Influence of salinity on energy metabolism in juvenile turbot, Psetta maxima (L.).

Dietz, C., Stiller, K. T., Griese, M., Schulz, Carsten and Susenbeth, A. (2013) Influence of salinity on energy metabolism in juvenile turbot, Psetta maxima (L.). Aquaculture Nutrition, 19 . pp. 135-150. DOI 10.1111/anu.12034.

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Oxygen consumption (OC) was measured for 24h in juvenile turbot, Psetta maxima (L.) using flow-through respirometry to examine the influence of salinity on energy metabolism. Turbot [164g mean initial body weight (BW)] were reared at 16.5 +/- 0.2 degrees C and three different salinities (10, 20, 30g L-1). Digestible and metabolizable energy requirements for maintenance (DEm; MEm) as well as the respective efficiencies of energy utilization for growth (k(g (DE)); k(g (ME))) were identified using different feeding levels (0.3, 0.6, 0.9gkg(-1) metabolic BW) and applying linear regression analysis. We found that nutrient and energy digestibilities decrease with an increasing salinity. DEm and MEm were 14.9-20.2 and 13.3-18.3kJ kg(-0.8) day(-1) and k(g (DE)) and k(g (ME)) 0.82-0.87 and 0.87-0.91, respectively. No differences were observed in DEm, MEm, k(g (DE)) and k(g (ME)) between salinities, although these parameters were low at a high salinity (30g L-1). Turbot showed the most favourable combination of DEm and k(g (DE)) (MEm and k(g (ME))) at a salinity of 20g L-1 and at 30g L-1 growth and energy utilization were reduced at high energy intake. However, energy requirements for iono- and osmoregulation were small.

Document Type: Article
Additional Information: Times Cited: 0 Dietz, C. Stiller, K. T. Griese, M. Schulz, C. Susenbeth, A. 1 Si
Keywords: efficiency of utilization energy maintenance requirement salinity turbot
Research affiliation: Kiel University
Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > The Future Ocean - Cluster of Excellence > FO-R04
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1111/anu.12034
ISSN: 1353-5773
Projects: Future Ocean
Date Deposited: 08 Jul 2014 09:00
Last Modified: 23 Sep 2019 22:09

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