A Study on Early Growth and Morphometric Parameters in Sirohi Goat Kids Born in Different Seasons

Abstract

Body weight in goats is a key parameter that plays a vital role in selection, feeding management, and overall health care. Thus, the present study was conducted under the Rastriya Krishi Vikas Yojana (RKVY) project at the Sirohi Goat Research Unit, S.K.N. College of Agriculture, SKNAU, Jobner, Jaipur district, Rajasthan, India. The objective was to assess the effect of birth season (autumn vs. winter) on early growth and morphometric traits of Sirohi goat kids. A total of 40 kids were monitored from birth to three months of age. Parameters recorded included body weight, body length, height at withers, heart girth, and paunch girth at birth, and at 30-day intervals up to 90 days. Statistical analysis was carried out using one-way ANOVA to evaluate the effect of birth season (autumn and winter) on body weight and morphometric traits (body length, heart girth, paunch girth, and body height) of Sirohi goat kids at different ages (Day 1, 1 month, 2 months, and 3 months). Results showed no statistically significant differences in body weight across seasons at any age point, although winter-born kids had slightly higher average weights. Heart girth and paunch girth followed a similar non-significant trend. However, body length at three months was significantly greater in winter-born kids (P=0.01), suggesting a seasonal influence on linear growth. Body height remained consistent between groups. These findings indicate that birth season had minimal impact on most growth parameters, likely due to overlapping environmental conditions as kids matured. The study had limitations such as a small sample size (n=40), analysis of only two seasons, and unaccounted genetic differences. Still, results indicate minimal seasonal impact on growth, supporting year-round breeding. Future studies should use larger samples, cover all seasons, and consider environmental and non-genetic factors.