Island of the clones

Article Abstract:

A sample of larvae is reared to adulthood in the laboratory to test whether the specimens of Ischnura hastata is parthenogenetic. The concept of 'geographic parthenogenesis' proposes that the parthenogenetic forms of a species are more likely to occur in certain areas, like higher altitudes and latitudes and on islands, because of the different selection pressures that organisms face under these conditions.

Genetic aspects, Damselflies, Parthenogenesis, Larvae

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The evolution of aggregation in profitable and unprofitable prey

Article Abstract:

The response of human, Homo sapiens, predators to profitable and unprofitable prey in a computer version of the 'novel world' experiments is investigated. The aggregated unprofitable prey had higher per capita survivorship than solitary unprofitable prey when all prey types were cryptic and all profitable prey were solitary.

Behavior, Human beings, Predation (Biology), Humans, Man

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Mimicry on the edge

Article Abstract:

The studies of mimicry in the animal world which many species adopt to keep predators at bay by evolving unpalatable characteristics are demonstrated.

Analysis, Animal behavior, Mimicry (Biology), Animal defenses, Animal behaviour, Animal defences

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