Monitoring pig weights to optimize growing pig performance : Reducing errors in pig weight measurements

Birgit Schauer

ISBN 10: 3838320123 / ISBN 13: 9783838320120

Published by LAP LAMBERT Academic Publishing, 2009

About this Item

nach der Bestellung gedruckt Neuware - Printed after ordering - This book presents research on sources of errors in pig weight measurements. Three studies were conducted on a New Zealand pig farm. First, finisher pigs fed ad libitum or via a liquid feeding system were weighed four times a day over a four-day period. Results showed that standardizing weighing time reduced fluctuations in pig weights. Next, the effect of overnight feed withdrawal on reducing variation in pig weigths and growth rate was investigated. Feed withdrawal reduced variability by up to 11.5% in grower and finisher pigs, whilst the effect was inconsistent in weaner pigs. Lastly, sampling error was compared when sampling pens from batches of pigs using different sample sizes and sampling methods. Increasing the portion of randomly selected pens reduced sampling error, but in a diminishing manner. Purposive selection of two pens reduced sampling error by 64% compared with random sampling, but it introduces the risk of bias. Thus, pens should be selected at random. Results may serve as an educational tool on how to reduce errors in pig weights. More accurate data will lead to improved interpretability of growth records.

Seller Inventory # 9783838320120

Bibliographic Details

• Title: Monitoring pig weights to optimize growing pig performance : Reducing errors in pig weight measurements
• Publisher: LAP LAMBERT Academic Publishing
• Publication Date: 2009
• Language: English
• ISBN 10: 3838320123
• ISBN 13: 9783838320120
• Binding: Taschenbuch
• Condition: Neu
• Dimensions: 220W x 150H x 10D millimeters 220 millimeters width by 150 millimeters height by 10 millimeters depth
• Weight: 244 grams

About this title

Synopsis

This book presents research on sources of errors in pig weight measurements. Three studies were conducted on a New Zealand pig farm. First, finisher pigs fed ad libitum or via a liquid feeding system were weighed four times a day over a four-day period. Results showed that standardizing weighing time reduced fluctuations in pig weights. Next, the effect of overnight feed withdrawal on reducing variation in pig weigths and growth rate was investigated. Feed withdrawal reduced variability by up to 11.5% in grower and finisher pigs, whilst the effect was inconsistent in weaner pigs. Lastly, sampling error was compared when sampling pens from batches of pigs using different sample sizes and sampling methods. Increasing the portion of randomly selected pens reduced sampling error, but in a diminishing manner. Purposive selection of two pens reduced sampling error by 64% compared with random sampling, but it introduces the risk of bias. Thus, pens should be selected at random. Results may serve as an educational tool on how to reduce errors in pig weights. More accurate data will lead to improved interpretability of growth records.

About the Author

Dr Birgit Schauer, studied veterinary medicine at Ludwig- Maximilian-Univ (LMU). Specialized in epidemiology. German doctorate (joint project betw. LMU and EpiCentre, Massey, NZ). MVSt at the EpiCentre. Since 2008, technical manager of an avian influenza research project in Vietnam (NZAID; Dep. of Animal Health, Vietnam; EpiCentre).