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Investigates acquisition of food by three- to six-month old hand-reared coyotes of different social rank in an area familiar to the coyotes with and without (safe and potentially unsafe environments). Assessment of data; Suggests the importance of social rank as a role in the coyote's vulnerability to novel conditions.

Studies the early mortality of newborn guanacos by birth mass and hematological parameters. Methodology used; Percentage of newborn guanacos that died within 10 days of life; Results of the study.