INFLUENCE OF BREED OF SIRE ON THE PRODUCTION OF LIGHT AND HEAVY MARKET LAMBS

1972 ◽  
Vol 52 (2) ◽  
pp. 259-266 ◽  
Author(s):  
M. H. FAHMY ◽  
C. S. BERNARD ◽  
J. P. LEMAY ◽  
M. NADEAU
Keyword(s):  
Growth Rate ◽  
New Zealand ◽  
Mortality Rate ◽  
Dressing Percentage ◽  
Lambing Rate

Data were taken on 396 lambs born to crossbred ewes to compare New Zealand-type Southdown (NZS), American-type Southdown (AS), and Suffolk (SU) rams as sires of light and heavy market lambs (20 and 40 kg liveweight respectively). Ewes mated to AS rams had 7% (P > 0.05) higher lambing rate than those mated to SU or NZS rams. Preweaning mortality rate of NZS sired lambs was 3.7 (P < 0.10 > 0.05) and 11.8% (P < 0.01) lower than those by AS and SU rams, respectively. Suffolk-sired lambs were heavier at birth and 28 days. Lambs sired by AS, NZS, and SU were 88, 82, and 83 days old at 20 kg, and 187, 172, and 166 days old at 40 kg liveweight respectively. Carcass finish score and classification were higher in NZS- and AS- than in SU-sired lambs marketed as light lambs, whereas the opposite was observed in heavy lambs. Dressing percentage was not significantly affected by breed of ram, but the lambs sired by AS rams had significantly higher pelt percentage. Lambs sired by NZS rams had generally higher lean percentage. Suffolk-sired lambs had larger bones, longer cuts, and heavier organs than those by the Southdowns. Carcasses from lambs marketed as heavy were classified 1.5 grade better, scored 2.7 points higher but dressed 0.22% lower than lambs marketed as light. Males were superior to females in growth rate and produced wholesale cuts higher in lean and lower in fat percentages. Females, however, were 8.3% (P < 0.01) higher in carcass classification than males. Other factors having significant effects were age of dam, type of birth, year, and station.

A note on the use of sodium hydroxide treated straw pellets in diets for growing rabbits

1979 ◽  
Vol 29 (3) ◽  
pp. 427-430 ◽  
Author(s):  
J. C. de Blas ◽  
Yolanda Merino ◽  
Maria J. Fraga ◽  
J. F. Gálvez
Keyword(s):  
Growth Rate ◽  
New Zealand ◽  
Sodium Hydroxide ◽  
Conversion Rate ◽  
Feed Conversion ◽  
Weaning Weight ◽  
Cereal Straw ◽  
Males And Females ◽  
Dressing Percentage ◽  
Feed Conversion Rate

ABSTRACTThe effects of the inclusion of increasing quantities of cereal straw treated with sodium hydroxide in the diet of rabbits weie studied on 68 animals, both males and females, of the Spanish Giant and New Zealand × Spanish Giant breeds, weaned at different weights. The nitrogen and fibre digestibilities, the overall growth rate (from weaning to 2·25 kg) and the partial growth rate (from weaning to 2 weeks after weaning) increased linearly, while the feed conversion rate decreased when the content of treated straw in the feed was raised. The overall growth rate for males was significantly higher (P < 0·001) and feed conversion rate lower (P < 0·01) than for females. The crossbred animals had a significantly higher overall (P < 0·001) and partial (P < 0·05) growth rate. As weaning weight increased, overall (P < 0·001) and partial (P < 0·05) growth rate also increased, whereas the dressing percentage of the carcass decreased significantly (P < 0·01).

Movement, Growth and natural mortality rate of the Red Spot King Prawn, Penaeus longistylus Kubo, from the Great Barrier Reef Lagoon

1990 ◽  
Vol 41 (3) ◽  
pp. 399 ◽  
Author(s):  
MCL Dredge
Keyword(s):  
Growth Rate ◽  
Mortality Rate ◽  
Great Barrier Reef ◽  
Annual Variation ◽  
Growth Parameters ◽  
Natural Mortality ◽  
Barrier Reef ◽  
Fishing Mortality ◽  
Nursery Areas ◽  
Reef Lagoon

Movement, growth and natural mortality rate of the red spot king prawn, Penaeus longistylus, occurring in waters of the Great Barrier Reef off Townsville, Queensland, were investigated in a series of tagging experiments. Adult P. longistylus did not migrate after leaving nursery areas. Their growth rate was slower than that of the conspecific species P. plebejus, and significant inter-annual variation in growth parameters was observed. The natural mortality rate, assessed by sequential tagging experiments that eliminated the possibility of confounding with the rate of fishing mortality, was estimated to be 0.072 (week-1).

