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Relationship between mated status of females and their stage of ovarian development in field populations of the australian sheep blowfly, lucilia cuprina(wiedemann) (diptera: calliphoridae)

Published online by Cambridge University Press:  10 July 2009

L. Barton Browne
Affiliation:
CSIRO, Division of Entomology, GPO Box 1700, Canberra, A.C.T. 2601, Australia
A. C. M. Van Gerwen
Affiliation:
CSIRO, Division of Entomology, GPO Box 1700, Canberra, A.C.T. 2601, Australia
P. H. Smith
Affiliation:
CSIRO, Division of Entomology, GPO Box 1700, Canberra, A.C.T. 2601, Australia

Abstract

In field populations of Lucilia cuprina (Wiedemann) in Australia, there was a very low percentage of mating in females that, on the evidence of their stage of ovarian development, had not yet consumed protein-rich material. Virtually all females whose oocytes had reached early vitellogenesis had mated. Thus, most females of this anautogenous species had mated soon after their ovarian development had proceeded beyond the resting stage at which development ceases in females that have not consumed protein. The relationship between mated status and ovarian development of hand-caught females did not differ from that for females which had been allowed to remain for more than 1 h with sexually active males in the collection chamber of traps. Thus mating occurred rarely, if at all, in the trap chambers, which suggests that females in the field mate soon after first becoming sexually receptive. This, together with knowledge that females of this species do not remate readily, indicates that the operational sex ratio in L. cuprina is heavily male-biased.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1987

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