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Improving growth in juvenile turbot (Scophthalmus maximus Rafinesque) by rearing fish in switched temperature regimes Imsland, A.K.; Schram, E.; Roth, B.; Schelvis-Smit, R.; Kloet, K. (2007). Improving growth in juvenile turbot (Scophthalmus maximus Rafinesque) by rearing fish in switched temperature regimes. Aquacult. Int. 15(5): 403-407. https://dx.doi.org/10.1007/s10499-007-9099-9 In: Aquaculture International. Springer: London. ISSN 0967-6120; e-ISSN 1573-143X, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 353387 [ aanvragen ]

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Trefwoorden

Environmental effects > Temperature effects Population functions > Growth Scophthalmus maximus (Linnaeus, 1758) [WoRMS] Marien/Kust

Author keywords

growth; temperature regimes; turbot (Scophthalmus maximus)

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Auteurs		Top
Imsland, A.K. Schram, E. Roth, B.	Schelvis-Smit, R., meer Kloet, K.

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Abstract

The effect of thermal history (16 and 20°C) on growth of juvenile turbot, Scophthalmus maximus (initial mean weight 72.6 g, n = 157) was studied. Fish were divided into four groups, two groups remaining at constant temperature (C16, C20), while fish in the other groups were transferred from either 16 to 20°C (F16-20) or from 20 to 16°C (F20-16). Between 35 and 42 fish in each tank were individually tagged at the start of the experiment. The final mean weights were significantly higher in the F20-16 group (230 g) than in the C20 (213 g), F16-20 (211 g) and C16 (205 g) groups. The overall growth rate was highest in the F20-16 group (1.17% day-1) but comparable in the three other groups (1.00-1.04% day-1). Our findings indicate that, even at near-optimal temperature for a given size, the temperature history of the fish may influence future growth. Based on these indications, we conclude that as turbot grow larger, the temperature should be reduced to take advantage of the change in optimal temperature for growth with increasing fish size rather than rearing at constant temperatures.

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