Publication Abstract

The effect of various processing methods on the physical and biochemical properties of shrimp head meals and their utilization by juvenile Peneaus monodon Fab

The effect of various processingmethods on the physical and biochemical properties of shrimp head meals and theirutilization by juvenile Peneaus monodon Fab

C.J. Fox, P. Blow, J.H. Brown and I. Watson

Threemeals were prepared from Penaeus monodon head waste by drying the raw material ina solar simulator, drying in an oven or blanching the raw material followed by partialde-watering under pressure and air drying. A further three meals were prepared by passingbatches of raw or blanched shrimp head waste through a commercial meat/bone separator. Themeat fraction was subsequently dried (MBDD) or ensiled. Separated meals contained around6% less ash, 5% less chitin and 7.5% more protein than unseparated meals but the procedurefailed to remove all the exoskeletal material. Separated meals also contained higherlevels of astaxanthin and canthaxanthin than solar or oven-dried meals. The highest levelsof n-3 polyunsaturated fatty acids (PUFAs) were found in separated meals. However,blanching the raw material prior to processing led to decreased PUFA content, higher freefatty acid levels and significantly higher (P<0.05) peroxide values. All the meals werefound to be deficient in arginine and methionine plus cystine but separated mealscontained greater quantities of the remaining essential amino acids and had essentialamino acid indices greater than 0.70. Experimental rations were prepared incorporatingeither 54% fish meal or 31% of the solar-dried, oven-dried or MBDD shrimp head meals plussufficient fish meal to generate isoproteinaceous diets. Each diet was fed to triplicategroups of 40, juvenile Penaeus monodon in a 50-day growth trial. Diets containingshrimp head meal performed significantly (P<0.05) better in terms of final individualweight, feed conversion ratio and production compared with the 54% fish meal based diet.

Reference:

C.J. Fox, P. Blow, J.H. Brown and I. Watson, 1994. The effect of various processingmethods on the physical and biochemical properties of shrimp head meals and theirutilization by juvenile Peneaus monodon Fab. Aquaculture, 122: 209-226.

C.J. Fox*, P. Blow, J.H. Brown and I. Watson

Aquaculture, 122: 209-226