Web1 de jun. de 2002 · The theory of r- and K-selection was one of the first predictive models for life-history evolution. It helped to galvanize the empirical field of comparative life … Web24 de jun. de 2024 · K-selection works in a density-dependent way while r-selection works in a density-independent way. Thusly, K-selection is expected to favor genotypes that persist at high densities (increasing K) whereas r-selection favors genotypes that increase more quickly at low densities (increasing r) ( Anderson, 1991 ).
R-selected species biology Britannica
WebPopulation growth in K -selected species behaves according to the logistic growth equation: In this equation N is the number of individuals in the population, t is time, and r is the biotic potential. Examples of K -selected species include birds, larger mammals (such as elephants, horses, and primates ), and larger plants. John P. Rafferty Web19 de dez. de 2016 · r selection is a method of rearing offspring with an emphasis on high growth rate and population increase (explanation shows comparison to K selection) r … chips quality
The meanings of r- and K-selection SpringerLink
In ecology, r/K selection theory relates to the selection of combinations of traits in an organism that trade off between quantity and quality of offspring. The focus on either an increased quantity of offspring at the expense of individual parental investment of r-strategists, or on a reduced quantity of offspring with a corresponding increased parental investment of K-strategists, varies widely, seemingly to promote success in particular environments. The concepts of quantity or quality off… Webr-selected species, also called r-strategist, species whose populations are governed by their biotic potential (maximum reproductive capacity, r). Such species make up one of the two generalized life-history strategies posited by American ecologist Robert MacArthur and American biologist Edward O. Wilson; K-selected species—that is, species whose … WebPopulations of Acanthoscelides obtectus were maintained for 7 generations in either low‐ or high‐larval densities in order to examine whether weevils life‐history traits are modified in the direction predicted by r/K‐selection theory. We found that r‐selected population had a higher total fecundity, earlier age at first and last reproduction, and higher intrinsic rate of … graph-focused