scholarly journals THE EFFECT OF DIFFERENT LEVELS OF DRY SEASON SUPPLEMENTARY FEEDING ON THE REPRODUCTIVE PERFORMANCE OF YANKASA SHEEP IN A TWICE-YEARLY LAMBING PROGRAMME

2021 ◽  
Vol 14 ◽  
pp. 41-49
Author(s):  
O. A. Osinowo ◽  
M. S. Doma ◽  
N. Pathiraja ◽  
V. Buvanendran
Keyword(s):  
Birth Weight ◽  
Litter Size ◽  
Reproductive Performance ◽  
Post Partum ◽  
Dry Season ◽  
Supplementary Feeding ◽  
Northern Nigeria ◽  
Consistent Increase ◽  
Different Levels

Ninety-four pregnant Yankasa ewes were divided into 3 groups and fed;(1) 0, (2) 200 or (3) 400 g/head/day of a concentrate supplement in addition to 6 h grazing daily, from 35.9±2.0 days before, to 98. 122.0 days after lambing in the dry season between 2 Jan vary and 15 May 1984 in Zaria, Northern Nigeria. There were no significant differences (P>0.05) bet den groups in litter size and adjusted birth weight in the initial lambing 35.9±2.0 days into the experiment although the latter showed consistent increase with level of supplementation. Adjusted 90-day Weaning weights increased significantly (P<0.05) with each increase in level of supplementation: 5:5, 7.1 and 8.6kg for groups 1, 2 and 3 respectively. Correspondingly, the percentage of lambs weaned increased (48.6, 56.4 and 90.7%) while ewe mortality declined (12.9, 10.0 and 3.0%) with increasing level of supplementation, The percentage of ewes exhibiting oestrus within 98.1±2.0 days postpartum increased with level of supplementation: 77,8,91.3 and 96.8% for groups 1, 2 and 3 respectively. However, of the ewes showing oestrus, there were no significant differences between groups in post-partum intervals to oestrus and conception. Litter size from matings during the experiment showed non-significant increase with level of supplementation. It is concluded that dry season supplementary feeding is essential for optimum reproductive performance of Yankasa sheep in a twice-yearly lambing programme. 

scholarly journals Effects of cooling on the reproductive performance of gilts

2016 ◽  
Vol 20 (2) ◽  
pp. 357-361
Author(s):  
J.O. Oyedeji ◽  
G.O. Imagbenikaro
Keyword(s):  
Birth Weight ◽  
Litter Size ◽  
Reproductive Performance ◽  
Feed Intake ◽  
Cooling System ◽  
Large White ◽  
Feed Cost ◽  
Randomized Design ◽  
Significant Difference ◽  
Level Of Significance

The study examined the effect of cooling on the reproductive performance of gilts using 27 Large White Experimental Gilts on a Completely Randomized Design (CRD) with 3 systems of cooling, namely Wallow Cooling (WC), Sprinkler Cooling (SC) and Zero Cooling (ZC). Gilts were weighed at the commencement of the experiment and thereafter fed ad libitum from service to farrowing. Feed intake till farrow, feed cost, gilt weight at farrow, date of farrow, litter size and weight were recorded. The feed/piglet weight, feed intake/litter, feed cost/litter and birth weight/piglet were derived. The results showed that feed intake per litter and feed per piglet weight were highest for gilts placed on WC(P< 0.05), followed by SC and least for sow placed on ZC; gilt weight before farrow was highest for sow placed on SC (69.78±0.92), followed by ZC (69.33±0.94) and least for gilts placed on WC (67.33±0.87); litter sizes of gilts placed under the WC and SC systems were similar (5.6±0.41) while that under the ZC system was comparatively smaller (5.4±0.40);while the date of farrow was lowest in the ZC system (113.8±0.32) followed by SC (114.0±0.33) and highest under the WC (114.1±0.33). However, the feed intake per litter, feed per piglet weight, litter sizes of gilts, birth weight per piglet of gilts and the average date of farrow among gilts placed on WC, SC and ZC were not statistically different at 5% level of significance. Though, there is no significant difference in the performance among gilts placed on WC, SC and ZC, temperature regulation through provision of efficient cooling system in piggery would help to increase litter size, improve feed intake per litter and reduce the average cost of feeding gilt per day in maximizing reproductive performances in pigs.Keywords: Cooling, gilts, service, farrow, piggery, litter size, piglet and birth weight

