Trigloporus lastoviza. In: Sartor P., Mannini A., Carlucci R., Massaro E., Queirolo S., Sabatini A., Scarcella G.

Few data are available on Trigloporus lastoviza biological cycle characteristics in the Italian seas. Trigloporus lastoviza, streaked gurnard, morphology, ecology, diet, biology, growth, sexual maturity and reproduction, recruitment, evaluation, stock assessment. Females reach larher sizes than males in middle-northern Adriatic Sea and in other areas. In the Adriatic Sea, it is reported a size between 11 and 26 cm TL with a main cohort at 16 cm TL. The estimated maximum age is of 5 years for both males and females; 6 and 8 years for males and females respectively in the Greek Aegean Sea; 6 and 5 years in the Turkish Aegean Sea 4 and 5 years in the Tunisian Aegean Sea. From a comparison between the regression parameters of the length-weigth relationship in different areas, there is evidence of an an increase of b values with latitude, from North to South. In the Italian seas, T. lastoviza spawns in summer. In the Greek Aegean Sea reproduction occurs between winter and early spring. In the Gulf of Tunis, gonadal maturation occurs from September to December and spawning takes place from late December to January for both sexes. In the middle-northern Adriatic Sea, streaked gurnard recruits (<11 cm TL estimated according to Bhattacharya’s method, 1967) ) were found mainly along the North-eastern coast; the area showing the highest persistence in time of recruits was identified off the the Pag Island. A decrease in the number of recruits was observed with time, with a mean value of 4 recruits per km2.