Abstract
Age and growth of swordfish Xiphias gladius L. were estimated using cross-sections from the second anal fin spine of 974 animals sampled from commercial longline catches in the Aegean Sea. Using this method 90% of all spine sections were aged satisfactorily, although readability declined in the larger size classes. A significant linear relationship was found between fin spine radius and lower jaw fork length (LJFL=60.92+23.37 5). The von Bertalanffy growth equations for length of males and females were L t =193.85[1- exp(-0.34) (t+1.22)] and L t =220.12[1- exp(-0.25) (t+1.52)] respectively. These results indicate that females grow faster than males after an estimated age of 3 years. There was no significant difference in the length-weight relationship between males and females.
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