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The gain of additional sampling methods for the fish-based assessment of large rivers.pdf 967,53KB
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1000 Titel
  • The gain of additional sampling methods for the fish-based assessment of large rivers
1000 Autor/in
  1. Zajicek, Petr |
  2. Wolter, Christian |
1000 Erscheinungsjahr 2017
1000 LeibnizOpen
1000 Publikationstyp
  1. Artikel |
1000 Online veröffentlicht
  • 2017-09-29
1000 Erschienen in
1000 Quellenangabe
  • 197:15-24
1000 FRL-Sammlung
1000 Copyrightjahr
  • 2018
1000 Embargo
  • 2019-09-29
1000 Lizenz
1000 Verlagsversion
  • https://doi.org/10.1016/j.fishres.2017.09.018 |
1000 Ergänzendes Material
  • https://www.sciencedirect.com/science/article/pii/S0165783617302667?via%3Dihub#sec0065 |
1000 Publikationsstatus
1000 Begutachtungsstatus
1000 Sprache der Publikation
1000 Abstract/Summary
  • Fishes serve as indicators in ecological assessments of European large rivers. Electrofishing is the standard fishing method although it is restricted to the shallow littoral shoreline. Fish occurring in the open water zone of the main channel remain consequently underestimated. Additional sampling methods that cover the mid-channel of rivers could close the electrofishing-gap, but strengths’, weaknesses and gains of both electrofishing and additional sampling methods for fish-based assessments of large rivers have not been contrasted yet. We analyzed a unique dataset consisting of 2693 fish samplings in European large rivers and compared electrofishing with the additional sampling methods trawling, seining, and drift-netting. We compiled fish metrics commonly used in fish-based assessments yielded by the different gears and highlight the differences in fish species, biodiversity metrics (Shannon Index, Evenness, Simpson Index), the Fish Region Index (FRI) and densities of fish in selected guilds (eurytopic, rheophilic, lithophilic, phytophilic, psammophilic, potamal) that are considered indicative for the degradation of habitats in large rivers. Electrofishing yielded overall highest numbers of species, biodiversity metrics and densities of fish guilds, except for the number of migratory and Habitat Directive species, the FRI and densities of potamal fish. The additional gears, predominantly trawling, captured additional rheophilic and lithophilic species. Trawling also assessed most migratory and Habitat Directive species and yielded higher densities of potamal fish as well as larger fish than electrofishing. Trawl catches further estimated higher biodiversity compared to seining, while the latter yielded higher densities of eurytopic, rheophilic, lithophilic and phytophilic fish. Drift-netting yielded the lowest estimates overall but sample size was very low. We suggest that electrofishing is an appropriate method to assess and evaluate the effects of hydromorphological degradation and rehabilitation on fish, and to guide river management. It sufficiently well represents the typical fish assemblage of large rivers despite its restriction to the shoreline. In contrast, assessing specifically Habitat Directive, migratory and rare species, as well as obtaining complete species inventories, e.g., for biodiversity assessments, requires complementary sampling of the mid-channel of large rivers by additional gears such as trawling.
1000 Sacherschließung
lokal Seine
lokal Fishing gear comparison
lokal Drift-net
lokal Electrofishing
lokal Trawl
1000 Fächerklassifikation (DDC)
1000 Liste der Beteiligten
  1. http://orcid.org/0000-0002-4523-384X|http://orcid.org/0000-0002-2819-2900
1000 Label
1000 Fördernummer
  1. 044096; 603378
1000 Förderprogramm
  1. FP6 Project EFI+ (Improvement and Spatial Extension of the European Fish Index); FP7 Project MARS (Managing Aquatic ecosystems and water Resources under multiple Stress)
1000 Dateien
  1. The gain of additional sampling methods for the fish-based assessment of large rivers
  2. Open access options - Fisheries Research
  3. Elsevier Article Sharing Policy
1000 Objektart article
1000 Beschrieben durch
1000 @id frl:6406711.rdf
1000 Erstellt am 2018-02-13T15:56:23.379+0100
1000 Erstellt von 251
1000 beschreibt frl:6406711
1000 Bearbeitet von 25
1000 Zuletzt bearbeitet 2023-01-02T10:55:42.887+0100
1000 Objekt bearb. Mon Jan 02 10:55:42 CET 2023
1000 Vgl. frl:6406711
1000 Oai Id
  1. oai:frl.publisso.de:frl:6406711 |
1000 Sichtbarkeit Metadaten public
1000 Sichtbarkeit Daten public
1000 Gegenstand von

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