Species-specific behavioural responses to environmental variation as a potential species coexistence mechanism in ants.

A fundamental question of ecology is why species coexist in the same habitat. Coexistence can be enabled through niche differentiation, mediated by trait differentiation. Here, behaviour constitutes an often-overlooked set of traits.

The activity of closantel as an equine antiparasitic agent.

Eighteen pony foals were experimentally infected with 500 third stage larvae of Strongylus vulgaris at 2 weeks, and at 2, 4, 6 and 8 months after birth. For the duration of the study, all foals were kept in the same pasture with their mothers to allow natural infection with other parasites by exposure to a contaminated environment. Twelve of the foals were utilized in groups of 3 and treated orally five times at two month intervals starting at one month of age with closantel at doses of 5, 10, 20 or 40 mg kg-1.

The effect of coffee consumption on plasma lipids, lipoproteins, and the development of aortic atherosclerosis in rhesus monkeys fed an atherogenic diet.

Rhesus monkeys (seven females and six males) were fed ad libitum a diet comparable to that consumed by humans, containing 25% by weight fat (40% of calories) and 0.15% cholesterol (0.3 mg/kcal) for 12 months (phase 1).