(18.207.102.38)
Users online: 997    [ij] [ij] [ij] 
Email id
 

Journal of Animal Research
Year : 2017, Volume : 7, Issue : 6
First page : ( 983) Last page : ( 991)
Print ISSN : 2249-5290. Online ISSN : 2277-940X.
Article DOI : 10.5958/2277-940X.2017.00149.8

Changes in Livestock Weather Security Index (Temperature Humidity Index, THI) During the Period 1917–2016 in Veracruz, Mexico

Domínguez-Mancera Belisario1,*, Hernández-Beltrán Antonio2, Rodríguez-Andrade Araceli3, Cervantes-Acosta Patricia4, Barrientos-Morales Manuel5, Pinos-Rodriguez Juan Manuel6

1Laboratory of Cell Biology, School of Veterinary Medicine and Animal Science, University of Veracruzana, Veracruz, Mexico

2Laboratory of Functional Alterations, School of Veterinary Medicine and Animal Science, University of Veracruzana, Veracruz, Mexico

3Department of Chemistry and Biochemistry, Veracruz Institute of Technology, Mexico

4Laboratory of Molecular Biology, School of Veterinary Medicine and Animal Science, University of Veracruzana, Veracruz, Mexico

5Laboratory of Animal Reproduction Biology, School of Veterinary Medicine and Animal Science, University of Veracruzana, Veracruz, Mexico

6Laboratory of Animal Nutrition, School of Veterinary Medicine and Animal Science, University of Veracruzana, Veracruz, Mexico

*Corresponding author: B Domínguez-Mancera; Email: beldominguez@uv.mx

Online published on 23 October, 2018.

Abstract

In Veracruz, raising livestock takes place in an environment that offers little comfort, and this condition has worsened since 1990. Projections of climate change scenarios for Veracruz, Mexico, show increases in temperature; central Veracruz will be the most affected. Analysis of daily temperatures (ºC) and relative humidity (%) for the period 1917–2016 was carried out to obtain the Livestock Weather Security Index (LWSI) using the Temperature and Humidity Index (THI) provided by the forecast center of the Gulf of Mexico and to determine changes in THI. Cattle comfort was obtained with the equation: THI = 1.8 × T + 32-(0.55–0.55 × HR) × (1.8 × T-26); Where “T” is temperature (°C) and “RH” relative humidity (%). THI values were interpreted as ≤ 74 Comfort, 75–78 Alert, 79–83 Dangerous and ≥ 84 Emergency. Periods of 30 years known as Normal I: (1917–1930), II: (1931–1960), III: (1961–1990), IV: (1991–2016) were made. THI means in the time periods were (I) 75.15 ± 0.061, (II) 75.80 ± 0.041, (III) 75.55 ± 0.044, and (IV) 76.62 ± 0.049 (p < 0.05). Percentage (%) of days for THI categories in each Normal was (I) 34.15, 46.69, 19.14, 0.0; (II) 30.84, 42.13, 27.01, 0.0; (III) 32.53, 39.67, 27.78, 0.009; (IV) 27.54, 34.10, 38.17, 0.17 for Comfort, Alert, Dangerous and Emergency (p < 0.05). Comfort has been reduced in recent years; increases in the percentage of days with THI > 79 are expected.

Top

Keywords

Livestock comfort index, heat stress, climate change.

Top

  
║ Site map ║ Privacy Policy ║ Copyright ║ Terms & Conditions ║ Page Rank Tool
451,666,953 visitor(s) since 30th May, 2005.
All rights reserved. Site designed and maintained by DIVA ENTERPRISES PVT. LTD..
Note: Please use Internet Explorer (6.0 or above). Some functionalities may not work in other browsers.