Results 91 to 100 of about 4,670 (210)

Effects of dietary methylmercury on liver and kidney histology in the neotropical fish Hoplias malabaricus

open access: yesEcotoxicology and Environmental Safety, 2007
Methylmercury is a potent toxic present in Amazonian fish species due to gold mining activities. In the present work, we investigated the morphological effects of methylmercury in liver and kidney of Hoplias malabaricus feeding contaminated prey fish over 70 days.
M, Mela   +5 more
openaire   +2 more sources

Long‐Term Effects of Land Use and Cover Change and Dam Rupture on Ichthyofauna in a Neotropical Stream

open access: yesInternational Review of Hydrobiology, Volume 110, Issue 1, Page 5-12, June 2025.
ABSTRACT This study evaluates land use and land cover (LULC) changes and their impacts on the fish community of a neotropical stream in the Sorocaba River basin, Brazil, from 2006 to 2023. The watershed experienced landscape changes over time, categorized into four periods: rural interventions, urban interventions, restorative interventions, and post ...
Nícholas de P. Nicomedes   +8 more
wiley   +1 more source

Development of microsatellite markers for Hoplias malabaricus (Erythrinidae).

open access: yesGenetics and molecular research : GMR, 2010
We identified 14 microsatellite loci for the wolf fish, Hoplias malabaricus (Erythrinidae), from a genomic shotgun library. Twenty-five primers were designed, and 48 individuals of H. malabaricus from four localities of northwest Goiás, in central Brazil, were genotyped to characterize the polymorphism at each locus.
S G C A, Gondim   +6 more
openaire   +1 more source

The fish fauna in tropical rivers: The case of the Sorocaba river basin, SP, Brazil

open access: yesRevista de Biología Tropical, 2003
A survey was carried out on the fish species in the Sorocaba River basin, the main tributary of the left margin of the Tietê River, located in the State of São Paulo, Brazil. The species were collected with gill nets.
Welber Senteio Smith   +2 more
doaj  

Distribution pattern of two fish species in a coastal stream in Southeast Brazil

open access: yesBrazilian Journal of Biology
Longitudinal distribution of Mimagoniates microlepis and Hoplias malabaricus was analyzed in a coastal stream system in Southeast Brazil. Six sites were sampled by electrofishing in seven months, from July 94 to July 95. Densities of M. microlepis, and H.
R. MAZZONI, R. IGLESIAS-RIOS
doaj   +1 more source

Infecção e susceptibilidade de três espécies de peixe do rio Paraná, Presidente Epitácio, Estado de São Paulo, Brasil, a larvas de Contracaecum sp. (Nematoda: Anisakidae) - DOI: 10.4025/actascianimsci.v25i1.2096

open access: yesActa Scientiarum: Animal Sciences, 2008
Estudou-se a infecção por Contracaecum sp. (Nematoda: Anisakidae) em tucunarés (Cichla ocellaris), corvinas (Plagioscion squamosissimus) e traíras (Hoplias malabaricus) provenientes do rio Paraná próximo à cidade de Presidente Epitácio, região ainda não ...
Maurício Laterça Martins   +4 more
doaj   +1 more source

Long‐term interventions by conservation and development projects support successful recovery of tropical peatlands in Amazonia

open access: yesPeople and Nature, Volume 7, Issue 4, Page 871-886, April 2025.
Abstract Rural communities in Amazonia rely on harvesting Mauritia flexuosa fruit, a dominant peatland palm, for their subsistence and income. However, these palms are felled to harvest the fruits, which has led to reduced resource availability due to the pressure exerted by the increasing fruit demand.
Eurídice N. Honorio Coronado   +24 more
wiley   +1 more source

LEVANTAMENTO PARASITOLÓGICO EM Hoplias Malabaricus, Bloch, (1794) (TRAIRA) DE ÁGUAS DA REGIÃO DE SANTA MARIA - RS

open access: yesCiência Rural, 1992
No presente trabalho estudou-se os parasitos encontrados em 139 traíras coletadas nas diferentes estações do ano em lagoas e açudes do município de Santa Maria, RS.
Ana Maria Weiblen   +1 more
doaj   +1 more source

Fishes of the Lagunas Encadenadas (Province of Buenos Aires, Argentina), a wetland of international importance [PDF]

open access: yes, 1995
The Lagunas Encadenadas form a large endorheic wetland. The system comprises a chain of five main lagoons (Alsina, Chochico, Del Monte, Del Venado, and Epecuen). During two recent collection trips, 13 species of fish were caught.
Lopez, Hugo L, Miquelarena, Amalia M
core  

Estudio de la dentición en peces caracoideos de la República Argentina [PDF]

open access: yes, 1986
Fil: Miquelarena, Amalia María.
Miquelarena, Amalia María
core  

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