The Canadian Entomologist · 1968 · 31 citations · 7 references
Life SciencesBiologyEntomologyInsect EcologyPhysiological EcologyPopulation EcologyInsect Life History EcologyInsect Population DynamicsOviposition BehaviorReproductive EcologySeasonal ReproductionAge-specific FecundityGeneration Time AnalysisOviposition BiologyOviposition RateTemperature Effects On OvipositionTemperature Effects On Population DynamicsTemperature-dependent Population DynamicsThermal Biology
Abstract Oviposition of the predacious mites Phytoseiulus persimilis and Typhlodromus fallacis began 2 days after mating, reached a peak in 1 week, and then declined irregularly. The rates of oviposition were higher, and the oviposition period shorter at 26° than at 20°C. P . persimilis laid 47% more eggs than T . fallacis . The generation time for both species was very dependent on temperature. Minimum values of 112 hours for P . persimilis and 127 hours for T . fallacis were obtained at 28°. Calculations of potential predator populations from the generation time, age-specific fecundity, and proportion of females were made on a daily basis for successive generations. The potential number of living females derived from one mated pair increased logarithmically after a few cycles representing new generations. The rate of increase of P . persimilis populations was 26% higher than that of T . fallacis , and in both species the rate at 26° was about double the rate at 20°.
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