Out-of-season lambing of Finnish Landrace ewes

Sormunen-Cristian, Riitta; Suvela, Maarit

doi:10.1016/s0921-4488(98)00140-0

Cited by 17 publications

(8 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Brown and Jackson (1995) investigated the seasonal effect on some reproductive parameters of St. Croix sheep, which lambing percentage was lowest for spring breeding, resulting in lower number of lamb born and weaned per ewe exposed and lower litter size and weaning weights per ewe exposed. In our study, the litter size declined by 0.55 lambs between May and September showing a similar sensitivity of the ewes to changes in day length during the breeding season, as reported by Sormunen-Cristian and Suvela (1999). This might be caused by the effect of season correlated with photoperiod on oestrus activity and conception ratio.…”

Section: Resultssupporting

confidence: 88%

“…Prolificacy tended to be higher for ewes bred in favourable season in present study. Similar seasonal effects on litter size were also reported by different researchers (Aboul-Naga et al, 1991;Sormunen-Cristian and Suvela, 1999;Notter, 2000). Brown and Jackson (1995) investigated the seasonal effect on some reproductive parameters of St. Croix sheep, which lambing percentage was lowest for spring breeding, resulting in lower number of lamb born and weaned per ewe exposed and lower litter size and weaning weights per ewe exposed.…”

Section: Resultssupporting

confidence: 68%

“…On the other hand, the other reproductive performance of CAMAL ewes was similar to control group (P>0.05), as calculated based on the number of ewes in groups (fertility2, fecundity2 and lamb survival). This is a contradictory result, as producing a lamb crop every 8 months results in an increase of 33-49% of lambs born per ewe per year (Aboul-Ela et al, 1987;Rawlings et al, 1987;Sormunen-Cristian and Suvela, 1999). Also, Keskin et al (2005) reported higher lambing for Awassi managed under accelerated lambing than those under one lambing in one year.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Reproductive characteristics of Awassi ewes under Cornell alternate month accelerated lambing system

Gül

Keskin

2010

Ital J Animal Sci

View full text Add to dashboard Cite

We investigated the reproductive responses of Awassi ewes under Cornell alternate month accelerated lambing (CAMAL) system. Ewes were randomly allocated to two experimental groups. The first group (control group) consists of 20 ewes exposed to rams in September under conventional management system while the second group (CAMAL) were divided into four sub-flocks contain 20 head of ewes each one were exposed to rams to obtain three lambing in two years with different breeding and lambing months. In CAMAL ewes, oestrus was synchronized using intra-vaginal sponges with progesterone and PMSG administration. Results revealed that within CAMAL group, the percentage of animals in heat, onset of oestrus, litter size, birth weight and weaning weight were affected by mating months. September and November were the most appropriate months for oestrus ratio (97.5 %) and litter size (1.18 and 0.98, respectively). Lambs of control group were heavier at birth and weaning than those of CAMAL group. On the other hand lamb yield was not affected statistically by the CAMAL administration

show abstract

Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 68%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Reproductive characteristics of Awassi ewes under Cornell alternate month accelerated lambing system

Gül

Keskin

2010

Ital J Animal Sci

View full text Add to dashboard Cite

show abstract

“…The end of pregnancy of spring-lambing dams occurred during the best period of the year with regards to pasture and temperature. This result was in agreement with that of Sormunen-Cristian and Suvela [17] who found a significant effect of birth season (spring: March-May; summer: June-August; autumn: SeptemberNovember; and winter: December-February) on lamb birth weight with a conflicting effect for Finnish Landrace and crossbred lambs. Similarly, Notter et al [15] reported that lambs born in the winter (January-February) were the heaviest and weighed more than lambs born in either the autumn (November-January) or spring (March-April).…”

Section: Lamb Weights and Survivalsupporting

confidence: 92%

“…This is mainly a result of a poorer pasture and hot temperature during the summer. Sormunen-Cristian and Suvela [17] found that mortality from birth to 150 days of Finnsheep and crossbred lambs born in the spring, summer, autumn and winter was 17.7%, 15.1%, 10.8% and 14.0%, respectively. The high mortality occurring in the spring was due to the largest litter size and to insufficient supervision during lambing.…”

Section: Lamb Weights and Survivalmentioning

confidence: 97%

Productivity of Timahdite and D’man × Timahdite ewes lambing in the autumn, spring and summer in Morocco

Boujenane

Cisse

Kansari³

2005

Anim. Res.

View full text Add to dashboard Cite

-The reproductive performance of 1117 Timahdite and D'man × Timahdite (D × T) ewes lambing in the autumn, spring and summer, and weights and survival to 90 days of their 968 lambs were evaluated. All ewes were exposed to Meat Lacaune rams. The lambing rate of Timahdite ewes was 42% lower than that of D × T ewes. The litter size at birth and at 90 days of D × T ewes was 0.23 and 0.19 lamb, respectively greater than those of Timahdite ewes. D × T crossbred ewes weaned 4.1 kg weight more than Timahdite ewes. The lambing rate, litter size at 90 days and litter weight at birth and at 90 days of summer-lambing ewes were 43%, 0.39 lamb, 0.23 kg and 17.7 kg, respectively lower than those of autumn-lambing ewes. They were also 25%, 0.49 lamb, 1.3 kg and 14.6 kg, respectively lower than those of spring-lambing ewes. The dam's genetic group had significant effects on lamb birth weight, but not on weight at 30 days and 90 days and survival. Spring-born lambs had the highest birth weight and survival, and autumn-born lambs had the highest weight at 30 days and 90 days. It was concluded that D × T crossbred ewes had better productivity than Timahdite ewes at any lambing season. Furthermore, flocks that rely on pasture for their nutrition should avoid summer lambing, which results in low ewe and lamb performance.

show abstract

Sheep Milk

and¹,

Wendorff²

2006

Handbook of Milk of Non‐Bovine Mammals

View full text Add to dashboard Cite

Out-of-season lambing of Finnish Landrace ewes

Cited by 17 publications

References 18 publications

Reproductive characteristics of Awassi ewes under Cornell alternate month accelerated lambing system

Reproductive characteristics of Awassi ewes under Cornell alternate month accelerated lambing system

Productivity of Timahdite and D’man × Timahdite ewes lambing in the autumn, spring and summer in Morocco

Sheep Milk

Contact Info

Product

Resources

About