The effect of light intensity on performance of larval pike-perch (Sander lucioperca) |
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| Institution: | 1. Gesellschaft für Marine Aquakultur, Hafentörn 3, 25761 Büsum, Germany;2. Institute of Animal Breeding and Husbandry, Marine Aquaculture, Christian-Albrechts-University, Kiel, Germany;3. Landwirtschaftskammer Schleswig-Holstein, Grüner Kamp 15-17, 24768 Rendsburg, Germany;1. Hungarian University of Agriculture and Life Sciences, Institute of Aquaculture and Environmental Safety, Research Centre for Aquaculture and Fisheries, Anna-Liget Str. 35, Szarvas, H-5540, Hungary;2. PhD School of Animal Biotechnology and Animal Science, Hungarian University of Agriculture and Life Sciences, Gödöll? H-2100, Hungary;3. Faculty of Engineering, University of Szeged, Dugonics tér 13, Szeged H-6720, Hungary;4. Department of Gamete and Embryo Biology, Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Tuwima 10 Str., Olsztyn 10-748, Poland;1. Gesellschaft für Marine Aquakultur mbH, Hafentörn 3, 25761, Büsum, Germany;2. Institute of Animal Breeding and Husbandry, Marine Aquaculture,Christian-Albrechts-Universität zu Kiel, Olshausenstraße 40, 24098, Kiel, Germany;1. Malatya Turgut Özal University, Do?an?ehir Vahap Küçük Vocational High School, Department of Aquaculture, 44210 Malatya, Turkey;2. ?nönü University, Faculty of Pharmacy, Department of Analytical Chemistry, 44280 Malatya, Turkey;3. University of Belgrade, Faculty of Agriculture, Institute of Animal Science, Zemun, 11080 Belgrade, Serbia;4. Hungarian University of Agriculture and Life Sciences, Institute of Aquaculture and Environmental Safety, Research Centre for Aquaculture and Fisheries, Anna-Liget Str. 35, H-5540 Szarvas, Hungary |
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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. |
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| Keywords: | Pike perch Pikeperch Aquaculture RAS Illumination |
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