Openness of fish habitat matters: Lake pelagic fish community starts very close to the shore.

0553273 - BC 2022 RIV CH eng J - Článek v odborném periodiku
Moraes, Karlos Ribeiro de - Souza, Allan T. - Vašek, Mojmír - Bartoň, Daniel - Blabolil, Petr - Čech, Martin - dos Santos, Romulo Acacio - Draštík, Vladislav - Holubová, Michaela - Jůza, Tomáš - Kočvara, Luboš - Kolářová, K. - Matěna, Josef - Peterka, Jiří - Říha, Milan - Sajdlová, Zuzana - Šmejkal, Marek - Tsering, Lobsang - Kubečka, Jan
Openness of fish habitat matters: Lake pelagic fish community starts very close to the shore.
Water. Roč. 13, č. 22 (2021), č. článku 3291. E-ISSN 2073-4441
Grant CEP: GA MZe(CZ) QK1920011; GA ČR(CZ) GA20-18005S; GA MŠMT(CZ) EF16_025/0007417
Institucionální podpora: RVO:60077344
Klíčová slova: habitat use * spatial distribution * ecotone * open water Scardinius * Rutilus * Alburnus * Perca
Obor OECD: Fishery
Impakt faktor: 3.530, rok: 2021
Způsob publikování: Open access
https://doi.org/10.3390/w13223291

Fish communities differ significantly between the littoral and the pelagic habitats. This paper attempts to define the shift in communities between the two habitats based on the European standard gillnet catch. We sampled the benthic and pelagic habitats from shore to shore in Lake Most and Rimov Reservoir (Czech Republic). The 3 m deep pelagic nets were spanned across the water body at equal distances from two boundary points, where the depth was 3.5 m. The benthic community contained more fish, more species, and smaller individuals. The mild sloped littoral with a soft bottom attracted more fish than the sloping bank with a hard bottom and less benthos and large Daphnia. The catch of the pelagic nets was dominated by eurytopic fish-rudd (Scardinius erythrophthalmus) and roach (Rutilus rutilus) in Most and bleak (Alburnus alburnus) in Rimov. With the exception of one case where overgrown macrophytes extended the structured habitat, the largest shift from the benthic to the pelagic community was observed only in the first pelagic gillnet above the bottom depth of 3.5 m. Open water catches were relatively constant with small signs of decline towards the middle of the lake. The results indicate that the benthic gillnet catch is representative of a very limited area and volume, while most of the volume is dominated by the pelagic community. This has important consequences for the assessment of the community parameters of the whole lake following the European standards for gillnet sampling design.
Trvalý link: http://hdl.handle.net/11104/0328257