Environmental Science
8 years ago

Tuna behavior near fish aggregating devices reveals optimal fishing distances.

Aquatic Living Resources
Behaviour of yellowfin tuna (Thunnus albacares) and skipjack tuna (Katsuwonus pelarnis) around fish aggregating devices (FADs) in the Comoros Islands as determined by ultrasonic tagging
Patrice Cayré

Paper Summary

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Tuna were tagged with special devices to track their movements around fish aggregating devices (FADs) in the Comoros Islands. Yellowfin tuna were found to swim deeper during the day than at night, with some showing a preference for FADs. Skipjack tuna, on the other hand, did not show a clear association with FADs and displayed more variable behavior. The distance between FADs was found to affect tuna attraction, with an optimal distance of 11 nautical miles. These findings could help improve fishing and monitoring efforts in the future.