https://quantfilab.github.io/pmarupanthorn/tags/morphometric-traits/Morphometric TraitsHugo Blox Builder (https://hugoblox.com)en-usThu, 28 Sep 2023 00:00:00 +0000https://quantfilab.github.io/pmarupanthorn/media/icon_hu68170e94a17a2a43d6dcb45cf0e8e589_3079_512x512_fill_lanczos_center_3.pnghttps://quantfilab.github.io/pmarupanthorn/tags/morphometric-traits/https://quantfilab.github.io/pmarupanthorn/publication/kaj2023/Thu, 28 Sep 2023 00:00:00 +0000https://quantfilab.github.io/pmarupanthorn/publication/kaj2023/<div class="research-bilingual" data-research-bilingual> <section id="research-content-KAJ2023-en" class="research-language-panel" lang="en"> <figure class="research-concept-map research-concept-map--image"> <img src="https://quantfilab.github.io/pmarupanthorn/pmarupanthorn/publication/kaj2023/concept-map-en.png" alt="Conceptual map: comparing four chicken groups under common rearing conditions" loading="eager"> </figure> <h2>The problem</h2> <p>Farmers and breed-development programmes lacked a direct comparison of Maehongson chickens with Praduhangdum, male layer, and broiler chickens raised under the same conditions. Evidence was needed on growth, feed efficiency, body form, and distinctive traits to support production choices and local-breed development.</p> <p><strong>Who benefits:</strong></p> <ul> <li>Native-chicken farmers and producer groups</li> <li>Livestock breeders and extension officers</li> <li>Agricultural and animal-science researchers</li> <li>Communities developing Maehongson chicken as a geographical-indication product</li> </ul> <h2>Method</h2> <p>A completely randomised experiment used 600 one-day-old chickens: 150 Maehongson, 150 Praduhangdum, 150 male Rhode Island Red layers, and 150 ROSS-308 broilers, with ten pens of fifteen birds per group. All groups received the same commercial native-chicken feed and unrestricted water under common housing conditions. Body weight and feed intake were recorded weekly; eight morphometric traits were measured by sex at several ages; and the crowing of thirty 16-week-old Maehongson males was recorded over 24 hours in eight three-hour periods. The analysis combined ANOVA with Duncan&#39;s multiple-range test, Pearson correlation, three-cluster K-means, and Poisson regression.</p> <h2>Results</h2> <p>Broilers had the highest average daily gain at 32.53 grams per day, followed by Praduhangdum at 17.76, male layers at 9.79, and Maehongson chickens at 8.52. Broilers also had the most favourable feed conversion from zero to five weeks (1.37), while Praduhangdum reached the highest final body weight at sixteen weeks (2,011 grams). Female Maehongson chickens had the smallest body width at five and sixteen weeks. The thirty Maehongson males produced 1,219 crows in 24 hours, peaking from 09:00 to 12:00; clustering and regression linked frequent crowing particularly with body height and body weight, providing traits useful for breeding and crowing-contest selection.</p> </section> </div>