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Productive performance of sheep under intensification program using a twice yearly lambing schedule Putu, I. Gede
Indonesian Journal of Animal and Veterinary Sciences Vol 1, No 1 (1995)
Publisher : Indonesian Animal Sciences Society

A total of 350, three to four year old Daldale ewes were allocated into two treatment groups balanced for age and liveweight. Group TY was joined twice yearly (April-May and September-October) and group OY was joined once yearly (April-May). Three percent of fertile rams fitted with ewe marking crayons and harnesses were used in each group during the six weeks joining period. The productive performance were recorded during three years period. The average raddling rate, lambing rate and number of lambs born per ewe in the TY group were signicantly higher than those of the OY group (P<0.05). However, birth weight, weaning weight and pre-weaning growth rate of the lambs born from the TY group were significantly lighter than those of the OY group (P<0.05). There was no significant difference on wool production between the TY and OY groups (P>0.05). Total weaning weight of lambs horn from both the TY and OY groups for the first, second and third year of research were 2.29 vs 2.49 tons, 2.50 vs 2.63 tons and 1.43 vs 2.34 tons, respectively. It was concluded that the Daldale ewes showed a high proportion of oestrual activity in all year round indicating their suitability for the use in the intensification of sheep husbandry. However, the twice yearly lambing program is still need further research particlularly in selecting breed and other supporting factors. Â Key words : Sheep, productive intensification, twice yearly lambing

Reproductive wastage analysis of Daldale ewes using a twice yearly lambing program Putu, I. Gede
Indonesian Journal of Animal and Veterinary Sciences Vol 1, No 2 (1995)
Publisher : Indonesian Animal Sciences Society

Reproductive wastage analysis of intensification sheep farming system using a twice yearly lambing program was carried out using Daldale ewes . Study was focused on ewes which completed a three-year study and alloted into 96 ewes involved in a twice-yearly lambing program (TY) and 105 ewes involved in once-yearly lambing program (OY) . Results indicated that 44 ewes (45 .8%) and 32 ewes (33 .3%) out of 96 ewes in TY group mated four and five times, respectively during five consecutive mating opportunities . However, those mating frequencies were not associated with increasing number of lambs bom per ewe raddled . It was due mainly to high percentage of ewes failed to mate after parturition, fertilization failure and embryonic mortality which were indicated by low percentage of mated ewes giving birth . It can be concluded that twice-yearly lambing program still needs further study particlularly in using different breed . Another alternative which needs to be studied is the use of a three lambing program in two years period at which the ewes have more chances to prepare their physical and physiological conditions before the next pregnancy . Key words : Reproductive wastage, sheep, lambing program

Productive performance of sheep under intensification program using a twice yearly lambing schedule I. Gede Putu
Jurnal Ilmu Ternak dan Veteriner Vol 1, No 1 (1995)
Publisher : Indonesian Center for Animal Research and Development (ICARD)

A total of 350, three to four year old Daldale ewes were allocated into two treatment groups balanced for age and liveweight. Group TY was joined twice yearly (April-May and September-October) and group OY was joined once yearly (April-May). Three percent of fertile rams fitted with ewe marking crayons and harnesses were used in each group during the six weeks joining period. The productive performance were recorded during three years period. The average raddling rate, lambing rate and number of lambs born per ewe in the TY group were signicantly higher than those of the OY group (P<0.05). However, birth weight, weaning weight and pre-weaning growth rate of the lambs born from the TY group were significantly lighter than those of the OY group (P<0.05). There was no significant difference on wool production between the TY and OY groups (P>0.05). Total weaning weight of lambs horn from both the TY and OY groups for the first, second and third year of research were 2.29 vs 2.49 tons, 2.50 vs 2.63 tons and 1.43 vs 2.34 tons, respectively. It was concluded that the Daldale ewes showed a high proportion of oestrual activity in all year round indicating their suitability for the use in the intensification of sheep husbandry. However, the twice yearly lambing program is still need further research particlularly in selecting breed and other supporting factors.

Reproductive wastage analysis of Daldale ewes using a twice yearly lambing program I. Gede Putu
Jurnal Ilmu Ternak dan Veteriner Vol 1, No 2 (1995)
Publisher : Indonesian Center for Animal Research and Development (ICARD)

Reproductive wastage analysis of intensification sheep farming system using a twice yearly lambing program was carried out using Daldale ewes . Study was focused on ewes which completed a three-year study and alloted into 96 ewes involved in a twice-yearly lambing program (TY) and 105 ewes involved in once-yearly lambing program (OY) . Results indicated that 44 ewes (45 .8%) and 32 ewes (33 .3%) out of 96 ewes in TY group mated four and five times, respectively during five consecutive mating opportunities . However, those mating frequencies were not associated with increasing number of lambs bom per ewe raddled . It was due mainly to high percentage of ewes failed to mate after parturition, fertilization failure and embryonic mortality which were indicated by low percentage of mated ewes giving birth . It can be concluded that twice-yearly lambing program still needs further study particlularly in using different breed . Another alternative which needs to be studied is the use of a three lambing program in two years period at which the ewes have more chances to prepare their physical and physiological conditions before the next pregnancy

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