Is Mushy Tuna Syndrome a Growing Problem for the Tuna Industry?

Area of Science:

• Marine Biology
• Fisheries Science
• Food Science

Background:

• Food loss and waste threaten global food system sustainability and resource efficiency.
• Tuna is vital for nutrition, but flesh quality issues like Mushy Tuna Syndrome (MTS) cause significant catch loss.
• MTS renders tuna flesh soft and pasty, making it unfit for consumption and leading to material wastage.

Purpose of the Study:

• To investigate the global prevalence and economic impact of Mushy Tuna Syndrome (MTS) in the tuna industry.
• To identify the primary tuna species affected by MTS and understand industry perceptions of its causes.
• To highlight the need for strategies to mitigate MTS-related losses and enhance resource efficiency.

Main Methods:

• A global industry survey using questionnaires was conducted.
• Responses were gathered from 32 companies across 14 nations.
• Data on MTS prevalence, affected species, economic costs, rejection rates, and perceived causes were collected.

Main Results:

• 97% of surveyed companies acknowledged MTS as an issue, predominantly affecting skipjack tuna (Katsuwonus pelamis).
• Economic costs varied widely, with a median of over $60,000 USD annually and an average rejection rate of 1.8%.
• MTS occurrence was seasonal (summer months), with over half of affected companies reporting an increasing trend.

Conclusions:

• Mushy Tuna Syndrome (MTS) is a prevalent issue in the global tuna industry, causing significant economic losses.
• Industry perceptions link MTS to environmental, physiological, and biological factors.
• There is a critical need to develop amelioration strategies for fishers and processors to reduce losses and maximize resource efficiency.