The effect of antibiotic dietary supplements on the carcass measurements and dressing percentage of bacon pigs

1955 ◽  
Vol 46 (2) ◽  
pp. 173-179 ◽  
Author(s):  
G. Harrington ◽  
J. H. Taylor
Keyword(s):  
Growth Rate ◽  
Vitamin B12 ◽  
Dietary Supplements ◽  
Vegetable Protein ◽  
Animal Protein ◽  
Feeding Trials ◽  
The Mean ◽  
Dressing Percentage ◽  
And Control

1. Certain carcass measurements (length, shoulder and mid-back fats, belly thickness and dressing percentage) made on a total of 402 bacon pigs from four antibiotic feeding trials have been analysed.2. The length of the carcasses showed more variation between pens treated with various doses of penicillin than between control pens or pens treated with aureomycin. This greater variation in length was related to the greater variation in growth rate between the penicillin treatments. No differences in the mean lengths of control, penicillin and aureomycin treatments were found.3. Back fat measurements and belly thickness showed no differences between aureomycin, penicillin and control treatments in overall tests.4. Aureomycin consistently gave higher dressing percentages than penicillin. Animal protein also gave higher dressing percentages than vegetable protein, but no effect of vitamin B12 on this quantity was found.

Paddlefish Management, Propagation, and Conservation in the 21st Century

2009 ◽  
Keyword(s):  
Growth Rate ◽  
Population Dynamics ◽  
Mortality Rate ◽  
Population Density ◽  
21St Century ◽  
High Growth ◽  
High Growth Rate ◽  
Demographic Groups ◽  
Annual Mortality ◽  
Remnant Population

<em>Abstract</em>.—Paddlefish <em>Polyodon spathula </em>vanished from areas of the upper Tombigbee River basin in Mississippi and Alabama during the 1950s, long before channelization and damming associated with construction of the Tennessee-Tombigbee Waterway (TTW) were completed in 1984. This study was undertaken to assess distribution and population dynamics of any remaining stock. Paddlefish were not captured in upstream impoundments, but an unexploited remnant population was located in the downstream impoundment: Demopolis Lake, Alabama. Paddlefish in Demopolis Lake were characterized by a population density of 2.6 fish/ha, high growth rate relative to more northern populations, and natural annual mortality rate (<em>A </em>= 0.406) similar to other southern populations. Two wintering habitats (cutoff bendways) were heavily utilized by paddlefish. Large males primarily inhabited the more lotic bendway while females and small males were more common in the more lentic bendway, indicating differential importance of habitats among demographic groups. The restricted distribution of TTW paddlefish and demographic differences between habitats suggest that areas heavily utilized by paddlefish should be protected from further degradation. Sedimentation has resulted in reductions of bendway depth and reduced connectivity of backwaters, reducing availability of suitable paddlefish habitat. Restoring connectivity of bendways through dredging could reverse this trend and provide other benefits to fisheries.

A New Multiparametric Classification in Lung Cancer Patients - S.M.I.G.

1983 ◽  
Vol 69 (5) ◽  
pp. 437-443 ◽  
Author(s):  
Claudio Modini ◽  
Mario Albertucci ◽  
Franco Cicconetti ◽  
Donatella Tirindelli Danesi ◽  
Renzo Cristiani ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Growth Rate ◽  
Mortality Rate ◽  
Cancer Patients ◽  
Cell Type ◽  
Tnm System ◽  
Lung Cancer Patients ◽  
The Difference

The classification of bronchogenic carcinoma as a function of the prognosis is still an open field. The evaluation of stage, by use of the TNM system, and histologic cell type is not sufficient to guarantee a correct prognosis. The growth rate of the neoplasm is another important parameter. We propose a classification that takes into account the stage (S), histologic cell type (M), immune status (I) and the growth rate of the primary tumor (G): S.M.I.G. We studied 90 lung cancer patients according to the S.M.I.G. classification and we observed that their prognoses were directly correlated with their S.M.I.G. scores (the higher the score, the higher the 10-month mortality rate). The mortality rates within the first 10 months of follow-up were respectively 0%, 0%, 36.36%, 68%, 90.9% for the 5 groups obtained by S.M.I.G. The difference is statistically significant (P < 0.0075) and there is a linear correlation between the mortality rate and the score assigned to each group (R = 0.943; P < 0.05). The S.M.I.G. classification can predict the prognosis more efficiently than the usual classification (TNM) and histological cell type.

Growth, morphometrics and size structure of the Diadematidae sea urchin Centrostephanus rodgersii in northern New Zealand

2012 ◽  
Vol 63 (7) ◽  
pp. 624 ◽  
Author(s):  
Danilo Pecorino ◽  
Miles D. Lamare ◽  
Mike F. Barker
Keyword(s):  
Growth Rate ◽  
New Zealand ◽  
Sea Urchin ◽  
Size Structure ◽  
Growth Line ◽  
Fluorescent Marker ◽  
Zealand Population ◽  
Ecological Changes ◽  
Eastern Australia ◽  
Size At Age

The sea urchin Centrostephanus rodgersii has increased its range in Eastern Australia resulting in important ecological changes. C. rodgersii may also have expanded its distribution range to northern New Zealand in the last five to six decades, although little is known about this process and of the biology of the species in New Zealand. We investigated morphometrics as well as growth using two techniques (growth line count in genital plates and tag–recapture using the fluorescent marker tetracycline). These methods allowed modelling of size at age of C. rodgersii in New Zealand, which we compared with populations recently established in Tasmania. The modelled growth rate was only slightly higher in the New Zealand population, and no differences in morphometrics were observed. The New Zealand population structure suggests that annual recruitment occurs regularly, with the population including a range of ages (3 to 10+ years).

