0000000000326686

AUTHOR

Ignacy Misztal

showing 2 related works from this author

Effect of heat stress on production of Mediterranean dairy sheep.

2005

A study on heat stress in Mediterranean dairy sheep was undertaken with the objective to examine the relationship between milk production and heat stress, to estimate the additive genetic variances of milk production traits and heat tolerance, and to investigate the possibility of future selection for increased heat tolerance. Production data included 59,661 test-day records belonging to 6624 lactations of 4428 lactating ewes from 17 flocks collected from 1994 through 2003. The traits investigated were daily milk yield, fat and protein percentage, and daily yield of fat-plus-protein. The pedigree file consisted of 5306 animals; in addition to the 4428 animals with records, 188 male and 690 …

Mediterranean climateHeat indexYield (engineering)Hot TemperatureSheepHumiditySheep DiseasesRepeatabilityBiologyHeat Stress DisordersMilk ProteinsLipidsWeather stationAnimal scienceMilkGeneticsAnimalsLactationAnimal Science and ZoologyFemaleFlockGene–environment interactionSelection GeneticFood ScienceJournal of dairy science
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Effect of heat stress on production in Mediterranean dairy sheep

2005

European Mediterranean countries are characterized by exposure to considerable heat between three and six months annually. High ambient temperature, solar radiation, wind speed and relative humidity, cause the effective temperature of the environment to be above the thermo-neutral zone of the animals (5 to 25ºC; McDowell, 1972) and therefore heat stress occurs (Bianca, 1962).

Mediterranean climateHeat toleranceheat tolerance temperature-humidity index (THI) dairy sheepEnvironmental scienceAnimal Science and ZoologyRelative humiditylcsh:Animal cultureAtmospheric sciencesWind speedHeat stresslcsh:SF1-1100Italian Journal of Animal Science
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