Affiliation:
1. University of Rajshahi
Abstract
Abstract
The present study was conducted to investigate the effects of three plant-based dietary pigment sources on the growth, carotene deposition, muscle quality, and palatability of Barbonymus gonionotus. A 90-day feeding trial was conducted in twelve cages under four treatments and three replicates. A commercial feed was used as control (CF), where three other feeds were formulated by adding 2% tomato (TM), carrot (CR), and beetroot (BR) powder to the commercial feed. Fifteen B. gonionotus juveniles with average weight ranging from 75.31 ± 6.43g to 76.44 ± 6.51g were stocked in each cage and the experimental feeds were supplied at 5% of their body mass. Fish were sampled fortnightly and growth and feed utilization indices were estimated at the end of the trial. The highest mean weight gain (193.89 ± 12.31g) and specific growth rate (1.41 ± 0.08%) were found in CR while the lowest in CF (124.35 ± 9.20g and 1.07 ± 0.07%). No significant difference was found in the survival rate among the treatments. CR also showed the best feed conversion (1.59 ± 0.16), and protein efficiency ratio (3.07 ± 0.31) followed by TM, BR, and finally CF. Significantly higher carotenoid content was recorded in CR (4.31 ± 0.30mg/g) while the lowest was found in CF(0.29 ± 0.19mg/g). Results of proximate composition analysis of fish muscle showed no significant difference across the treatments. For the palatability test, a significantly higher organoleptic score was recorded in CR (25.54 ± 0.57) while the lowest was found in CF (19.52 ± 0.77). The study concludes that 2% carrot powder supplementation in feed is more suitable for enhancing the growth, flesh color, and palatability of B. gonionotus.
Trial Registration No.: RU-MSR1611067151
Publisher
Research Square Platform LLC
Reference24 articles.
1. Influence of various dietary synthetic carotenoids on biodefense mechanism in rainbow trout (Oncorhynchus mykiss Walbaum);Amar EC;Aquaculture Research,2001
2. AOAC (2005) The Official method of Analysis, 18th ed. Association of Official Analytical Chemists International. Arlington, Virginia, USA
3. Evaluation of fresh Azolla pinnata as a low-cost supplemental feed for Thai Silver Barb Barbonymus gonionotus;Das M;Fishes,2018
4. DoF (2020) Yearbook of Fisheries Statistics of Bangladesh, 2019-20. Fisheries Resources Survey System (FRSS), Department of Fisheries. Bangladesh: Ministry of Fisheries and Livestock
5. Marigold as a carotenoid source on pigmentation and growth of red swordtail, Xiphophorus helleri;Ezhil J;Turkish Journal of Fisheries and Aquatic Science,2008