Eutrigla gurnardus. In: Sartor P., Mannini A., Carlucci R., Massaro E., Queirolo S., Sabatini A., Scarcella G., Simoni R., (eds). Synthesis of the knowledge on biology, ecology and fishery of the halieutic resources of the Italian seas.

The biology of the species in the Italian seas is little known. In the North-central Adriatic Sea a maximum size of 29 cm TL is reported for this species. The most common sizes reported for trawling surveys in the North-central Adriatic Sea range from 8 cm to 14 cm TL. Maximun age was estimated in 5 and 8 years for males and females, respectively, in the Aegean Sea and 3 and 4 years in the Aegean Sea. In Atlantic Ocean (France) maximum age was esimated in 15-16 years. Length-weight relationship parameters may vary according to age (juveniles and adults specimens) and sex. There is evidence of an increase in b values with latitude, from North to South. Reproduction takes place from early spring to August. In the northern-middle Adriatic Sea, males attain sexual maturity at smaller sizes than females: 50% of males attain maturity at around 12.2 cm TL, while 50% of females at around 15.0 cm TL. Sexual dimorphism related to size at maturity can be found also in other geographical areas, with clear differences in the size associated with latitude). In the northern-middle Adriatic Sea, grey gurnard recruits (<10 cm TL) were generally detected in the whole range of distribution of the species, although juveniles were mostly concentrated in the middle Adriatic Sea. The area showing the greatest persistence of recruits was found north of the meso-Adriatic Pit around the 100 m bathymetric line.