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"Experientia docet" - Experience is the best teacher

Effects of short chain fatty acid (SCFA) supplementation on performance and egg characteristics of old breeder hens (Short commu

  • 2007
  • Issue: 3
  • Volume: 37
E. Sengor, M. Yardimci, S. Cetingul, I. Bayram, H. Sahin and I. Dogan Page: 158 - 163

A study was conducted to determine the effect of supplementing the diet of breeder hens with a short-chain fatty acid (SCFA) premix, containing 509 g fatty acid salts/kg of which 285 g were calcium butyrate, on their eggshell characteristics and…

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Genetic correlations between female fertility and production traits in South African Holstein cattle

  • 2007
  • Issue: 3
  • Volume: 37
M.L. Makgahlela, C.B. Banga, D. Norris, K. Dzama and J.W. N'gambi Page: 180 - 188

Female fertility is increasingly gaining importance in national dairy cattle breeding objectives worldwide. In South Africa, there is no routine prediction of breeding values for reproductive performance in dairy cattle and selection is mainly focused on production traits. The objective…

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Relationship between tissue retention efficiency and production traits in a slow-growing broiler population

  • 2007
  • Issue: 3
  • Volume: 37
J.E. Melo, J.C. Porteyro Ibarra, A.I. Erias, L.R. Morao, F. Cortés Rondá¡n and M.C. Miquel Page: 164 - 169

An experiment was conducted using 96 individually caged male broilers between 49 and 77 d of age. One objective was to establish phenotypic relationships between some production traits [feed conversion ratio (FCR), feed consumption, residual feed consumption (RFC), relative weight…

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Heterogeneity of variance and its implications on dairy cattle breeding

  • 2007
  • Issue: 3
  • Volume: 37
T.K. Muasya, E.D. Ilatsia, T.M. Magothe and A.K. Kahi Page: 170 - 175

Milk yield data (n = 12307) from 116 Holstein-Friesian herds were grouped into three production environments based on mean and standard deviation of herd 305-day milk yield and evaluated for within herd variation using univariate animal model procedures. Variance components…

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Fermentative attributes of wilted vs. unwilted Digitaria eriantha silage treated with or without molasses at ensiling

  • 2007
  • Issue: 4
  • Volume: 37
W.A. van Niekerk, Abubeker Hassen, F.M. Bechaz and R.J. Coertze Page: 261 - 268

Silages made from directly cut or wilted Digitaria eriantha treated with or without molasses were evaluated to determine fermentative characteristics. The grass was harvested at the boot stage of growth and the material was ensiled in 1 kg mini-silos. Treatments…

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Broiler breeders should not be reared on long photoperiods

  • 2007
  • Issue: 4
  • Volume: 37
P.D. Lewis and R.M. Gous Page: 215 - 220

Sexual maturity is delayed and egg numbers are reduced when broiler breeders are reared on long photoperiods. However, this is the recommended procedure for rearing spring-hatched birds in non-lightproof buildings. Research at the University of KwaZulu-Natal has suggested that this…

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Growth performance and carcass characteristics of three Ethiopian goat breeds fed grainless diets varying in concentrate to roug

  • 2007
  • Issue: 4
  • Volume: 37
Ameha Sebsibe, N.H. Casey, W.A. van Niekerk, Azage Tegegne and R.J. Coertze Page: 221 - 232

Growth and carcass characteristics of three Ethiopian goat breeds, the Afar, Central Highland (CHG) and Long-eared Somali (LES) were evaluated using three grainless diets varying in concentrate:roughage ratios (diet 1 was 50:50, diet 2, 65:35 and diet 3, 80:20) under…

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Relationship of testicular development with age, body weight, semen characteristics and testosterone in Kivircik ram lambs

  • 2007
  • Issue: 4
  • Volume: 37
Ö. Elmaz, Ü. Cirit and H. Demir Page: 269 - 274

The study was conducted to measure the development of several testicular characteristics and to investigate the relationship between testicular parameters with body growth, semen characteristics and serum testosterone levels in growing ram lambs. Seventeen single born Kivircik ram lambs from…

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