Response of ewes to lupin supplementation at different times of the breeding season

1982 ◽  
Vol 22 (117) ◽  
pp. 264 ◽  
Author(s):  
PB Gherardi ◽  
DR Lindsay
Keyword(s):  
Body Weight ◽  
Breeding Season ◽  
Western Australia ◽  
Ovulation Rate ◽  
Mediterranean Environment ◽  
Natural Pasture ◽  
Australian Sheep ◽  
The Mediterranean ◽  
Better Than

Groups of 100 ewes grazing natural pasture in southern Western Australia were fed supplements of 750 g lupin grain for nine consecutive days every six weeks from October 1975-March 1976 to test whether the consistently low ovulation rate in West Australian sheep would vary with season if nutrition were better than normal. The ovulation rate of unsupplemented control ewes was from 1.05- 1.13 and did not vary significantly with season. Ewes responded significantly to supplementation and this response was unrelated to changes in body weight and varied in magnitude with season. It was about 20% in October, January and March but not significant in December. It is concluded that ovulation rates in pasture-fed sheep in the Mediterranean environment of southern Western Australia can vary with season, but only when the sheep are supplemented.

Studies in ovine infertility in agricultural regions in Western Australia: the influence of a supplement of lupins (Lupinus angustifolius cv. Uniwhite) at joining on the reproductive performance of ewes

1975 ◽  
Vol 26 (3) ◽  
pp. 567 ◽  
Author(s):  
TW Knight ◽  
CM Oldham ◽  
DR Lindsay
Keyword(s):  
Body Weight ◽  
Western Australia ◽  
Reproductive Performance ◽  
Dietary Supplementation ◽  
Lupinus Angustifolius ◽  
Ovulation Rate ◽  
Mineral Supplement ◽  
Nitrogen Levels ◽  
Wool Growth ◽  
Agricultural Regions

The dietary supplementation of groups of 200 ewes with lupins (0.23 or 0.45 kg per head per day) just prior to and during joining increased the ovulation rate by 8–25 ovulations per 100 ewes and the number of lambs born increased by 5–23 lambs per 100 ewes joined. The increase in the number of lambs born had two components: (i) an increase in number of ewes lambing and (ii) an increase in the number of twin births. Another study suggested that feeding the lupin supplement during joining gave larger increases in the reproductive performance of the ewes, especially in number of ewes lambing, than feeding the supplement of lupins before joining. The increases in reproductive performance following lupin supplementation were not associated with differences or changes in body weight or with differences in the rate of wool growth. The feeding of a barley + urea + mineral supplement that provided 25% more digestible energy than the lupin supplement and similar nitrogen levels, but with 50% of the nitrogen in the form of urea, resulted in no increase in the reproductive performance of the ewes.

Studies in ovine fertility in agricultural regions of Western Australia : ovulation rate, fertility and lambing performance

1975 ◽  
Vol 26 (1) ◽  
pp. 189 ◽  
Author(s):  
DR Lindsay ◽  
TW Knight ◽  
JF Smith ◽  
CM Oldham
Keyword(s):  
Body Weight ◽  
Western Australia ◽  
Reproductive Performance ◽  
Ovulation Rate ◽  
Day Length ◽  
Multiple Ovulation ◽  
Agricultural Regions

A total of 29,500 ewes, of which 2049 were laparotomized, in 53 flocks were used to determine the extent by which variations in body weight and age of the ewes and the temperature and day length about the time of mating were associated with the number of ovulations per 100 ewes (ovulation rate) and reproductive performance of sheep in south Western Australia. Overall there were only 113.7?2.2 ovulations per 100 ewes in the flocks studied. Less than 3% of the ewes failed to ovulate, so that in general differences between flocks were due to differences in the rate of multiple ovulation. Flocks with high ovulation rates produced more lambs per 100 ewes. There were about six extra lambs per 100 ewes for every 10% increase in the ovulation rate. About 40% of these extra lambs were due to extra twins; the remainder were due to more ewes lambing. Both age and body weight of the ewes were significantly correlated with ovulation rate (r = 0.41, P < 0.01 and r = 0.42, P < 0.01, respectively) and all the parameters of reproduction studied. Each 5 kg difference in body weight was associated with 5.9 extra ovulations per 100 ewes (P < 0.01).

