Age and growth of damselfish Chromis notata (Temminck & Schlegel, 1843), Jeju Island, Korea

Abstract

This study investigated the age and growth of damselfish, Chromis notate, from Jeju Island in Korea. Samples were collected monthly by lift net from September 2013 to August 2014. Total lengths of the damselfish ranged from 6.4 to 15.3 cm. The relationship between total length and wet weight was WW = 0.0125TL3.1631 for females, and WW = 0.0091TL3.2769 for males. The slopes in the relationship between length and weight were not significantly different between sexes, but were significantly different in the intercepts. There were more female than male specimens (1.3:1). Age determination was conducted using the otoliths. Marginal increment (MI) declined in summer and winter, which suggests that two rings are formed each year. Ages of sampled individuals ranged from 1 to 5 years. Length-at-age data were fitted using the von Bertalanffy growth model. The estimated growth functions were Lt = 19.93 [1 − exp−0.21 (t + 0.811)] total length and wet weight was females, and Lt = 16.47 [1 − exp−0.32 (t + 0.499)] for males.