Like other seafood products, tuna is highly perishable and sensitive to microbial spoilage. Its consumption, whether fresh or canned, can lead to severe food poisoning due to the activity of specific microorganisms, including histamine-producing bacteria. Yet, many grey areas persist regarding their ecology, conditions of emergence, and proliferation in fish. In this study, we used 16S rRNA barcoding to investigate postmortem changes in the bacteriome of fresh and brine-frozen yellowfin tuna (Thunnus albacares), until late stages of decomposition (i.e. 120 h). The results revealed that despite standard refrigeration storage conditions (i.e. 4°C), a diverse and complex spoilage bacteriome developed in the gut and liver. The relative abundance of spoilage bacterial taxa increased rapidly in both organs, representing 82% of the bacterial communities in fresh yellowfin tuna, and less than 30% in brine-frozen tuna. Photobacterium was identified as one of the dominant bacterial genera, and its temporal dynamics were positively correlated with histamine concentration in both gut and liver samples, which ultimately exceeded the recommended sanitary threshold of 50 ppm in edible parts of tuna. The results from this study show that the sanitary risks associated with the consumption of this widely eaten fish are strongly influenced by postcapture storage conditions.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1093/femsec/fiac110 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Characterization of yellowfin tuna (Thunnus albacares) skin gelatin extracted by bromelain hydrolysis and ultrasound pre-treatment.
J Food Sci
January 2025
Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Gadjah mada University, Yogyakarta, Indonesia.
Article Synopsis
- The study explores using hydrolysis of yellowfin tuna skin waste as an eco-friendly method to produce gelatin, and highlights ultrasound pre-treatment as a way to enhance extraction efficiency.
- Factors like ultrasound amplitude, pre-treatment duration, enzyme concentration, and hydrolysis time were tested to determine optimal conditions for maximizing yield and quality of gelatin, which resulted in specific optimal parameters.
- The final gelatin showed promising properties such as high viscosity, gel strength, emulsifying abilities, antioxidant activity, and good digestibility, marking a step towards sustainable gelatin production from fish waste.
Biomagnification of polybrominated diphenyl ethers and alternative halogenated flame retardants through food chains of yellowfin tuna (Thunnus albacares) and their prey from the South China Sea and the associated potential health risk.
Sci Total Environ
December 2024
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
Polybrominated diphenyl ethers (PBDEs) and their alternative halogenated flame retardants (AHFRs) have gained global attention due to their ubiquitous occurrence, bioaccumulation, and toxic properties. However, the biomagnification of halogenated flame retardants (HFRs), particularly AHFRs, in various food chains is not yet well understood. In this study, yellowfin tuna (Thunnus albacares), along with its prey, flying squid (Sthenoteuthis oualaniensis) and round scad (Decapterus maruadsi), were sampled from the South China Sea (SCS) to investigate the biomagnification potential of PBDEs and AHFRs, including dechlorane plus (DP) and decabromodiphenyl ethane (DBDPE).
View Article and Find Full Text PDFThe Impact of Acute Ammonia Nitrogen Stress on the Gill Tissue Structure and Antioxidant Ability of Gills and Red and White Muscle in Juvenile Yellowfin Tuna ().
Antioxidants (Basel)
November 2024
Key Laboratory of Efficient Utilization and Processing of Marine Fishery Resources of Hainan Province, Sanya Tropical Fisheries Research Institute, Sanya 572018, China.
To explore the impacts of acute ammonia nitrogen (NH-N) stress on gill structure and the antioxidant ability of red and white muscles in juvenile yellowfin tuna (), this study used natural seawater as a control, establishing two experimental NH-N groups at 5 and 10 mg/L. Gills and red and white muscle were taken at 6, 24, and 36 h for the determination of malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GHS-PX) levels, and to observe gill structure. The results indicated that, with increasing time, the MDA concentration and CAT activity in the gills of the 5 mg/L group showed a trend of first increasing and then decreasing, while SOD activity exhibited a downward trend.
View Article and Find Full Text PDFDevelopment of Single-Nucleotide Polymorphism (SNP)-Based Species-Specific Real-Time PCR Assays for Authenticating Five Highly Priced Tuna.
Foods
November 2024
Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China.
Tuna are economically important as food resources in food markets. However, because tuna is often processed into steaks or fillets, the meat can be difficult to identify through morphological features. For effective fishery management and to protect the rights of consumers, it is necessary to develop a molecular method to accurately identify the species used in tuna products.
View Article and Find Full Text PDFThe Impact of Acute Ammonia Nitrogen Stress on Serum Biochemical Indicators and Spleen Gene Expression in Juvenile Yellowfin Tuna ().
Animals (Basel)
October 2024
Key Laboratory of Efficient Utilization and Processing of Marine Fishery Resources of Hainan Province, Sanya Tropical Fisheries Research Institute, Sanya 572018, China.
The presence of ammonia nitrogen in water has a significant impact on the serum and spleen of fish, potentially leading to changes in substances such as proteins in the serum while also causing damage to the immune function of the spleen. To investigate the effects of ammonia nitrogen (NH-N) stress on juvenile yellowfin tuna (), this study established three NH-N concentrations, 0, 5, and 10 mg/L, denoted as L0, L1, and L2, respectively. Serum and spleen samples were collected at 6, 24, and 36 h.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!