Directory UMM :Data Elmu:jurnal:A:Animal Feed Science and Technology:Vol81.Issue1-2.Sep1999:
Animal Feed Science and Technology
81 (1999) 93±103
Chemical changes and influences of rapeseed
antinutritional factors on lamb physiology
and performance
2. Plasma substances and activity of the thyroid
S.N.M. Mandikia,*, N. Mabonb, G. Deryckea, J.L. Bistera,
J.-P. Watheletb, R. Paquaya, M. Marlierb
a
FaculteÂs Universitaires Notre-Dame de la Paix, Laboratoire de Physiologie Animale, Rue de Bruxelles 61,
B-5000 Namur, Belgium
b
Faculte Universitaire des Sciences agronomiques, Unite de Chimie GeÂneÂrale et organique,
Passage des deÂporteÂs 2, B-5030 Gembloux, Belgium
Received 7 July 1998; received in revised form 19 January 1999; accepted 15 February 1999
Abstract
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 (T3) and thyroxine (T4) decreased (P
81 (1999) 93±103
Chemical changes and influences of rapeseed
antinutritional factors on lamb physiology
and performance
2. Plasma substances and activity of the thyroid
S.N.M. Mandikia,*, N. Mabonb, G. Deryckea, J.L. Bistera,
J.-P. Watheletb, R. Paquaya, M. Marlierb
a
FaculteÂs Universitaires Notre-Dame de la Paix, Laboratoire de Physiologie Animale, Rue de Bruxelles 61,
B-5000 Namur, Belgium
b
Faculte Universitaire des Sciences agronomiques, Unite de Chimie GeÂneÂrale et organique,
Passage des deÂporteÂs 2, B-5030 Gembloux, Belgium
Received 7 July 1998; received in revised form 19 January 1999; accepted 15 February 1999
Abstract
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 (T3) and thyroxine (T4) decreased (P