Reproductive Performance in Karadi and Awassi Sheep

ISBN-13: 9786138967149 / Angielski / Miękka / 60 str.

Hawar M. Zebari

Opis

Poor reproductive efficiency is considered one of the main causes of declining sheep production in sheep raised under traditional farm conditions. Four hundred sheep (200 Karadi and 200 Awassi) were used in this study. Of each breed 100 ewes were allowed to come in estrus spontaneously and other 100 ewes were synchronized using intravaginal sponges. Ewes were injected with intramuscular injection of 500 IU of PMSG when sponges were removed at 14 days. This study revealed that breed had significantly effect on twining rate and lamb mortality rate in spontaneous ewes. Breed also had a significant effect on the rate of lambing, lamb mortality, abortion and dystocia in synchronized ewes. In addition, parity had a significant effect on the rate of lambing, lamb mortality and dystocia in spontaneous ewes. Furthermore, parity also had significantly effect on the rate of lambing, lamb mortality, dystocia and barrenness in synchronized ewes. Different ram to ewe ratio during estrus period had a significant effect on conception rate and barrenness rate in synchronized ewes.

O autorze

Zebari, Hawar M.Dr. Hawar Mikahil Hassan Zebari. Department of Animal Production, College of Agricultural Engineering Science,University of Duhok, Kurdistan Region, Iraq. BSc in Animal Production 2005, MSc in Animal Physiology 2011 and PhD in Animal Physiology and Behavior in 2019. Research Interests in Animal physiology, Reproduction, Dairy cattle and Behavior