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OJVRTM

Online Journal of Veterinary Research  

  15 (4): 354-365, 2011. Redacted 2017.


Nisin as preservative for rainbow trout (Onchorynchus mykis)

 

Soltanian S1 (DVM, PhD), Behnam S 2* (MSc), Rezai M 2 (PhD), Safari R3 (MSc), and Anvari M2 (MSc)

 

1Aquatic Animal Health & Diseases Department, School of Veterinary Medicine, Shiraz University, Shiraz, 2Department of Fisheries, Faculty of Fisheries and Natural Resources, Tarbiat Modares University, Noor,

3Caspian Sea Ecology Research Institute, Sari, 4847153948, Iran

 

ABSTRACT

 

Soltanian S, Behnam S, Rezai M, Safari R, Anvari M., Nisin as preservative for rainbow trout (Onchorynchus mykis), Onl J Vet Res., 15 (4): 354-365, 2011. Chemical and microbiological changes in vacuum-packaged slices of rainbow trout (Onchorynchus mykis) treated or not treated (controls) with nisin (0.2 % w/w) samples were evaluated for 16 days at 4 C. The peroxide value (PV), thiobarbituric acid value (TBA) and total volatile basic nitrogen (TVB-N) remained within standard acceptable levels of 6.21 meqkg-1, 0.71 mgkg-1 and 24.81mg 100g-1, respectively, whereas the same values were exceeded in untreated control samples. Nisin significantly (p<0.05) lowered the number of psychrotrophic, mesophilic and lactic acid bacteria (LAB) compared with controls (5.35 log, 1.57 log, and 6.3 log vs. 6.82 log, 5.35 log and 7.84 log, respectively. The results suggest that nisin could be used to extend the shelf-life of filleted rainbow trout.

 

Key words: rainbow trout; nisin; vacuum packaging; shelf-life.

Raw Data file provided.


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