References of "Paquay, Rose-Mary"
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See detailChemical changes and influences of rapeseed antinutritional factors on gestating and lactating ewes 1. Animal performances and plasma hormones and glucose
Mandiki, S. N. M.; Derycke, G.; Bister, J. L. et al

in Animal Feed Science & Technology (2002), 98(1-2), 25-35

An experiment was carried out in order to study the effects of high levels of low-glucosinolates (LG)-rapeseed meal of two varieties (Apex or Synergy) on ewes and lambs performances and circulating ... [more ▼]

An experiment was carried out in order to study the effects of high levels of low-glucosinolates (LG)-rapeseed meal of two varieties (Apex or Synergy) on ewes and lambs performances and circulating hormones (progesterone-P4, estradiol-E2,-prolactin-PRL, cortisol, insulin, tri-iodothyronin-T3, thyroxin-T4) and glucose. On the 100th day of gestation, 90 ewes bearing at least two foetuses were divided into 3 groups. Control, Apex and Synergy groups received concentrates with 0, 40 and 40% of LG-rapeseed meal obtained with either Apex (13.77 mumol of glucosinolates/g DM seed) or Synergy (18.19 mumol) variety. Apart from the distribution of pasture hay ad libitum, the ewes received 500 and 1200 g of concentrates/animal per day during gestation and lactation, respectively. Concentrates were offered till the 47th day of lactation, and thereafter, the ewes were fed only with hay during 3 weeks. The lambs received ad libitum concentrates without rapeseed meal from 10 days of age till slaughtering. They were weaned at 65 days of age and were slaughtered when their fattening state was optimal. The performances of ewes (food intake and liveweight profiles) and of lambs (birth liveweight, mortality at birth, weight gains, slaughtering parameters) were not reduced by 40% of LG-rapeseed meal except a decrease in the liveweight for ewes in the Apex group after lambing. The profiles and levels of plasma metabolic (T3, T4, cortisol, insulin) and reproductive (PRL, P4) hormones were not modified by the rapeseed meal. In contrast, the estradiol concentration was lower (P < 0.05) in the two groups of ewes which received rapeseed meal than in the controls as an index of an eventual disturbance in the reproductive functions. In conclusion, large amounts of LG-rapeseed meal may be used as protein supplement in the diet of ewes at the end of gestation and during lactation without negative effects on animal performances and physiology. (c( 2002 Published by Elsevier Science B.V. [less ▲]

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See detailChemical changes and influences of rapeseed antinutritional factors on lamb physiology and performance. 3. Antinutritional factors in plasma and organs
Mabon, N.; Mandiki, S. N. M.; Derycke, G. et al

in Animal Feed Science & Technology (2000), 85(1-2), 111-120

The impact of a high level of rapeseed meal in the diet on the concentration of antinutritional factors in plasma and organs was studied in 66 Texel, Suffolk or crossbred lambs. From 1 month of age till ... [more ▼]

The impact of a high level of rapeseed meal in the diet on the concentration of antinutritional factors in plasma and organs was studied in 66 Texel, Suffolk or crossbred lambs. From 1 month of age till slaughter (132+/-21 days), they were fed ad libitum with concentrates containing 0% or 25% of rapeseed meal obtained either Samourai or Honk rapeseed varieties. Lambs were weaned at 88+/-8 days of age and 24+/-5 kg live weight. Blood and organ samples were taken fortnightly for the determination of antinutritional factors. In plasma and organs, the thiocyanate concentrations were systematically higher in the Samourai and Honk lots than in the control. After weaning, the SCN- concentration in plasma increased up to 490 mu mol l(-1) in the Samourai lot. The goitrogen 5-vinyl-1,3-oxazolidine-2-thione (5-VOT) was determined in muscle, organs (thyroid, liver, kidney and lung) and biological fluid (plasma). The 5-VOT was present only after the ingestion of rapeseed meal but not to the same extent for the two varieties. The Honk rapeseed meal induced a 5-VOT level significantly (p<0.05) higher in the target organs such as lung and thyroid than Samourai. Very low levels were found in muscle, liver, kidney, plasma and lung. (C) 2000 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailChemical changes and influences of rapeseed antinutritional factors on lamb physiology and performance - 1. Animal performance and thyroid histology
Derycke, G.; Mabon, N.; Mandiki, S. N. M. et al

in Animal Feed Science & Technology (1999), 81(1-2), 81-91

Sixty six Texel, Suffolk or crossbred lambs allocated to three groups were used. From the end of their first month of age till slaughtering, they were fed ad libitum with concentrates containing 0 ... [more ▼]

