Impact of bioclimatic factors on physio-biochemical and molecular response of slow-growing poultry reared in tropics

Abstract Most of the climatic studies projected on heat stress have considered heat extremes, but not the humidity. Hence, this work was carried out to evaluate thermotolerance, production performance, physio-biochemical and immunological response of slow-growing poultry towards various temperature-...
Ausführliche Beschreibung

Abstract Most of the climatic studies projected on heat stress have considered heat extremes, but not the humidity. Hence, this work was carried out to evaluate thermotolerance, production performance, physio-biochemical and immunological response of slow-growing poultry towards various temperature-humidity levels in coastal climate. A total of 240 straight run CARI-Debendra birds were reared in three groups based on temperature-humidity indices (THI > 80, = 75–80 and < 75). Significant difference (P < 0.01) in rectal and body surface temperatures was observed among treatment groups. Lowest body weight was observed in THI > 80 group as 1.45 kg at 12 weeks. There was no significant difference in feed intake and FCR; however, total water intake had increased in heat-stressed group. Birds under THI > 80 group had significantly low gizzard weight only at the 12th week compared to other groups. Significant differences (P < 0.05) in relative weight and length of intestine were noticed which was comparable between seasonal control and THI > 80 group but lower than THI < 75 group at the 6th week. However, at the 12th week, intestinal weight varied among the groups (P = 0.08), but intestinal size did not differ. Among immune organs, significant difference (P < 0.05) was noted only in weight of thymus. Except $ Cl^{−} $, other biochemical indices such as cholesterol, lactate dehydrogenase, creatinine kinase, $ K^{+} $ and $ Na^{+} $ did not differ among treatment groups. Relative expression of HSP70 gene was differed significantly (P < 0.01) in the liver, intestine and breast muscles under different THI. The changes reported in seasonal control group during month of October to December revealed better thermotolerance capacity and adaptability of CARI-Debendra birds to coastal hot-humid climate. However, response of this breed to heat stress (THI > 80) reported decrease in growth, immune response and mineral balance attributable to heat loss efficacy in high humidity. Ausführliche Beschreibung

Autor*in:	Nayak, Nibedita [verfasserIn] Bhanja, Subrat Kumar Chakurkar, Eaknath B. Sahu, Amiya Ranjan Ashitha, K. Shivasharanappa, N. D’Mello, Atasha Delia

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	Thermotolerance Slow-growing poultry Temperature-humidity indices Heat stress Climate change

Anmerkung:

© The Author(s), under exclusive licence to Springer Nature B.V. 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Übergeordnetes Werk:	Enthalten in: Tropical animal health and production - Dordrecht [u.a.] : Springer Science + Business Media B.V, 1969, 55(2023), 4 vom: 29. Juni
Übergeordnetes Werk:	volume:55 ; year:2023 ; number:4 ; day:29 ; month:06

Links:	Volltext

DOI / URN:	10.1007/s11250-023-03668-3

Katalog-ID:	SPR052094928