Comparison of Different Lactation Curve Models of Anatolian Buffaloes

Şahin, Aziz; Ulutaş, Zafer; Yıldırım, Arda; Aksoy, Yüksel; Genç, Serdar

doi:10.9775/kvfd.2014.11140

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…As Figure 3 is examined, it has been determined that males have a higher weight than females in both observed and predicted values in all periods. Sahin et al (22) found that adult live weight was higher in males in all models (Logistic, Gompertz, Richards, Brody) examined in Anatolian buffaloes. Hartati and Putra (6) reported that the animals had similar growth characteristics in all models (Logistik, Gompertz, Von Bertalanffy) which were examined in both sexes in Madura cattle.…”

Section: Resultsmentioning

confidence: 97%

“…This indicates that the 3rd degree polynomial model is the most appropriate model for the growth values of ABC. Monitoring the growth and development of animals during some periods in the growth process will be of great benefit to the farms in terms of herd management, care, and feeding regulation (22). In order to obtain reliable estimates of the growth curve parameters, it may be necessary to collect growth data until the point when the growth curve starts to flatten or the growth rate slows down (11).…”

Section: Resultsmentioning

confidence: 99%

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Identification of Best Growth Curve Model for Anatolian Black Cattle

Sakar,

Koncagül *,

ÜNAL

2023

SVR

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The aim of this study was to identify the model that best describes the growth trajectory from birth to 24 months of age in Anatolian Black Cattle (ABC) raised for con-servation purposes. A total of 493 weight records of 113 animals at birth, 3, 6, 12, 18, and 24 months were collected. Six different non-linear models were used to describe the growth curve of animals: 2nd degree polynomial, 3rd degreee polynomial, Logistic, Brody, Von Bertalanffy, and Gompertz models. In the study, R2 values of the models were: 0.997, 0.999, 0.953, 0.979, 0.924, and 0.862; corel values (correlation between the observed and estimated curves) were 0.994, 0.998, 0.989, 0.993, 0.961, and 0.703; Residual Standard Deviations (RSD) were 3.216, 1.388, 11.533, 3.561, 14.736, and 27.141, respectively. Given these values, it was found that the 3rd degree polynomial model was the best to describe the growth curve of ABC. As a result of the analyses, it was noticed that the values predicted by this model deviated by 1-3 kg from the observed values in all periods and in all environmental factors examined (sex, dam age, parity, birth year and birth, season). It was found that these differences increased up to 4-5 kg only in the 18-month period. The results also showed that ABC continued to grow after 24 months of age. As a result, traits such as age at sexual maturity, breeding age, and slaughter age can be easily predicted by identifying the model that best describes growth and development in herds. Določitev najboljšega modela krivulje rasti za anatolsko črno govedo Izvleček: Namen te študije je bil določiti model, ki najbolje opisuje potek rasti od rojstva do 24 mesecev starosti anatol-skega črnega goveda (ABC), vzrejenega za namene ohranjanja. Zbranih je bilo 493 podatkov o telesni teži 113 živali ob rojstvu ter pri 3, 6, 12, 18 in 24 mesecih starosti. Za opis krivulje rasti živali je bilo uporabljenih šest različnih nelinearnih modelov, in sicer polinom 2. stopnje, polinom 3. stopnje, logistični model ter modeli Brody, Von Bertalanffy in Gompertz. V študiji so bile vrednosti R2 modelov naslednje: 0,997, 0,999, 0,953, 0,979, 0,924 in 0,862; vrednosti correl (korelacija med opazovanimi in ocenjenimi krivuljami) so bile 0,994, 0,998, 0,989, 0,993, 0,961 in 0,703; ostanki standardnih odklonov (RSD) so bili 3,216, 1,388, 11,533, 3,561, 14,736 in 27,141. Glede na te vrednosti je bilo ugotovljeno, da je polinomski model 3. stopnje najbolje opisal krivuljo rasti ABC. Na podlagi analiz je bilo ugotovljeno, da so vrednosti, ki jih je napovedal ta model, za 1-3 kg odstopale od ugotovljenih vrednosti v vseh obdobjih in pri vseh preučevanih okoljskih dejavnikih (spol, starost matere, pariteta, leto rojstva in sezona rojstva). Ugotovljeno je bilo, da so se te razlike povečale na 4-5 kg le v 18-mesečnem obdobju. Rezultati so tudi pokazali, da se je ABC še naprej povečevala po 24 mesecih starosti. Posledično je mogoče lastnosti, kot so starost ob spolni zrelosti, plemenska starost in klavna starost, enostavno napovedati z določitvijo modela, ki najbolje opisuje rast in razvoj v čredah. Ključne besede: anatolsko črno govedo; živa teža; krivulja rasti; nelinearni modeli

