21 |
Reproductive performance of Hereford heifers as measured by MPPAMasanja, John Peter, 1940- January 1977 (has links)
No description available.
|
22 |
Nutritional aspects of dairy cattle infertility in Quebec and Trinidad.Nelson, Hezekiah H. January 1972 (has links)
No description available.
|
23 |
Role of ovarian steroids on estrus control in bovine.Rajamahendran, Rajadurai January 1976 (has links)
No description available.
|
24 |
Genetic and environmental influences on dystocia and sire evaluation for calving ease as a trait of a calfSt-Arnaud, Hilaire. January 1984 (has links)
No description available.
|
25 |
Progesterone in corpora lutea and serum of gonadotropin treated bovine.Lemay, Roch January 1977 (has links)
No description available.
|
26 |
Effect of selected physical and production traits on the tick burdens of beef cattleBotha, Theunis Christoffel January 2002 (has links)
The objective of this study was to determine the effect of selected traits such as age, sex, body weight, body length and height, body condition score (BCS), coatscore (CS), skin thickness and average skin surface temperature on tick burdens in beef cattle. Bonsmara cattle (n= 143) were used to measure visible tick counts, body condition score, coat score, skin thickness, body height and length, body weight, body surface temperature, gender and inter calving period. Measurements were taken from April to December. All animals were managed extensively on natural and cultivated pastures near George in the Southern Cape. Female animals had significantly (p<0.05) greater tick infestation (37.98±2.7) compared to male animals (16.52±1.2). Age was a significant factor (p<0.001) with the younger animals below two years having (46.40±5.26) more ticks than those of two years and older (20.15±2.44). A significant negative correlation (p<0.001; -0.29) was reported between the infestation of ticks on the animals and the age of the animal. Animals with an average body weight below 250kg had 42% (p<0.05) more ticks compared to animals with a body weight above 250kg. Age of the animal and weight were highly correlated (r= 0.70); p<0.001), while the correlation between the number of ticks per cow and the mean weight was negatively correlated (r= -0.37; p<0.001). Skin surface temperature significantly influenced tick infestation on the animals (p<0.001). The degree of infestation increased as body surface temperature exceeded 30º C. Coat score, skin thickness, body condition score and inter calving period did not significantly influence tick infestation on the animals. The infestation of ticks on the animals were significantly influenced by body height (p<0.019) and body length (p<0.001). Animals smaller than a 130cm in height had a significantly (p<0.05) greater tick infestation (36.5±5) compared to animals taller than 130cm (21.2±1.5). This trend was also observed for body length. Animals with a body length shorter than 145cm had a greater (p<0.05) average tick infestation of 41.3±4.5 compared to 23.2±1.3 to animals longer than 145cm, indicating a 44% greater tick infestation in favour of the shorter animals. For increased production and tick resistance animals should have smoother coats and be able to dissipate heat effectively.
|
27 |
The bacterial flora of the uterus of the post-partum cowElliott, L. F. (Lloyd Floren), 1937- January 1961 (has links)
No description available.
|
28 |
The use of blood metabolic concentrations as indicators of the metabolic and productive status in dairy cowsGotschi, Manuela 31 January 2008 (has links)
Please read the abstract in the section, 00front of this document</P< / Dissertation (MSc (Agric) Production Physiology)--University of Pretoria, 2008. / Animal and Wildlife Sciences / MSc Agric / unrestricted
|
29 |
Nutritional aspects of dairy cattle infertility in Quebec and Trinidad.Nelson, Hezekiah H. January 1972 (has links)
No description available.
|
30 |
Genetic and environmental influences on dystocia and sire evaluation for calving ease as a trait of a calfSt-Arnaud, Hilaire. January 1984 (has links)
No description available.
|
Page generated in 0.0486 seconds