Characterization of the typical fish community of inland waterways of the north‐eastern lowlands in Germany
Identifieur interne : 001009 ( Main/Exploration ); précédent : 001008; suivant : 001010Characterization of the typical fish community of inland waterways of the north‐eastern lowlands in Germany
Auteurs : Christian Wolter (biologiste) [Allemagne] ; Andreas Vilcinskas [Allemagne]Source :
- Regulated Rivers: Research & Management [ 0886-9375 ] ; 1997-07.
English descriptors
Abstract
A representative number of 11 inland waterways of the north‐eastern lowlands in Germany was surveyed between 1992 and 1994 using different fishing methods. Data were pooled for sites and waterways. From the 234 sites investigated, a total of 53 432 fish were collected and 29 species recorded. The typical fish assemblage of the waterways was subdivided into three defined classes according to presence and relative abundance of species: reference, accompanying and minor species. The fish fauna was characterized by the dominance of roach (Rutilus rutilus) and perch (Perca fluviatilis). Both fish species showed a mean abundance of 70·61 % (SD=10·91 %), whereas more than half of the species recorded had a relative abundance < 1%. Two trends could be identified in the fish assemblage owing to human influences: an increase in the dominance of roach and perch and a decrease in species number. In particular, intolerant fish with a preference for sand or gravel substrata and current diversity have become rare and endangered. The typical fish assemblage of waterways in the lowlands differed from that in the uplands with respect to the higher abundance of rheophilic lithophils in the uplands. © 1997 John Wiley & Sons, Ltd.
Url:
DOI: 10.1002/(SICI)1099-1646(199707)13:4<335::AID-RRR443>3.0.CO;2-G
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