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THE LENTIC STONEFLIES (PLECOPTERA) FROM THE CONTINENTAL DIVIDE REGION OF SOUTHWESTERN CANADA

Published online by Cambridge University Press:  31 May 2012

D. B. Donald
Affiliation:
Canadian Wildlife Service, Edmonton, Alberta T5K 2J5
R. S. Anderson
Affiliation:
Canadian Wildlife Service, Edmonton, Alberta T5K 2J5

Abstract

Seventeen species of Plecoptera were collected from 58 lakes situated along the Continental Divide in southwestern Canada. Four of the 17 species were found once. The commonest species was present in 25 lakes. At low to middle elevations stoneflies occurred in large lakes that had relatively low total dissolved solids and low maximum annual heat content. The distribution of the majority of species was restricted with respect to lake area and elevation. For example, some species were found only in large lakes at low to medium elevation (900 to 1700 m), while others were found only in small lakes at high elevation (1800 to 2400 m).

Résumé

Dix-sept espcès de Plécoptères ont été recencées dans 58 lacs situés le long de la ligne de démarcation du continent dans le sud-ouest du Canada. Quatre des 17 espèces ont été relevées une fois. L’espèce la plus commune a été relevée dans 25 lacs. Pour les élévations faibles à moyennes, les plécoptères se retrouvaient dans de grands lacs dont les solides totaux en solution et le contenu calorique annuel maximum étaient faibles. La distribution de la majorité des espèces était limitée en fonction de la surface et de l’élévation des lacs. Par example, certaines espèces ont été trouvées uniquement dans de grands lacs d’élévation faible à moyenne (900 à 1700 m), alors que d’autres ont été trouvées seulement dans de petits lacs d’altitude élevée (1800 à 2400 m).

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1980

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