scholarly journals Development of testicular dimensions and size, and their relationship to age and body weight in growing Kivircik (Western Thrace) ram lambs

2011 ◽  
Vol 50 (No. 6) ◽  
pp. 243-248 ◽  
Author(s):  
M. Koyuncu ◽  
S. Kara Uzun ◽  
S. Ozis ◽  
S. Duru
Keyword(s):  
Body Weight ◽  
Least Squares ◽  
Live Weight ◽  
Body Growth ◽  
Ram Lambs ◽  
Birth Type ◽  
Intensive System

Forty-seven Kivircik ram lambs, aged 2 months, raised and managed under an intensive system were used to measure the development of testis diameter and length, and scrotum circumference, length and volume, and their association with the development of body growth. The effects of age and body weight of lambs, type of birth and dam age on the development of the five testicular parameters from weaning at 2&ndash;6 months of age were investigated. In ram lambs, the respective least-squares means of testis measurements: testis diameter, testis length, scrotum circumference, scrotum length and scrotum volume were 2.55 &plusmn; 0.099 cm, 5.83 &plusmn; 0.165 cm, 15.23&nbsp;&plusmn; 0.650&nbsp;cm, 7.24 &plusmn; 0.287 cm and 87.57 &plusmn; 5.921 cm<sup>3 </sup>at 2 months; and 2.99 &plusmn; 0.099 cm, 6.59 &plusmn; 0.164 cm, 14.24&nbsp;&plusmn; 0.657 cm, 10.60 &plusmn; 0.290 cm and 157.49 &plusmn; 5.987 cm<sup>3</sup> at 6 months. The effect of birth type on testis diameter and the effect of dam age on testis length were significant (P &lt; 0.05 and P &lt; 0.01), besides the effects of lamb age and live weight of lambs on the whole testis measurements were significant (P &lt; 0.01). &nbsp;

Factors governing the shape of the growth curve of body weight and the age at slaughter of Suffolk × Welsh lambs

1966 ◽  
Vol 8 (3) ◽  
pp. 435-444 ◽  
Author(s):  
J. S. Broadbent ◽  
J. H. Watson
Keyword(s):  
Body Weight ◽  
Birth Weight ◽  
Growth Curve ◽  
Compensatory Growth ◽  
Marked Effect ◽  
Growth Curves ◽  
Live Weight ◽  
Linear Component ◽  
Slaughter Weight ◽  
Birth Type

Curves of growth in live-weight, from birth to 16 weeks of age, of 362 Suffolk × Welsh lambs were analysed for the effect of sex, birth type, sire and test centre environment and related to variation in age at slaughter.The relative pre-natal disadvantages of twin lambs resulted in their curves of growth differing from those of single-born animals, particularly in males. Test centre environment exerted a marked effect in such cases. At one centre, male twins showed marked compensatory growth.Differences in growth existed between the 14 sire progeny groups. As the linear component of the growth curves decreased, the quadratic values became increasingly negative. Deceleration of growth was most marked in slowest growing progeny groups and this was accentuated by a poor test centre environment.These factors combined to influence age at slaughter, which was also related to birth weight of the lamb. Lambs at the best test centre reached slaughter weight 10 and 16 days earlier than lambs at the two remaining centres. Sires produced differences in age at slaughter of 10 to 14 days, within centres.

The influence of birth type and sex on rearing of Polish Heath and Żelaźnieńska lambs

2020 ◽  
Vol 16 (4, Accepted for print) ◽  
pp. 9-20
Author(s):  
Aurelia Radzik-Rant ◽  
Witold Rant ◽  
Adrianna Bryjak ◽  
Roman Niżnikowski
Keyword(s):  
Body Weight ◽  
Ewe Lambs ◽  
Ram Lambs ◽  
Birth Type

<b>The aim of the study was to determine the effect of birth type and sex on lambs survival parameters of polish heath and żelazneńska sheep. The research included data, which was used to determine the prolificacy index, the percentage of live-born lambs and the lambs rearing index up to 100 days of age. A higher prolificacy index (P≤0.01) and a higher percentage (P≤0.01) of reared lambs were determined in the polish heath compared to the żelazneńska sheep. In the herd of the first breed, a greater proportion of twin and more numerous litters than singleton births were noted. Single and twin litters were dominant in the żelazneńskie sheep. The rearing rate of lambs from single litters was at a similar level in both observed breeds. However, in the herd of polish heath sheep, lambs from multiple litters shoved also high rearing rate. Single ram lambs were characterized by higher (P≤0.01) body weight at birth and at 56 days of age compared to twin born and ewe lambs, both in polish heath sheep and żelazneńska sheep. Statistical differences (P≤0.01) in body weight at birth and on 56th day of age were also recorded between twins and triplets in polish heath sheep. The analysis of the distribution of lambs' mortality during the rearing period has shown that the most critical is the first week of life of the born offsprings.</b>

scholarly journals Path coefficient model for assessment of weight using linear traits at birth and at weaning in Nigerian indigenous pig

