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The newest intercourse ratio submitted for the over step one one hundred thousand lambs from a keen Awassi head in the Lebanon try forty eight

Friday, October 28th 2022.

The newest intercourse ratio submitted for the over step one one hundred thousand lambs from a keen Awassi head in the Lebanon try forty eight

During the an experimental flock when you look at the Leba­non, oestrus achieved the level which have normal time periods into the August and you can Septem­ber however, had been maintained towards a pretty advanced up to December; away from January to help you April the fresh heating markedly decreased from inside the number, and you will out-of Get in order to July they stopped entirely. The length of the newest oestrus stage ranged anywhere between 15 and you will 20 months, having normally 18 days. The length of heats varied out-of sixteen to 59 circumstances, that have 31 times an average of. Nine for every single­penny of the heating was silent, since manifested from the occurrence away from mul­tiple cycles, accompanied by the new ab­sence out-of mating response (Barr, 1968). The latest Awassi ewe displays couple outward signs of oestrus. Pro-oestrus is actually small and you may as an alternative indefinite plus the onset of oestrus abrupt, given that cessation was progressive. Inside Iraq, the main lamb­ing year off Awassi ewes is during No­vember, and in Lebanon, the fresh Syrian Arab Republic and Israel when you look at the Decem­ber-January.

New imply gestation period during the a keen Awassi flock for the Lebanon keeps come considered 149.five days to own male lambs and 148.six days for females (Choueiri, Barr and you can Khalil, 1966). In another Lebanese flock, the typical pregnancy size to own solitary-produced lambs are 151.2 days (Fox ainsi que al., 1971) if you’re, in the Western College or university Ranch in the Lebanon, it absolutely was discovered to be 152.six weeks (McLeroy and you can Kurdian, 1958).

Inside the Bedouin and you can fellahin Awassi flocks, only 5 per cent of your adult ewes has actually twins. Into the Lebanon, the new lambing portion of mature Awassi breeding ewes usually averages on 60. In Syrian Awassi flocks, fertility is also lowest – 70-80 lambs for each and every one hundred ewes. For the fresh flocks that have premium feeding and you can repair, highest lambing pricing (110-120) was filed. The twinning rate out-of Awassi ewes can boost up to the age of half dozen age and decrease afterwards.

3 boys in order to 51.7 people. Inside a stationary flock purchased out-of Syrian nomads, what amount of people surpassed that lady; when you look at the solitary lambs it actually was 52.4:47.six as well as in twins 57.4:42.six. 3:fifty.7; twenty-two.8 percent of your own dual pairs were out-of men, 24.6 per­penny away from females, and you will 52.six % of one another genders.

In a group away from Anatolian Awassi sheep, the entire sex proportion of men so you can ladies single and you may dual lambs are 49

The newest suggestions out-of barrenness show a wide range in various flocks. Into the a Lebanese head where the ewes were accompanied by rams from June to January, there are merely 4 per cent barren ewes. For the a huge head, ob­tained out-of half dozen different countries during the Lebanon, 10 percent of one’s ewes hence came into temperatures didn’t lamb, between dos percent so you can 26 per cent certainly one of local organizations. From inside the a stationary flock where the rams was indeed leftover with the ewes year round, 14 % don’t lamb through the just one year. During the Egypt, 20 percent from several Awassi ewes derived from Syrian stock didn’t conceiveputer records of all the milk-registered Awassi ewes for the Israel during one or two consecutive decades tell you a keen mediocre barrenness out of forty.7 % during the yearlings, 10.5 percent in two-year-olds, and 6.25 percent in the mature ewes.

Inside the an enthusiastic Awassi head in main Anatolia, 20 percent of your own ewes mated in a single seasons and you will a dozen per cent mated in another seasons stayed barren

The brand new death price in the Bedouin and you will fellahin Awassi flocks was 15-20 each­cent into the regular decades, and up so you can 50 percent in years out of drought or severe winters (Hirsch, 1933). While this identifies flocks total, the new mor­tality away from lambs is certainly not lower than compared to adult sheep. Inside Syrian Awassi flocks belonging to the Sleep­ouin, brand new death regarding lambs just after beginning is at 5-10 % inside favourable ages, and 31-50 percent in years that have cool winter seasons and accumulated snow-covered grasslands, when the ewes is actually starved. When you look at the fellahin flocks, kept in villages where in actuality the ewes mutton during the expert­tected cities and are also provided specific straw plus pasture, mutton mortality try lower than in Bedouin flocks. In the Iraq, famine and you may condition is actually reckoned to reduce the common mutton crop so you can forty-sixty percent (Williamson, 1949). During the an old boyfriend­perimental Awassi head in the Iraq, where nourishment and you can management of the brand new sheep are a lot better than those commonly used in Bedouin and you will fellahin flocks, unmarried lambs shown an average death rate from per cent and you will twins 18.0 per­cent while in the a half a dozen-season months. You will find a broad interest in Awassi flocks getting men lambs to own a substantially highest death rates when you look at the first month away from lifetime than for women lambs. Within the countries where Awassi is not local however, has been imported from inside the relatively quick wide variety, death out of lambs during the period of acclimati­zation inside yet another microbial environment is normally higher.

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