The difference between springtime unmarried and you may twin beginning, raised away from 0

Total, the real difference in increases ranging from men and women is dependent on conformation and you can metabolic rate; according to Benevent mais aussi al (1971) per gender evolves under the command over its own endocrine equilibrium, which produces an even more otherwise a reduced essential growth of areas.

Effect of the latest beginning style of

Regardless the entire year, solitary delivery lambs were usually heavier than just twin long lasting many years since the expressed by the imply weight of each birth types of (Figure 5). 78 kilogram within birth to a single.50 kilogram in the ninety days, while inside the trip the difference faster pronounced at the delivery 0.33 kg, risen up to 1.38 kilogram in the ninety days. Such results have been consistent with that from multiple authors (Afolayan mais aussi al 2006; Ekiz and you can Altinel 2006; Kuchtik and you may Dobes 2006; Merghem age tal 2011 and Yilmaz and Altin 2011).

The real difference from the mediocre each and every day acquire (Profile 6) between spring solitary and you can dual birth decreased regarding 36.7 grams/d at the 0-one month to help you twenty-two.2 g/d within sixty-ninety days, while the real difference fell out of grams/d so you can 15.4 grams/d during trip at the same age bracket. As the timely reduced amount of its average day-after-day obtain, unmarried delivery mediocre daily acquire remained more than dual average each and every day obtain all over the several months between 0 in order to ninety days. Given that shown inside data, superiority out of unmarried more double birth lambs could have been said by (Dekhili and Mahnane 2004 and you can Boussena et al 2013). Predicated on Theriez (1991), the bad results of litter proportions and lamb progress are extremely of time allotted to a decrease in the quantity of whole milk offered per lamb.

Effectation of the brand new mom’s ages

Regardless of the 12 months, efficiency indicated that the greatest lamb’s loads had been mainly associated with next generation “3 to 6 decades” with the 3rd class “6 so you’re able to nine years”. Through the spring the average lambs’ loads had been ten.6 kg into 2nd age bracket and ten.dos kilogram with the third age bracket and you will respectively 9.99 kilogram and you will 9.twenty-four kg during the fall (Shape seven and 8). That it searching for was at arrangement that have the ones from (VanWyk mais aussi al 1993 and you may Este Fadili 2008) just who exhibited the key determine of the mother’s ages into the lamb’s pounds, in addition, all of our show indicated that lamb’s progress has also been influenced by ewes ages (Figure 9 and you will ten).

The results of the analysis of variance showed that differences between age groups were highly significant (p < 0.01). Examination of the means (Table 1) resulted in 4 groups (A, B, C, and D) highly different (p < 0. 01) according toTukey and Newman-keuls tests.

The first group A, birthing lambs with the highest weight included ewes aged from 3 to 9 years, regardless the season. Group C was mostly related to the age group less or equal to 3 years, whereas the lowest weights were always related to the age group more than 9 years. Indeed, this finding was also mentioned by Chopra and Acharya (1971) who showed that the intermediate age generally, gives birth to more vigorous lambs, whereas younger and older ewes give lighter lambs. The differences in lamb’s weight are explained by the fact that younger ewes (< 3 years) are still growing with bodies still developing, which leads them to share nutrients with their lambs, whereas ewes between 3 to 9 years have reached full growth and thus the lambs are provided with enough quantitative and qualitative nutrients. It should be also noted that the increasing growth in lambs' weight was related to the maternal behaviour; so lambs born from mothers aged of 3 to 9 years, which have already given several births, were much better supported than those born from first furrowing mothers aged less than 3 years. Allouche et al (2011) found similar results as ours for the same breed.

Laisser un commentaire

Votre adresse e-mail ne sera pas publiée. Les champs obligatoires sont indiqués avec *