Publication Date:
2021-05-19
Description:
Effects of replacement of irradiated and non-irradiated pea powder with fish meal as an
alternative protein source in Rainbow trout (Oncorhynchus mykiss) diet were investigated on
growth parameters and thyroid hormones (T3 and T4) levels. For this purpose, 245 rainbow
trouts with an average 60 ±4 g weight of were randomly divided into seven treatments.
Dietary treatments included 20, 30 and 40% replacement of fish meal with peas without
irradiation, 20, 30 and 40% replacement of fish meal with pea-irradiated (to reduce antinutritional
factors) and no manual feed peas (control treatment), respectively. To eliminate
anti-nutritional compounds peas, the electron beams were used. Fish rearing was done in
300 l fish tank for 8 weeks. Bioassays were conducted on days zero and 56. Bioassay tests
were conducted at the beginning and at the end of the experiment. Also on day 56, the blood
samples of the fish were undertaken to determine the amount of thyroid hormone. Results
showed that irradiated and non-irradiated pea replacement up to 40% in the diet of Rainbow
trout had no negative impact on fish growth parameters compared with the control diet.
Furthermore, the use of irradiated and non-irradiated peas up to 40% had no negative
impact on thyroid hormone secretion. The results showed that pea powder as a vegetable
protein is a good substitute for fish meal in Rainbow trout diet.
Description:
Published
Keywords:
Rainbow trout
;
Oncorhynchus mykiss
;
Thyroid hormones
;
T3
;
T4
;
Pea
;
Powder
;
Growth indices
;
Hormones
Repository Name:
AquaDocs
Type:
Journal Contribution
,
Refereed
Format:
pp.147-152
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