White seabream anomalies

In recent years, a weird phenomenon seems to affect the common white seabream (Diplodus sargus). Professionals (fishermen, fishmongers) and sport fishermen (hunters and fishermen) from the Mediterranean coast of Spain, France, Italy and Tunisia have reported the capture of white seabreams that after cooking become "like a tire" and inedible. The phenomenon is neither related to the freshness of the fish nor to the way it has been conserved or cooked. One study related it to the intake of invasive algae, but the origin and cause of the phenomenon are quite unknown.

At the University of Girona we are analysing this problem. The purpose of our survey is to collect more information to better understand the extent of the phenomenon.

If you have observed similar cases during your outings, you are invited to complete the short questionnaire below.

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* 1. HAVE YOU OBSERVED THIS PHENOMENON

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* 2. ON WHICH SPECIES?

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* 3. Please add information about

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* 4. Are there remarkable structures or elements near your fishing area? (nautical port, fishing port, aquaculture, river, marine outfall, invasive algae ...)

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* 5. NAME OF THE OBSERVER

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* 6. email (if possible) to contact for more information

Thank you very much for your help,
M.Casadevall, R.Merciai, C.Rodríguez-Prieto.
www.udg.edu

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