The effect of season on the ovulation rates of Merino and crossbreed ewes in Western Australia

1969 ◽  
Vol 9 (38) ◽  
pp. 267 ◽  
Author(s):  
HE Fels ◽  
HG Neil ◽  
IG Ralph ◽  
RJ Suiter
Keyword(s):  
Body Weight ◽  
Breeding Season ◽  
Body Condition ◽  
Ovulation Rate ◽  
The Other ◽  
Low Incidence ◽  
Breeding Seasons ◽  
Agricultural Areas ◽  
Western Australian ◽  
Teaser Rams

Five experiments involving Merino and Border Leicester X Merino crossbred ewes were carried out to investigate the effect of season on ovulation and ovulation rate in the Western Australian agricultural areas. In one experiment, involving Murray Merinos only, effects of body weight and of introduction of teaser rams were also investigated. In 1966 the breeding season began in January for Murray Merinos, but in 1966-67 some ewes had already ovulated in December. Introduction of teaser rams in early December made teased ewes ovulate sooner than unteased ewes. The number of ovulations per ewe ovulating increased during the breeding season, reaching peaks of 1.8 eggs per ewe ovulating in April and early May 1966, and 1.6 eggs per ewe ovulating in February 1967. Supplementary feeding hastened the onset of the breeding season and tended to increase ovulation rate. Peppin Merinos showed a low incidence of ovulation, which was ascribed to their very poor body condition. The Border Leicester X Merino crossbred ewes began their breeding season in March in one experiment, but more than half the ewes had already ovulated in December in the other experiment, perhaps because they were much heavier. Both group's showed marked increases in ovulation rate as their breeding seasons progressed.

scholarly journals Natural and improved natural pastures on the reproductive performance of first-calf beef cows

2011 ◽  
Vol 40 (3) ◽  
pp. 690-699 ◽  
Author(s):  
Soraya Tanure ◽  
Bernardo Augusto Albornoz Pötter ◽  
José Fernando Piva Lobato
Keyword(s):  
Body Weight ◽  
Breeding Season ◽  
Body Condition ◽  
Reproductive Performance ◽  
Body Condition Score ◽  
Lolium Multiflorum ◽  
Protein Supplementation ◽  
Protein Supplement ◽  
Natural Pasture ◽  
Condition Score

This work evaluated the reproductive performance of first-calf cows at three years of age, submitted or not to protein supplementation at yearling on natural pastures. After calving, cows were managed on natural or improved pastures. The feeding managements were the following: on natural pastures as yearlings and during pregnancy, post-calving period and breeding season; on natural pastures with protein supplement as yearlings and only natural pasture during pregnancy, post-calving and breeding season; on natural pastures as yearlings and during pregnancy and on improved natural pastures (Lolium multiflorum L., Trifolium repens cv. Yi and Lotus corniculatus cv. São Gabriel) during the post-calving period and breeding season; on natural pastures with protein supplement at yearling, on natural pastures during pregnancy, and on improved natural pasture during post-calving period and breeding season. Cows did not differ on body weight, but from calving to the beginning of breeding season, cows on improved natural pastures presented higher weight gain than those on natural pastures (0.203 vs. 0.109 kg/day). Cows in post-calving on natural pastures lost 1.0 point of body condition score during mating, determinant of the lowest pregnancy rate and later conception in relation to cows on improved natural pasture. Pregnant cows presented higher body weight (440 vs. 413 kg) and body condition score (4.14 vs. 3.66 points) than open cows at the end of the breeding season.

A note on attainment of puberty of september-born early-maturing ewe lambs in relation to level of nutrition

1991 ◽  
Vol 53 (3) ◽  
pp. 407-409 ◽  
Author(s):  
F. Forcada ◽  
J. A. Abecia ◽  
L. Zarazaga
Keyword(s):  
Sexual Activity ◽  
Breeding Season ◽  
Ovulation Rate ◽  
Corpora Lutea ◽  
Plasma Progesterone ◽  
Ewe Lambs ◽  
Early Maturing ◽  
Age At Puberty

The attainment of puberty in September-born early-maturing ewe lambs was studied at Zaragoza (latitude 41° 40' N). Thirty twin Salz females were allocated to two groups receiving two nutrition levels after 3 months of age: high (500 g/day lucerne hay and 500 g/day concentrate) (H) and low (500 g/ day lucerne hay) (L). Oestrus was detected daily by aproned rams. Corpora lutea were counted after oestrus and plasma progesterone levels monitored each week.In the first breeding season (January to February) the percentage of females showing sexual activity (silent emulation or oestrus and ovulation) was higher in the H compared with the L group (67 and 20%; P < 0/05). Nonpubertal oestrus before the main breeding season was detected in 67% of animals. In the main breeding season and for H and L groups respectively, percentage of females showing silent ovulation before puberty was 67 and 33% and mean age at puberty extended to 319 (s.e. 4-8) and 314 (s.e. 3·7) days. Ovulation rate at puberty was 1·73 (s.e. 0·13) and 1·33 (s.e. 0·15) respectively (P < 0·05).

