<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The present study aimed to evaluate the feeding performance of juvenile marble goby (<italic>Oxyeleotris marmorata</italic>) on acidified diets. Five fish meal-based diets at various pH levels (2.5, 3.2, 4.3, 5.3, and 6.0 (control)) were prepared, and each of them was fed to 10 wild-caught <italic>O. marmorata</italic> juveniles (body length 7.7–9.3 cm; each fish was placed in an aquarium, hence each dietary treatment was in 10 replicates) for 20 days. Throughout the feeding trial, <italic>O. marmorata</italic> juveniles showed clear increments in the daily ingestion ratio (IR) values of AD 2.5, AD 3.2, and AD 4.3. The control diet and AD 5.3 were almost totally rejected by the fish. On day 20, the IR of AD 2.5 (0.46) and AD 3.2 (0.36) were significantly higher (<italic>P</italic> &lt; 0.05) than those of AD 5.3 (0.1) and the control diet (0.02). In addition, 70% of fish fed AD 2.5 achieved a high IR value (0.6 – 1.0), and this was the best result among all the treatments (AD 3.2, 60%; AD 4.3 50%; AD 5.3 and control, 10%). These results suggested that acidified diets can be used to wean <italic>O. marmorata</italic> juveniles, and the recommended pH level was 2.5.</p></abstract>

The present study aimed to evaluate the feeding performance of juvenile marble goby (Oxyeleotris marmorata) on acidified diets. Five fish meal-based diets at various pH levels (2.5, 3.2, 4.3, 5.3, and 6.0 (control)) were prepared, and each of them was fed to 10 wild-caught O. marmorata juveniles (body length 7.7–9.3 cm; each fish was placed in an aquarium, hence each dietary treatment was in 10 replicates) for 20 days. Throughout the feeding trial, O. marmorata juveniles showed clear increments in the daily ingestion ratio (IR) values of AD 2.5, AD 3.2, and AD 4.3. The control diet and AD 5.3 were almost totally rejected by the fish. On day 20, the IR of AD 2.5 (0.46) and AD 3.2 (0.36) were significantly higher (P < 0.05) than those of AD 5.3 (0.1) and the control diet (0.02). In addition, 70% of fish fed AD 2.5 achieved a high IR value (0.6 – 1.0), and this was the best result among all the treatments (AD 3.2, 60%; AD 4.3 50%; AD 5.3 and control, 10%). These results suggested that acidified diets can be used to wean O. marmorata juveniles, and the recommended pH level was 2.5.

Feeding performance of juvenile marble goby (<italic>Oxyeleotris marmorata</italic> Bleeker, 1852) fed acidified diets

Fisheries & Aquatic Life

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Feeding performance of juvenile marble goby ( Bleeker, 1852) fed acidified diets

The present study aimed to evaluate the feeding performance of juvenile marble goby (Oxyeleotris marmorata) on acidified diets. Five fish meal-based diets at...

Feeding performance of juvenile marble goby (Oxyeleotris marmorata Bleeker, 1852) fed acidified diets

Published Online: Feb 01, 2019

Page range: 211 - 216

Received: Feb 04, 2018

Accepted: Nov 14, 2018

DOI: https://doi.org/10.2478/aopf-2018-0023

Keywords
Weaning, dietary pH preference, taste, hydrochloric acid

© 2018 Archives of Polish Fisheries, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Feeding performance of juvenile marble goby (Oxyeleotris marmorata Bleeker, 1852) fed acidified diets

Published Online: Feb 01, 2019

Page range: 211 - 216

Received: Feb 04, 2018

Accepted: Nov 14, 2018

DOI: https://doi.org/10.2478/aopf-2018-0023

KeywordsWeaning, dietary pH preference, taste, hydrochloric acid

© 2018 Archives of Polish Fisheries, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Weaning, dietary pH preference, taste, hydrochloric acid