UTILIZATION OF WATER CRESS (NASTURTIUM OFFICINALE L.) IN NOBLE CRAYFISH (ASTACUS ASTACUS) FEEDING
Juvenile Astacus astacus (initial b.w.: 0.98 ± 0.06 g) were cultured (30 crayfish/m2) in 200l tanks for 69 days. The experimental design was composed of three treatments as follows: control diet (C) (crude protein: 28.4% of the total dried matter, “DM”; ether extract: 6.22% DM), water cress (W)...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2006-01-01
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| Series: | Knowledge and Management of Aquatic Ecosystems |
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| Online Access: | http://dx.doi.org/10.1051/kmae:2006024 |
| Summary: | Juvenile Astacus astacus (initial b.w.: 0.98 ± 0.06 g) were cultured (30 crayfish/m2) in 200l tanks for 69 days. The experimental design was composed of three treatments as follows: control diet (C) (crude protein: 28.4% of the total dried matter, “DM”; ether extract: 6.22% DM), water cress (W) (crude protein: 20.7% DM; ether extract: 1.9% DM) and control diet + water cress (C + W) with thee replicates per treatment. Relative growth rate improved significantly (P < 0.05) in crayfish fed C + W (+ 110%) compared to W (+ 43%) and the control diet (+ 36%). Gross protein and lipid retentions of the treatment C + W were significantly higher than the control diet and water cress fed alone. At the end of the experiment, a higher survival rate of A. astacus was observed (P < 0.05) in the treatment C + W (67%) and C (71%) compared to the W (58%). These results suggest that the plant water cress (Nasturtium officinale) can be used as supplemental food in noble crayfish feeding.
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| ISSN: | 1961-9502 |