Sangkuriang catfish (Clarias gariepinus) is one of freshwater fish which gives low gelling capacity due to its high content of sarcoplasmic protein and lipid contents. Catfish surimi was made into fish sausage with tapioca starch as filler and seaweed powder as gelling agent. Seaweed Eucheuma cottonii have ability to increase gelling properties because of its hydrocolloid content, carrageenan. In this research, different concentrations of E. cottonii seaweed powder were added to fish sausage. E. cottonii powder improved gel strength (1816.69 g.cm), WHC (88.67%) of fish sausage without giving any effect to the sensory properties of fish sausage (aroma, flavor, off-flavor, color). The best concentration of E. cottonii powder adding was 0.50%. Fish sausage added with seaweed powder (0.50%) had comparable WHC, gel properties (gel strength, biting and folding test) and sensory properties with commercial fish sausage marketed in Indonesia. Furthermore, fish sausages added by either seaweed powder had higher whiteness degree, whiter color, and higher dietary fiber content compare to commercial fish sausage.
Ikan lele (Clarias gariepinus) memiliki kandungan lemak dan protein sarkoplasmik yang tinggi, berakibatpada rendahnya kemampuan pembentukan gel ikan lele. Perlakuan pencucian bertujuan meningkatkankualitas gel ikan lele. Hasil percobaan menunjukkan bahwa pencucian satu tahap memberikan kekuatangel 1.560,23 g.cm; daya ikat air 81,30%; dan derajat keputihan 59,00%. Surimi ikan lele kemudian dibuatmenjadi sosis ikan dengan tepung tapioka sebagai bahan pengisi dan tepung rumput laut G. gigas sebagaigelling agent. G. gigas dapat meningkatkan kualitas gel sosis ikan karena kandungan hidrokoloid agaryang dikandungnya. Tepung G. gigas meningkatkan kekuatan gel (1.831,32 g.cm), daya ikat air (88,19%)dari sosis ikan lele tanpa memberi perubahan terhadap kualitas sensori (aroma, flavor, bau asing, warna)sosis ikan. Sosis ikan lele yang diberi penambahan tepung G. gigas (0,50%) memiliki kualitas gel (kekuatangel, hasil uji lipat, dan uji gigit), daya ikat air, dan kualitas sensori sebanding dengan sosis ikan komersialIndonesia. Sosis ikan lele dengan tepung rumput laut juga memiliki kandungan serat pangan yang lebihtinggi dibandingkan dengan sosis ikan komersial.Kata kunci: Gracilaria gigas, ikan lele, sosis ikan, tepung rumput laut
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