2014 ◽  
Vol 30 (2) ◽  
pp. 281-288
Author(s):  
D.M. Ogah ◽  
N.D. Yusuf ◽  
M.M. Ari
Keyword(s):  
Body Weight ◽  
Correlation Coefficient ◽  
Body Length ◽  
Direct Effect ◽  
Bone Development ◽  
Live Weight ◽  
Path Coefficient ◽  
Explanatory Variables ◽  
Indigenous Pigs ◽  
Intensive System

Direct and indirect effects of some explanatory variables ((body length (BL), rump height (RH), rump length (RL) , rump width (RW) , shoulder width (SW), wither height (WH), heart girth (HG) and flank length (FL)) influence on live weight at birth and at weaning in Nigerian indigenous pigs, managed under semi intensive system were investigated using path analysis. Results of the analysis indicated that the correlation coefficient between body weight and body length at birth was highest (0.59) while at weaning, rump width had the highest correlation coefficient with body weight (0.60). The relationships were from low to high. The direct effect of linear traits to body weight at birth were highest with wither height and flank length similarly heart girth and rump length had better direct effect on body weight at weaning than other linear traits. The findings show that there is variability in relationship between body weight and linear traits with age, similarly both tissues and bone development play significant role in weight determination in the indigenous pigs. Thus selection for weight increase at adult phase can better be achieved at weaning, providing direction for selection towards increase weight in indigenous pigs.

Puberal development of Clun Forest ram lambs in relation to time of birth

1972 ◽  
Vol 79 (1) ◽  
pp. 83-89 ◽  
Author(s):  
Ó. R. Dýrmundsson ◽  
J. L. Lees
Keyword(s):  
Body Weight ◽  
Sexual Development ◽  
Body Growth ◽  
The Body ◽  
Chronological Age ◽  
Testicular Development ◽  
Stage Of Development ◽  
Body Development ◽  
Ram Lambs ◽  
The Right

SUMMARYSome aspects of sexual development and the attainment of puberty in Clun Forest ram lambs were studied during the two seasons 1970–1. Strong correlations existed between parameters of penial, scrotal and testicular development. Sexual development in general appeared to be more closely associated with the body growth than the chronological age of the ram lamb.Nevertheless, marked variation existed in both age and body weight at puberty. Although the majority of the lambs attained this stage of development at 4·5–5 months the age-range extended from 99 to 176 days. The mean body weight at puberty was 32·5 kg, ranging from 24·5 to 38·0 kg. There appeared to be an interaction between chronological age and general body development in relation to the appearance of sperm in the epididymides. Not only did it seem that a certain degree of body growth and testicular size was required before spermatozoa could be released, but also a limit of chronological age below which puberty was not attained. Large differences existed between individual lambs in both testicular and epididymal weights at puberty. There was a high degree of symmetry in growth between the left and the right testes and epididymides.Time of birth influenced the pattern and rate of body growth and sexual development. This seemed to be largely due to seasonal fluctuations in nutritional conditions during rearing but the results obtained do not preclude the possibility that other seasonal factors, such as the daylight environment experienced by the ram lamb, might have a certain limited influence on sexual development.

scholarly journals Effect of Finnsheep crossbreeding on Lamon sheep performance: post-mortem traits

1988 ◽  
Vol 60 (6) ◽  
pp. 515-517
Author(s):  
M. Bonsembiante ◽  
I. Andrighetto ◽  
G. Cozzi
Keyword(s):  
Body Weight ◽  
Sugar Beet ◽  
Soybean Meal ◽  
Lower Incidence ◽  
Live Weight ◽  
Post Mortem ◽  
Maize Silage ◽  
Local Breed ◽  
Beet Pulp ◽  
Ram Lambs

This experiment was conducted in order to study the effects of crossbreeding of the local breed Lamon (L) with Finnsheep (F),on the post-mortem performance of F, lambs (F x L). Nine L and 8 F x L ram-lambs were fattened with a diet (11.6 MJ M.E./kg d.m.) based on maize silage, dried sugar beet pulp and soybean meal, and slaughtered at 40.5 ± 5.9 kg live weight at the age of 22 weeks. Genotype did not affect dressing percentage on empty body weight (E.B.W.) but the crossbred lambs showed a lower incidence of the pelt (18,4 vs 20.2 % on E.B.W.; P

scholarly journals Rearing, fattening performance and slaughter indicators of lambs after selenium, zinc and vitamin E supplementation

