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0+ fish assemblages in a sector of the Rhône River influenced by the Bregniér-Cordon hydroelectric scheme

Regulated rivers, 1995-08, Vol.10 (2-4), p.363-372

1995 INIST-CNRS ;ISSN: 0886-9375 ;EISSN: 1099-1646

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  • Title:
    0+ fish assemblages in a sector of the Rhône River influenced by the Bregniér-Cordon hydroelectric scheme
  • Author: PENAZ, M ; JURAJDA, P ; ROUX, A. L ; OLIVIER, J. M
  • Subjects: Animal, plant and microbial ecology ; Applied ecology ; Biological and medical sciences ; Conservation, protection and management of environment and wildlife ; Environmental degradation: ecosystems survey and restoration ; Freshwater ; Fundamental and applied biological sciences. Psychology ; Pisces
  • Is Part Of: Regulated rivers, 1995-08, Vol.10 (2-4), p.363-372
  • Description: A survey was undertaken to assess the effects of the construction of the Bregnier-Cordon hydroelectric power station in 1984 on the spawning and nursery habitats of the young of the year fish (YOY) in the River Rhone floodplain area. No obvious effect could be identified in the most important aquatic habitats studied, possibly due to the downstream drift and dispersion of juvenile fish. Some new habitats were created with a high production capacity, which proved suitable as nursery areas for YOY rheophilous fishes (e.g. riparian zones of the headrace canal and reservoir). The conditions for young fish were also improved in the section of the main channel, now by-passed, in which the discharge is stabilized and sufficiently high. However, a rapid decline in the abundance and species diversity of YOY fish assemblages was noted in parapotamic side-arms, caused by the side-arms drying up and becoming invaded by terrestrial plants. High YOY abundance, indicating good reproductive success, was nevertheless noted in some fishes considered as sensitive to such hydroengineering activities.
  • Publisher: Chichester: Wiley
  • Language: English
  • Identifier: ISSN: 0886-9375
    EISSN: 1099-1646
  • Source: Alma/SFX Local Collection
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