نتایج جستجو برای: barbel
تعداد نتایج: 194 فیلتر نتایج به سال:
Requalification of low-head ramped weirs through the addition substrates (retrofitting) has attracted attention in recent years. However, few studies are available on how this measure affects negotiation by fish. This study aimed to assess performance an experimental weir (3.00 m long with 10% slope; 0.30 head-drop) enhance passage a potamodromous cyprinid species, Iberian barbel (Luciobarbus b...
Fish-habitat associations are poorly known in offshore areas of very large rivers. We examined physical habitat structure and its effect on use assemblage formation benthic fishes the main channel Danube River, Hungary. Principal component analysis variables showed that sample unit (i.e., 500 m long reaches) cross-channel transect-level data corresponding reaches were highly correlated. found c...
Most freshwater fish need to move freely through rivers complete their life cycles. Thus, river barriers (e.g. dams, culverts and gauging stations) may delay, hinder or even block longitudinal movements, affecting conservation. The most widespread solution allow upstream migration are fishways, whereas downstream is basically facilitated spillways, turbines specific solutions such as bypass sys...
Abstract In semi-arid environments, the effects of irregularly distributed rainfall, flow regulation and water inter-basin transfer enhance spread non-native fish to detriment native communities. River Segura, since 1980s number species has progressively increased, also because building facility connecting rivers Segura Tajo. With aim highlighting how man-driven changes in diversity communities...
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