Growth and reproduction in the protogynous hermaphrodite Pseudolabrus celidotus(Pisces:Labridae)in New Zealand

摘要: The wrasse Pseudolabrus celidotus was sampled regularly at two areas, Leigh and Wellington, over 18 months. It is found to be protogynous monandric, but a small proportion both areas change sex within the initial phase (IP) immediately prior maturity. IP males have high testes weights relative terminal (TP) appear functionally analogous primary males. They grow same rate as normal hermaphrodites (which color almost synchronously) tend smaller size may better survival rate. spawning season lasts from late July until end of November, occurs between November May. Color often slightly delayed with respect this period. Some during season. Growth slower Wellington first year only associated much larger recruitment. As consequence maturity, which reached 0+ Leigh, largely 2+ Wellington. In maturity critical 100-110 mm SL, although for Although actual densities are higher effective = 13 per 500 m2 areas. Normal sex/color significantly Leigh. However, because growth difference, changes occur younger age. average mature female shorter There 3.7 females each TP male opposed 8.7 mean weight ripe ovary available similar. Sex always more closely related than age, fecundity. results discussed in relation preliminary observations social behavior, Warner's (1975a) model predicting optimal schedule.