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Research article2011Peer reviewedOpen access

The energy requirements of Eurasian perch (Perca fluviatilis L.) in intensive culture

Strand, Åsa; Overton, Julia Lynne; Alanärä, Anders

Abstract

Fish feed constitutes one of the largest costs in aquaculture, therefore inefficient feed management will have a negative impact on fish farm economics. Eurasian perch (Perca fluviatilis L.) is a relatively new candidate for freshwater aquaculture, however little is known about the energy requirements of this species. The aim of this study was to develop an energy requirement model for intensive culture of Eurasian perch reared at rational temperatures. Data on growth (the thermal unit growth coefficient, TGC, (3)root g . (degrees C . days)(-1)) and digestible energy need (DEN, kJ DE . g(-1)) of Eurasian perch at a size range of 20-180 g and at temperatures of 17 23 degrees C were used. Regression analysis revealed that both TGC and DEN were affected significantly by fish size (P < 0.001) but not by temperature (P > 0.05). Two models including body size of the fish were developed: (i) an inverse TGC model for evaluation of the daily theoretical weight increment (TWi, g . day(-1)) and (ii) a linear DEN model. The TGC model was validated by comparing theoretical data with data obtained from a commercial growth trial. By combining the TWi and the DEN, a model describing the daily theoretical energy requirement (TER, kJ . day(-1)) at different temperatures and for Eurasian perch of different sizes was successfully developed.

Keywords

daily feed requirement; energy requirement; growth rate; Perca fluviatilis

Published in

Aquaculture Nutrition
2011, volume: 17, number: 4, pages: E818-E824
Publisher: WILEY-BLACKWELL

SLU Authors

UKÄ Subject classification

Environmental Sciences related to Agriculture and Land-use

Publication identifier

  • DOI: https://doi.org/10.1111/j.1365-2095.2010.00838.x

Permanent link to this page (URI)

https://res.slu.se/id/publ/57469