Effect of Feeding Frequency on the Growth of the European Mudminnow Larvae (Umbra krameri Walbaum, 1792) Reared in Controlled Conditions

1 Szent István University, Institute of Environmental and Landscape Management, Department of Aquaculture, Faculty of Agriculture and Environmental Science, 2100 Gödöllö, Hungary
2 Tavirózsa Association of Environmental Protection and Nature Conservation, 2112 Veresegyház, Hungary
3 University of Novi Sad, Department of Biology and Ecology, Faculty of Sciences, 21102 Novi Sad, Serbia


DEMÉNY, F., M. MÜLLERNÉ TRENOVSZKI, S. TATÁR, S. SIPOS, B. URBÁNYI and T. MÜLLER, 2014. Effect of feeding frequency on the growth of the European mudminnow larvae (Umbra krameri Walbaum, 1792) reared in controlled conditions. Bulg. J. Agric. Sci., 20: 670-674


Effects of feeding frequency were examined on European mudminnow larval growth (initial average total body length: 7.5 mm) under controlled rearing conditions. Two treatments were set in 3 replicates: „Group A”: fed with Artemia salina nauplii four times day-1 and “Group B”: fed with Artemia nauplii six times-1 day. At the end of the 21-day-long examination period significant differences (p<0.05) were found in the total length between the two groups. Average final total lengths were the followings in the groups: “A” 15.5 mm, „B” 16.6 mm. Average live weights of the fish in experimental groups reached 34.4±2.4g, and 44.4±1.4g at the end of the trial in groups A and B, respectively. At the end of the trial period larvae were suitable for stocking into natural waters.

Key words: Umbridae, Artemia, stocking size
Abbreviations: A – Artemia feeding group; A4× – four times feeding day-1; A6× – six times feeding day-1; BM – body mass; BMt – final body mass (mg); BM0 – initial body mass (mg); DGL – Daily Growth in Length (mm day-1); exp. – experiment; ind. – individual; F – feeding; S – survival rate; SD – standard deviation; t – the duration of the experiments (days); T - water temperature (°C); TL – total length; TL0 – initial total length (mm); TLt – final total length (mm)

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