2009 ◽  
Vol 52 (3) ◽  
pp. 309-320
Author(s):  
M. Gabryszuk ◽  
K. Horbańczuk ◽  
J. Klewiec
Keyword(s):  
Body Weight ◽  
Vitamin E ◽  
Live Weight ◽  
Control Group ◽  
Lower Body ◽  
Concentrate Mixture ◽  
Fat Thickness ◽  
Ram Lambs ◽  
And Control ◽  
Experimental Group

Abstract. The experiment was conducted on 80 Polish Merino ewes, their 82 lambs and 40 fattening rams. Merino ewes were divided into two groups: experimental (E) and control (C), each composed of 40 animals. Four weeks before lambing, 1 day, 3 weeks and 6 weeks after lambing 40 ewes of the experimental (E) group received intramuscular injection of 5 ml 0.1 % Na2SeO4 (selenium [Se]: 2.09 mg), 10 ml 10 % ZnSO4 (Zinc [Zn]: 227 mg) and 250 mg vitamin E (α-tocopherol), and control group (C) – no received. From birth all the lambs were maintained with their dams and then weaned at the age of 8 weeks, placed in individual straw-bedded pens and fattened individually with a granulated concentrate mixture until reaching a body weight about 32 kg. During fattening 20 lambs from experimental group (E) was given per os 1 ml 0.1 % Na2SeO4, 3 ml 10 % ZnSO4 and 60 mg vitamin E (α-tocopherol) daily, and control group (C) – no administered. The levels of Se, Zn and vitamin E in the blood plasma of ewes and ram- lambs were within the reference values. The lambs born by the treated ewes (E) experienced much lower body live weight at birth (P≤0.05), body weight on day 28 and 56 (P≤0.01), compared to lambs born from group (C). Also the daily live weight gain from birth to 4 week and from birth to 8 week were significantly lower (P≤0.05) in lambs born by the treated ewes. Se, Zn and vitamin E treated rams contained less fat in leg (P≤0.05), less fat thickness over ribs (P≤0.01) and less fat thickness over loin-eye than non treated rams.

Relationships between body weight and scrotal characteristics, and between environmental effects and fertility in Ethiopian Horro rams

1995 ◽  
Vol 124 (2) ◽  
pp. 297-299 ◽  
Author(s):  
Yohannes Gojjam ◽  
Solomon Gizaw ◽  
Solomon Abegaz ◽  
C. J. Thwaites
Keyword(s):  
Body Weight ◽  
Environmental Effects ◽  
Strongly Correlated ◽  
Scrotal Circumference ◽  
Higher Weights ◽  
Ram Lambs ◽  
Highly Correlated ◽  
Birth Type

SUMMARYThe relationships between body weight, scrotal characteristics and environmental effects (year, birth type and age) and fertility were studied in a total of 254 Horro rams. Fertility varied between years (P < 0·01), but not with body weight at mating within the range (30–55 kg) observed, nor with type of birth (both P > 0·05).Testicular diameter and circumference were strongly correlated to body weight (r = 0·95 and 0·89 respectively; both P < 0·001), but weight of testes only weakly so (r = 0–28; NS). Scrotal circumference was more highly correlated to body weight in ram lambs (r = 0–85; P < 0–001) than in adults (r = 0·51; p = 0·06).It is concluded that adequate levels of fertility (82 ± 1·3%) are expressed by 30 kg Horro rams, and that when feed supplies are limited there are no benefits to be gained from maintaining rams of this breed at higher weights.

Mineral retentions and body composition of grazing lambs

1988 ◽  
Vol 46 (1) ◽  
pp. 53-62 ◽  
Author(s):  
J. K. Thompson ◽  
A. L. Gelman ◽  
J. R. Weddell
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Perennial Ryegrass ◽  
Tall Fescue ◽  
Growth Rates ◽  
Live Weight ◽  
Chemical Compositions ◽  
Mineral Contents ◽  
Similar Weight ◽  
Ram Lambs

