Effect of different salinity concentrations on hatching rate and larval development of Patin buah, Pangasius nasutus (Bleeker, 1863)

ABSTRACT

The effects of water salinity on hatching rate and larval performance of Patin Buah (Pangasius nasutus) were studied. The fertilized eggs were incubated at 27.5–28°C in different concentrations of salinity (0, 1, 2, and 3 ppt) until hatch. The hatching rate of 0 ppt (48.6 ± 3.7%), 1 ppt (52.5 ± 3.7%), and 2 ppt (39.7 ± 6.4%) were significantly higher (P < 0.05) than in 3 ppt (14.8 ± 2.0%). The percentages of larval survival at day 30 were 65 ± 1.5%, 72 ± 5.0%, 57 ± 15.0%, and 32 ± 3.1% in 0 ppt, 1 ppt, 2 ppt, and 3 ppt respectively. Survival rates were significantly higher (P < 0.05) in 0 ppt and 1 ppt compared to 2 ppt and 3 ppt. This study reveals that salinity did not significantly improve hatching and the survival rate of P. nasutus, but 1 ppt could be used for the hatching process and larval nursing.

KEYWORDS:

• Exogenous hormone treatment
• induced spawning
• egg incubation
• sodium chloride

Acknowledgments

The authors would like to thank all of the staff members of the Fisheries Research Institute for their assistance in the experiment process.

Disclosure statement

The authors declare no conflict of interest.

Additional information

Funding

This study was funded by research project No. 225010370001 under the Department of Fisheries, Malaysia.