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AGE, FECUNDITY, WEIGHT, AND THE INTRINSIC RATE OF INCREASE OF THE LUPINE APHID MACROSIPHUM ALBIFRONS (HOMOPTERA: APHIDIDAE)

  • B. D. Frazer (a1) and B. Gill (a1)
Abstract

The fecundity, survivorship, and rate of development of the lupine aphid Macrosiphum albifrons Essig were determined and summarized into life tables from which the intrinsic rate of increase was computed. The life tables, using a time scale in days, were converted to a variable life table model using a physiological time scale based on an estimated thermal threshold of development of 3.59° (± 0.587°). A method of determining age and fecundity of adult aphids was developed from weight and embryo content. The use of intrinsic rate of increase and of the method of aging in field population dynamics are discussed.

La fécondité, la longévité et le taux de croissance du puceron du lupin Macrosiphum albifrons Essig ont été déterminés et résumés en tableaux de cycle biologique à partir desquels on a calculé le taux intrinsèque de multiplication. Les tableaux qui utilisent une échelle de temps en jours ont été convertis en un modèle de cycle biologique variable au moyen d’une échelle physiologique basée sur le seuil thermique estimatif de développement de 3,59° (± 0,587°). On a mis au point une méthode de détermination de l’âge et de la fécondité des pucerons adultes à partir du poids et du contenu de l’embryon. L’auteur examine l’utilisation du taux intrinsèque de multiplication et de la méthode de détermination de l’âge dans une perspective de dynamique des populations.

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The Canadian Entomologist
  • ISSN: 0008-347X
  • EISSN: 1918-3240
  • URL: /core/journals/canadian-entomologist
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