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Calculation of demographic parameters in tropical livestock herds : a discrete time approach with LASER animal-based monitoring data

Author: Matthieu Lesnoff
Publisher: Dordrecht : Springer, 2014.
Edition/Format:   eBook : Document : EnglishView all editions and formats
Summary:
Ruminant livestock (cattle, small ruminants, and camels) have a determinant economic role in many tropical developing countries. In traditional low-input farming systems, demographic parameters (e.g. reproduction or mortality rates) are important indicators for estimating and modelling herd dynamics and production, and impacts of farming practices or environmental risks (droughts, epizootics, etc.). Although such  Read more...
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Genre/Form: Electronic books
Additional Physical Format: Printed edition:
Material Type: Document, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: Matthieu Lesnoff
ISBN: 9789401790260 9401790264 9401790256 9789401790253
OCLC Number: 881066355
Description: 1 online resource (x, 99 pages) : illustrations (some color)
Contents: 1. Introduction1.1. Background and objectives1.2. Animal-based monitoring1.3. A selection of parameters1.4. Organization of the handbook2. Grouping demographic data2.1. Cohort splitting2.2. Pseudo-cohort splitting3. Mortality and offtake rates3.1. One type of removal3.2. Case with two types of removal3.3. Additional points4. Other demographic rates4.1. Reproduction rates4.2. Synthetic rates4.3. Global demographic rates5. Package laserdemog5.1. R software5.2. Functions in laserdemog5.3. Additional points6. Numerical examples6.1. Example 1 - Overall description6.2. Example 2 - More on reproduction rates6.3. Example 3 - Test of a treatment on mortality7. Annexes7.1. Rates p and h in survival analyses7.2. R materials7.3. Structure of tables generated by hsplit and vsplit8. Bibliography
Responsibility: Matthieu Lesnoff ... [and 5 more].

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Having indicators to assess the effect of zootechnical, sanitary, economic or political intervention or the impact of environmental risks makes it possible to draw up strategies for improving  Read more...

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