PREDATION-BALANCED POLYMORPHISM OF CERIODAPHNIA CORNUTA SARS1
نویسندگان
چکیده
منابع مشابه
Effects of a vertebrate predator (Poecillia reticulata) presence on Ceriodaphnia cornuta (Cladocera: Crustacea) in laboratory conditions
Aim: To detect the induction of morphological and populational alterations on Ceriodaphnia cornuta concerning cyclomorphosis and population dynamic parameters as densities, fecundity rates, juveniles percentage, males presence and ephippia presence in the presence of predators; Methods: Two experiments were performed: Experiments with fishes fed on Ceriodaphnia cornuta – Experiment 1 – and “Fis...
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Departamento de Biologia Geral, Instituto de Ciências Biológicas – ICB, Universidade Federal de Minas Gerais – UFMG, Avenida Antônio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Carlos – UFSCar, Rodovia Washington Luiz, Km 235, CEP 13565-905, São Carlos, SP, Brazil Departamento de Hidráulica e Transportes, Cen...
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Taxonomy of the genus Ceriodaphnia Dana, 1853 (Cladocera: Daphniidae) has been uncertain for a long time, the species richness was often underestimated due to (1) a morphological similarity among the species and (2) their great morphological inter- and intra- populational variability. Support for this conclusion comes from the first analysis of three molecular markers for Australian representat...
متن کاملIs Pi a selectively balanced polymorphism?
A stable polymorphism of the Pi alleles M1, M2 and M3 close to their observed frequencies has been predicted, simply by relating fitness to the proportion of each genotype having alpha 1-antitrypsin (alpha 1-AT) levels greater than 100 mg/100 ml. By further specifying that the rare S and Z genotypes with low alpha 1-AT levels have enhanced fertility, equilibria of the M, S and Z alleles have al...
متن کاملFrequency-dependent predation and maintenance of prey polymorphism.
In positive frequency-dependent predation, predation risk of an individual prey correlates positively with the frequency of that prey type. In a number of small-scale experiments individual predators have shown frequency-dependent behaviour, often leading to the conclusion that a population of such predators could maintain prey polymorphism. Using simulations, I studied the dynamics of frequenc...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 1969
ISSN: 0024-3590
DOI: 10.4319/lo.1969.14.2.0301