Investigation of factors affecting annual milk yield of different goat breeds using panel data analysis
Esra Yavuz
TL;DR
This study examines how factors like age and lactation length affect milk yield in five goat breeds in Turkey using panel data analysis.
Contribution
The study demonstrates the effectiveness of panel data analysis in evaluating milk yield variability across goat breeds.
Findings
Age and lactation period positively and significantly affect milk yield.
Çukurova goats showed the highest milk yield, while Toros goats had the lowest.
Panel data analysis proved effective for analyzing productivity in goat breeding.
Abstract
This study aims to evaluate the effects of basic biological factors such as age and lactation length on milk yield by examining the annual milk yield data of five different goat breeds (Damaskus, Pure Damaskus, Toros, Çukurova, and German Fawn) raised in Turkey between 1991 and 1997. The study used a panel data analysis method that takes into account both horizontal (between races) and vertical (within time) variability. It includes annual milk yield (liters), lactation period (days), and age (years) variables of randomly selected individuals from each race. Fixed effects and random effects models were compared in the statistical analysis, and the fixed effects model was preferred according to the Hausman test results. The findings revealed that both age and lactation period had positive and statistically significant effects on milk yield. In addition, significant differences were found…
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Taxonomy
TopicsGenetic and phenotypic traits in livestock · Milk Quality and Mastitis in Dairy Cows · Sustainable Agricultural Systems Analysis