ABSTRACTGrowth rates and chemical compositions were measured with ram lambs grazing pure stands of perennial ryegrass, timothy, cocksfoot and tall fescue. A group of lambs slaughtered at the start of the trial enabled estimates to be made of the live-weight gains over the summer and the composition of these gains. The composition of the grass was also measured in samples taken at weekly intervals and estimates were made of the nutrients consumed from the different grass plots.The quantities of ash, Ca, P and Mg in the empty bodies of the lambs were within the range of published values from similar studies. They support the contention that grass-fed lambs tend to have larger contents of ash, Ca and P in their empty bodies than concentrate-fed lambs of similar weight. Perennial ryegrass provided a superior diet in that lambs eating this grass grew more quickly, with leaner tissues and higher levels of ash, Ca and P in their empty-body gains. Lambs consuming tall fescue grew most slowly but their mineral contents were as large as the ryegrass-fed lambs when data were adjusted for differences in empty-body weight. Lambs fed on timothy or cocksfoot were the most poorly mineralized in spite of consuming considerably more Ca, P and Mg than the lambs on ryegrass. The data suggest that the efficiencies of absorption of Ca and P in ryegrass may be high, at about 0·64 for Ca and 0·71 for P.

scholarly journals Growth Performance of Purgi Goats under Field Conditions in Kargil District (Ladakh)

2021 ◽  
Author(s):  
Safeer Alam ◽  
Mubashir Ali Rather ◽  
Nusrat Nabi ◽  
Gurjeet Kaur ◽  
S. Shanaz ◽  
...  
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Least Squares ◽  
Fixed Effects ◽  
Genetic Factors ◽  
Growth Traits ◽  
Fibre Production ◽  
Season Of Birth ◽  
Coefficients Of Variations ◽  
Birth Type

Background: Purgi goats are native to Ladakh. They are used for fibre production and are known for the quality chevon. A study was, therefore, undertaken to study the effect of non-genetic factors on growth traits of Purgi Goats in its breeding tract. Methods: Flocks of 80 farmers from 8 villages of district Kargil were monitored to collect the data pertaining to growth traits during 2017 and 2018. The data so collected were suitably classified to study the major fixed effects like birth year, kid, parity of dam, season of birth and type of birth. Result: The averages were1.21±0.02, 3.62±0.02, 5.82±0.02, 8.73±0.03, 10.71±0.04 and 13.49±0.09 for BW, WW, 6MW, 9MW, 12MW and 18MW, respectively. The coefficients of variations of all the traits were low. Highest variability of 13.49 was observed for 18MW. The values of least squares means (LSM’s) of 0.96±0.05, 3.74±0.03, 5.80±0.05, 8.74±0.06, 10.87±0.08 and 13.91±0.19 for birthweight (BW), weaning weight (WW), six months body weight (6MW), nine months weight (9MW), yearling body weight (12MW) and eighteen months (18MW) weight were observed in the present study. The effects of sex of kids, season of birth and year of birth were significant (p less than 0.05) on all traits under study, whereas effect of birth-type was significant (p less than 0.05) on BW and WW and effect of parity was non-significant on all traits under study. All the traits BW, WW and 6MW were positively correlated among themselves. The correlations ranged from low (between BW and WW ) to high (WW with 9MW and 12MW).

Studies of the effects of the gene N on body growth and fleece development of the New Zealand Romney. I. The body growth of the N type lamb

1959 ◽  
Vol 10 (3) ◽  
pp. 387 ◽  
Author(s):  
F Cockrem ◽  
AL Rae
Keyword(s):  
Body Weight ◽  
New Zealand ◽  
Body Growth ◽  
The Body ◽  
Environment Interaction ◽  
Lower Body ◽  
Initial Weight ◽  
Ewe Lambs ◽  
Body Weights ◽  
Ram Lambs

A study has been made of the pleiotropic effects of the gene N on the body growth and the carcass of the Sew Zealand Romney lamb. Measurements of body weight and height at withers were taken from birth to about 5 months of age for lambs born in 1952 and 1953 from matings of N/+ x +/+, N/N x N/N, N/N x N/+, and N/+ x N/+ parents. In 1952, +/+ lambs grew faster than N/+ or N/N lambs and this was shown in the greater body weight of the +/+ lambs at 30 days of age. The differences in weight gains corrected for initial weight were greater for single lambs than for twin lambs. The differences in the height at withers were proportional to those in body weight except for the N/N lambs. The N/N lambs had a greater height at withers for their body weight but this could have been the result of factors other than the gene N which were associated with the N–type flock. N–type ewe lambs kept up to 18 months of age maintained lower body weights than +/+ lambs. In 1953 no differences between N/+ and +/+ lambs were found in body growth. It is suggested that a genetic-environment interaction exists for body growth and that the environmental factor is possibly one of climate. No differences were found between the carcass measurements of N/+ and +/+ ram lambs which could not be attributed to the previous differences in body growth.

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