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Body size as an indicator of parasitoid quality in male and female Anagyrus kamali (Hymenoptera: Encyrtidae)

Published online by Cambridge University Press:  09 March 2007

L.A. Sagarra ,
C. Vincent  and
R.K. Stewart
L.A. Sagarra
Affiliation:
CIRAD-CA, 37 av. Jean XXIII, BP 6602 Dakar-Etoile, Senegal Department of Natural Resource Sciences, Macdonald Campus of McGill University, Sainte-Anne-de-Bellevue, Quebec, H9X 3V9, Canada
C. Vincent*
Affiliation:
Horticultural Research and Development Center, Agriculture and Agri-Food Canada, 430 Gouin Blvd., Saint-Jean-sur-Richelieu, Quebec, J3B 3E6, Canada
R.K. Stewart
Affiliation:
Department of Natural Resource Sciences, Macdonald Campus of McGill University, Sainte-Anne-de-Bellevue, Quebec, H9X 3V9, Canada
*
*Fax: (450) 346 7740 E-mail: [email protected]
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Abstract

The parasitoid Anagyrus kamali Moursi was recently introduced into the Caribbean as a biological control agent against the hibiscus mealybug, Maconellicoccus hirsutus Green. In the laboratory, parasitoid size, as measured by left hind tibia length, was positively correlated several indicators of the parasitoid‘s fitness: longevity, mating preference, fecundity, reproductive longevity, progeny emergence and sex-ratio. When fed ad libidum with honey drops, large male parasitoids lived significantly longer (29.1 ± 6.5 days) than small ones ± 5.7 days). Large females also lived significantly longer (35.4 ± 10 days) than small females (27.9 ± 9.6 days). Females showed no significant mating preference between large and small males. Lifetime fecundity was positively correlated with the size of adult females ranged from 37 ± 21 eggs for small females to 96 ± 43 eggs for large ones. The reproductive longevity, daily oviposition rate, and number of progeny were also higher among large parasitoids. The sex ratio of progeny from small female parasitoids was higher (0.76 ± than that of large individuals (0.47 ± 0.18).

Type
Research Article
Information
Bulletin of Entomological Research , Volume 91 , Issue 5 , October 2001 , pp. 363 - 367
Copyright
Copyright © Cambridge University Press 2001

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