Feeding frequency for dusky grouper Epinephelus marginatus juveniles with automatic feeding system
Autor: | Nayara Yoshimini de Oliveira, Otávio Mesquita de Sousa, Vanessa Villanova Kuhnen, Eduardo Gomes Sanches |
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Rok vydání: | 2019 |
Předmět: |
0303 health sciences
biology business.industry Epinephelus marginatus Aquatic animal 04 agricultural and veterinary sciences Aquatic Science biology.organism_classification Salinity 03 medical and health sciences Animal science Productivity (ecology) Aquaculture 040102 fisheries medicine 0401 agriculture forestry and fisheries Grouper Mariculture medicine.symptom business Weight gain 030304 developmental biology |
Zdroj: | Aquaculture Research. 50:3009-3016 |
ISSN: | 1365-2109 1355-557X |
Popis: | Salt‐water recirculation systems using automatic feeders are a new frontier for marine aquaculture. The definition of the feed frequency is fundamental for the correct use of automatic feeders. Different feeding frequencies (1, 3, 6, 12 and 18 times a day) using automatic feeders were evaluated in two experiments on the performance of the dusky grouper (Epinephelus marginatus) in salt‐water recirculation system. In the first experiment, three feeding frequencies were evaluated: feeding once a day; three times a day and six times a day. In the second experiment, three feeding frequencies were evaluated: feeding six times a day; 12 times a day and 18 times a day. Waters parameters (temperature, salinity, oxygen level, total ammonia, pH and oxidation‐reduction potential) were maintained at specific ranges for the species. Among all the evaluated frequencies, 12 times a day provided the best productive performance, obtaining superior results for final weight, final biomass, specific growth rate and daily weight gain. For juveniles of the dusky grouper, the ideal feeding frequency is regular feedings every 2 hours, which is impractical to run without the use of automatic feeders. |
Databáze: | OpenAIRE |
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