Effects of 12 factors on burbot Lota lota (L., 1758) weaning performances using fractional factorial design experiment
Identifieur interne : 000028 ( France/Analysis ); précédent : 000027; suivant : 000029Effects of 12 factors on burbot Lota lota (L., 1758) weaning performances using fractional factorial design experiment
Auteurs : Awatef Trabelsi [France, Tunisie] ; Jean-Noël Gardeur [France] ; Fabrice Teletchea [France] ; Pascal Fontaine [France]Source :
- Aquaculture : (Amsterdam) [ 0044-8486 ] ; 2011.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Aquiculture.
English descriptors
Abstract
Sixteen weaning protocols for burbot were tested by using a fractional factorial design experiment taking into account 12 factors (feeding, environmental and stocking density factors) with two modalities. A high survival rate (76%), associated with the lowest cannibalism rate (7%) was recorded for a combination that groups: a long photophase (18 h), low light intensity (70 Ix), white tank colour, slightly salty water (5 ppm), high larval density (150 individuals/L), a dry commercial food (AgloNorse) distributed every hour without a co-feeding period, a long weaning duration (10 days) and feeding rate decrease (30% daily). In this combination, however, specific growth rate was weak (1.3%.d-1) compared to other combinations where growth rate was high but associated with both high cannibalism and final weight heterogeneity. Statistical analyses of factor effects showed that low salinity associated with dry food distribution as well as a long weaning period (10 days) increased significantly the survival rate (p<0.05). Total mortality was associated with no salinity, a short weaning duration and feeding at daylight with INVE food (Lansy). Different combinations of treatment modalities can lead to similar performances implying that significant effects were modified by others within the rearing system and that all interactions had not been highlighted.
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Pascal:11-0264733Le document en format XML
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A high survival rate (76%), associated with the lowest cannibalism rate (7%) was recorded for a combination that groups: a long photophase (18 h), low light intensity (70 Ix), white tank colour, slightly salty water (5 ppm), high larval density (150 individuals/L), a dry commercial food (AgloNorse) distributed every hour without a co-feeding period, a long weaning duration (10 days) and feeding rate decrease (30% daily). In this combination, however, specific growth rate was weak (1.3%.d<sup>-1</sup>) compared to other combinations where growth rate was high but associated with both high cannibalism and final weight heterogeneity. Statistical analyses of factor effects showed that low salinity associated with dry food distribution as well as a long weaning period (10 days) increased significantly the survival rate (p<0.05). Total mortality was associated with no salinity, a short weaning duration and feeding at daylight with INVE food (Lansy). Different combinations of treatment modalities can lead to similar performances implying that significant effects were modified by others within the rearing system and that all interactions had not been highlighted.</div></front></TEI><affiliations><list><country><li>France</li><li>Tunisie</li></country><region><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Vandœuvre-lès-Nancy</li></settlement></list><tree><country name="France"><region name="Grand Est"><name sortKey="Trabelsi, Awatef" sort="Trabelsi, Awatef" uniqKey="Trabelsi A" first="Awatef" last="Trabelsi">Awatef Trabelsi</name></region><name sortKey="Fontaine, Pascal" sort="Fontaine, Pascal" uniqKey="Fontaine P" first="Pascal" last="Fontaine">Pascal Fontaine</name><name sortKey="Gardeur, Jean Noel" sort="Gardeur, Jean Noel" uniqKey="Gardeur J" first="Jean-Noël" last="Gardeur">Jean-Noël Gardeur</name><name sortKey="Teletchea, Fabrice" sort="Teletchea, Fabrice" uniqKey="Teletchea F" first="Fabrice" last="Teletchea">Fabrice Teletchea</name></country><country name="Tunisie"><noRegion><name sortKey="Trabelsi, Awatef" sort="Trabelsi, Awatef" uniqKey="Trabelsi A" first="Awatef" last="Trabelsi">Awatef Trabelsi</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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