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CAB eBooks

Ebooks on agriculture and the applied life sciences from CAB International

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CABI Book Chapter Info
Cover for Simulation exercises for animal science MSc students: rumen digestion and pig growth.

The objective of this chapter is to provide two complete teaching modules for MSc students of animal science (in Wageningen University, The Netherlands) with minimal background in modelling, but knowledge in animal nutrition at the BSc level. In working through the first module, students will...

Author(s)
Gerritis, W. J. J.; Kebreab, E.; Kramer, M. R.; Dijkstra, J.
ISBN
2008 CABI (H ISBN 9781845933548)
Type
Book chapter
CABI Book Chapter Info
Cover for A kinetic model of phosphorus metabolism in growing sheep.

Research in Brazil has been carried out to study phosphorus (P) metabolism in ruminants, by using the isotope dilution technique. The purpose of this study was to use data from balance and kinetic experiments to solve a kinetic model of P metabolism in growing sheep fed with different diets. During ...

Author(s)
Dias, R. S.; Roque, A. R.; Nascimento Filho, V. F.; Vitti, D. M. S. S.; Bueno, I. C. S.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Dynamic simulation of phosphorus utilization in salmonid fish.

Minimizing phosphorus (P) wastes is a key factor for environmental sustainability of freshwater aquaculture operations. A dynamic model was constructed to simulate P utilization in salmonid fish through digestion, body deposition and excretion into urine and faeces. Dietary P was classified into...

Author(s)
Hua, K.; Cant, J. P.; Bureau, D. P.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Estimating the risk of hypomagnesaemic tetany in dairy herds.

A model of magnesium dynamics in sheep has been adapted and improved as part of a programme to develop a tool that will assist dairy farmers to assess the risk of animals in a milking herd suffering from hypomagnesaemic tetany. The terms in the model for hindgut absorption have been altered to...

Author(s)
Bell, S. T.; McKinnon, A. E.; Sykes, A. R.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Modelling the effects of environmental stressors on the performance of growing pigs: from individuals to populations.

A simulation model that predicts the performance of a population of growing pigs when raised under given dietary, physical and social environmental conditions has been constructed. The aim was to investigate through the model the impact of between-animal variation on the response of a population to ...

Author(s)
Wellock, I. J.; Emmans, G. C.; Kyriazakis, I.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Empirical modelling through meta-analysis vs mechanistic modelling.

During the 1980s numerous papers had underlined that a mechanistic model would be more appropriate than an empirical one to understand and simulate animal responses to diets. The major criticism against empirical models was the strong limitation of their possibilities of application beyond the...

Author(s)
Sauvant, D.; Martin, O.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Iterative development, evaluation and optimal parameter estimation of a dynamic simulation model: a case study.

Parameter estimation and model evaluation are crucial parts of the development of predictive simulation models. However, a lack of synchronization is often observed in the activities of modelling and experimentation in agriculture. One of the causes of the communication gap between modellers and...

Author(s)
Barioni, L. G.; Oltjen, J. W.; Sainz, R. D.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Segmented, constrained, non-linear, multi-objective, dynamic optimization methodology applied to the dairy cow ration formulation problem.

In the last meeting of this series of modelling workshops we reported on the development of an optimization scheme for dealing with dairy cow ration formulation, in an optimal way, in the situation where constraints were both non-linear and discontinuous in their arguments. Indeed, we illustrated...

Author(s)
Boston, R. C.; Hanigan, M. D.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Investigating daily changes in food intake by ruminants.

Trajectories of food intake for 12 sets of animals (weekly average intakes of four individual growing sheep, mean daily intakes of four pens of three growing cattle, and the mean daily intakes of four groups of six pregnant fallow does) were examined. The raw data exhibited expected seasonal...

Author(s)
Dryden, G. M.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for An ingredient-based input scheme for Molly.

The model described by Baldwin and co-workers (Baldwin et al., 1987; Baldwin, 1995) known as Molly utilizes a nutrient-based input scheme, where each nutrient is generally treated as a homogeneous substrate regardless of the source of that nutrient. The exception is a limited, discrete...

Author(s)
Hanigan, M. D.; Bateman, H. G.; Fadel, J. G.; McNamara, J. P.; Smith, N. E.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper

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