Disposable-soma senescence mediated by sexual selection in an ungulate

Article Abstract:

Teeths that have fixed dimensions early in life, but that wear during chewing, can be taken as a measure of total lifetime 'repair', and their wear rate as a measure of current expenditure in performance. Carcasses of 2,141 male and 739 female red deer of different ages were studied, finding that male molariform teeth emerged at a far smaller size than expected from body size dimorphism.

United States, Evolution (Biology), Evolution, Dental anthropology

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Causing a commotion

Article Abstract:

Standard evolutionary theory models the evolutionary consequences of niche construction solely in terms of fitness pay-offs to the genes expressed in niche construction. Niche construction can create new equilibria, affect the stability of others, generate unusual phenomena, such as momentum effects and inertia affects as well as opposite and catastrophic responses to selection.

Models, Niche (Ecology), Niches (Ecology)

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Patterns of predation in a diverse predator-prey system

Article Abstract:

Research shows that biodiversity in terms of predators and prey causes both predation and resource limitation to act simultaneously to affect herbivore populations. Data indicate that small ungulates are more exposed to predators due to opportunistic predation than larger ungulates. Furthermore, they are also subjected to greater predation rates.

Canada, Tanzania, Analysis, Behavior, Predation (Biology), Predatory animals

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