ABSTRACT

The occurrence of protandry is not as prevalent as protogyny; it is limited to 21 genera belonging to Platycephalidae, Centropomidae, Sparidae, Pomacentridae, Gonostomatidae, Muraenidae (Sadovy de Mitcheson and Liu, 2008). Among the protandrous hermaphrodites, monogyny is common but digyny is limited to only a few species like Lates calcarifer. Correspondingly, literature available on protandry is relatively very limited. Yet, being candidate species for aquaculture, the black porgy Acanthopagrus schlegeli (e.g. Chang et al., 1991), L.calcarifer (e. g. Guigen et al., 1993) and Amphiprion spp. (e.g. Godwin and Thomas, 1993) have received much attention to induce sex reversal through administration of one or another steroid.