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Serial Monogamy as Polygyny or Polyandry?

Applications of sexual selection theory to humans lead us to expect that because of mammalian sex differences in obligate parental investment there will be gender differences in fitness variances, and males will benefit more than females from multiple mates. Recent theoretical work in behavioral ecology suggests reality is more complex. In this paper, focused on humans, predictions are derived ...

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Micronutrients: to supplement, or not to supplement?

Tell a smoker to eat a carrot a day and he'll keep the doctor away, but give him regular beta-carotene supplements — the major antioxidant nutrient found in carrots — and you may increase his risk of developing lung cancer. Why? Doctors aren't entirely sure what the difference is between dietary intake and micronutrient supplementa-tion, but they do know that any diet – cancer association is fa...

Dried bet pulp as a barley replacement for fattening lanbs of two iranian breeds of sheep