The potential effect of temperature-humidity index on productive and reproductive performance of buffaloes with different genotypes under hot conditions

Abstract The objective is to study the effect of heat stress on milk yield (MY) relative to milking records (n=18178) of native Holsteins (n=187), in the region of Ghardaia, according to periods of HS, using the temperature-humidity index (THI). With THI >72 during 07 months in the study area, which significantly (P<0.001) decrease the MY (-15.5% corresponding to 21.73 kg). Also, calving periods led to a significant drop (P < 0.001) in overall MY (7030.35 kg) of the order of (-14.6%), and over the lactation length (353.43 d), which explains 41% of the variations in MY. In addition, the non-significant effect (P=0.212) of the lactation range on the increase in MY, moreover, the lactation length shows a non-significant (P = 0.108) decrease (-4.68%) during heat stress (HS). Furthermore, the significant effect (P <0.001) of the interaction (Milking frequency × THI) on MY, when THI variates from < 74 to > 84, with regression of (-16.82% and -08.82%) of the MF (2X and 3X), respectively. Again, the NH cow is less sensitive to hyperthermia, so THI explains only 2% of the variation in MY levels. Thus, NH in arid regions have the ability to acclimatize to Saharan environmental conditions.

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Effect of temperature humidity index on sexual behavior and semen quality in Barbari buck under Indian climatic condition

Small Ruminant Research ◽

10.1016/j.smallrumres.2020.106263 ◽

2020 ◽

Vol 193 ◽

pp. 106263

Author(s):

R. Ranjan ◽

P. Singh ◽

S.D. Kharche ◽

C. Gangwar ◽

N. Ramachandran ◽

...

Keyword(s):

Sexual Behavior ◽

Climatic Condition ◽

Semen Quality ◽

Effect Of Temperature ◽

Temperature Humidity Index ◽

Indian Climatic ◽

Humidity Index ◽

Indian Climatic Condition

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Variations in the Temperature-Humidity Index and Dorsal Fat Thickness during the Last Trimester of Gestation and Early Postpartum Period Affect Fertility of Bos indicus Cows in the Tropics

Veterinary Medicine International ◽

10.1155/2018/2360430 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Ramiro F. Díaz ◽

Carlos S. Galina ◽

Sandra Estrada ◽

Felipe Montiel ◽

Gloriana Castillo ◽

...

Keyword(s):

Reproductive Performance ◽

Postpartum Period ◽

Bos Indicus ◽

Early Postpartum Period ◽

Temperature Humidity Index ◽

Early Postpartum ◽

Humidity Measurements ◽

Humidity Index ◽

Fat Thickness ◽

Relative Change

In order to measure the influence of the temperature-humidity index (THI) and the variation of fat thickness on reproductive performance, ninety-two Bos indicus cows kept under grazing conditions were used in two farms in Veracruz (Mexico) and Puntarenas (Costa Rica). THI was calculated with the average environmental temperature and relative humidity. Measurements of fat thickness (FAT) were taken two weeks apart from the last trimester of gestation to approximately 80 days postpartum (dpp). Natural breeding was used in both farms. Time to conception was calculated based on the interval from days at risk to conception (DRC), which had to be at least 28 dpp. THI was between 65.4±2.9 and 73.2±1.5 in Veracruz and 75.4±0.26 and 76.5±0.55 in Puntarenas. Variations in THI were observed in Puntarenas whereas in Veracruz THI variations were more prominent. In Veracruz, loss of fat during the last trimester of gestation was on average 8.5%, whereas in the postpartum period it was 18.4% (P = 0.042). In Puntarenas, the variation in the last trimester of gestation was on average 18.7% and in the postpartum period was 10.5% (P = 0.012). The relative change in FAT in Veracruz was 36.7%, and in Puntarenas it was 29.3%. Overall, 60% of the cows became pregnant. FAT decreased the interval of DRC (R2=0.06; P=0.033) with a high relationship (R2=0.76; P< 0.0001) between THI and time to conception, in both farms. In conclusion, THI levels influence the reproductive performance in early postpartum period affecting DRC.

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