THE EVOLUTION OF HOST‐FEEDING BEHAVIOUR IN INSECT PARASITOIDS
Host feeding, egg maturation, resorption, and longevity in the parasitoid Aphytis melinus (Hymenoptera: Aphelinidae).
- T. Collier
- 1 March 1995
Host feeding appeared to supply a metabolic nutrient demand as well as egg maturation in Aphytis ; females that received honey ad libitum but no host meals resorbed eggs until they had few or no eggs left and then died, while females given a host meal and honey ad Libitum produced more eggs and ultimately lived longer.
A critical evaluation of augmentative biological control
Adding physiological realism to dynamic state variable models of parasitoid host feeding
- T. Collier
- BiologyEvolutionary Ecology
- 1 May 1995
A new dynamic state variable model is developed which incorporates the physiological features associated with host feeding in Aphytis melinus to make qualitative predictions about the effects of various physiological featues on host-feeding behaviour and to make quantitative prediction about the relationship between egg load and host feeding.
Egg load and the decision to host feed in the parasitoid Aphytis melinus
Two additional models are developed that incorporate a delay by adding extra «pre-egg» state variables to the simple model that predicts that parasitoids should host-feed only when completely empty of eggs.
Dynamical effects of host-feeding in parasitoids
It is found that host-feeding per se had no effect on the stability of interacting host and parasitoid populations and an input of protein that could be used to produce eggs from a source other than the host had a stabilizing effect.
Duplication diet study on mercury intake by fish consumers in the United Kingdom.
- J. Sherlock, D. Lindsay, J. Hislop, W. Evans, T. Collier
- Environmental ScienceArchives of Environmental Health An International…
- 1 September 1982
The results from the present study indicate that people in the United Kingdom are unlikely to be adversely affected by the presence of methylmercury in the fish they consume.
Egg Size, Intrinsic Competition, and Lethal Interference in the Parasitoids Encarsia pergandiella and Encarsia formosa
Host feeding on parasitized hosts contradicts assumptions about the nature of interference competition in existing population dynamics models, and the parasitoid species with smaller eggs prevailed in intrinsic competition.
Effects of Trophic Level and Metamorphosis on Discrimination of Hydrogen Isotopes in a Plant-Herbivore System
- J. Peters, Nathan Wolf, C. A. Stricker, T. Collier, C. Martinez del Rio
- Environmental SciencePLoS ONE
- 28 March 2012
The isotopic value of carbon was transferred more or less faithfully across trophic levels, but δ15N values increased from plants to insects and the authors observed significant non-trophic 15N enrichment in the metamorphosis from larvae to adult.
Prospects for integrated control of olive fruit fly are promising in California.
Prospects for olive fruit fly control in Calif-ornia are good, and effective manage-ment is likely to result from careful monitoring and properly timed chemical control.