Diverse Adaptability in Oryzias Species to High Environmental Salinity

• DOI: 10.2108/zsj.19.727
• Publication Date: 2004-10-08T08:16:08Z
• Authors: Koji Inoue; Yoshio Takei
• Keywords: Adaptability; Oryzias

The genus Oryzias containing freshwater (FW) and seawater (SW) species is a potential model for studying mechanisms of osmotic adaptation. In this study, we compared SW adaptability four species, O. javanicus, dancena, latipes marmoratus inhabiting different environments. was evaluated at several stages the lifecycle: (i) survival rates adult fish after transfer from FW to 50%SW or SW, (ii) spawning ability in (iii) fertilization (iv) hatching FW, SW. Results obtained agreed with natural habitat each species: which inhabits brackish water (BW), fully adaptable both all examined. BW dancena also revealed high except rate. marmoratus, confined exhibited low examined while latipes, another most Based on these results, role distribution area discussed.