Results 81 to 90 of about 2,707 (214)

Comunidades de peixes da RPPN Sesc Pantanal. [PDF]

open access: yes, 2019
As comunidades de peixes ao longo de 74,75 km do rio Cuiabá e áreas circundantes, na Reserva Particular do Patrimônio Natural SESC Pantanal foram estudadas quanto à composição, diversidade, riqueza, constância de ocorrência e abundância de espécies. Para
MARQUES, D. K. S., RESENDE, E. K. de
core  

Seasonal variation in the diet of Lontra longicaudis in the Paraná River basin, Argentina [PDF]

open access: yes, 2014
We studied the Neotropical otter ( Lontra longicaudis ) seasonal diet variations in the middle Paran á River valley, in central-northern Argentina, at the southern limit of its global range.
Eberhardt, María Ayelen Teresita   +4 more
core   +1 more source

An annotated checklist of freshwater copepoda (crustacea, hexanauplia) from continental Ecuador and the Galapagos archipelago [PDF]

open access: yes, 2019
An annotated checklist of the free-living freshwater Copepoda recorded in different regions in Ecuador (including the Amazon, the Andes, the coastal region, and the Galapagos Islands) is here provided.
Corgosinho P. H. C.   +6 more
core   +1 more source

Phylogeography of the piranha genera Serrasalmus and Pygocentrus: implications for the diversification of the Neotropical ichthyofauna

open access: yesMolecular Ecology, 2007
AbstractThe phylogenetic relationships within the piranhas were assessed using mitochondrial sequences with the aim of testing several hypotheses proposed to explain the origin of Neotropical diversity (palaeogeography, hydrogeology and museum hypotheses).
/Hubert, Nicolas   +5 more
openaire   +3 more sources

Length‒Weight and Length‒Length Relationships of Freshwater Fish Species Caught by Professional Fishermen in the Itaipu Reservoir, Brazil

open access: yesJournal of Applied Ichthyology, Volume 2025, Issue 1, 2025.
Length‒weight relationships (LWRs) and length‒length relationships (LLRs) were estimated for 63 and 58 freshwater fish species, respectively, captured in the Itaipu Reservoir, Paraná River Basin, Paraná State, Brazil. Sampling was carried out from March 1987 to July 2024 at 63 professional fishing sites within the reservoir’s area of influence ...
Éder André Gubiani   +7 more
wiley   +1 more source

Ecological studies on some lakes of the Amazon valley

open access: yes, 1967
Of the three types of lakes studied, clear water, white water, and brown water, the white water lakes are the only ones to have a reasonable autochtonous production of organic matter. Owing probably to the lack of mineral salts, the primary production is
Marlier, G.
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  

Isolation by distance and Pleistocene expansion of the lowland populations of the white piranha Serrasalmus rhombeus

open access: yesMolecular Ecology, 2007
AbstractThe genetic variability and distribution of Amazonian fish species have likely been influenced by major disturbance events in recent geological times. Alternatively, the great diversity of aquatic habitat in the Amazon is likely to shape ongoing gene flow and genetic diversity.
/Hubert, Nicolas   +5 more
openaire   +3 more sources

Fishers' ecological knowledge points to fishing‐induced changes in the Peruvian Amazon

open access: yesEcological Applications, Volume 34, Issue 5, July 2024.
Abstract Scientists increasingly draw on fishers' ecological knowledge (FEK) to gain a better understanding of fish biology and ecology, and inform options for fisheries management. We report on a study of FEK among fishers along the Lower Ucayali River in Peru, a region of exceptional productivity and diversity, which is also a major supplier of fish ...
David Poissant   +3 more
wiley   +1 more source

THE CONSERVATION STATE OF CHARACIDAE FISH (PISCES: CHARACIFORMES) IN AN AREA OF THE PLATA BASIN, ARGENTINA ESTADO DE CONSERVACION DE PECES CHARACIDAE (PISCES: CHARACIFORMES) EN UN AREA DE LA CUENCA DEL PLATA, ARGENTINA

open access: yesGayana, 2007
The fish conservation was quantified by means of the index SUMIN, composed by the summation of 12 outstanding variables for the species survival and/or conservation.
Marcelo A Zayas, Elly Cordiviola
doaj  

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