The effect of stochastic variation on kin selection in a budding-viscous population

Article Abstract:

Research shows that an altruist allele in kin selection does not work without stochastic variation but it confirms Hamilton's rule if sufficient amounts of random variation are present. The two constituents of kin selection dynamics, the within-group one and the among-group one were studied. The within-group constituent dominates in viscous populations, but the altruist allele does not. In stochastic variation, however, the among-groups constituent functions and the altruist allele works if it concurs with Hamilton's rule.

Influence, Kin selection (Evolution), Kin selection (Natural selection), Random variables

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Cross-scale patterns of particulate food acquisition in marine benthic environments

Article Abstract:

The patterns of distribution and behavior of food particles possibly determine the general type of specie assemblages at any given location within an area. There is an indication of association among the morphological characters which is explained by mechanical principles as a cross-scale trapping array of favored particle types. The characters of high slenderness ratio species have a cross-scale pattern providing remarkable advantage in trapping fine suspended particles by avoiding coarse particle.

Health aspects, Analysis, Animal nutrition, Marine biology, Morphology (Animals), Animal morphology

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Bet-hedging diapause strategies in stochastic environments

Article Abstract:

Research on chestnut weevils shows that bet-hedging dormancy strategies, or several strategies with emergence from dormancy after one or two years, produces weevils that are more fit than prolonged diapause, or emergence after two years, or simple diapause, or emergence after one year. This advantage, however, is negatively influenced by the lack of limitations on population size.

France, Statistical Data Included, Models, Behavior, Beetles, Stochastic processes, Diapause, Insect populations, Dormancy (Biology)

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