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All Journal Journal of Agriculture and Animal Science Jurnal Peternakan Lingkungan Tropis
Amani Aldiyanti
Mulawarman University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Veterinary

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Breeding System Characteristics and Egg Production Performance of Crossbred Native Chickens in Humid Tropical Smallholder Farms: Evidence from a Case Study in Indonesia Akhmat Rizkuna; Roosena Yusuf; Julinda Romauli Manullang; Amani Aldiyanti
AgriMalS Vol 6 No 2 (2026): Volume 6 Nomor 2 Tahun 2026
Publisher : Sentra Kekayaan Intelektual dan Publikasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47637/jkyfcb03

Abstract

Crossbred native chickens are widely raised in smallholder farming systems in tropical environments for egg and day-old chick (DOC) production. This study aimed to characterize breeder management practices and egg production performance on five smallholder farms in Samarinda City, Indonesia. A descriptive observational study was conducted using purposively selected farms. Data were collected through farm observations, farmer interviews, environmental measurements, and available production records, and were analyzed descriptively. Farmers had 2–9 years of farming experience, and four farms used intensive management while one used a semi-intensive system. The number of breeding hens ranged from 30 to 50 per farm, with male-to-female ratios of 1:4.3 to 1:6. Daily egg production ranged from 12 to 40 eggs per farm, corresponding to a hen-day egg production (HDP) of 36.0%–85.7%. Reported feed protein content ranged from 17% to 20%, while feed consumption ranged from 80 to 120 g/bird/day. Housing density ranged from 1.60 to 3.00 birds/m², temperature from 28 to 29 °C, relative humidity from 60% to 75%, and temperature-humidity index (THI) from 77.03 to 80.60. Egg production-based breeder selection practices varied among farms. Because the study involved only five purposively selected farms and descriptive analysis without inferential statistical testing or continuous production monitoring, the findings describe the selected farms and do not establish causal relationships or support generalization to all smallholder farms. Further research involving more farms and systematic production monitoring is needed to investigate relationships between breeder management, environmental conditions, and egg production performance.
Relationship between Egg Weight and Hatching Performance in Japanese Quail (Coturnix japonica) Amani Aldiyanti; Akhmat Rizkuna; Julinda Romauli Manullang; Roosena Yusuf; Nurul Fajrih H
Jurnal Peternakan Lingkungan Tropis Vol. 9 No. 2 (2026): Jurnal Peternakan Lingkungan Tropis
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/101yrj21

Abstract

Egg weight is one of the important characteristics of hatching eggs and is commonly used as an initial indicator of egg quality due to its association with nutrient availability for embryonic development. However, hatchability performance is not solely determined by egg weight but is also influenced by various biological and environmental factors during the incubation process. This study aimed to analyze the association between egg weight, hatchability, and hatch weight of Japanese quail (Coturnix japonica). The study was conducted from April to June 2026 at the Laboratory of Animal Production and Animal Product Technology, Faculty of Agriculture, Universitas Mulawarman. A total of 36 Japanese quail eggs were randomly selected and incubated using a semi-automatic incubator maintained at a temperature of 37.5–38°C and relative humidity of 60–70% for 18 days. The observed parameters included pre-incubation egg weight, hatchability, and hatch weight. Data were analyzed using simple linear regression to determine the association between egg weight and hatch weight, and binary logistic regression to evaluate the relationship between egg weight and the probability of successful hatching. The results showed that egg weight was not significantly associated with hatch weight or the probability of successful hatching. These findings indicate that egg weight alone cannot be used as a single predictor of hatching performance in Japanese quail. Other factors, including internal egg quality, embryo characteristics, breeder-related factors, and incubation conditions, should be considered in the evaluation of hatching egg quality.
Co-Authors Akhmat Rizkuna Julinda Romauli Manullang Nurul Fajrih H Roosena Yusuf, Roosena