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Why Camera-Based and Scale-Based Measurements Differ: A Physiological Model of Diurnal Weight Variation in Finishing Pigs
http://hdl.handle.net/10458/0002002415
http://hdl.handle.net/10458/0002002415c4bc99f7-5516-4ab9-9032-be43f5548f33
| 名前 / ファイル | ライセンス | アクション |
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| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||||||||
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| 公開日 | 2026-03-23 | |||||||||||||||||
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| タイトル | Why Camera-Based and Scale-Based Measurements Differ: A Physiological Model of Diurnal Weight Variation in Finishing Pigs | |||||||||||||||||
| 言語 | en | |||||||||||||||||
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| 言語 | eng | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| キーワード | body weight fluctuation | |||||||||||||||||
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| 言語 | en | |||||||||||||||||
| キーワード | camera-based estimation | |||||||||||||||||
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| 言語 | en | |||||||||||||||||
| キーワード | feeding behavior | |||||||||||||||||
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| 言語 | en | |||||||||||||||||
| キーワード | finishing pigs | |||||||||||||||||
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| 言語 | en | |||||||||||||||||
| キーワード | precision livestock farming | |||||||||||||||||
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| 言語 | en | |||||||||||||||||
| キーワード | simulation model | |||||||||||||||||
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| 言語 | en | |||||||||||||||||
| キーワード | water intake | |||||||||||||||||
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| 言語 | en | |||||||||||||||||
| キーワード | weight measurement accuracy | |||||||||||||||||
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| 資源タイプ | journal article | |||||||||||||||||
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| アクセス権 | open access | |||||||||||||||||
| 著者 |
川末, 紀功仁
× 川末, 紀功仁
WEKO
5637
× ウイン, キンダゴン× 徳永, 忠昭
WEKO
16951
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| 内容記述タイプ | Abstract | |||||||||||||||||
| 内容記述 | Live weight is widely used as a reference indicator for growth performance and for evaluating the accuracy of weight measurement technologies in pig production. However, live weight is not a fixed physiological quantity, and finishing pigs naturally experience substantial short-term mass fluctuations due to normal behaviors such as drinking, feeding, urination, and defecation. In this study, we integrated published physiological and behavioral parameters into a stochastic simulation model to quantify within-day live-weight dynamics in finishing pigs weighing approximately 100 kg. The simulation was conducted with 1-min temporal resolution over a 24-h period. The model demonstrated that short-term weight fluctuations of approximately ±3-5 kg can occur within a single day, even when measurement error is minimal. Across 1000 simulated pigs, the mean daily fluctuation range was 4.2 kg, confirming that kilogram-scale variation is physiologically expected under normal conditions. These results provide a plausible physiological basis for understanding the frequently reported discrepancies between camera-based weight estimates and instantaneous floor-scale measurements. Camera systems primarily reflect body mass derived from external morphology, whereas floor scales measure instantaneous total mass that includes transient contributions from gastrointestinal contents, ingested water, and retained waste. Consequently, direct comparisons based on instantaneous scale readings can be misleading when used as ground truth. Our findings indicate that commonly cited accuracy claims of ±2-3 kg for camera weighing systems should be interpreted with caution, as normal physiological weight variation often exceeds this range. Recognizing live weight as a dynamic physiological variable is essential for developing biologically meaningful evaluation frameworks and for the appropriate interpretation and comparison of weight measurement technologies in precision livestock farming. | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 書誌情報 |
en : Animals 巻 16, 号 3, p. 498, 発行日 2026-02-05 |
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| 出版者 | MDPI AG | |||||||||||||||||
| 言語 | en | |||||||||||||||||
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| 収録物識別子タイプ | EISSN | |||||||||||||||||
| 収録物識別子 | 20762615 | |||||||||||||||||
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| 関連タイプ | isVersionOf | |||||||||||||||||
| 識別子タイプ | DOI | |||||||||||||||||
| 関連識別子 | https://doi.org/10.3390/ani16030498 | |||||||||||||||||
| 権利 | ||||||||||||||||||
| 権利情報 | © 2026 by the authors. | |||||||||||||||||
| 言語 | en | |||||||||||||||||
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| 出版タイプ | VoR | |||||||||||||||||
