerimiento proteico del pez juvenil Metinnys orinocencis (Characiformes: Characidae)

Revista de Biología Tropical, 2019
Introducción: La moneda o pez dólar, Metynnis orinocensis, es una de las especies ornamentales nativas de Colombia, con gran participación en el mercado internacional. Habitan principalmente en lagunas permanentes y áreas de inundación de las cuencas de los ríos Amazonas y Orinoco. Es una especie que ha sido reproducida en cautiverio.
Mariana Catalina Gutiérrez-Espinosa, Juan Sebastian Velasco Garzon   +1 more
openaire   +3 more sources

A new miniature characid (Ostariophysi: Characiformes: Characidae), with phylogenetic position inferred from morphological and molecular data. [PDF]

PLoS ONE, 2013
Erythrocharax altipinnis is described from the Serra do Cachimbo, Pará, Brazil. The new taxon is distinguished from all of the Characidae genera by having the pelvic bones firmly attached through the isquiatic processes; a nearly triangular hiatus in the
André Luiz Netto-Ferreira, José Luís Olivan Birindelli, Leandro Melo de Sousa, Tatiane Casagrande Mariguela, Claudio Oliveira   +4 more
doaj   +1 more source

Local Environmental Variables Predict Fish Species Richness and Composition in Sand Beaches of a Neotropical River

River Research and Applications, Volume 41, Issue 9, Page 1949-1958, November 2025.
ABSTRACT Local and regional species diversity is influenced by historical factors, resource availability, biotic interactions, the presence of resources, and adequate environmental conditions. We evaluated the effects of local environmental variables and spatial structure on fish species richness and composition along sandy beaches of a Neotropical ...
Ronaldo Souza da Silva, Jean Carlo Gonçalves Ortega, Lucas Pires de Oliveira, Vinicius Guerra, Werther Pereira Ramalho, Fabiano Corrêa, Mariana Costa Fratari, Lisandro Juno Soares Vieira, Luciano Fogaça Assis de Montag   +8 more
wiley   +1 more source

Ampliación de la distribución geográfica de Microgenys minuta Eigenmann 1913 (Characiformes, Characidae) en la cuenca del río Magdalena, Colombia

Biota Colombiana, 2017
Se amplía la distribución de Microgenys minuta (Characiformes, Characidae) desde la sección medio-alta del río Cauca y el tramo alto del río Magdalena hasta la porción media de la cuenca del río Magdalena, con base en ejemplares colectados en el ...
Lina M. Mesa S., Juan Gabriel Albornoz
doaj   +1 more source

[A new fish species Hemibrycon (Characiformes: Characidae)].

Revista de biologia tropical, 2008
Hemibrycon pautensis (Characiformes, Characidae), a new fish species from Paute River, eastern Ecuador is described. Diagnostic characteristics: eight to nine branched rays in the dorsal fin (vs. six to seven), and 27 - 28 in the anal fin (vs. 16 - 26, except in H. dariensis which presents 22 - 27, in H. metae 26 - 31 and H.
César, Román-Valencia, Raquel I, Ruiz, Ramiro, Barriga   +2 more
openaire   +2 more sources

Effects of Land Use and Environmental Characteristics on Condition Factor and Reproductive Aspects of Serrapinnus notomelas (Brazil)

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 35, Issue 8, August 2025.
ABSTRACT Changes in land use and land cover severely impact the ecological structure of aquatic ecosystems and can lead to losses in fish populations. To further examine the cause and effect, the present study aimed to evaluate (1) differences in land use and cover among subbasins of the Vacaria, Brilhante, Dourados and Lower Ivinhema Rivers, (2 ...
Bianca de Oliveira Souza, Lucilene Finoto Viana, Yzel Rondon Súarez, Sidnei Eduardo Lima‐Junior   +3 more
wiley   +1 more source

Heterochromatin patterns and karyotype relationships within and between the genera Brycon and Salminus (Pisces, Characidae)

Genetics and Molecular Biology, 1999
Chromosomes of two Brycon species (B. lundii and B. microlepis) and Salminus hilarii were analyzed. Based on constitutive heterochromatin distribution patterns, karyotypic relationships within and between Bryconinae and Salmininae were examined.
Vladimir Pavan Margarido, Pedro Manoel Galetti Junior   +1 more
doaj   +1 more source

Citogenética molecular e evolutiva na família Characidae [PDF]

, 2021
Some species of the genus Moenkhausia have already been studied cytogenetically, and the presence of B chromosomes is considered an interesting feature of these fish. These dispensable supernumerary elements that do not recombine with the standard chromosomes and follow their own evolutionary mechanism vary in number, morphology and distribution, as ...
openaire   +2 more sources

New host records and description of the egg of Anacanthorus penilabiatus (Monogenea, Dactylogyridae)

Memorias do Instituto Oswaldo Cruz, 2001
Anacanthorus penilabiatus is referred parasitizing the type-host Piaractus mesopotamicus (Serrasalmidae) and two new hosts, Colossoma macropomum and C.
MC Pamplona-Basilio, A Kohn, VA Feitosa
doaj   +1 more source

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