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Weather‐mediated regulation of olive scale by two parasitoids
Author(s) -
Rochat Jacques,
Gutierrez Andrew Paul
Publication year - 2001
Publication title -
journal of animal ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.134
H-Index - 157
eISSN - 1365-2656
pISSN - 0021-8790
DOI - 10.1046/j.1365-2656.2001.00505.x
Subject(s) - parasitism , biology , interspecific competition , fecundity , biological pest control , ecology , scale (ratio) , competition (biology) , population , functional response , host (biology) , predation , geography , demography , predator , cartography , sociology
Summary1 The effects of temperature and interspecific competition among two parasitoids ( Aphytis maculicornis (= paramaculicornis ) (Masi) –Coccophagoides utilis Doutt) of the olive scale ( Parlatoria oleae (Colvée)) were examined, and the reason for the successful biological control of olive scale explained. 2 An age‐structure distributed maturation time model of this system was developed that simplifies many of the details of prior physiologically based models. 3 Temperature‐dependent physiological indices were used to scale fecundity and survivorship rates from their maximum values. 4 The distributed maturation time population dynamics model captured the variance in temperature‐related development times required to simulate the dynamics of the system. 5 A type III ratio‐dependent functional response was used to estimate parasitism rate on olive scale and also served to stabilize our single patch model. 6 The model confirms the Huffaker & Kennett (1966) conclusions concerning the role of weather and the relative contribution of the two parasitoids in the regulation of olive scale in California olive.