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Interannual fine-scale site fidelity of male ballan wrasse Labrus bergylta revealed by photo-identification and tagging.

The site fidelity of ballan wrasse Labrus bergylta was studied using photo-identification and external tagging. Five male individuals were observed to defend the same small territory composed of a few rocks during several reproductive seasons spanning 2 to 15 years. These results provide one of the strongest indications of long-term very fine-scale site fidelity in marine fishes. This article is protected by copyright. All rights reserved.