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Vegetable Processing Wastes as Dietary Ingredients for the Striped Catfish Pangasianodon hypophthalmus: A Case Study

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Author Affiliations

  • 1School of Aquaculture and Biotechnology, Kerala University of Fisheries and Ocean Studies, Panangad, Kochi, Kerala, INDIA
  • 2School of Aquaculture and Biotechnology, Kerala University of Fisheries and Ocean Studies, Panangad, Kochi, Kerala, INDIA
  • 3School of Aquaculture and Biotechnology, Kerala University of Fisheries and Ocean Studies, Panangad, Kochi, Kerala, INDIA
  • 4School of Aquaculture and Biotechnology, Kerala University of Fisheries and Ocean Studies, Panangad, Kochi, Kerala, INDIA

Res. J. Animal, Veterinary and Fishery Sci., Volume 4, Issue (1), Pages 1-7, January,24 (2016)

Abstract

All food processing industries generate wastes of varying nature in significant quantities. Managing these wastes so as to minimise the impact on the environment is a prime concern. The concept of waste has undergone much change in recent times, with the focus being on utilising the waste materials as inputs for generation of new or reusable products. Vegetable wastes are generated in significant quantities and are easily available at minimal charge. The possibility of utilising vegetable waste as a dietary ingredient was assessed employing the striped catfish as the test species. The study was conducted over a period of 90 days. Vegetable waste was incorporated at inclusion levels of 5, 10 and 15 % in formulated diets. The three test diets were designated T1, T2 and T3 respectively. A clam meal based diet devoid of vegetable waste served as the control (T0). Feeding was done once daily @ 5% of the body weight. The water quality parameters like dissolved oxygen, water temperature pH, total alkalinity, ammonia, nitrite and nitrate as well as growth response were monitored at fortnightly intervals. The quality of water was maintained by periodic partial replenishment over the period of study. On termination of the trial, better growth response was recorded in the T1 treatment containing 5% level of vegetable waste. The initial average weight and length of fishes in T0, T1, T2 and T3 were 6.16 g, 7.14 g, 6.22 g and 7.40 g and final average weight was recorded 17.69, 19.19, 16.79 and 13.46 respectively. Utilisation efficiency was also found to be superior in the T1 diet as evidenced by the best food conversion ratio of 1.81. Fish fed with T3 diet recorded the lowest Food conversion ratio of 2.35. Specific growth rate (%) was better in Pangasianodon hypophthalmus fingerling fed the control diet. Survival rate of the striped catfish was unaffected by vegetable waste meal supplementation. Organoleptic quality of fish was not affected adversely by vegetable waste incorporation in the diet. The results suggest the possibility of utilising vegetable waste meal in diets for the striped catfish at low levels of incorporation. Further studies on the use of ensiled vegetable waste in diets for the striped catfish are warranted.

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