Aquaculture America 2020

February 9 - 12, 2020

Honolulu, Hawaii

EFFECTS OF NEPALI LAPSI Choerospondias axillaris (Roxb.) FRUITS EXTARCT ON GROWTH PERFORMANCE AND PROTEIN METABOLISM IN RAINBOW TROUT Oncorhynchus mykiss

Shyam Narayan Labh*, Shubha R. Shakya
Department of Zoology, Amrit Campus, Tribhuvan University, Kathmandu 44600, Nepal
labhsn@amritcampus.edu.np
 

Lapsi (Choerospondias axillaris ) is a large, deciduous fruit-bearing tree of Nepal. Fruit extracts of lapsi possessed high antioxidant activity. Therefore, our goal of the study was  to  evaluate the  dietary  effects of lapsi fruits extracts on growth performance and protein metabolism in  rainbow trout (Oncorhynchus mykiss) . A total of 450 rainbow trout (37.24 ±  0.39 g) were  randomly  distributed into six groups with three replicates (25  fish per cage), fed six practical diets ( isonitrogenous diet  40% protein)  such as control diet without the lapsi extract (D1) and the other five diets containing incremental level of lapsi fruits extract  at the rate of 100 (D2), 200 (D3), 400 (D4), 800 (D5) and 1600 (D6) mg kg-1 . Fish were fed twice per day at satiation level for 90 days.

Results of the study showed that  supplementation of  lapsi fruits extracts  significantly affects (P<0.05) the growth performance and nutrient utilization in fish. H ighest growth was observed in  D4 (440 ppm) fed group whereas lowest value was found in control (D1) but feed conversion ratio (FCR) exhibited opposite trend. Growth results were concurred with protein profile content of serum (protein, albumin and globulin) in fish.

Conclusively, lapsi fruits can be used  as an additive  in trout diet to enhance the  fish growth for sustainable aquaculture.

Keywords : Lapsi, rainbow trout, growth , protein