A number of investigators have shown that larval development can be affected by conditioning of the food medium resulting from the accumulation of waste products such as faeces, silk, pheromones, etc. Gordon et al. (1988) found that larvae of the stored product moth Cadra cautella (Walker) were able to continue growing even after the complete exhaustion of their food supply, an effect which the authors attributed to re-use of faecal material deposited in the conditioned medium. In this paper we develop a model describing the growth, development and survival of a cohort of stored product larvae from egg hatch to pupation. Growth and survival rates are assumed to depend only on energy uptake, which in turn depends both on the quantity and quality of the food medium. We compare the predictions of this model with the experimental observations described and modelled by Gordon et al. (1988). At low initial densities our model behaves in a way that is essentially indistinguishable both from the experimental observations and the predictions of their model. However, at high larval densities, where the Gordon et al. model fails to match observed behaviour, our model predicts survival, development times and weights at maturation closely in accord with those observed.
High Larval Densities Low Initial Densities Energy Uptake Experimental Observations Larval Development Conditioned Medium Food Supply Development Times Re-use Of Material Quality Of Medium
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Round-ups are the summaries of handpicked papers around trending topics published every week. These would enable you to scan through a collection of papers and decide if the paper is relevant to you before actually investing time into reading it.
Climate change Research Articles published between Sep 19, 2022 to Sep 25, 2022
Sep 26, 2022
Articles Included: 5
Disaster Prevention and Management ISSN: 0965-3562 Article publication date: 20 September 2022 This paper applies the theory of cascading, interconnec...Read More
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