No abstract

The objective of this study was to compare between measured weather data (2010-2019) and projected data for the same period obtained from three global climate models (HadGEM2-ES, CSIRO-Mk3-6-0, and MIROC5), with its four RCPs scenarios (RCP2.6, RCP4.5, RCP6.0 and RCP8.5) developed for the five agro climatic zones of Egypt and determine the most suitable scenario to be used in each agro-climatic zone for projection of the effect of climate change in the future on the agro-climatic zones of Egypt. Our results revealed that the four climate change scenarios developed from the three models show high level of suitability in the projection of the three studied weather elements. Climate change scenario RCP6.0 and RCP8.5 developed by HadGEM2-ES and CSIRO-Mk3-6-0 attained the highest agreement between measured and projected values of the studied weather elements. Whereas, climate change scenario RCP2.6, RCP6.0 and RCP8.5 developed by MIROC5 attained the highest agreement between measured and projected values of the studied weather elements. Thus, we recommend the use these models in the projection of the effect of climate change in the future in the agro-climatic zones of Egypt.

On the other hand, bucks of G2 exhibited a decrease (P<0.05) in ejaculate volume (29.3 %) as compared to the bucks of T3. Sperm concentration, total sperm output, total motile sperm and semen quality were significantly decreased in the bucks of G2 as compared to the bucks of G1. Sperm motility was decreased (P<0.05) in the bucks of G2 as compared to other groups. Also, bucks of G2 showed significantly increased in dead spermatozoa, sperm abnormalities and hydrogen ion (pH) as compared to other two treatments. Bucks drank saline water (G2) had significant increase in reaction time as compared to the bucks of G1 and G3. However, bucks of G2 had insignificantly decreased testosterone hormone by 36.9 and 32.5 % as compared to the bucks of G1 and G3, respectively. Conclusively, applying alternating water system as a biostimulation method could eliminate the drastic effects of continuous drinking saline well water on reproductive performance of rabbits under new reclaimed lands.