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EFFECT OF TRAP SITE, TIME OF DAY, AND METEOROLOGICAL FACTORS ON ABUNDANCE OF HOST-SEEKING MAMMALOPHILIC BLACK FLIES (DIPTERA: SIMULIIDAE)

Published online by Cambridge University Press:  31 May 2012

Francis R. Martin ,
J.W. McCreadie  and
M.H. Colbo
Francis R. Martin
Affiliation:
Department of Biology, Memorial University, St. John's, Newfoundland, Canada A1B 3X9
J.W. McCreadie
Affiliation:
Department of Biology, Memorial University, St. John's, Newfoundland, Canada A1B 3X9
M.H. Colbo
Affiliation:
Department of Biology, Memorial University, St. John's, Newfoundland, Canada A1B 3X9
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Abstract

Sweep-net and sticky-trap data were used to examine the influence of time of day (morning, afternoon, evening), trapping location (pasture, bog, fen, regrowth, and mature forest), and meteorological factors (wind, temperature, saturation deficit, and light) on adult female fly catch for three species (species complex) of black flies — Simulium truncatum/venustum complex, Prosimulium mixtum, and Stegopterna mutata (triploid). Wind speed, light, temperature, saturation deficit, and time of day were all shown to have a significant effect on mean catch, although effects varied among species. After accounting for weather and time, trap location was shown to have a significant effect on mean catch. The effect of site on the mean fly catch of S. truncatum/venustum complex varied with season (June to July), which may have resulted from a seasonal shift in sibling-species composition. Mean catches of P. mixtum and St. mutata were lowest in traps located in open habitats.

Résumé

Des données obtenues par battage de la végétation avec un filet et par l’installation de pièges collants ont servi à examiner l’influence de l’heure (matin, après-midi ou soir), de l’endroit (pâturage, tourbière ombrotrophe, tourbière minérotrophe, forêt en croissance secondaire, forêt à maturité) et des facteurs météorologiques (vent, température, déficit hygrométrique, lumière) sur les captures de femelles adultes de trois espèces (complexes d’espèces) de simulies — complexe Simulium truncatum/venustum, Prosimulium mixtum et Stegopterna mutata (triploïde). La vitesse du vent, la lumière, la température, le déficit hygrométrique et l’heure ont tous un effet significatif sur le nombre moyen de mouches noires capturées, mais les effets sont variables selon les espèces. Après avoir apporté les corrections nécessaires pour tenir compte de l’heure et des facteurs météorologiques, il a été possible de montrer que la situation du piège a un effet significatif sur la valeur moyenne des captures. L’effet de l’endroit sur le nombre moyen d’individus capturés dans le cas du complexe S. truncatum/venustum varie en fonction de la saison (juin et juillet), peut-être à cause de variations saisonnières dans la composition de la communauté d’espèces soeurs. Les nombres moyens de captures de P. mixtum et de St. mutata se sont avérés moins élevés dans les pièges situés dans les endroits dégagés.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 126 , Issue 2 , April 1994 , pp. 283 - 289
Copyright
Copyright © Entomological Society of Canada 1994

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