Estimation of nutritional post-harvest loss of catla (Gibelion catla) in bangladesh

Abstract:

Present investigation brings to pass to determine the quantitative, and nutritional loss from by-products and plate waste of catla (Gibelion catla) during consumption of fish. The market survey was conducted in three fish market (Sonapur, Datterhat and Municipal market) of Noakhali Sadar Upazilla, over a period of three months (May to July 2018). About 42 fish species were found in these markets and top 10 species were selected for the study. Within the 10 species Gibelion catla was selected randomly. At that point the proximate analysis ware done in Fish Technology Laboratory, BCSIR, Dhaka. Amid the present study, the average weight of selected fish species was 733.56±182.55g. The average dressing percentage of that table fish were gill 4.92 ±0.17%; intestine 3.97±0.03; fin 3.0±1.41%; scale 4.08±0.09% in respectively. Average 84% of fish in volume to raw weight was obtained for cook and after consumption hard bone plate waste was 3.1±0.25% (male), 4.19±0.30 % (female), 6.0±0.25 % (child) in total raw based and 4.0±0.15 % (male), 6.11±0.13% (female), 10.1±0.2% (child) in ready to eat based. Soft bone plate waste was 2.0±0.11% (male), 4.1±0.15% (female), 6.1±0.15% (child) in total raw based and 3.9±0.10% (male), 6.2±0.06% (female), 9.12±0.1% (child) in ready to eat based. Operculum bone plate waste was 3.2±0.3% (male), 4.92±0.02% (female), 7.1±0.23% (child) in total raw based and 6.05±0.1% (male), 7.9±0.2% (female), 11.1±0.2% (child) in ready to eat based. Finally, it was estimated that average 68% fish can be consumed whereas in fin 3%, scale 4%, intestine 4%, gill 5%, hard bone 5%, soft bone 5%, operculum bone 6% was thrown away as by-products and plate waste. The minerals found in hard bone 7461.45±1.76 mg/100g Ca, 57.33±1.11 mg/100g Fe, 21.6±1.08 mg/100g Mg, 124.52±0.82 mg/100g P respectively. Soft bone contained 5011.06±1.83 mg/100g Ca, 10.81±0.43 mg/100g Fe, 23.5±1.2 mg/100g Mg, 108.99±0.02 mg/100g P respectively. Operculum bone contained 5919.28±1.44 mg/ 100g Ca, 139.48±1.46 mg/100g Fe, 19.7±0.99mg/100g Mg, 50.67±1.42 mg/100g P respectively. The total annual production of catla in Bangladesh was 224191 MT (DoF, 2017) and it was estimated that 64534.83 MT loosed as by-products and plate waste from which total protein lost was estimated approximately 1616.73 MT and the total value of by-products was approximately 19354.2 million BDT. The study was plainly demonstrated the potential nutritional significance of `the fish by-products and plate waste