References of "Livestock Production Science"
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See detailGenetic and non genetic effects on growth traits of West African Dwarf sheep in Benin (West Africa)
Gbangboche, A. B.; Abiola, F. A.; Alimi, S. et al

in Livestock Production Science (2008)

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See detailExercise-induced physiological adjustments to stressful conditions in sports horses
Art, Tatiana ULg; Lekeux, Pierre ULg

in Livestock Production Science (2005), 92(2), 101-111

Among athletic/sports animals, the horse has a unique ability to increase its oxygen uptake by a factor of 60 during heavy exercise. This is achieved by physiological adaptations of all the links in the ... [more ▼]

Among athletic/sports animals, the horse has a unique ability to increase its oxygen uptake by a factor of 60 during heavy exercise. This is achieved by physiological adaptations of all the links in the oxygen chain. Ventilation is increased by a factor of 30. Since the horse is a compulsory nasal breather, this hyperpnea necessitates high transmural pressure changes, which may be responsible for the dynamic collapse of the airways. Blood flow is increased by a factor of 10. Since the left ventricle is not very compliant, this increase necessitates a high filling pressure in the pulmonary circulation, which may induce capillary stress failure and exercise-induced pulmonary haemorrhage. Lastly, oxygen transport is improved by splenic contraction which increases haemoglobinemia by 50%. Sports horses frequently suffer from several problems, which are related either to endogenous or exogenous stresses experienced during their career. These stresses, caused by the use of the horse as a competition animal, may lead to several medical problems. At a systemic level, endogenous stresses include hyperkaliemia, lactacidemia, and hyperthermia; oxidative stress may induce problems at a general, and/or a pulmonary level. External factors, e.g. poor quality of inspired air, transport, hot and humid ambient conditions, and microbiological agents, may also induce abnormal body attacks, and lead to health problems. [less ▲]

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See detailEffects of the calving number on animal performance, carcass and meat composition in finishing Belgian Blue double-muscled culled females
Cabaraux, Jean-François ULg; Hornick, Jean-Luc ULg; Dotreppe, Olivier ULg et al

in Livestock Production Science (2004), 87(2-3), 161-169

In a 2-year experiment, 66 Belgian Blue (BB) double-muscled culled females have been divided in three groups according to the calving number (heifers-H, cows culled after two calvings-C2 or four calvings ... [more ▼]

In a 2-year experiment, 66 Belgian Blue (BB) double-muscled culled females have been divided in three groups according to the calving number (heifers-H, cows culled after two calvings-C2 or four calvings-C4) and finished on a maize silage-based diet in order to compare animal performance and evolution of carcass and meat characteristics with age. Four females per group were slaughtered on day 0 to assess carcass and meat characteristics of lean animals. The initial and final live weights, the carcass weight and the daily food intake increased with advancing age, while the live weight gain and feed efficiency decreased. The H presented the higher killing-out and muscle proportions and the lower adipose tissue proportion. Their meat was less dark and less red than that of older cows. The lowest protein content and the highest fat content in meat dry matter were found in the C2. In the three groups, the carcass and meat became fatter with finishing process. The amplitude of fat deposition was the highest in C2. It can be concluded that the performance of BB culled females vary with age. The carcass and meat characteristics differ mainly between H and cows, few differences appearing between cows. (C) 2003 Elsevier B.V All rights reserved. [less ▲]

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See detailFitting lactation curves of dairy cattle in different types of herds in Tunisia
Rekik, Boulbaba; Ben Gara, Abderrahmen; Ben Hamouda, Mohamed et al

in Livestock Production Science (2003), 83(2-3), 309-315

The incomplete gamma function was used to fit lactation curves of Holstein-Friesian cows in four types of herds in Tunisia. A total of 8640 records were used in the analysis. These included 1269, 637, 239 ... [more ▼]

The incomplete gamma function was used to fit lactation curves of Holstein-Friesian cows in four types of herds in Tunisia. A total of 8640 records were used in the analysis. These included 1269, 637, 239, and 498 first lactation and 2986, 1441, 650, and 920 second and later lactation records in four herd groups namely investors, state, cooperative, and farmers' herds, respectively. The effects of environmental variables, production sector, herd, parity, first test-day date, calving year, and calving season on the main lactation curve traits were analysed. The factors associated with milk yield at the beginning of lactation and the decreasing phase of the curve, persistency, and peak yield varied significantly (P<0.01) with all variables. The ascending phase of the lactation curve was not affected by parity and calving year, while days in milk until peak depended only on the rank of lactation. The state herds had the lowest peak and total yields. The summer season was unfavourable for milk production. In contrast to first lactation cows, third lactation cows had the highest peak and total yields. Milk yield was highly correlated with peak yield (r = 0.79) and was not related to persistency measure. (C) 2003 Elsevier B.V. All rights reserved. [less ▲]

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See detailGrowth patterns of Belgian Blue replacement heifers and growing males in commercial farms
de Behr, Vanessa; Hornick, Jean-Luc ULg; Cabaraux, Jean-François ULg et al

in Livestock Production Science (2001), 71

A survey was carried out to propose models of growth curves in Belgian Blue cattle less than 20 months of age and raised in commercial farms in southern Belgium. Live weight data were recorded between ... [more ▼]

