Summer season induced rhythmic alterations in metabolic activities to adapt to heat stress in three indigenous (Osmanabadi, Malabari and Salem Black) goat breeds

作者：Pragna Prathap; Sejian V.^*; Soren N. M.; Bagath M.; Krishnan G.; Beena V.; Devi P. Indira; Bhatta Raghavendra

来源：Biological Rhythm Research, 2018, 49(4): 551-565.

DOI：10.1080/09291016.2017.1386891

• Heat stress
• goat
• thyroid hormones
• metabolic enzyme
• rumen metabolites

A study was conducted to assess the adaptive capability of three indigenous goat breeds to heat stress. Thirty six 10 months to one-year-old female goats of Osmanabadi, Malabari and Salem Black breeds were randomly divided into six groups, OC (n = 6; Osmanabadi control), OHS (n = 6; Osmanabadi heat stress), MC (n = 6; Malabari control), MHS (n = 6; Malabari heat stress), SBC (n = 6; Salem Black control) and SBHS (n = 6; Salem Black heat stress). Among the metabolic activity controlling hormones, the breed factor significantly (P < 0.05) influenced only plasma triiodothyronine (T3). However, heat stress significantly (P < 0.05) decreased thyroid stimulating hormone (TSH) in both MHS and SHS groups while significantly (P < 0.05) decreased the plasma T3 in MHS. The rumen metabolites such as acetate, propionate, butyrate and total volatile fatty acids (TVFAs) showed significant (P < 0.05) variation for both breed and treatment effect. The Salem Black breed did not show any significant variation for most of the rumen metabolites as compared to both Osmanabadi and Malabari breeds for the heat stress treatment. The study indicated the importance of the metabolic alterations in indigenous goat breeds to cope to the seasonal rhythms. The results indicated that on comparative basis, Salem Black breed adapted better to the heat stress challenges.

• 出版日期2018