Toxicant-induced fecundity compensation: a model of population responses

Journal Article · Tue Mar 01 04:00:00 EST 1983 · Environ. Manage.; (United States)

DOI:https://doi.org/10.1007/BF01867278· OSTI ID:5651644

Jensen, A L; Marshall, J S

A mathematical model widely applied in population studies and in assessment of the impact of exploitation on fish populations was applied to assess cadmium toxicity in laboratory populations of Daphnia galeata mendotae. Over a range of toxicant concentrations, the birth rate of the population increased to balance the death rate and the population compensated for the increased mortality. The model describes the relation between toxicant concentration, toxicant-induced mortality, and equilibrium population size. Compensation for increased mortality is described in terms of the decrease in population size necessary to produce an increase in the birth rate that will balance the increased death rate. The relative capacity of different aquatic organisms to compensate for toxicant-induced mortality is examined and a relation between compensatory capacity and the innate capacity for increase is developed.

• Research Organization: Univ. of Michigan, Ann Arbor
• OSTI ID: 5651644
• Journal Information: Environ. Manage.; (United States), Journal Name: Environ. Manage.; (United States) Vol. 7:2; ISSN EMNGD
• Country of Publication: United States
• Language: English

Related Subjects

560304 -- Chemicals Metabolism & Toxicology-- Invertebrates-- (-1987)
560305* -- Chemicals Metabolism & Toxicology-- Vertebrates-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
ARTHROPODS
BRANCHIOPODS
CADMIUM
CRUSTACEANS
DAPHNIA
ELEMENTS
EXPLOITATION
FISHES
INVERTEBRATES
MATHEMATICAL MODELS
METALS
MORTALITY
POPULATION DYNAMICS
POPULATIONS
TOXICITY
VERTEBRATES