Sixty six Texel, Suffolk or crossbred lambs allocated to three groups were used. From the end of their first month of age till slaughtering, they were fed ad libitum with concentrates containing 0% (Control) or 25% of rapeseed meal obtained from either Samourai (Samourai) or Honk (Honk) variety. The Samourai and Honk concentrates contained 1.95 and 4.22 mmoles/g DM of glucosinolates, respectively. Lambs were weaned at 88 +/- 8 days of age and 24 +/- 5 kg of live weight and were slaughtered when their fattening state was estimated to be optimal. Apart from low concentrate intake for suckling lambs at the beginning of the experiment in the Honk, no negative effect of low glucosinolates (LG)-rapeseed meal was noted concerning animal performance. The quality of perirenal fat was better for lambs which received rapeseed meal since lower (P < 0.5) proportions of saturated fatty acids (C-10 : 0, C-12 : 0, C-14 : 0) and higher contents (P < 0.05) of some unsaturated fatty acids (C-18 : 1trans, C-22 : 2) were determined. The thyroid weight was significantly higher (P < 0.05) for the Honk (3.04 +/- 0.8 g) than in the Control (2.6 +/- 0.5 g) and the Samourai (2.7 +/- 0.6 g). Moreover, the percentages of small thyroid follicles were lower (P < 0.05) in the Honk than in the Control and Samourai groups. Conversely, the percentages of large thyroid follicles were higher (P < 0.05) in the Honk than in the two other groups. These results suggest that rapeseed meal can be used as the only protein supplement for fattening lambs despite the modification of thyroid histology by high glucosinolate content. (C) 1999 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailChemical changes and influences of rapeseed antinutritional factors on lamb physiology and performance - 2. Plasma substances and activity of the thyroid
Mandiki, S. N. M.; Mabon, N.; Derycke, G. et al

in Animal Feed Science & Technology (1999), 81(1-2), 93-103

In order to study the effects of a high level of rapeseed meal in the diet on endocrine function and thyroid activity, sixty six Texel, Suffolk or crossbred lambs allocated to three groups were fed ad ... [more ▼]

In order to study the effects of a high level of rapeseed meal in the diet on endocrine function and thyroid activity, sixty six Texel, Suffolk or crossbred lambs allocated to three groups were fed ad libitum with concentrates containing 0% (Control) or 25% of rapeseed meal obtained with either Samourai (Samourai) or Honk (Honk) rapeseed varieties. Lambs were weaned at 88 +/- 8 days of age and 24 +/- 5 kg of live weight and were slaughtered when their fattening state was estimated to be satisfactory. Blood samples were taken fortnightly for the determinations of hormones, glucose and transaminases (GOT and GPT). To evaluate the capacity of hormone production, the thyroid glands were collected at slaughter and the in-vitro release of thyroid hormones was recorded. The plasma concentrations in triiodothyronine (T-3) and thyroxine (T-4) decreased (P <0.05) with the age of lambs and were lower (P <0.05) in the Samourai and Honk groups than in the Control. Moreover, the capacity of T-3 and T-4 production by the thyroid gland shown by the in-vitro T-3 and T-4 accumulation in the thyroid tissues was higher (P <0.05) in the Control than in the two rapeseed groups. In contrast, the concentrate with rapeseed meal had no effect on the plasma concentrations in GH, cortisol and insulin nor on other substances (glucose, GOT and GPT). These results indicate that the ingestion of rapeseed meal induces a low functional disorder of the thyroid without affecting the animal performance of lambs, as we reported previously. This is because the thyroid hormones do not appear to play a major role in the processes of growth and fattening, these having been successively taken under the control on priority by GH and insulin. (C) 1999 Elsevier Science B.V. All rights reserved. [less ▲]

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