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Identification of Best Growth Curve Model for Anatolian Black Cattle

Sakar,

Koncagül *,

ÜNAL

2023

SVR

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“…The time-dependent numeric and dimensional increases in living creatures are described as growth (Sahin et al, 2014). Morphological, physiological and behavioural changes are observed in living creatures during growth.…”

Section: Introductionmentioning

confidence: 99%

Kazlarda Çevresel Zenginleştirmenin Büyüme Üzerine Etkilerinin Bazı Modellerle Karşılaştırılması

Karadavut

Taşkın

DOĞAN

et al. 2022

Türk Tarım Ve Doğa Bilimleri Dergisi

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The aim ofthe present study is to determine the time-dependent changes in the live weights of the geese, for which environmental enrichment was applied (Turkish local goose genotype), between the days 7 and 98. For this purpose, nonlinear Brody, Gompertz, Logistic, von Bertalanffy, and Richards growth models, which are used commonly, were used to determine the growth and development of poultry. Geese were divided into 3 groups (control group (C), broom group (B), mirror group (M)) based on their enrichment characteristics. The success status of the models applied in the present study was assessed based on error mean square (EMS) and coefficient of determination (R2) values. It was found thatR2 value was be 96.86 in the Logistic model, 96.82 in Brody model, 96.16 in vonBertalanffy model,95.04 in Gompertz model and 93.85 in Richards model, respectively, and EMS value was 0.2368 in Logistic model, 0.2004in Brody model, 0.1992 in von Bertalanffy model, 0.3567 in Gompertz model and 0.3711 in Richards model, respectively. As a result, it was concluded that the most suitable models with high coefficient of determination but low error mean square were Brody,Gompertz, and von Bertalanffy models, respectively, in determining the time-dependent live weight change in the geese (Turkish local goose genotype), for which environmental enrichment was applied, and it was suitable to use these three models in determining the effect of environmental enrichment on live weight.

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Bibliometric Analysis of Lactation Curves in Livestock

ERGİN,

ALBAYRAK DELİALİOĞLU,

ALTAY

et al. 2023

Türk Tarım Ve Doğa Bilimleri Dergisi

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Bu çalışma, 1980 ile 2023 yılları arasında WOS veri tabanındaki 1455 çalışmadan elde edilen verilere dayanarak, çiftlik hayvanlarında laktasyon eğrisi modellemesinin bibliyometrik analizini sunmaktadır. Elde edilen sonuçlarda, 26 çalışmayla öne çıkan yazar Macicotta NPP ve çalışma sayısı açısından Cornell Üniversitesi önde gelen kurum olarak görülmüştür. Bu alanda en önemli dergi olarak Journal of Dairy Science, 393 makaleyle öne çıkmaktadır. Temsil edilen ülkeler arasında Türkiye, 44 çalışma ile 13. sırada yer almakta ve bu çalışmaların çoğunluğu yerel yazarlarla iş birliği içinde yürütülmektedir. Bu bulgular, laktasyon eğrileri alanında gelecekteki araştırma çalışmaları için değerli bir perspektif sunmakta ve ortak yazar seçimi, dergi seçimi ve ilgili anahtar kelimeler konusunda rehberlik sağlamaktadır. Çalışmanın sonucunda, çiftlik hayvanlarında laktasyon eğrilerinin kullanımı için farklı matematik modellerin kullanılması ve yaygınlaşması gerektiği düşünülmektedir.

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Comparison of Different Lactation Curve Models of Anatolian Buffaloes

Cited by 4 publications

References 13 publications

Identification of Best Growth Curve Model for Anatolian Black Cattle

Identification of Best Growth Curve Model for Anatolian Black Cattle

Kazlarda Çevresel Zenginleştirmenin Büyüme Üzerine Etkilerinin Bazı Modellerle Karşılaştırılması

Bibliometric Analysis of Lactation Curves in Livestock

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