Fish co-products and its potential utalization in aqua-feed inustry

Abstract:

The study was conducted to determine the quantitative and nutritional loss from co-products (fin, intestine, scale, and gill) and plaic waste (back bone and head bone) of five fin fish species such as hilsa (Tenualosa ilisha), rohu (Labeo roilia), catla (Gibelion catla), tilapia (Oreochromis niloticus) and pangus (Pangasius pangarlus) during dressing and consumption of fish. The selected fish species was quantified in local markets and household level. Then the proximate compositions (protein, fal, ash, moisture, carbohydrate) analyzed from fish co-products and mineral compositions (calcium, iron, phosphorus) were analyzed from plate wastes. Then mixing all the by-products of each fish species to make fish co-products feed ingredient (FCI) and again proximate compositions were analyzed from the FCI at dry matter basis. The results of quantification were found that the selected fish species lost 15-25% as wastes (co-products and plate waste) and 75-85% consumed only. The proximate compositions analysis was done by AOAC method and calcium determined by titration method, iron and phosphorous was determined by using UV spectrophotometer. From the proximate composition result catla fish scale contained high protein (28.8%) compared to other fish co-products, tilapia viscera contained high lipid (30.69%), rohu scales contained high ash (21.40%). From mineral compositions analysis, calcium was found highest in catla head bone (7414.11mg/100g), iron highest in pangus head bone (77.52mg/100g) and phosphorous highest in hilsa head bone (990.48mg/100g) compared to other fish plate waste. The results from FCI were shown that catla FCI contained high protein (43.8%). This work propose that the concept of Fish In Fish Out (FIFO) can be considered with co-products utilization on aquaculture/pet feed formulation. Finally the study shown that due to containing nutrition value, fish co-products feed ingredient (FCI) could be used by the feed industry as ingredients for formulation of fish feed, poultry feed, fertilizer with low cost and reduced environmental pollution with moving to zero waste..