Post-natal growth changes in the fibre cortex and medulla of the new zealand romney and N-type sheep

1959 ◽  
Vol 53 (3) ◽  
pp. 358-368 ◽  
Author(s):  
Janet P. Tibbits
Keyword(s):  
Growth Rate ◽  
New Zealand ◽  
Cortical Area ◽  
Genotypic Effect ◽  
Fibre Area ◽  
Fibre Growth ◽  
Skin Biopsies ◽  
Growth Changes ◽  
Relationship Of ◽  
The Relationship

The relationship between cortical area and fibre area has been examined in the N/N, N/ +, + / +, + /nr and nr/nr genotypes of the New Zealand Romney, using skin biopsies taken at birth, 1, 3 and 16 months of age. The presence of the nr gene was shown to reduce significantly the relative cortical area. Within the genotypes there was an increase in relative cortical area with increasing age and in two-tooth ewes of N/N and N/ + there was an increase in relative cortical area in winter compared to summer.Fibre growth rates in length for primaries and for prenatal and post-natal secondaries were found for lambs between 1 and 3 months and for 16-monthold ewes. In N/N, N/+ and nr/nr primary fibre growth tended to be increased and post-natal secondary fibre growth tended to be decreased relative to + / + values.In both cortical area and fibre growth rate the greatest genotypic effect was shown by the primary fibres.Some estimates of cortical volume have been made by combining the information on cortical area and fibre growth rate and the relationship of these factors to follicle density and mean fibre area has been discussed. Finally, an indication has been given of how the associations of all these four factors might be usefully examined in some British breeds.

Lifetime productivity of single- and twin-born Corriedale sheep and their dams

1986 ◽  
Vol 26 (6) ◽  
pp. 631 ◽  
Author(s):  
R Gonzalez ◽  
R Bonnet ◽  
JC Guerra ◽  
D Labuonora
Keyword(s):  
Mortality Rate ◽  
Late Pregnancy ◽  
Early Lactation ◽  
Adequate Nutrition ◽  
Wool Production ◽  
Experimental Station ◽  
The Difference ◽  
Lambing Rate

Differences in the productivity of twin- and single-bearing, spring-lambing Corriedale ewes and their progeny were studied over 8 years at the Experimental Station, Faculty of Agriculture, Paysandu, Uruguay. Lambing ewes, grazing improved pastures during late pregnancy and early lactation, produced 9.7% less wool than dry ewes, gestation and lactation accounting for 4.5 and 5.2% of this difference, respectively. No difference in wool production was found between ewes rearing 1 or 2 lambs. Twin-born sheep produced 1.8% less wool than singles, but the difference decreased with age. Twin-born ewes had a 7.5% higher lambing rate than single-born ewes, but the mortality rate among their lambs was higher (37.1 v. 20.4%). The liveweight of single-born sheep was higher than that of twins by 20.4%, 16.0% and 11.4% at marking, weaning and 11 1 days of age, respectively. We suggest that the difference in productivity between twin- and single-bearing ewes, and their lambs, can be minimised by adequate nutrition in late pregnancy and early lactation.

Growth and carcass characteristics of ram, cryptorchid and wether Border Leicester x Merino lambs: effects of increasing carcass weight.

1986 ◽  
Vol 26 (2) ◽  
pp. 153 ◽  
Author(s):  
GJ Lee
Keyword(s):  
Growth Rate ◽  
Carcass Characteristics ◽  
The Other ◽  
Carcass Weight ◽  
Consumer Acceptability ◽  
Cross Border ◽  
Ad Libitum ◽  
Dressing Percentage ◽  
Fat Score ◽  
Score Distributions

The growth and carcass characteristics of first-cross Border Leicester x Merino ram, cryptorchid and wether lambs were compared over a range of slaughter weights (35-55 kg). Lambs were offered feed ad libitum after weaning. The growth rate of wether lambs (221 g/day) was less (P< 0.01) than that of rams and cryptorchids (308 and 280 g/day respectively, P = 0.076). The dressed carcasses of the wether lambs were approximately 2 percentage units heavier than those of the ram and cryptorchids, but this difference was partly due to the weight of the testes. Across all sex groups, dressing percentage increased by 0.46 percentage units per kg increase in carcass weight. The carcasses of rams and cryptorchid lambs tended to be leaner than those of wethers. Fat score distributions, based on export standards, were such that wethers scored higher (fatter) than rams and cryptorchids (P< 0.05). There was a significant sexx carcass weight interaction with GR tissue depths. Above 17 kg carcass weight, tissue depth of wether lambs was greater than those of the other sex types. Of 12 families assessing consumer acceptability (taste, smell, size, fatness and tenderness) of leg roasts, the majority showed no preference for any of the sexes.

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