A survey was carried out to propose models of growth curves in Belgian Blue cattle less than 20 months of age and raised in commercial farms in southern Belgium. Live weight data were recorded between 1993 and 1999 from 1104 breeding heifers, and 924 growing males. The linear, polynomial group, power, logistic, Brody, Gompertz, von Bertalanffy and Richards models were used and compared. A step-wise linear growth model characterized by two periods of linear growth was also evaluated. This last model has been proposed as the reference model to characterize the growth curves of Belgian Blue cattle less than 20 months old. The animals were then ranked and divided in subgroups based on percentiles and quartiles in order to compare their performances. The subgroups performing better presented a greater homogeneity. The males ranked above the 90th percentile presented a growth rate comparable to that of young males selected for artificial insemination. Cattle ranked above the third quartile presented a growth rate comparable to that of licensed animals. When reproduction performances were related to the growth rate, it appeared that the better growing heifers were bred younger and heavier than lesser performing animals. [less ▲]

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See detailIntestinal maturation induced by spermine in young animals
Peulen, Olivier ULg; Deloyer, P; Grandfils, Christian ULg et al

in Livestock Production Science (2000), 66

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See detailEffects of a dietary vitamin E supplementation on performance and meat characteristics in fattening bulls from the Belgian Blue breed
Dufrasne, Isabelle ULg; Marche, Christian; Clinquart, Antoine ULg et al

in Livestock Production Science (1998), 65(1/2), 197-201

An experiment was conducted to study effects of dietary vitamin E supplementation on animal performance, slaughter characteristics and meat quality traits in Belgian Blue double-muscled bulls. Two groups ... [more ▼]

An experiment was conducted to study effects of dietary vitamin E supplementation on animal performance, slaughter characteristics and meat quality traits in Belgian Blue double-muscled bulls. Two groups of six bulls each (404 kg) were offered (close to ad libitum) a fattening diet based on sugar beet pulp for 154 days, at which time they were slaughtered. The diet given to the control group (CG) contained 12.5 mg vitamin E/kg concentrate. The vitamin E-treated group (VG) received the same concentrate plus a supplement of 1000 mg vitamin E per bull daily. Steaks from m. longissimus thoracis were used to determine meat quality characteristics, α tocopherol concentration and thiobarbituric acid reactive substances content (TBARS), an indicator of oxidation rancidity. Supplementation had no influence on performance or carcass characteristics. The main findings were that vitamin E doubled the muscle alpha tocopherol level (1.9 vs. 0.9 mg/kg; P<0.001), lipid oxidation was suppressed as indicated by TBARS values (P<0.01 at days 7, 9, 11 and 14 after slaughter), but muscle colour was not significantly affected although a* (redness) tended to be higher for VG. [less ▲]

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See detailA bottom-up approach towards marker assisted selection
Mackinnon, M.; Georges, Michel ULg

in Livestock Production Science (1998), 54

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See detailInfluence of whole milk in diet of growing fattening Belgian Blue bulls on animal performances and on fatty acid composition in subcutaneous, intermuscular and intramuscular fats
Hornick, Jean-Luc ULg; Clinquart, Antoine ULg; Van Eenaeme, Christian ULg et al

in Livestock Production Science (1997), 48

Influence of milk in diet of growing fattening Belgian Blue bulls on animal performances and on fatty acid composition in subcutaneous, intermuscular and intramuscular fats. The use of milk as component ... [more ▼]

Influence of milk in diet of growing fattening Belgian Blue bulls on animal performances and on fatty acid composition in subcutaneous, intermuscular and intramuscular fats. The use of milk as component of a fattening diet for bulls was studied in an experiment carried-out over 2 years with Belgian Blue bulls. The animals weighed 305 kg at the beginning of the experiment. In all, 15 bulls were given a control concentrate fattening diet (control group, CG), while 11 others were fed concentrate plus 6.5 to 11 1 whole milk per day according to weight or age (milk group, MG). The fattening period lasted for 174 and 181 d respectively in groups CG and MG. The MG-group had a higher killing-out percentage (P < 0.01) and the meat was characterized by a lower b* value and a lower dry matter content (P < 0.1). Whole milk in the diet increased the proportion of shorter chain and saturated fatty acids in fat (P < 0.001) and reduced the proportion of mono- and polyunsaturated acids (P < 0.05; P < 0.1). The extent of the changes were larger in subcutaneous and intermuscular fats than in intramuscular fat. [less ▲]

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See detailComparison between culture of bovine embryos in vitro versus development in rabbit oviducts and in vivo
Ectors, Fabien ULg; Thonon, Fabienne; Delval, Alain et al

in Livestock Production Science (1993), 36

The aim of this work was to evaluate the efficiency of different embryo culture methods for in vitro embryo production: development in co-culture with bovine oviductal epithelial cells (BOEC), in BOEC ... [more ▼]

The aim of this work was to evaluate the efficiency of different embryo culture methods for in vitro embryo production: development in co-culture with bovine oviductal epithelial cells (BOEC), in BOEC conditioned medium (CM) or in rabbit oviducts, versus in vivo produced embryos. There was no significant difference in terms of percentages of cleaved and 8-cell stages obtained between CM and BOEC. In CM, 24.8% of the cleaved embryos became blastocysts. In BOEC, 14.5% of the cleaved embryos became blastocysts. Among the 190 zygotes transferred in the rabbit oviducts, 127 have been recovered 5 days later, and 17.4% became blastocysts. There was no significant difference in term of blastocyst formation between the development in rabbit and in BOEC. However, there was a significant difference between the CM group and the two other groups. The numbers of cells in blastocysts from different sources were investigated: in vivo blastocysts contained 107 cells assumed to be 100%, in vitro blastocysts developed in rabbit oviduct 100.1 cells (93.3%), BOEC blastocysts 90.8 cells (84.6%) and CM blastocysts 72.3 cells (67.3%). This study confirmed earlier works on the oviduct effect on blastocyst quality in terms of development rate and cell number. [less ▲]

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