Relationship between insulin-like growth factor-1 (IGF-1) concentrations and body trait measurements and climatic factors in prepubertal goat kids

• Main Author: E. Pehlivan
• Format: Article
• Language: English
• Published: Copernicus Publications 2019-05-01
• Series: Archives Animal Breeding
• Online Access: https://www.arch-anim-breed.net/62/241/2019/aab-62-241-2019.pdf
• ISSN: 0003-9438; 2363-9822

<p>This study aimed to investigate relations between insulin-like growth factor-1 (IGF-1) concentrations and some body trait measurements (body weight, withers height, rump height, body length, chest depth, chest width, chest girth and cannon bone circumference) and climatic factors in prepubertal male and female White (75&thinsp;% Saanen and 25&thinsp;% Kilis goat) and Angora goat kids. For this purpose, blood samples were regularly taken from the vena jugularis, and body trait measurements were regularly carried out (every 15&thinsp;d for 5 months) on each kid. The IGF-1 analysis on the blood serum was performed using the enzyme immunoassay (EIA) method. Climatic values and the length of the photoperiod were obtained from the Turkish State Meteorological Service for the experimental period, and the temperature–humidity index (THI) was calculated using these values. Statistical analysis showed that the IGF-1 concentrations were higher (<span class="inline-formula"><i>P</i>&lt;0.05</span>) in female White goat kids. Furthermore, differences in IGF-1 concentrations were found (<span class="inline-formula"><i>P</i>&lt;0.05</span>) between periods and between the gender groups for both the White and the Angora goat kids. Moreover, the difference between the IGF-1 concentrations between genders was higher (<span class="inline-formula"><i>P</i>&lt;0.05</span>) in White goat kids. Additionally, positive and significant correlations were found between IGF-1 concentrations and some body trait measurements in prepubertal kids, except for in female White goat kids. In summary, it was found that there was a significant relationship between IGF-1 concentrations and growth characteristics of the goat kids. Furthermore, IGF-1 concentrations in the goat kids were significantly influenced by climatic factors such as photoperiod, temperature and the temperature–humidity index, with the release of IGF-1 increasing due to increases in the photoperiod and the environmental temperature.</p>