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The anadromous Japanese Grenadier Anchovy Coilia nasus is a commercially important fish that is mainly distributed in the Yangtze River and its estuarine area. Two trials were performed to determine the effect of acute salinity stress on the survival of early C. nasus larvae at 0 d posthatch (DPH) and 2 DPH. The salinity treatments for these two trials were 0.4, 5, 10, 15, 20, and 25‰. A third trial compared the growth of juveniles in 3, 6, 9, 12, 15, and 18‰ salinity. Larvae could only tolerate a limited range of salinity ( 12‰) caused low survival, and low salinity (

Acute and chronic experiments were conducted to evaluate the effect of salinity on survival and growth of the juvenile Dark Sleeper Odontobutis potamophila. For the acute experiment, half-lethal concentrations (LC50) of salinity for the juvenile Dark Sleeper after exposures for 12, 24, 48, 72 and 96 h were determined. Mean survival time (MST) and half-survival time (ST50) at salinity of 32‰ were also recorded. For the chronic experiment, a 22-day trial focused on comparing the effects of different salinity levels (0, 2, 4, 6, 8, and 10‰) on survival rate and growth of the juvenile Dark Sleeper. Results revealed that the 96-h LC50 was 13.79‰ salinity. MST and ST50 at 32‰ were 35.4 min and 37.0 min, respectively. In the 22-d trial, survival rate and specific growth rate (SGR) decreased with salinity. Survival rate of groups in 8‰ and 10‰ salinity were significantly lower than that of other groups. The SGR for body length and body weight of the 10‰ group was significantly lower than that of the othe...

To determine the optimal condition of photoperiod for embryo development and larval culture of tawny puffer, Takifugu flavidus, the effects of photoperiod on egg hatching and the growth and survival of larvae from 3 to 23 d after hatching (dah) were assessed. The results show that photoperiodic responses varied with the developmental stage during the early development of tawny puffer. Photoperiod did not significantly affect the hatch rate, viability of 24 h post‐hatch larvae, and total mortality rate of tawny puffer embryos; however, it affected the incubation period, which significantly increased with increasing photoperiod from 6 to 24 h. The shortest incubation period was predicted to occur at 3.56 h day length from the quadratic relationship. However, photoperiod strongly affected the growth and survival of the tawny puffer larvae from 3 to 23 dah. Increasing the day length resulted in improvement of the larval growth and survival within the 0–12 h day length range; however, beyond the 12 h day length, a longer day length was not beneficial, and a 24 h continuous light had a negative effect on growth. From the quadratic relationships, the highest growth and survival rates were predicted to occur at 14.16 h and 17.74 h day length, respectively. Therefore, the optimal photoperiods for tawny puffer embryos and larvae were 3–6 and 12–18 h day length, respectively. The results of this study are useful in increasing the production of the species during incubation and larval culture.