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VARIATION AMONG INDIVIDUALS AND THE EFFECT OF TEMPERATURE ON FOOD CONSUMPTION AND REPRODUCTION IN THE COCKROACH, PERIPLANETA AMERICANA (ORTHOPTERA: BLATTIDAE)

Published online by Cambridge University Press:  31 May 2012

C. David Rollo  and
Marvin W. Gunderman
C. David Rollo
Affiliation:
Department of Biology, McMaster University, Hamilton, Ontario L8S 4L8
Marvin W. Gunderman
Affiliation:
Department of Biology, McMaster University, Hamilton, Ontario L8S 4L8
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Abstract

Long term daily feeding in individual adult males and females of Periplaneta americana (L.) was quantified using a standardized diet. There was considerable variation among days, probably related to digestive processes with a period greater than 1 day. Female feeding was correlated with the reproductive cycle, most feeding occurring during the first few days after depositing an oötheca. Females differed with respect to the length of their reproductive cycles, and the amount of food that was accumulated prior to producing an oötheca. Females with high feeding rates produced oöthecae at a faster rate, but they were less efficient at converting food into oöthecal biomass than females that ate more slowly. A decrease in temperature from 25 °C to 20 °C more than doubled the length of the reproductive cycle, but the amount of food accumulated during inter-ovipositional intervals and the size of the oöthecae were not affected.

Résumé

L'activité alimentaire journalière à long terme d'individus mâles et femelles de Periplaneta americana (L.) a été quantifiée en utilisant un régime standard. Une grande variation entre jours a été observée, probablement en relation avec les processus digestifs ayant une périodicité plus grande qu'un jour. L'alimentation des femelles était corrélée au cycle reproducteur, la prise maximale étant enregistrée au cours des quelques jours suivant la déposition d'une ovothèque. Les femelles se sont montrées différentes quant à la longueur de leurs cycles reproducteurs et à la quantité de nourriture prise avant la production d'une ovothèque. Les femelles montrant une prise de nourriture élevée ont produit des ovothèques plus fréquemment, mais elles étaient moins efficaces à convertir leur nourriture en biomass d'ovothèque que les femelles consommant plus lentement. Une baisse de température de 25 °à 20 °C a plus que doublé la durée du cycle reproducteur, mais la quantité de nourriture accumulée au cours des intervalles inter-pontes et la taille des ovothèques n'ont pas été affectées.

Type
Articles
Information
The Canadian Entomologist , Volume 116 , Issue 6 , June 1984 , pp. 785 - 793
Copyright
Copyright © Entomological Society of Canada 1984

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