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Teguh Rafian
University of Lampung
Agriculture, Biological Sciences & Forestry Veterinary

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ACCURACY OF BODY WEIGHT ESTIMATION IN BALI CATTLE (BOS JAVANICUS) USING LAMBOURNE, SCHOORL, DJAGRA, WINTER, AND MULTIPLE LINEAR REGRESSION EQUATIONS Nurliani Erni; Muhammad Rido; Teguh Rafian; suhardi; Ari Wibowo
Journal of Animal Research and Applied Science Vol. 7 No. 1 (2026): June 2026
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/aras.v7i1.44803

Abstract

This study aimed to evaluate the accuracy level of Bali cattle (Bos javanicus) body weight estimation using the Lambourne, Schrool, Djagra, and Winter formulas, and to develop a multiple linear regression model as an alternative method for estimating Bali cattle body weight. The sample consisted of 23 female Bali cattle aged 1–1.5 years based on recording data, selected using a purposive sampling method. The method involved collecting data on chest girth, body length, and actual body weight measured using a weighing scale. The data were analyzed descriptively to obtain the mean, standard deviation, coefficient of variation, estimated body weight calculation results, and percentage bias of the Lambourne, Schrool, Djagra, and Winter formulas, as well as multiple linear regression analysis using IBM SPSS Statistics 22. The average body weight measured using the scale was 152.48 kg, while the estimated body weights were 157.26 kg using the Lambourne formula with a bias of 3.14%, 233.89 kg using the Schrool formula with a bias of 53.39%, 154.34 kg using the Djagra formula with a bias of 1.18%, and 157.62 kg using the Winter formula with a bias of 3.37%. It was concluded that the Djagra formula had the highest level of accuracy, and the regression equation BW = -257.29 + 2.18(CG) + 1.25(BL) with a coefficient of determination of 0.96 can be used as a formula for estimating Bali cattle body weight.
QUALITATIVE CHARACTERIZATION AND INDICATION OF INTROGRESSION IN FEMALE SIKUMBANG JONTI DUCKS IN SMALLHOLDER FARMS OF PADANG CITY Teguh Rafian; Woki Bilyaro; Jonathan A. Lase
Journal of Animal Research and Applied Science Vol. 7 No. 1 (2026): June 2026
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/aras.v7i1.44880

Abstract

This study aimed to analyze the frequency of qualitative phenotypic traits and estimate the introgression value in a population of female Sikumbang Jonti ducks reared in smallholder farms in Padang City, West Sumatra, Indonesia. A total of 44 sexually mature female Sikumbang Jonti ducks were selected using a purposive sampling method. The observed qualitative phenotypic traits included the color and shape of the bill, as well as the coloration of the head, neck, body, wings, thighs, tail, shank, and several other morphological characteristics. Data were analyzed descriptively using phenotypic frequency percentages, while the introgression value was estimated by comparing the phenotypic frequencies of the observed population with those of the original and donor populations. The results showed that several phenotypic traits exhibited dominant frequencies, including flat bill shape, brown eye color, absence of a neck ring, and horizontal body posture, each reaching 100%. Black bill color showed a frequency of 86.36%, while white head and neck coloration reached 90.91% and 88.64%, respectively. Phenotypic variation was observed in several plumage color traits, particularly the brown-white body coloration, which accounted for 59.09% of the population, indicating considerable phenotypic diversity within the population. The introgression value in the Sikumbang Jonti duck population was estimated at 16.90%, with an estimated phenotypic purity level of 83.10%. The study indicates the presence of phenotypic variation that may reflect possible introgression from introduced duck breeds, although molecular studies are required for confirmation.
COMPARISON OF MILK YIELD, FAT, AND PROTEIN CONTENT OF IMPORTED FRIESIAN HOLSTEIN COWS AT BATURRADEN, BANYUMAS, INDONESIA Dian Kurniawati; Teguh Rafian; Kusuma Adhianto
Journal of Animal Research and Applied Science Vol. 7 No. 1 (2026): June 2026
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/aras.v7i1.44936

Abstract

This study aimed to evaluate the effects of the origin of imported Friesian Holstein cows (New Zealand and Australia) on milk yield, milk fat percentage, and milk protein percentage. The study was conducted at the Breeding Center for Superior Livestock and Forage Crops (BPTU-HPT) Baturraden, Banyumas, Indonesia. A total of 100 Friesian Holstein cows were used, consisting of 19 cows imported from New Zealand and 81 cows imported from Australia. Secondary data on milk yield, milk fat percentage, and milk protein percentage were obtained from farm records. Milk yield was standardized to a 305 day mature equivalent (ME) basis. Data were analyzed using an independent samples t-test. The results showed that the origin of imported Friesian Holstein cows significantly affected (P<0.05) milk yield, milk fat percentage, and milk protein percentage. Friesian Holstein cows imported from New Zealand produced 4,450 L ± 1,746 L of milk, with milk fat and protein percentages of 3.90%± 0.59% and 2.94% ± 0.06%, respectively. In contrast, cows imported from Australia produced 5,583 L ± 1,775 L of milk, with milk fat and protein percentages of 4.70% ± 0.72% and 3.23±0.40%, respectively. The overall averages for milk yield, milk fat percentage, and milk protein percentage were 5,016 L± 1,760 L, 4.30%±0.65%, and 3.08%±0.23%, respectively. In conclusion, Friesian Holstein cows imported from Australia exhibited greater milk yield and higher milk fat and protein percentages than those imported from New Zealand under the management conditions of BPTU-HPT Baturraden, Banyumas.
Co-Authors Ari Wibowo Dian Kurniawati Jonathan A. Lase Kusuma Adhianto Muhammad Rido Nurliani Erni suhardi Woki Bilyaro