Abstract
Age estimates were made on otoliths of 21 juvenile swordfish, Xiphias gladius Linnaeus, captured in the Mediterranean Sea. Increments were observed in swordfish sagittae sectioned in a transverse plane and viewed with light and scanning electron microscopy. Increment counts, presumed to be daily, were made for age estimation. Estimated ages ranged from 87 to 147 days of fish ranging in size from 51 to 74 cm lower jaw fork length (LJFL). A growth rate of 2.3 cm · day −1 for the range of size of the fish was estimated. Spawning dates were estimated to occur from June 27 to August 25, which is consistent with reported times of gonad maturation and occurrence of swordfish larvae in the plankton.
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