Abstract:

The effect of high hydrostatic pressure (HHP) treatment in preserving the quality of cultured large yellow croakers
was studied in this paper. Changes in pH, aw, TVB-N, TBA, TMA and TVC were analyzed after HHP treatments under
various conditions s (100, 200, 300, 400 or 500 MPa for 10 or 15 min) and after subsequent storage at 4 ℃. The results
showed that increased pressure could result in an increase in pH and TBA, a reduction in aw and TVB-N, a slight rise in
TMA and a significant decrease TVC in cultured yellow croakers. During 45 days of cold storage, pH and aw in HHP treated
cultured yellow croakers increased firstly and then decreased. HHP treatment at 500 MPa for 15 min could effectively
control TVB-N and TMA, which were increased to a level not exceeding 35 and 5 mg/100 g at the end of storage (45 days),
respectively. Meanwhile, this treatment resulted in a TVC value of 5.7 × 104 CFU/mL in large yellow croakers. Based on
these results, HHP treatment at 500 MPa for 15 min is optimal for preserving the quality of large yellow croakers.

Key words: cultured Pseudosciaena crocea, high hydrostatic pressure, preservation, effect