3.3. TVBN
The changes in TVBN during fermentation of salted fish
samples added without (control) or with starter culture of B.
polymyxa are shown in Fig. 5. The initial TVBN content of
salted fish samples was 12.35 mg/100 g. The levels of TVBN in
control samples increased rapidly during fermentation time,
reaching 155.5 mg/100 g at the end of fermentation (Day 120).
In inoculated samples, the TVBN levels only gradually
increased during fermentation time, reaching 86.7 mg/100 g at
the end of fermentation (Day 120). In other words, TVBN levels
of control were significantly (p < 0.05) higher than inoculated
samples at each sampling time (Fig. 5). TVBN, including trimethylamine,
dimethylamine, and ammonia, is one of the
most widely used indicators for fish quality and spoilage [28].
Hernandez-Herrero et al [29] proposed that the increase of
TVBN value in salted anchovies during ripening was due to
proteolytic bacteria and porteolytic enzyme actions. Zaman