Modeling growth curves to estimate the suitable slaughter age for the ostriches (Struthio camelus)
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Date
2025
Authors
Ha Xuan, B.
Han Quang, H.
Dang Vu, H.
Nguyen Thi, H.
Nguyen Thanh, C.
Nguyen Thi, V.
Dang Thuy, N.
Do Duc, L.
Do, H.
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Tropical Animal Health and Production, 2025; 57(4):199-1-199-9
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Ha Xuan Bo, Han Quang Hanh, Do Thi Hue, Dang Vu Hoa, Nguyen Thi Hoa, Nguyen Thanh Cong, Nguyen Thi Vinh, Dang Thuy Nhung, Do Duc Luc
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Abstract
Using an accurate growth curve to estimate the suitable age for slaughter has many benefits for ostrich farming. This study was carried out to compare eight growth curve models for estimating body weight and monthly gain of ostriches raised in tropical conditions and then suggested the suitable slaughter age for these ostriches. Two hundred eighty-two ostriches (124 males and 158 females) were raised from birth to 12 months of age to measure individual monthly body weight, and the growth data was analyzed by R software. Eight growth functions (von Bertalanffy, Bridges, Janoschek, Gompertz, Logistic, Lopez, Richards, and Weibull) were used to create the growth curves of ostrich. The Weibull function was the best model among 8 tested models to describe the growth of both male and female ostriches, and the monthly gain (MG) reached the maximum at the 6th month of age. The maximum average monthly gain (AMG) was obtained between the 9th and 10th month of age for both males and females. The best-fit model in this study (Weibull function) suggests the suitable slaughter ages were estimated from the 9th to 10th month of age for both male and female ostriches, with estimated body weights of 93 kg for male and 90 kg for female.
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© The Author(s) 2025. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.