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STAGE-SPECIFIC SURVIVAL OF STROBILOMYIA APPALACHENSIS (DIPTERA: ANTHOMYIIDAE)

Published online by Cambridge University Press:  31 May 2012

L.L. Fidgen ,
J.D. Sweeney  and
D.T. Quiring
L.L. Fidgen
Affiliation:
Population Ecology Group, Faculty of Forestry and Environmental Management, University of New Bmnswick, Fredericton, New Bmnswick, Canada E3B 6C2
J.D. Sweeney
Affiliation:
Canadian Forest Service, Natural Resources Canada, PO Box 4000, Fredericton, New Bmnswick, Canada E3B 5P7
D.T. Quiring
Affiliation:
Population Ecology Group, Faculty of Forestry and Environmental Management, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 6C2
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Abstract

A 2-year field study was carried out to determine densities and stage-specific survival of eggs, second- and third-instar larvae, prepupae, pupae, and adults of Strobilomyia appalachensis Michelsen in a black spruce, Picea mariana (Mill.) B.S.P. (Pinaceae), seed orchard located in New Brunswick, Canada. Trends in stage-specific survival were similar for both years. Most individuals died during the second-instar stage, we suspect mostly because of failure to establish. The lowest stage survival occurred during the prepupal and pupal stages, due primarily to predation by ground-dwelling invertebrates.

Résumé

Une étude sur le terrain d’une durée de deux ans a été effectuée afin de déterminer les densités des oeufs, des larves de deuxième et de troisième stades, des prénymphes, des nymphes et des adultes de Strobilomyia appalachensis Michelsen dans un verger à graines d’épinette noire, Picea mariana (Mill.) B.S.P. (Pinaceae) dans la province du Nouveau-Brunswick, au Canada, et leur survie à des stades particuliers. Les tendances de survie à certains stades étaient similaires pour les deux années. La plupart des sujets sont morts au cours du deuxième stade larvaire, selon nous, surtout en raison de l’incapacité à s’établir dans le cone. La survie la plus basse a été constatée au cours des stades de prénymphe et de nymphe, surtout en raison de la prédation de la part d’invertébrés terricoles.

Type
Articles
Information
The Canadian Entomologist , Volume 131 , Issue 4 , August 1999 , pp. 483 - 494
Copyright
Copyright © Entomological Society of Canada 1999

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