Diel changeover of fish assemblages in shallow sandy habitats of lowland rivers of different sizes

Diel dynamics of species richness and fish abundance were studied in three lowland rivers that differed significantly in size (discharge) in to the upper Vistula River drainage system (Poland). Shallow sandy habitats at point bars were repeatedly sampled with beach seining over 24-h periods. Species richness peaked at dusk and then decreased throughout the 24-h period in all the rivers. Overall fish abundance changed similarly in the smallest and the largest river, whereas in the mid-sized river it increased in the late afternoon hours. Some species (three gudgeon species, golden loach, and chub) were persistently nocturnal, whereas others (dace, bleak, and roach) shifted to diurnal activity in the mid-sized and large rivers. These differences in diel changes in the abundance of certain species might be explained in the context of variation in availability (i.e., proximity) of other, more heterogeneous habitats.

Auteurs du document :

Michał Nowak, Artur Klaczak, Ján Koščo, Paweł Szczerbik, Jakub Fedorčák, Juraj Hajdú, Włodzimierz Popek

Obtenir le document :

EDP Sciences

Mots clés :

24-h cycle, lotic ecosystems, sandbars, riverine fishes, spatio-temporal variation, Cycle de 24 heures, écosystèmes lotiques, habitat sableux, poissons de rivière, variation spatio-temporelle

Thème (issu du Text Mining) :

MILIEU NATUREL, FAUNE

Date :

2019-10-18

Format :

text/xml

Source :

https://doi.org/10.1051/kmae/2019037

Langue :

Anglais

Télécharger les documents :

https://www.kmae-journal.org/10.1051/kmae/2019037/pdf

Permalien :

https://www.documentation.eauetbiodiversite.fr/notice/diel-changeover-of-fish-assemblages-in-shallow-sandy-habitats-of-lowland-rivers-of-different-sizes0

Evaluer cette notice:

Imprimer