Abstract Animal source foods (ASFs) of a wide variety in the human diet provide high-quality, com... more Abstract Animal source foods (ASFs) of a wide variety in the human diet provide high-quality, complete, readily digestible protein, energy, and vital micronutrients in bioavailable form. This chapter examines the various aspects of ASF consumption. It gives a brief review on ...
This project addressed the prediction of daily intake in grazing cattle using methodologies, mode... more This project addressed the prediction of daily intake in grazing cattle using methodologies, models and experiments that integrate pasture structure and ingestive behavior. The broad objective was to develop concepts of optimal foraging that predicted ingestive behavior and instantaneous intake rate in single and multi-patch environments and extend them to the greater scales of time and space required to predict daily intake. Specific objectives included: to determine how sward structure affects the shape of patch depletion curves, to determine if the basic components of ingestive behavior of animals in groups differs from animals alone, and to evaluate and modify our existing models of foraging behavior and heterogeneity to incorporate larger scales of time and space. Patch depletion was found to be predominantly by horizon, with a significant decline in bite weight during horizon depletion. This decline derives from bite overlap, and is more pronounced on taller swards. These resu...
Quarterly Journal of Experimental Physiology, 1989
Factors determining the digestive efficiency of donkeys were studied in animals fed either a low ... more Factors determining the digestive efficiency of donkeys were studied in animals fed either a low quality roughage (wheat straw: 77·1% neutral detergent fibre, 2·8% crude protein) or a high quality forage (alfalfa hay: 47·5% neutral detergent fibre, 22·7% crude protein). The neutral detergent fibre (NDF) intake when fed wheat straw was 1693 ± 268 g animal−1 day−1, 10% higher than when fed alfalfa hay. Digestive coefficient of NDF and acid detergent fibre (ADF) when fed wheat straw amounted to 50·9 ± 4·9 and 42·0 ± 4·1% respectively. NDF and ADF apparent digestibilities and mean retention times (37·7 ± 1·7 and 36·4 ± 3·2 h respectively) were not significantly different (P 〉 0·05) between the two diets. The donkey appears to digest cell wall constituents as efficiently as the Bedouin goat when on low quality roughage, but less efficiently when fed alfalfa hay. Its energy digestibility is, however, as high as that reported for the Bedouin goat. The donkey's high energy digestibility...
Abstract Animal source foods (ASFs) of a wide variety in the human diet provide high-quality, com... more Abstract Animal source foods (ASFs) of a wide variety in the human diet provide high-quality, complete, readily digestible protein, energy, and vital micronutrients in bioavailable form. This chapter examines the various aspects of ASF consumption. It gives a brief review on ...
This project addressed the prediction of daily intake in grazing cattle using methodologies, mode... more This project addressed the prediction of daily intake in grazing cattle using methodologies, models and experiments that integrate pasture structure and ingestive behavior. The broad objective was to develop concepts of optimal foraging that predicted ingestive behavior and instantaneous intake rate in single and multi-patch environments and extend them to the greater scales of time and space required to predict daily intake. Specific objectives included: to determine how sward structure affects the shape of patch depletion curves, to determine if the basic components of ingestive behavior of animals in groups differs from animals alone, and to evaluate and modify our existing models of foraging behavior and heterogeneity to incorporate larger scales of time and space. Patch depletion was found to be predominantly by horizon, with a significant decline in bite weight during horizon depletion. This decline derives from bite overlap, and is more pronounced on taller swards. These resu...
Quarterly Journal of Experimental Physiology, 1989
Factors determining the digestive efficiency of donkeys were studied in animals fed either a low ... more Factors determining the digestive efficiency of donkeys were studied in animals fed either a low quality roughage (wheat straw: 77·1% neutral detergent fibre, 2·8% crude protein) or a high quality forage (alfalfa hay: 47·5% neutral detergent fibre, 22·7% crude protein). The neutral detergent fibre (NDF) intake when fed wheat straw was 1693 ± 268 g animal−1 day−1, 10% higher than when fed alfalfa hay. Digestive coefficient of NDF and acid detergent fibre (ADF) when fed wheat straw amounted to 50·9 ± 4·9 and 42·0 ± 4·1% respectively. NDF and ADF apparent digestibilities and mean retention times (37·7 ± 1·7 and 36·4 ± 3·2 h respectively) were not significantly different (P 〉 0·05) between the two diets. The donkey appears to digest cell wall constituents as efficiently as the Bedouin goat when on low quality roughage, but less efficiently when fed alfalfa hay. Its energy digestibility is, however, as high as that reported for the Bedouin goat. The donkey's high energy digestibility...
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