Research and Prediction: The inaugural Hartley Lecture delivered at the Royal Society, 21 May 1974

1974 ◽  
Vol 29 (1) ◽  
pp. 11-27
Keyword(s):  
Royal Society ◽  
British Association ◽  
The Mediterranean ◽  
Better Than ◽  
Great Exhibition

I think it must have been Harold Hartley’s sense of history which first marked me down for his attention. In 1950 he had been President of the British Association for the Advancement of Science. 1951 was the centenary year of the Great Exhibition, inspired and largely managed by Prince Albert. Harold apparently made up his mind that it would be appropriate for me to succeed him as President of the British Association for that anniversary year. Furthermore, he hoped thereby to enlist my interest in all things scientific in the expectation that this connexion would give encouragement to scientists. In this way, at the age of 30, I was ‘Hartled’ into a position for which I had absolutely no qualifications whatever and which is usually reserved for the most distinguished scientists of the day. What is more, I was a serving Naval Officer with the Mediterranean Fleet and therefore not entirely unoccupied. It was Sir David Martin who first publicly referred to the verb ‘to Hartle’ which is declined like this: ‘I think’, ‘You do’, ‘It is successfully accomplished.’ Sir David Martin explained the process this way: ‘If Harold, in his persuasive way, says he thinks something or other should be done and convinces you that you can help, you don’t gripe about it, you put off other things to do what he suggests and do it much better than you thought you were capable of doing it.’

THE ACCUMULATIVE EFFECT OF FINNSHEEP BREEDING IN CROSSBREEDING SCHEMES: REPRODUCTIVE PERFORMANCE

1988 ◽  
Vol 68 (1) ◽  
pp. 69-81 ◽  
Author(s):  
MOHAMED H. FAHMY ◽  
JACQUES J. DUFOUR
Keyword(s):  
Body Weight ◽  
Mortality Rate ◽  
Key Words ◽  
Litter Size ◽  
Reproductive Performance ◽  
Conception Rate ◽  
Ovulation Rate ◽  
Genetic Groups ◽  
Linear Regressions ◽  
Size At Birth

Reproductive performance and body weight were studied on 361 ewes, representing Finnsheep (F), DLS (a population of 1/2 Dorset, 1/4 Leicester, 1/4 Suffolk) and seven combinations ranging from 1/8 to 7/8 Finnsheep breeding. Conception rate in yearlings was 61.5% for DLS compared to 89.0% for F with the crosses being intermediate. Conception rate in older ewes was similar in the different genetic groups (avg. 94%). Ovulation rate and litter size at birth of DLS ewes were 1.72 and 1.44 lambs, which was less than half those of F ewes (3.51 and 2.86 lambs, respectively). Both traits increased progressively with an increase in F breeding in crosses and with advances in age. DLS ewes weaned 1.22 lambs compared to 2.03 lambs for F ewes and 1.84 lambs for 4/8 F ewes. The heaviest litters at weaning (31.7 kg) were raised by 4/8 F ewes, followed by 7/8 F (30.8 kg) while those raised by DLS ewes weighed 23.0 kg and F ewes 29.1 kg. Percentage of ova lost per ewe mated averaged 24% and ranged between 18% (DLS and 1/8 F) and 29% (6/8 F). About 3.6% of lambs were born dead and a further 13.8% died before weaning. Preweaning mortality rate was highest in F (22.9%) and lowest in 3/8 F (9.4%). Average kilograms of lambs weaned per ewe exposed was highest in 4/8 F (27.6 kg) followed by F (26.0 kg), whereas that of DLS was the lowest at 18.1 kg. The 4/8 F cross showed 25% heterosis in kg of lambs weaned per ewe exposed and 52.5% increase over DLS. Significant positive linear regressions were calculated for ovulation rate, litter size and preweaning mortality rate on proportion of Finnsheep breeding in crosses. The relation was quadratic for percent ova lost and lamb mortality at weaning. Yearling DLS females weighted 36 kg compared to 44 kg for F yearlings. However, at 5 yr of age DLS ewes weighed 62 kg, 5 kg heavier than F ewes. The heaviest ewes at all ages were the 4/8 F (45 kg at 1 yr, 65 kg at 5 yr). Key words: Reproduction, DLS sheep, Finnsheep, crossbreeding, heterosis, repeatabilities

On a saddled snake eel Pisodonophis semicinctus (Osteichthyes: Ophichthidae) trawled in the Strait of Sicily (Mediterranean Sea)

2000 ◽  
Vol 80 (5) ◽  
pp. 951-952 ◽  
Author(s):  
Sergio Ragonese ◽  
Giovan Battista Giusto
Keyword(s):  
Body Weight ◽  
Mediterranean Sea ◽  
Bottom Trawl ◽  
Northern Coast ◽  
Rare Finding ◽  
Strait Of Sicily ◽  
Total Length ◽  
The Mediterranean

The occurrence in the Strait of Sicily of the saddled snake eel, Pisodonophis semicinctus (Osteichthyes: Ophichthidae), a rare finding for the Mediterranean Sea, is confirmed on the basis of one specimen caught off the northern coast of Tunisia in 1991. The specimen, 800 mm in total length and 457 g in body weight (preserved condition), was captured during a commercial bottom trawl hauled at 30 m next to Cape Bon (north of Tunisia). This represents the second and fourth documented record of this Atlantic intruder within the Strait of Sicily and the Mediterranean Sea, respectively.

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