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The law of tolerance, or theory of tolerance, is best illustrated by a bell shaped curve. The range of the optimum. Tolerance ranges are not necessarily fixed. They can change as: Seasons change. Environmental conditions change. Life stage of the organism changes. Example – blue crabs. The eggs and larvae require higher salinity than adults.
A tolerance interval (TI) is a statistical interval within which, with some confidence level, a specified sampled proportion of a population falls. "More specifically, a 100×p%/100×(1−α) tolerance interval provides limits within which at least a certain proportion (p) of the population falls with a given level of confidence (1−α)."
The fundamental geographic range of a species is the area it occupies in which environmental conditions are favorable, without restriction from barriers to disperse or colonize. [4] A species will be confined to its realized geographic range when confronting biotic interactions or abiotic barriers that limit dispersal, a more narrow subset of ...
Levels of Environmental Sensitivity often vary considerably from individual to individual, with some being more and others less sensitive to the same conditions. Such differences have been observed across many species such as pumpkinseed fish, zebra finches, mice, non-human primates and humans, indicating that there is a biological basis to ...
Phenotypic plasticity refers to some of the changes in an organism's behavior, morphology and physiology in response to a unique environment. [1] [2] Fundamental to the way in which organisms cope with environmental variation, phenotypic plasticity encompasses all types of environmentally induced changes (e.g. morphological, physiological, behavioural, phenological) that may or may not be ...
The killer ape theory or killer ape hypothesis is the theory that war and interpersonal aggression was the driving force behind human evolution.It was originated by Raymond Dart in his 1953 article "The predatory transition from ape to man"; it was developed further in African Genesis by Robert Ardrey in 1961. [1]
Over the course of the 20th century, it became a seminal text in the field of comparative psychology, significantly influencing the study of apes. [ 3 ] [ 4 ] [ 5 ] The increased interest was "followed by nearly a century of German primate research, observations of gorillas in Germany’s sophisticated zoos, and public funding for the study of ...
Often the data collected is inadequate to produce a range wide enough to observe the dose in which biological responses are not induced in humans. [17] The dose which is sufficiently low to prevent the occurrence of the response in humans cannot be evaluated and therefore paves the way to the second step, extrapolation of the dose-response ...