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Title: Effects of rapeseed meal-glucosinolates on thyroid metabolism and feed utilization in rainbow trout
Authors: Burel, C ×
Boujard, T
Kaushik, S J
Boeuf, G
Mol, K A
Van der Geyten, Serge
Darras, Veerle
Kühn, Eduard
Pradet-Balade, B
Quérat, B
Quinsac, A
Krouti, M
Ribaillier, D #
Issue Date: Nov-2001
Series Title: General and Comparative Endocrinology vol:124 issue:3 pages:343-58
Abstract: Two rapeseed meals (RM1 and RM2), containing glucosinolates at a concentration of 26 and 40 micromol/g, respectively, were incorporated at increasing levels (10, 20, and 30% for RM1 and 30 and 50% for RM2) in diets of juvenile rainbow trout. Disturbances in the thyroid axis appeared after 14 days of feeding (with a dietary incorporation level of 10%). The dietary supplementation with T(3) or iodine induced an increase in plasma T(3) levels, compared to that in fish fed the RM diets, and reduced the deleterious effect of RM on growth. When trout were reared in seawater, there was also a slight increase in thyroid hormone levels. TSH treatment had no effect on the thyroid hormone plasma levels. The incorporation of 30% of RM1, which induced a lower dietary content of toxic compounds than RM2, led to a rapid decrease of plasma T(4) and T(3) levels, but growth was affected only after 6 months of feeding. During these studies, the deiodinase activities responded in a complex manner to restore plasma and tissue levels of T(3).
URI: 
ISSN: 0016-6480
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Animal Physiology and Neurobiology Section - miscellaneous
× corresponding author
# (joint) last author

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