Results 61 to 70 of about 19,982,393 (193)

Evaluating and modeling pacu (Piaractus mesopotamicus) growth in intensive floating cage culture: A nonlinear approach for lotic freshwater systems [PDF]

open access: yesAnais da Academia Brasileira de Ciências
Pacu (Piaractus mesopotamicus) is traditionally farmed in ponds, but floating cages (intensive productive systems) are gaining momentum. This study evaluated the growth performance of P.
EXEQUIEL OSCAR FURLAN   +6 more
doaj   +2 more sources

Examining uncertainty in environmental DNA analyses in freshwater lotic systems

open access: yes, 2022
The use of environmental DNA (eDNA) to quantify aquatic biodiversity is a rapidly emerging technique used for academic, government, and private purposes. The ease and relative low costs of taking environmental samples versus other methods of sampling makes eDNA methods an attractive choice, however, the broad variability in natural environments and a ...
openaire   +1 more source

MACROPHYTE STRUCTURE IN LOTIC-LENTIC HABITATS FROM BRAZILIAN PANTANAL [PDF]

open access: yes, 2017
 The goal of this study was to compare the vegetation structure of macrophytes in an anabranch-lake system. Sampling was carried out at flood in three types of aquatic vegetation, (wild-rice, floating meadow and Polygonumbank) in anabranch Bonfim (lotic)
de Carvalho, Fábia Silva   +8 more
core  

Diatoms from lentic and lotic systems in Antioquia, Chocó and Santander Departments in Colombia

open access: yesRevista de Biología Tropical, 2007
En las regiones tropicales y subtropicales, existe un gran número de especies que aún no han sido descritas. La alta posibilidad de extinción hace que su inventario sea una prioridad. En este trabajo, se analizan 23 taxones de diatomeas de sistemas lóticos andinos y cuerpos de agua lénticos localizados en los departamentos de Antioquia, Santander y ...
Sara López Salas   +2 more
openaire   +5 more sources

Site Fidelity, Depth Preference and Vertical Movement Patterns of Lentic and Lotic European Catfish Silurus glanis

open access: yes
To study variables that may trigger the dispersion of the currently expanding European catfish in its native distribution limits, 42 individuals were captured from Upper Lake Constance (lentic) and 42 from two streaming tributaries (lotic), fitted with ...
Ros, Albert;Baer, Jan;Fromherz, Matthias;Geist, Juergen;Brinker, Alexander
core   +1 more source

Seasonal variation of the phytoplankton community structure in the São João River, Iguaçu National Park, Brazil Variação sazonal da estrutura da comunidade fitoplanctônica no Rio São João, Parque Nacional do Iguaçu, Brasil

open access: yesBrazilian Journal of Biology, 2013
The limnological characteristics and the phytoplankton community of the pelagic region of the São João River, tributary of the Iguaçu River, Iguaçu National Park were analyzed from August 2008 to July 2009.
JC. Bortolini, NC. Bueno
doaj  

Evaluation of phytoplankton and water quality of a subtropical stream in the Northwest of Argentina

open access: yesBonplandia, 2018
The Calimayo stream is part of the Salí river basin, the main fluvial network in the region. This lotic system was recognized for its great biodiversity.
María de Los Ángeles Taboada   +4 more
doaj   +1 more source

Reciprocal Averaging and Polar Ordination as Techniques for Analyzing Lotic Macroinvertebrate Communities

open access: yes, 1980
Reciprocal averaging and polar ordination techniques were applied to lotic macroinvertebrate field data to determine the relative performance of these techniques in lotic benthic community analyses.
Ronald W. Davies, Joseph M. Culp
core   +1 more source

Turbidity curtain - a sustainable structure for mining waste dump drainage systems [PDF]

open access: yesE3S Web of Conferences
The construction of waste dumps is an inherent part of the mining industry. They are built gradually and depend on the progress of mining, which limits the speed of construction and delays their decommissioning.
Macedo Luiz   +2 more
doaj   +1 more source

Spatial and temporal heterogeneity in lotic systems : implications for defining reference conditions for macroinvertebrates

open access: yes, 2001
Bibliography: leaves 195-210.Spatial and temporal heterogeneity of lotic systems was examined by assessing variability in macroinbertebrate assemblages in two geographic regions, the Western Cape and Mpumalanga, in South Africa. Assemblages were assessed
Dallas, Helen Fiona
core   +1 more source

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