Bibliothèque Électronique Lac Saint-Pierre

Effects of Water Flow Fluctuations on Seasonal Migration Patterns of Fish Species in the St. Lawrence River

Marchand, F. et de Lafontaine, Y. (2002). Effects of Water Flow Fluctuations on Seasonal Migration Patterns of Fish Species in the St. Lawrence River. [Publication gouvernementale]

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Marchand et al_2002_fish communities_water flow_St Lawrence river_A.pdf

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Résumé

Fish communities are often used as indicators of environmental quality and integrity in large river ecosystems (Karr 1981; Fausch et al. 1990). Changes in the structure and behavior of the fish community, such as abundance, diversity or timing in migration, can reflect the effect of various stressors on the biotic integrity of the river as a whole (Fausch et al. 1990). Because of their long life cycle (i.e. ? 3 years), most fish species are considered good indicators of effects integrated over long term and because of their high mobility, some (i.e. diadromous fish) represent good indicators of short term effects in large rivers. Flow regime is one of the main factors used in linear statistic models to predict fish diversity in large rivers (Oberdorff et al. 1995). Flow regimes in large rivers have also been related to variation in fish annual abundance (Scarnecchia 1981; Armor and Herrgessell 1985). Water flow has been identified as an important factor influencing the timing and the intensity of many fish species migration (Jonsson 1991; Quinn et al. 1997). However, most of these studies investigating the possible relationships between flow regimes and fish abundance, diversity or migration timing, have been done on very short time scale (< 5 years) and/or on river ecosystem relatively smaller than the St.Lawrence river.

Type de document: Publication gouvernementale
Éditeur: Environment Canada
Lieu de publication: Montréal, Québec
Statut du texte intégral: Public
Mots-clés libres: Fish communities, Water flow, St. Lawrence river, Environmental quality and integrity, Large river ecosystems, Abundance, Migration, Fish diversity
Sujets: 2. Milieu physique > 2.4. Hydrologie
4. Faune > 4.2. Poisson
Date de dépôt: 15 août 2016 20:27
Dernière modification: 07 nov. 2016 02:00
URI: http://belsp.uqtr.ca/id/eprint/393

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