Age and growth of the small red scorpionfish, Scorpaena notata Rafinesque, 1810, based on whole and sectioned otolith readings

摘要

Age and growth of Scorpaena notata from the northern Adriatic Sea were investigated by annual growth increment counts (annuli). Overall, age and growth were estimated from 538 specimens of S. notata ranging between 47 and 199 mm TL. No clear sexual dimorphism in size was observed. Annual deposition of annuli and location of the first annulus have been validated by edge analysis and daily growth increment counts, respectively. The estimated age range was between 0–16 years for female and 0–14 years for males. The estimated values of Von Bertalanffy asymptotic length textL_¥ {{text{L}}_{infty }} (cm) and k (years−1) were 16.3 and 0.46 for males and 15.6 and 0.35 for females. Thus, males of S. notata appeared to attain a slightly larger size at faster rate than females. The growth performance index ranged between 1.9 and 2.1, which is in the middle of the range observed in other scorpaenids. Comparing ageing data of S. notata with other Mediterranean scorpaenids, a direct relationship between fish size and growth performance was observed.