Results 91 to 100 of about 12,679 (227)

Mercury bioaccumulation in fishes of a paddy field in Southern of Brazil

open access: yesActa Limnologica Brasiliensia, 2015
Aim: The aim of present study was to evaluate the Hg concentration in two species of fish (Astyanax sp and Corydoras paleatus) and its potential use as a biomonitor, in order to know if the use of pesticides and fertilizers in paddy can enhance the Hg ...
Vinicius Tavares Kütter   +5 more
doaj   +1 more source

Fish, Corumbataí and Jacaré-Pepira river basins, São Paulo State, Brazil [PDF]

open access: yes, 2006
Fish were studied in two river basins (Corumbataí and Jacaré-Pepira) subjected to strong human pressure, in the interior of the State of São Paulo, southeastern Brazil.
Braga, F. M. S., Gomiero, L. M.
core  

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

open access: yesRevista de Biología Tropical, 2008
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 ...
William A Bussing
doaj  

Plasticity in the diet of Astyanax taeniatus in a coastal stream from south-east Brazil

open access: yesBrazilian Journal of Biology
In this work we aimed to characterise the diet of Astyanax taeniatus (Jenyns 1842) (Characiformes, Characidae) along the Mato Grosso stream and we hypothesised that the diet of this species would vary according to spatial, seasonal and ontogenetic ...
LR. Manna, CF. Rezende, R. Mazzoni
doaj   +1 more source

Complete mitochondrial genome sequence of neotropical fish Astyanax giton Eigenmann 1908 (Ostariophysi; Characidae)

open access: yesMitochondrial DNA. Part B. Resources, 2017
Here we report, for the first time, the complete mitochondrial genome of Astyanax giton which, together with other species, are popularly known as tetras.
Cynthia Aparecida Valiati Barreto   +4 more
doaj   +1 more source

Catálogo de ejemplares tipo de la colección ictiológica del Museo de La Plata [PDF]

open access: yes, 2014
Fil: Miquelarena, Amalia María. División Zoología Vertebrados. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Nadalin, Diego Oscar. División Zoología Vertebrados.
Miquelarena, Amalia María   +1 more
core  

Biologia reprodutiva e indução de micronúcleos em Astyanax spp : expostos às aguas do Rio Jacutinga, Sul do Brasil [PDF]

open access: yes, 2017
O estudo teve como objetivo avaliar a biologia reprodutiva e o percentual de micronúcleos (MN) em eritrócitos de Astyanax spp. Foram comparadas duas porções do Rio Jacutinga-SC, uma área alagada pela Usina Hidrelétrica de Itá-SC
Armiliato, Neide   +2 more
core  

EVOLUTION OF THE CIRCADIAN CLOCK IN EXTREME ENVIRONMENT: LESSONS FROM CAVEFISH. [PDF]

open access: yes, 2010
Evolution has been strongly influenced by the daily cycles of temperature and light imposed by the rotation of the Earth. Fascinating demonstrations of this are seen in extreme environments such as caves where some animals have remained completely ...
Cavallari, Nicola
core  

Análise da variação ontogenética da assinatura isotópica de Cyanocharax alburnus (Teleostei, Characiformes) [PDF]

open access: yes, 2011
A análise de isótopos estáveis está sendo cada vez mais utilizadas para o entendimento da real assimilação de nutrientes e da posição trófica de organismos.
Batista, Cibele Boeira
core  

Prevalence and intensity of black-spot disease in fish community from a subtropical stream (Santa Lucía river basin, Uruguay) [PDF]

open access: yes, 2008
The objective of the present study was to identify fish species susceptible to black spot disease, the temporal variation in intensity prevalence and abundance of black spot, and its correlation with environmental and host parameters.
Eguren, Gabriela   +1 more
core  

Home - About - Disclaimer - Privacy