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Effect of different feed rations on growth performance in various size classes of juvenile pikeperch, Sander lucioperca

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Abstract

The effect of different feed rations on RAS-based pikeperch juveniles’ growth parameters was studied. Juvenile pikeperch were reared in three separate experiments (I, II, and III) at a temperature of 24 °C with initial body weights of the fish at 1.3, 9.4, and 25.6 g, respectively. Four applied feed rations increased by 0.5% in each experiment: 3.0, 3.5, 4.0, and 4.5% of body weight per day (BW day−1) in experiment I; 2.0, 2.5, 3.0, and 3.5% BW day−1 in experiment II; 1.0, 1.5, 2.0, and 2.5% BW day−1 in experiment III. Each experiment in triplicates lasted 28 days. The fish were reared in tanks with working volumes of 1.0 m3 each. All experiments were performed in the same recirculating aquaculture system. The stocking density in experiments I, II, and III was 800, 400, and 200 individuals per tank, respectively. The results of experiment I showed the highest specific growth rate (SGR), weight gain (WG), and biomass gain at the feed ration of 4.5% BW day−1 (P < 0.05). In experiment II, feed ration from 2.5 to 3.5% BW day−1 showed the highest final weight (P < 0.05). In experimental III, feed ration of 2.0 and 2.5% BW day−1 showed the highest final weight, SGR, and WG (P < 0.05). Only in experiment III, based on SGR and WG, second-order polynomial regression showed that the optimal feed ration for pikeperch was 2.35–2.39% BW day−1.

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Acknowledgements

The study was conducted within the framework of the statutory research program of the National Inland Fisheries Research Institute in Olsztyn (No. Z-016).

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Conceptualization: Michał Kozłowski; methodology: Michał Kozłowski, Iwona Piotrowska; formal analysis and investigation: Michał Kozłowski, Iwona Piotrowska; writing—original draft preparation: Michał Kozłowski; writing—review and editing: Michał Kozłowski, Iwona Piotrowska; resources: Michał Kozłowski, Iwona Piotrowska; supervision: Michał Kozłowski. All the authors approved the final draft.

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Correspondence to Michał Kozłowski.

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The study was in compliance with Polish animal welfare regulations and approved by the Local Ethics Committee for Animal Experimentation of the National Inland Fisheries Research Institute in Olsztyn, Poland.

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The authors declare no competing interests.

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Kozłowski, M., Piotrowska, I. Effect of different feed rations on growth performance in various size classes of juvenile pikeperch, Sander lucioperca. Aquacult Int (2024). https://doi.org/10.1007/s10499-024-01475-7

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