Results 21 to 30 of about 117,934 (243)

Integrating Cytogenetics and Population Genomics: Allopatry and Neo-Sex Chromosomes May Have Shaped the Genetic Divergence in the Erythrinus erythrinus Species Complex (Teleostei, Characiformes)

open access: yesBiology, 2022
Diversity found in Neotropical freshwater fish is remarkable. It can even hinder a proper delimitation of many species, with the wolf fish Erythrinus erythrinus (Teleostei, Characiformes) being a notable example.
Fernando H. S. de Souza   +7 more
doaj   +1 more source

THE IMPORTANCE OF FREE STRETCHES IN A DAMMED RIVER TO THE MAINTENANCE OF Schizodon intermedius POPULATIONS

open access: yesBoletim do Instituto de Pesca, 2019
This paper focuses on to evaluate the importance of a free stretches upstream of a Neotropical reservoir for the maintenance of Schizodon intermedius populations, a medium size migratory species and important fisheries resources.
Felipe Pontieri de Lima   +5 more
doaj   +1 more source

Revealing the Satellite DNA History in Psalidodon and Astyanax Characid Fish by Comparative Satellitomics

open access: yesFrontiers in Genetics, 2022
Eukaryotic genomes are usually enriched in repetitive DNA sequences, which can be classified as dispersed or tandemly repeated elements. Satellite DNAs are noncoding monomeric sequences organized in a head-to-tail fashion that are generally located on ...
Caio Augusto Gomes Goes   +8 more
doaj   +1 more source

USING STOCK ASSESSMENT TO INVESTIGATE THE SUSTAINABLE FISHERIES OF THE YELLOW MANDI Pimelodus maculatus IN THE UPPER URUGUAY RIVER, SOUTHERN BRAZIL

open access: yesBoletim do Instituto de Pesca, 2020
The yellow mandi Pimelodus maculatus is a medium-sized species with a wide geographical distribution. The species is very common in the Neotropical region, representing an important share of fishing activity in several Brazilian reservoirs.
Gianfrancisco Schork   +4 more
doaj   +1 more source

Efeitos das mudanças climáticas sobre as comunidades de peixes na Bacia Amazônica

open access: yesREVISTA CIÊNCIAS DA SOCIEDADE, 2019
As mudanças climáticas, principalmente em decorrência das ações antrópicas, têm sido causas de impactos ambientais a nível regional e global. Dentre as regiões do planeta, a região Amazônica é uma das mais prejudicadas pelos impactos das mudanças ...
Bruna Souza Andrade   +5 more
semanticscholar   +1 more source

Características do anestésico alternativo de erva cidreira (Lippia alba) e alecrim pimenta (Lippia sidoides) em peixes

open access: yesMedicina Veterinária (UFRPE), 2019
Existem anestésicos efetivos para peixes, mas é importante buscar alternativas de substâncias de fácil aquisição e baixo custo aos piscicultores e que não ofereçam riscos à saúde aos animais e manipuladores. Por se tratar de um produto de origem natural,
A. S. Ventura   +3 more
semanticscholar   +1 more source

Investigating an Unknown Biodiversity: Evidence of Distinct Lineages of the Endemic Chola Guitarfish Pseudobatos percellens Walbaum, 1792 in the Western Atlantic Ocean

open access: yesDiversity, 2023
Anthropogenic actions have affected marine species for a long time, through overexploitation of natural stocks and habitat degradation, influencing the life strategies of several taxa, especially rays and sharks, which have suffered significant ...
Vanessa P. Cruz   +8 more
doaj   +1 more source

Peix pesant?

open access: yesEducació Química : EduQ, 2008
Estudi de la concentració de diversos metalls pensants (cadmi, coure, plom, zinc i níquel) en dos aliments d'origen marí (salmó i musclos) mitjançant la tècnica d'espectrofotometria d'absorció atòmica i fem una comparació dels resultats amb els límits establerts en la normativa vigent.
Riera Palomino, Adrià   +1 more
openaire   +2 more sources

Uso de peixes como biomarcadores para monitoramento ambiental aquático

open access: yes, 2017
A contaminacao de ambientes aquaticos e de aguas para utilizacao publica torna-se um problema cada vez maior a medida que o crescimento populacional humano amplia-se, aumentando tambem a demanda por agua de qualidade e em quantidade suficiente.
Jose Augusto Pereira Navarro Lins   +3 more
semanticscholar   +1 more source

EVALUATION OF NEOMALE Rhamdia quelen PROGENY GROWING AT VARIOUS STOCKING DENSITIES

open access: yesBoletim do Instituto de Pesca, 2019
Monosex female jundiá (Rhamdia quelen) generated through indirect sex reversal may have their growth influenced by the stocking density, which is an important factor for production in fish farming. Since zootechnical data from R.
Vanessa Martins da ROCHA   +3 more
doaj   +1 more source

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