Assessment of burbot Lota lota (L. 1758) population sustainability in central European reservoirs
| Autor: | Michaela Holubová, Tomáš Jůza, Lukáš Vejřík, Petr Blabolil, Josef Matěna, Jiří Peterka, Jindřich Duras, Milan Říha, Luboš Kočvara, Milan Muška |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
education.field_of_study biology Trawling 010604 marine biology & hydrobiology Population Aquatic Science Gadidae biology.organism_classification 010603 evolutionary biology 01 natural sciences Fishery Stocking Habitat Electrofishing Littoral zone Fisheries management education human activities Ecology Evolution Behavior and Systematics |
| Zdroj: | Journal of Fish Biology. 92:1545-1559 |
| ISSN: | 0022-1112 |
| Popis: | A novel sampling scheme, using a combination of electrofishing, visual exploration by scuba divers, two types of fyke nets and longlines, was tested in four reservoirs (including their inlets and outlets) to monitor a population of burbot Lota lota. This was supplemented by fry trawling and vertical hydro-acoustics, to detect L. lota larvae in two deep reservoirs that have had a long-term stocking programme. The majority of the L. lota detected were juveniles, captured by electrofishing in the littoral zones of the reservoirs and in running waters. Older individuals were rarely captured with longlines or fyke nets in deeper zones or structured habitats within the reservoirs. A combination of multiple sampling methods provided an assessment of the whole population. Population establishment could not be demonstrated as the age structure of the sampled fish corresponded with that of the stocked fish. Low post-stocking survival, migratory behaviour, interactions with other species and warmer water temperatures are considered the potential drivers for unsuccessful establishment of L. lota populations in these reservoirs. |
| Databáze: | OpenAIRE |
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