The Effects of Humans on animal behaviour

[brotherbear]

Perhaps no other non-domesticated animal in history has ever been so strongly affected by human impact as the grizzly ( Ursus arctos ). First of all his diet and lifestyle. Before humans became so overwhelmingly over-populated and armed with weapons far advanced above those of earlier stone-age peoples, grizzlies were, for the most part, primarily carnivorous omnivores. It has been estimated that their diet was roughly 85% meat and 15% vegetation, insects, honey, etc. Grizzlies were more predatory than those living today though they were scavengers as well. Today, most grizzly populations are normally about 75% vegetarian. Today's grizzly is a more shy and elusive bear than his more highly aggressive predecessors. Bears are intelligent animals and they have learned of the killing power of the modern rifle. Their change in diet and behavior has also led to smaller size. Prey animals are certainly less abundant even for when a grizzly does decide to hunt. Their size, diet, habits, and temperament changes can clearly be seen within the populations of grizzlies in North America and Europe, after learning of their historic ancestors. I feel sure the same holds true for their Asian relatives. 
 
  

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