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Publication Date
1993
Location
New Zealand
Description
Grazers selectively forage within heterogeneous vegetation. Prediction of intake rate necessitates theoretical developments to understand site selection. We tested III optimal foraging model to predict patch selection by cattle in the field, Nine "grazing environments" (GB) consisting of 16 0.36 m2 patches each were created by mowing. Treatments were a factorial of 3 distances between patches and 3 sets of patch heights. Patch residence time (T,) was accurately predicted (r2=0.89), and increased linearly whh patch distance (P
Citation
Laca, Emilio A.; Distel, R A.; Griggs, T C.; Deo, G; and Demment, M W., "Field Test of Optimal Foraging with Cattle: The Marginal Value Theorem Predicts Patch Selection and Utilization" (1993). IGC Proceedings (1985-2023). 18.
(URL: https://uknowledge.uky.edu/igc/1993/session18/18)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Field Test of Optimal Foraging with Cattle: The Marginal Value Theorem Predicts Patch Selection and Utilization
New Zealand
Grazers selectively forage within heterogeneous vegetation. Prediction of intake rate necessitates theoretical developments to understand site selection. We tested III optimal foraging model to predict patch selection by cattle in the field, Nine "grazing environments" (GB) consisting of 16 0.36 m2 patches each were created by mowing. Treatments were a factorial of 3 distances between patches and 3 sets of patch heights. Patch residence time (T,) was accurately predicted (r2=0.89), and increased linearly whh patch distance (P
