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SEASONAL ACTIVITY OF FEMALE BLACK FLIES (DIPTERA: SIMULIIDAE) IN PASTURES IN NORTHEASTERN SASKATCHEWAN

Published online by Cambridge University Press:  31 May 2012

P.G. Mason  and
P.M. Kusters
P.G. Mason
Affiliation:
Agriculture Canada Research Station, 107 Science Crescent, Saskatoon, Saskatchewan, Canada S7N 0X2
P.M. Kusters
Affiliation:
Agriculture Canada Research Station, 107 Science Crescent, Saskatoon, Saskatchewan, Canada S7N 0X2
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Abstract

The black fly species Simulium luggeri Nicholson and Mickel s.l., S. vittatum Zetterstedt s.l., S. venustum Say s.l., S. verecundum Stone and Jamnback s.l., and S. decorum Walker s.l. were collected in silhouette traps near Prince Albert, Sask., in 1986, and near Choiceland, Sask., from 1986 to 1988. The Prince Albert site was located between and within 2 km of the North and South branches of the Saskatchewan River and was 25 and 60 km south of the Whitefox River and Torch River systems. The Choiceland site, 60 km east of the Prince Albert site, was 15 km north of the main branch of the Saskatchewan River and 1/2 and 25 km south of the Whitefox River and Torch River, respectively. Simulium luggeri was the most abundant species collected at the Prince Albert site whereas S. luggeri, S. vittatum, and the S. venustumlverecundum complex were approximately equally abundant in trap catches near Choiceland over the entire season but in each study year a seasonal progression in peak abundance occurred. Black fly numbers in sweep net collections taken once, in the middle of the day, were weakly correlated with numbers in silhouette trap collections taken during an entire day.

Résumé

Les espèces de mouche noire, Simulium luggeri Nicholson et Mickel s.l., S. vittatum Zetterstedt s.l., S. venustum Say s.l., S. verecundum Stone et Jamnback s.l. et S. decorum Walker s.l. ont été recueillies aux pièges-silhouettes près de Prince Albert, Saskatchewan, en 1986, et près de Choiceland, Saskatchewan, de 1986 à 1988. Le site de Prince Albert était sis entre les branches du sud et du nord de la Rivière la Saskatchewan en dedans de 2 km de ces branches, étant 25 et 60 km, respectivement, au sud des systèmes de la Rivière Whitefox et de la Rivière Torch. Le site de Choiceland, à 60 km à l’est de celui de Prince Albert, a été sis à 15 km au nord de la branche principale de la Rivière la Saskatchewan et à 0,5 et 25 km, respectivement, au sud de la Rivière Whitefox et la Rivière Torch. Simulium luggeri a été l’espèce la plus importante recueillie au site de Prince Albert, tandis que les espèces S. luggeri, S. vittatum et le complexe S. venustumlverecundum ont été approximativement d’importance égale dans les pièges près de Choiceland pendant la saison entière, malgré qu’une progression saisonnière s’est produite pendant chaque année d’étude. Le nombre de mouches noires pris à la seine une fois par jour, à midi, ont été en faible corrélation avec le nombre pris aux pièges-silhouettes pendant une journée entière.

Type
Articles
Information
The Canadian Entomologist , Volume 122 , Issue 5 , October 1990 , pp. 825 - 835
Copyright
Copyright © Entomological Society of Canada 1990

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