Structure et fonctionnement des ecosystèmes du Haut-Rhône français. 25. Premières observations sur les populations piscicoles dans le secteur de Brégnier-Cordon

Nelva, A.; Pattée, E.; Perrin, J. F.; Persat, H.; Roux, A. Le

doi:10.1080/03680770.1980.11897172

Cited by 2 publications

(3 citation statements)

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“…This approach was modified for study of the adult fish populations of the Upper Rhone (Nelva et al, 1979(Nelva et al, , 1981Persat etal., 1985); they took many small sampling points at regular intervals within a given area and recorded numerous qualitative environmental variables at each point. This strategy, "Point Abundance Sampling", resulted in a large data bank (Rousseau etal., 1985) from which they evaluated the relative abundance of adult fishes as well as the effects of habitat modification on ecological diversity.…”

Section: Sampling Strategymentioning

confidence: 99%

“…Antipa, 1928;Balon, 1966;Guillory, 1979;Nelva et al, 1981;Beecher & Fernau, 1982;Holcik, 1987), investigations of larval and 0+ juvenile populations are much scarcer (e.g. Lange & Dmitriyeva, 1973;Carrel, 1986;Holland, 1986;Sheaffer & Nickum, 1986) and most have dealt with tropical or sub-tropical regions (for a review, see Welcomme, 1985).…”

Section: Introductionmentioning

confidence: 99%

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Ecology of fish spawning and nursery zones in the flood plain, using a new sampling approach

Copp

Peňáz²

1988

Hydrobiologia

151

106

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Horizontal zonation of fish reproduction, a lotic-to-lentic succession similar to that seen with increasing stream order, was evident from the relative abundance of larval and 0 + juvenile fishes in three floodplain spawning and nursery areas (lotic, semi-lotic, lentic) of the Upper Rhone River, France. Although the lotic and lentic ecosystems provided similar estimates of standing crop (0 + juveniles), differences were apparent in the reproductive and trophic guild structure of the YOY taxocoenoses at the three sites. A new sampling approach (Random Point-Abundance Sampling and modified electrofishing) is described for early-life fish ecology. The electrofishing method employed is mobile, effective for all sizes of larvae and 0 + juveniles of most species, quantitative, and applicable to a number of freshwater situations; and the punctual data resulting from this sampling approach are comparable both spatially and temporally.

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Section: Sampling Strategymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ecology of fish spawning and nursery zones in the flood plain, using a new sampling approach

Copp

Peňáz²

1988

Hydrobiologia

151

106

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“…The essential thesis of this work is that most rivers consist of a channelfloodplain complex, where the two components are intimately interrelated and linked by the annual cycle of flood and recession. This was expressed by Junk et al (1989) as the flood pulse concept, which added a lateral component to the generally longitudinal interpretations of the river continuum concept (Vannote et af., 1980) or the concept of river spiralling (Newbold et al, 1981). Many of the conclusions as to the significance of the floodplain in temperate regions have yet to be validated, although studies from the Danube (Holcik and Bastl, 1976), Rhone (Amoros et al, 1982) and Mississippi (Bryan and Sabins, 1979;, among others, indicate that very similar processes occur in pristine temperate rivers as in tropical systems.…”

Section: Introductionmentioning

confidence: 99%

Relationships between fisheries and the integrity of river systems

Welcomme¹

1995

Regul. Rivers: Res. Mgmt.

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Human use of river systems has intensified considerably in the last century due to increasing population and the associated higher demand for water through industrial and agricultural technologies. This intensification process has impacted rivers and resident organisms. Natural rivers have rich and varied fish faunas adapted to the variable climate and morphology of such systems. Much of the diversity and resilience can be traced to the connectivity between two very different components, the channel and the floodplain. Fisheries in rivers are as diverse as the fish communities and are adjusted for capturing most species and life stages throughout the year. Fisheries reasonably conducted have proved sustainable with a high rate of catch correlated with the intensity of flooding in the same or preceding years. Fish communities react in a predictable manner to externally imposed stresses, whether eutrophication, induced by humans or natural environmental modification, or fishing, through successive loss of large species and their replacement by smaller, faster growing species. Generally, the overall weight of catch remains little affected by this process until excessive levels of exploitation are reached and the stock collapses. Damage to fish communities through overfishing and environmental modification is widespread. Improvement of the situation demands stricter management of riverine systems through the protection of the few that remain in a relatively pristine state, and those modified should be restored if social, political and economic conditions allow. Should this not be possible, approaches to the mitigation of externally imposed stresses should be sought and applied.

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Structure et fonctionnement des ecosystèmes du Haut-Rhône français. 25. Premières observations sur les populations piscicoles dans le secteur de Brégnier-Cordon

Cited by 2 publications

References 1 publication

Ecology of fish spawning and nursery zones in the flood plain, using a new sampling approach

Ecology of fish spawning and nursery zones in the flood plain, using a new sampling approach

Relationships between fisheries and the integrity of river systems

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