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Full-Text Articles in Life Sciences

What Makes An Animal Choose A Forage, Elizabeth A. Burritt, Frederick D. Provenza Dec 2002

What Makes An Animal Choose A Forage, Elizabeth A. Burritt, Frederick D. Provenza

Wildland Resources Faculty Publications

Consider the following scenarios: To cut the costs of ranching a researcher explores feeding cattle ammoniated straw in winter. Some of the cows maintain themselves on the diet while others lose weight, produce less milk and fail to conceive. A producer in Missouri plants a pasture rich in legumes and high in crude protein, yet his cattle prefer moldy hay and endophyte infected tall fescue to the legumes. Why do animals behave this way? Animals are thought to prefer foods that are palatable but what is palatability? We define palatability as the interrelationship between a food's flavor and postingestive feedback …


Development Of A Bird-Avoidance Model For Naval Air Facility El Centro, California, E. J. Zakrajsek, John A. Bissonette Jun 2002

Development Of A Bird-Avoidance Model For Naval Air Facility El Centro, California, E. J. Zakrajsek, John A. Bissonette

Wildland Resources Faculty Publications

Bird-strikes (collisions between birds and aircraft) pose a significant threat to aviation safety. Naval Air Facility El Centro, CA lost an F-18 jet to a bird strike in October 1995. To help combat this threat we developed a bird-avoidance model as a risk management tool to help the Navy plan training flights in areas and during times of low bird activity at the installation. The calculated bird-strike risks were published as a web page to be maintained on the installation’s internet server for easy access by flight crews, flight-safety officers, airfield managers, natural resource managers, and other Navy personnel.