Abstract
Seasonal histological changes were monitored in the course of one year to describe the development of the gonads of Pagellus acarne, collected in the Strait of Messina. This species is a protandric hermaphroditic fish bearing ovotestes, where the testis and ovary are segregated in two separate portions. One hundred and forty specimens of P. acarne, measuring from 18 to 22 cm in body length, were sampled with monthly periodicity. Both gona‐dosomatic index computation and histological monitoring reveal that spawning occurs in summer. The sex ratio is 2.1:1 in favour of males.
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