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THE BIOLOGY OF SIMULIUM ARCTICUM MALLOCH IN ALBERTA. PART I. OBLIGATE ANAUTOGENY IN S. ARCTICUM AND OTHER BLACK FLIES (DIPTERA: SIMULIIDAE)

Published online by Cambridge University Press:  31 May 2012

J.R. Anderson  and
J.A. Shemanchuk
J.R. Anderson
Affiliation:
Division of Entomology and Parasitology, University of California, Berkeley, California, USA9472
J.A. Shemanchuk
Affiliation:
Agriculture Canada Research Station, Lthbridge, Alberta, Canada T1J 4B1
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Abstract

The primary follicles of all 291 laboratory-reared Simulium arcticum Malloch females provided with only sucrose and water did not develop beyond stage II. This was true for flies derived from field-collected eggs, larvae, or pupae, and for laboratory-reared larvae that received either standard, concentrated, or unsupplemented river water diets. Conversely, all 59 females that digested a meal of cattle blood had follicles at stage IV by 85 h and stage V (mature eggs) by 109 h post-engorgement. Simulium arcticum populations from the Athabasca and Crowsnest River were thus characterized by obligate anautogeny and gonotrophic concordance. Most non-blood-fed females were dissected and examined when 4–19 days old. The presence or absence of a meconium, quantity of fat body, and other internal features were compared in young and old non-blood-fed females.

Résumé

Les follicules primaires des 291 femelles de Simulium arcticum Malloch élevées en laboratoire et nourries seulement de sucrose et d’eau ne se sont pas développées au-delà du stade II. Le même résultat s’applique aux mouches issues d’oeufs, de larves ou de pupes recueillis sur le terrain, ainsi qu’aux larves élevées en laboratoire et qui ont reçu des rations courantes, concentrées ou à base d’eau de rivière no complétées. Inversement, les 59 femelles qui ont digéré un repas de sang de bovins présentaient des follicules au stade IV au bout de 85 h et au stade V (oeufs matures) 109 h après l’ingestion. Les populations de Simulium arcticum provenant de la rivière Athabasca et Crowsnest sont donc caractérisées par anautogénie et concordance gonotrophique. La plupart des femelles non nourries de sang ont été dissiquées et examinées à l’âge de 4 à 19 jours. La présence ou l’absence d’un méconium, la teneur en gras corporel et d’autres caractéristiques ont été comparées chez des femelles jeunes et âgées non nourries de sang.

Type
Articles
Information
The Canadian Entomologist , Volume 119 , Issue 1 , January 1987 , pp. 21 - 27
Copyright
Copyright © Entomological Society of Canada 1987

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