Breeding Australian crossbred ewes with Arabian fat-tailed rams for intensive lamb production

1996 ◽  
Vol 36 (1) ◽  
pp. 31
Author(s):  
RC Malik ◽  
MA Razzaque ◽  
S Abbas ◽  
T Al-Mutawa ◽  
N Al-Khozam
Keyword(s):  
Birth Weight ◽  
Litter Size ◽  
Reproductive Performance ◽  
Average Daily Gain ◽  
Survival Rates ◽  
Intensive Management ◽  
Season Of Birth ◽  
Genetic Groups ◽  
Sources Of Variation ◽  
Daily Gain

The reproductive performance under intensive management of Border Leicester x Merino (BLM), Dorset x Merino (DM), and Suffolk x Merino (SM) ewes imported from Australia, and local fat-tailed Naeemi (N) ewes mated to N rams was studied. Progeny performance for birth and weaning weights, average daily gain (ADG) and preweaning survival was also evaluated. BLM ewes showed the highest reproductive performance. They produced and weaned (at 8 weeks) significantly more lambs (P<0.05) than any of the other ewe genotypes. The reproductive performance of the BLM, N, DM and SM ewes, mated twice, 8 months apart, was 127, 85, 91 and 85 respectively for percentage of lambs born to ewes joined, 109, 72, 77 and 70 respectively for percentage of lambs weaned to ewes joined, and 17.8, 13.5, 12.1 and 11.6 kg respectively of lamb weaned per ewe joined over the period of 13 months from the first joining until last lambs weaned. The effect of season on ewe reproduction was significant. Birth weight was not influenced by genotype or season but did change significantly with litter size. Genetic group, litter size, season of birth and birth weight were significant sources of variation in the ADG and weaning weight of the lamb. N x BLM lambs were weaned at significantly heavier weights than lambs of the remaining 3 groups. Season of birth and birth weight also significantly affected preweaning lamb survival. About 86% of the lambs born alive were weaned with little difference between genetic groups in survival rates.

Reproduction in the mosaic-tailed rat, Melomys cervinipes (Rodentia :Muridae)

1970 ◽  
Vol 18 (2) ◽  
pp. 171 ◽  
Author(s):  
JM Taylor ◽  
BE Horner
Keyword(s):  
Litter Size ◽  
Reproductive Performance ◽  
Post Partum ◽  
Selective Advantage ◽  
Breeding Period ◽  
Mode Of Reproduction ◽  
Accessory Sex Glands ◽  
Modest Contribution ◽  
Northern Regions ◽  
Autumn And Winter

The mosaic-tailed rat, M. cervinipes, is usually an abundant murid where it occurs in the northern regions of Australia. It is an inhabitant of the forests and their fringe associations and is semi-arboreal. Although the annual reproductive performance is unknown, breeding occurs at least in late spring and summer in more southern areas of its distribution and extends into autumn and winter farther north. Litter size ranges from two to four. The nipple-clinging behaviour of the young appears to be of selective advantage as an escape mechanism. Description of the histology of the gonads and accessory sex glands is given for juveniles, breeding adults, and sexually quiescent adults. M. cervinipes is polyoestrous and a spontaneous ovulator and may experience a post-partum oestrus. Melomys is not known to occur in plague proportions in its native habitat; its mode of reproduction favours a prolonged and modest contribution of young within a breeding period.

Studies in sow reproduction 1. The effect of nutrition between weaning and remating on the reproductive performance of primiparous sows

1972 ◽  
Vol 15 (3) ◽  
pp. 259-264 ◽  
Author(s):  
P. H. Brooks ◽  
D. J. A. Cole
Keyword(s):  
Litter Size ◽  
Reproductive Performance ◽  
Post Partum ◽  
Large White ◽  
The Mean ◽  
Sow Reproduction

