This study describes the developmental process of gonads in chameleon goby, Tridentiger trigonocephalus from the stage of hatching to 100 days after hatching (DAH). Based on histological observation, the primordial germ cells were observed in mesentery between mesonephric duct and gut at 15 DAH (total length, TL: 6.8±0.2 mm). At 20 DAH (TL: 7.9±0.1 mm), the primordial gonad began to protrude into peritoneal cavity and developed between mesonephric duct and gut. Initial ovarian differentiation was identified by the presence of ovarian cavity and oogonia in the gonads at 55 DAH (TL: 21.1±1.3 mm). Testicular differentiation started at 65 DAH (TL: 23.7±0.9 mm) with appearance of spermatogonial cells in the gonads. These findings indicate that sex differentiation in T. trigonocephalus occurs earlier in females than males, suggesting that this species can be classified as an undifferentiated gonochorist.

부화 후부터 평균전장 0.64 cm를 나타내는 부화 후 150일까지의 버들치, Rhynchocypris oxycephalus를 대상으로 초기생식소 발달과 성분화를 조사하였다. 시언생식세포는 평균전장 0.64cm 자어에서 뚜렷이 나타나\ulcorner. 평균전장 1.91 cm자어에서 시원생식세포는 복강으로돌출되었으며, 평균전장 2.29 cm 자어에서 시원생식세포는 감수분열 난모세포로 전환되었고, 난소로의 분화가 최초 확인되엇따. 평균전장 5.96 cm 자