On the dynamics of a toxicant-individual system.
The dynamics of a toxicant-individual model where the individual is represented by von Bertalanffy dynamics and the uptake model component is one developed by Barber, Suarez & Lassiter is discussed. A sufficient condition for the death of an individual subjected to chemical stress is found. Another possible behavior of the system is an oscillatory mode of individual size and internal chemical concentration determined by a limit cycle. These fluctuations are a consequence of formulations of growth, maintenance, and the dose-response functions in the model system.
Hallam
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TG
Department of Mathematics, University of Tennessee, Knoxville 37996-1300.
Huang
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YN
D000818:Animals; D001835:Body Weight; D005399:Fishes; D015386:Hazardous Substances / Q000494:pharmacology*; D008954:Models, Biological
D015386:Hazardous Substances