SUMMARYFollowing weaning of their first litter at 42 days post partum, 36 Landrace × (Landrace × Large White) sows were fasted for 24 hr then allocated to one of three feed levels, 1·8, 2·7 and 3·6 kg food/day, until the day after mating. During pregnancy all the sows received 1·8 kg food/day.The incidence of infertility and anoestrus was greatest for sows fed 1·8 kg/day and least for sows fed 3·6 kg·day. Sows fed 1·8 kg/day took significantly (P < 0·01) longer (21·6 + 3·0 days) to return to oestrus than sows fed 3·6 kg/day (9·2 ± 2·2 days). The mean litter size for sows fed 1·8, 2·7 and 3·6 kg food/day was 9·4 ± 0·9, 10·1 ± 0·8 and 11·5 ± 0·6 piglets respectively, but these differences were not significant.

scholarly journals Balami Sheep: Performance in North-Eastern Nigeria

2021 ◽  
Vol 17 ◽  
pp. 29-35
Author(s):  
V. Buvanendran ◽  
I. F Adu
Keyword(s):  
Birth Weight ◽  
Litter Size ◽  
Survival Rates ◽  
Dry Season ◽  
Wet Season ◽  
North Eastern

Balami sheep is the largest indiginous breeds of sheep in Nigeria with a mature ewe weight of 43kg. The performance of this breed was studied using 454 lambing records of 142 ewes during a 6-year period. Lambing occurred throughout the year with a peak during the wet  season. First lambing was at 18 months of age and subsequent  lambing occurred at approximately 9 months intervals. Mean litter size increased from 1.02 at first lambing to 1.6 at 54 months years of age. Lambing interval was shorter by 50 days for lambing in the wet than in the dry season. Lamb mortality to 10 weeks of age was about 43%. Lambs born during the wet season those from primiparous ewes and twins had low survival rates. Mean birth weight was 3.3kg and weights at 4 and 10 weeks of age were 7.4 and 12.1kg respectively. Type of birth, age of dam and sex had significant effects on weights at all ages. Productivity of ewes estimated as weight of weaned lamb per kg metabolic weight per annum increased with the age of the ewe to about 55 months of age. Repeatability of litter size, lambing interval, birth and 10 weeks were 0.087, 0.091, 0.052 and 0.273 respectively.

scholarly journals Nigerian Journal of Animal Production Effect of generational differences, housing systems and seasonal variations on the reproductive performance of rabbits raised in humid tropics

2021 ◽  
Vol 42 (2) ◽  
pp. 103-110
Author(s):  
O. Y. Ayo-Ajasa ◽  
A. B. J. Aina ◽  
O. S. Sowande ◽  
L. T. Egbeyale ◽  
M. O. Ozoje ◽  
...  
Keyword(s):  
Litter Size ◽  
Reproductive Performance ◽  
Rainy Season ◽  
Second Generation ◽  
Dry Season ◽  
Humid Tropics ◽  
Housing Cost ◽  
Average Birth Weight ◽  
Housing Systems ◽  
Size At Birth

Reproductive data from 24 does (Chinchilla X New Zealand White) of twenty weeks, were analyzed to determine the effect of generation, housing systems and season on the reproductive performance of rabbits raised in the humid tropics. The experiment was carried out during four seasons namely: early dry season (EDS-September to November), late dry season (LDS-December to February), early rainy season (ERS-March to May) and late rainy season (LRS-June to August). The study was repeated in the second generation and the data obtained were subjected to analysis of variance in a 2x2x4 factorial arrangement. Factors considered were generations, housing systems, and seasons respectively. Highest breeding efficiency of 83.33% was obtained in the first generation and maximum litter size at birth (35) and weaning (28) were observed in caged-does that kindled in EDS of first and second generations respectively, while does housed on deep litter system produced the smallest litter size at birth (24) and weaning (18) in the ERS of the second generation. Highest (12) and least (4) pre-weaning losses were recorded in caged-does that kindled in ERS of the first and second generation respectively, whereas highest average birth weight (120.58g) was observed in litters of deep litter-does that kindled in EDS of the second generation. These results indicated that the production of rabbits for breeding purposes is better achieved during early dry season (September-November) and also revealed that deep litter system allows satisfactory performance and has comparative advantage over wooden cage system considering the reduction in housing cost and can be used to improve the nutritional status of the family and also to obtain some supplementary income.

