Results 61 to 70 of about 1,365 (216)

Trophic ecology and condition factor of two sympatric species of Hemigrammus from a stream of the Negro River Basin, Brazilian Amazon

open access: yesBrazilian Journal of Biology
This study aimed to evaluate the diet and condition factor of Hemigrammus levis and Hemigrammus coeruleus in a stream in the Tupé Sustainable Development Reserve, in the lower Negro River region, and contribute information on the biology of small species
M. Garrido, C. Lubich, K. C. Yamamoto
doaj   +1 more source

A new Hyphessobrycon (Characiformes: Acestrorhamphidae) from the Central Amazon basin, Brazil [PDF]

open access: yesPapéis Avulsos de Zoologia
A new species of Hyphessobrycon is described from the region of the lower rioTapajós basin, state ofPará, and tributaries of the northern bank of the Amazon River from the rio Itapiranga basin westward to the lower rio Negro basin, states of Amazonas and
Flávio C.T. Lima   +3 more
doaj   +1 more source

A phylogenetic analysis of Brycon and Henochilus (Characiformes, Characidae, Bryconinae) based on the mitochondrial gene 16S rRNA [PDF]

open access: yes, 2008
The genus Brycon, the largest subunit of the Bryconinae, has 42 valid species distributed from southern Mexico to the La Plata River in Argentina. Henochilus is a monotypic genus, comprising a single species (H.
HILSDORF, Silva   +3 more
core   +2 more sources

Meta‐analysis contrasting freshwater biodiversity in forests and oil palm plantations with and without riparian buffers

open access: yesConservation Biology, Volume 38, Issue 1, February 2024.
Abstract The expansion of oil palm plantations has led to land‐use change and deforestation in the tropics, which has affected biodiversity. Although the impacts of the crop on terrestrial biodiversity have been extensively reviewed, its effects on freshwater biodiversity remain relatively unexplored.
Oscar Alberto Rojas‐Castillo   +10 more
wiley   +1 more source

EVOLUCIÓN DE LA INTEGRIDAD ESTRUCTURAL DE ECOSISTEMAS LÓTICOS DEL PIEDEMONTE LLANERO FRENTE A LA INTERVENCIÓN ANTRÓPICA

open access: yesActa Biológica Colombiana, 2015
Entre los años 1993 y 2007 se determinó la evolución de la integridad ecológica de dos corrientes del piedemonte llanero del Meta, los caños Mateguadua y Caibe en proximidades a los municipios de Restrepo y Cumaral.
Guillermo Aramando Briceño Vanegas
doaj   +1 more source

Length–weight relations of fishes (Actinopterygii) from karst streams in the Bodoquena Plateau, western Brazil [PDF]

open access: yesActa Ichthyologica et Piscatoria, 2018
The presently reported study provides the length–weight relations (LWR) for 23 species from headwater streams of the Bodoquena Plateau, which is located on the southern border of the Brazilian Pantanal.
F. Severo-Neto   +4 more
doaj   +3 more sources

Bibliografía de los peces de agua dulce de Argentina y Uruguay : Suplemento 1982 [PDF]

open access: yes, 1982
Fil: López, Hugo Luis. División Zoología Vertebrados, Museo de La Plata, UNLPFil: Menni, Roberto Carlos. División Zoología Vertebrados, Museo de La Plata, UNLPFil: Ringuelet, Raúl Adolfo. Instituto de Limnología Dr. Raúl A. Ringuelet (ILPLA); Facultad de
López, Hugo Luis   +2 more
core  

Assessing fish diversity in abandoned mining ponds in Madre de Dios, Peru, using environmental DNA

open access: yesEnvironmental DNA, Volume 6, Issue 1, January–February 2024.
We surveyed four lentic systems in Madre de Dios, Peru: two abandoned mining ponds created by ASGM and two unmined oxbow lakes as a reference to assess fish recolonization. We compared two alternative eDNA processing methods and contrasted our results with historic data from traditional biodiversity monitoring. Our results indicate that eDNA could be a
Camila Timana‐Mendoza   +4 more
wiley   +1 more source

Synchronization and collective swimming patterns in fish (Hemigrammus bleheri) [PDF]

open access: yesJournal of The Royal Society Interface, 2016
In this work, we address the case of red nose tetra fishHemigrammus bleheriswimming in groups in a uniform flow, giving special attention to the basic interactions and cooperative swimming of a single pair of fish. We first bring evidence of synchronization of the two fish, where the swimming modes are dominated by ‘out-phase’ and ‘in-phase ...
Ashraf, I.   +4 more
openaire   +3 more sources

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