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Influence Of Season On Stereological And Histomorphometric Characteristics Of Testes Of Ouled Djellal Rams In Algeria, Yamina Belkhiri, Souheyla Benbia, Amal Djaout
Influence Of Season On Stereological And Histomorphometric Characteristics Of Testes Of Ouled Djellal Rams In Algeria, Yamina Belkhiri, Souheyla Benbia, Amal Djaout
The Thai Journal of Veterinary Medicine
The aim of this study was to investigate the influence of season on testicular morphometry, on ram body weight, testosterone concentration and on stereological structure of the testes in Ouled Djellalrams. Twenty seven rams were randomly selected and the live weight and testicular size were recorded. At the beginning of each season (autumn, winter, spring), among the study group, three rams were randomly selected, slaughtered and their left testes were removed and weighed. For microscopic study, tissue samples were excised from the left testes, fixed in formalin solution and embedded in paraffin and, afterwards, quantitative evaluation was performed. Statistical analysis …
An Analysis Of A Herd-Based Lactation Curve Reveals The Seasonal Effect From Dairy Cows Fed Under High Ambient Temperatures, Sumpun Thammacharoen, Somchai Chanpongsang, Narongsak Chaiyabutr, Supattra Teedee, Attapol Pornprapai, Aemwika Insam-Ang, Channarong Srisa-Ard, Niran Channacoop
An Analysis Of A Herd-Based Lactation Curve Reveals The Seasonal Effect From Dairy Cows Fed Under High Ambient Temperatures, Sumpun Thammacharoen, Somchai Chanpongsang, Narongsak Chaiyabutr, Supattra Teedee, Attapol Pornprapai, Aemwika Insam-Ang, Channarong Srisa-Ard, Niran Channacoop
The Thai Journal of Veterinary Medicine
The presentinvestigation was carried out to demonstratethe effect of high ambient temperature (HTa) on lactation performance with herd-based measurement. One large dairy farm in Thailandwith more than 300crossbred Holstein cows milking each monthwas selected. The meteorological data was recorded once a week during the period of observation. Milking cows (n=90) were observed for a 10-month lactation curve based on their calving seasons: Summer, rainy and winter. The lactation curve was fitted by nonlinear regression using the reduced lactation persistency model.The climatic conditions revealed a high degree of temperature and humidity index (THI). The average THI throughout the year was 84.8 …