Climate Change & Environment


Princes is committed to the long-term sustainability of the tuna used in all of our products.

Our goal is to source all of our tuna from fisheries that are Marine Stewardship Council (MSC) certified or in a time bound Fishery Improvement Project (FIP) with the objective of MSC certification.


All tuna is fully traceable on request back to boat from can code – i.e. each can code links back to specific catch certificates that demonstrate the location and dates of the fishing voyage along with the avoidance of Illegal, Unreported and Unregulated (IUU) fishing.

Princes tuna avoids transshipment at sea – one of the most effective means of avoiding IUU fishing and associated labour standards issues including modern slavery. Additionally, Princes does not source tuna from longliner vessels.

Our Indian Ocean FIP fish is from a fixed list of 42 European owned purse seiner vessels. These represent an inherently low risk from a labour standards perspective.

Ensuring Ethical Supply Chains

The integrity of our supply chain is of paramount importance, and we remain committed to our ongoing collaborative approach to ensure the long-term sustainability of the tuna fisheries we source from.

Over a decade ago, Princes Tuna Mauritius (PTM) Riche Terre was the first global supplier of canned tuna to hold the SA8000 certification for social accountability.

The SA8000 certification provides a measurable, international standard in working conditions and practices.

It forms part of our ongoing commitment to developing our workforce and ensuring the highest standards of workplace conditions are met.

We do not permit the use of transshipment at sea or long line vessels in our supply chain due to the inherent risks they represent.


The MSC is a globally recognised certification programme for sustainable seafood and it is our policy to source MSC certified seafood wherever possible.

The MSC has three principles required from a fishery in order to meet its standard:

  • Fishing activity must be at a level which ensure sot can continue indefinitely
  • Operations mush be managed to maintain the structure, productivity, function and diversity of the ecosystem
  • Compliance with relevant laws and have a management system that is responsive to changing circumstances

ISSF and Fisheries Management

As one of the founding partners of the International Seafood Sustainability Foundation (ISSF), Princes plays an active leadership role in the organisation’s important work and projects. WWF, one of the world’s largest and most respected independent conservation organisations, is also a founder partner of the ISSF. ISSF’s current (2018-22) strategic plan has four core areas of focus:

  1. Science: Advance the sustainability of tuna stocks and their ecosystems through continuous improvement – measurably demonstrated – across global tuna fisheries.
  2. Influence: Exercise influence among stakeholders to promote and expedite actions necessary to advance the sustainability of tuna stocks and their ecosystems.
  3. Verification: Maintain and enhance credibility through transparency and compliance.
  4. Support FIPs: Act as an enabler across all areas of focus, seeking to expedite the achievement of MSC certification standards without conditions across global tuna fisheries.
    The ISSF calls on the relevant Regional Fishery Management Organisations to improve tuna fisheries and Princes fully supports these calls to action. Princes is audited annually against ISSF’s conservation measures – our 2018 report (published April 2019) found us to be fully compliant for the third year in a row.

The ISSF calls on the relevant Regional Fishery Management Organisations to improve tuna fisheries and Princes fully supports these calls to action. Princes is audited annually against ISSF’s conservation measures. We are fully compliant.


We are a founding member of the Indian Ocean FIP and a signatory to a Memorandum of Understanding (MoU) for the launch of the pole and line tuna FIP in Senegal. The FIPs represents a significant financial investment by Princes and meet WWF’s criteria for credible FIPs including the involvement of all key parties (fishing vessels, processors, Non-Governmental Organisations and government agencies), a time limit of five years and the adoption of scientific advice to better manage the fishery against the MSC’s three principles.

Priorities for the Indian Ocean tuna FIP include:

  • Recovery of the yellowfin stock and the adoption of Harvest Control Rules for all main tuna species.
  • Improved FAD management.
  • Working with Governments to improve the management of the fishery.