The effect of light intensity on performance of larval pike-perch ( Sander lucioperca ).

Tielmann, Moritz, Schulz, Carsten and Meyer, Stefan (2017) The effect of light intensity on performance of larval pike-perch ( Sander lucioperca ). Aquacultural Engineering, 77 . pp. 61-71. DOI 10.1016/j.aquaeng.2017.03.001.

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Abstract

In this work performance parameters of larval pike-perch (Sander lucioperca) reared under four different light intensities (100, 500, 1000 and 2500 lx) until 21 days post hatch (dph) were investigated. As performance parameters change in length and weight, swim bladder inflation, feed consumption, natural mortality, stress induced mortality and RNA-DNA ratio were measured. Aim was to investigate the influence of light intensity on pike-perch performance during the first three weeks of larval rearing. Significant differences were found in natural and stress induced mortality as well as in weight growth. No single light exposure level combined optimal performance of all tested performance parameters. Highest light intensity of 2500 lx showed good weight growth but an increase in stress induced mortality. Bright light of 500 and 1000 lx intensity was found to improve growth and stress mortality whereas dim light conditions of 100 lx showed significantly lower natural mortality. Thus data suggested that most favorable illumination during larval pike-perch rearing comprise a tradeoff between optimal natural mortality under dim light conditions (100 lx) or optimal larval growth and stress resistance under bright light conditions (500 and 1000 lx). It is shown that high light intensities during larval rearing can be beneficial for pike-perch rearing if offspring supply is not limited.

Document Type: Article
Keywords: Pike perch, Pikeperch, Aquaculture, RAS, Illumination
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.aquaeng.2017.03.001
ISSN: 0144-8609
Date Deposited: 21 Dec 2017 12:32
Last Modified: 13 May 2019 11:15
URI: http://oceanrep.geomar.de/id/eprint/41097

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