Concurrent lactation and reproductive performance in CFLP mice mated post partum

1981 ◽  
Vol 15 (3) ◽  
pp. 273-275 ◽  
Author(s):  
M. L. Norris ◽  
C. E. Adams
Keyword(s):  
Litter Size ◽  
Reproductive Performance ◽  
Post Partum ◽  
Gestation Length

Fertility of nursing CFLP mice mated post partum was high (87%) and unaffected by the number of young suckled. Gestation length and litter size were positively correlated with the number of young nursed.

Increasing litter size in three breeds of sheep by superovulation

1970 ◽  
Vol 75 (2) ◽  
pp. 355-360 ◽  
Author(s):  
J. E. Newton ◽  
J. E. Betts ◽  
R. V. Large
Keyword(s):  
Body Weight ◽  
Birth Weight ◽  
Litter Size ◽  
Natural Fertility ◽  
Optimum Dosage ◽  
Pregnant Mare Serum Gonadotrophin ◽  
Different Levels

SUMMARYEwes of three breeds, Devon Longwool, Kerry Hill and Welsh Mountain were injected with different levels of Pregnant Mare Serum Gonadotrophin (PMSG) for 3 consecutive years. Within the levels of PMSG examined (0–1500 i.u.) the highest mean litter size was obtained at 1000 i.u. for the Devon Longwool (2·10) and the Welsh Mountain (2·33), and at 1500 i.u. for the Kerry Hill (2·41). This represented a response of 0·66, 1·28 and 0·56 extra lambs born for the Devon Longwool, Welsh Mountain and Kerry Hill breeds, as untreated ewes of these breeds produced 1·44, 1·05 and 1·85 lambs/litter. The lambing percentage attained was, however, lower than the response in litter size indicated, due to the incidence of barren ewes and of lamb mortality.Though the Devon ewes were heavier than the Kerry's, twin lambs out of the latter were bigger than twins from the Devon's. The relationships of body weight and of natural fertility to optimum dosage of PMSG are considered. There is discussion of the maximum litter size and minimum birth weight compatible with the production of viable lambs.

EFFECTS OF UTERINE INFUSION OF NONVIABLE SEMEN, SEMINAL PLASMA OR EGG ALBUMEN PRIOR TO BREEDING ON THE REPRODUCTIVE EFFICIENCY OF GILTS OR SOWS

1990 ◽  
Vol 70 (1) ◽  
pp. 129-133 ◽  
Author(s):  
J. R. GILES ◽  
L. H. THOMPSON ◽  
S. ARKINS ◽  
T. CAMACHO ◽  
P. A. EICHEN
Keyword(s):  
Litter Size ◽  
Seminal Plasma ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Post Partum ◽  
Pregnancy Rates ◽  
Reproductive Efficiency ◽  
Corpora Lutea ◽  
Treatment Groups ◽  
Egg Albumen

In two different experiments crossbred gilts and(or) sows were used to investigate the effects of uterine exposure (prior to breeding) to nonviable semen (NS), seminal plasma (SP) or egg albumen (EA) on reproductive performance. Treatment solutions were infused via the cervix at estrus in gilts or within 2 d post-partum in sows. Females were artificially inseminated at the subsequent estrus. In the first experiment pregnancy rates for gilts infused with Beltsville Thawing Solution (BTS) as controls, NS or EA and subsequently inseminated, were 76, 85 and 54%, respectively, and were not significantly different among treatment groups. The number of total embryos (adjusted for number of corpora lutea) present at 38 d postinsemination was 9.6, 9.0 and 9.6, respectively, for BTS, ND and EA infused gilts and was not significantly different. Likewise, the number of live and dead embryos was not different among treatments. In the second experiment, the proportions of inseminated sows infused with BTS, NS or SP that subsequently farrowed were 87, 84 and 92%, respectively, and did not differ significantly among treatments. No significant differences were detected for the number of total, live or dead pigs born per litter among treatments. We conclude that uterine exposure to seminal proteins or egg albumen prior to breeding does not alter reproductive performance in gilts by 38 d of gestation. Also, the infusion of seminal proteins in sows shortly after parturition does not affect pregnancy rates or litter size at the subsequent farrowing. Key words: Reproductive efficiency, litter size, swine, artificial insemination

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