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The Quantitative Evaluation of Kerteszia Breeding Grounds^1,2,

The ecological factors affecting the distribution of bromeliads and the anophelines that breed in them in Trinidad are reviewed. It is noted that in defining the distribution of Kerteszia breeding in the bromeliad flora of any vegetation type the following factors have to be considered

(a) intrinsic differences among the various species of bromeliads as potential breeding places,

(b) the relative abundance and vertical distribution of these bromeliads,

(c) the vertical distribution of anopheline oviposition,

(d) the coincidence or noncoincidence of the vertical ranges of the plants and the mosquitoes.

These factors are considered quantitatively in an analysis of the breeding of A. bellator in the bromeliad flora of Trinidad cacao plantations.

It is found that by carefully defining the distribution of breeding the amount of bromeliad destruction necessary for control may be materially reduced.

¹ This paper is part of the series "The Bromeliad-Anopheles-Malaria Complex in Trinidad".

² The studies on which this paper is based were made under the joint auspices of the Trinidad government and the International Health Division of The Rockefeller Foundation.

³ Present address: Department of Biology, Princeton University, Princeton, New Jersey.