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Aquaculture International

, Volume 23, Issue 2, pp 671–682 | Cite as

Juvenile hybrid grouper (Epinephelus coioides × E. lanceolatus) are euryhaline and can grow in a wide range of salinities

  • Parinya Sutthinon
  • Karun ThongprajukaewEmail author
  • Suktianchai Saekhow
  • Rinpawee Ketmanee
Article

Abstract

This study was carried out to find the optimal salinity for growth of juvenile hybrid grouper (Epinephelus coioides × E. lanceolatus). Hybrid groupers (23.5 ± 1.1 g initial weight and 11.37 ± 0.18 cm initial length) were reared at four salinities (10, 15, 20 and 30 ppt) (in triplicates with 15 fish per replication) for 3 months. Feed intake, growth, feed conversion, visceral organ indices, chemical composition and digestive enzyme activities were examined and used as assessment criteria. Growth, feed conversion and visceral organ indices were similar across the four treatments, and there were only minor differences in the proximal compositions (moisture, protein, lipid and ash) of muscle and carcass. The specific activities of trypsin, amylase and the ratio of amylase to trypsin activities suggested a possible adaptation of digestion of protein and carbohydrate in relation to salinity. The findings indicate that the hybrid grouper is euryhaline and is capable of growth over a wide salinity range (10–30 ppt). This may facilitate culture of the fish in both brackish water and seawater.

Keywords

Carcass Digestive enzymes Feed utilization Growth Muscle 

Notes

Acknowledgments

This work was financially supported in part by the Department of Applied Science, Faculty of Science, Prince of Songkla University; and Rayong Coastal Fisheries Research and Development Center, Coastal Fisheries Research and Development Bureau, Department of Fisheries. The authors would like to thank research assistance (Ms. Amporn Sarapirom, Ms. Tanikan Buachan, Ms. Piyarom Poungchor and Ms. Pinchakorn Sritongkum); and the Publication Clinic, Research and Development Office, Prince of Songkla University, for help in manuscript preparation.

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Parinya Sutthinon
    • 1
  • Karun Thongprajukaew
    • 2
    Email author
  • Suktianchai Saekhow
    • 2
  • Rinpawee Ketmanee
    • 3
  1. 1.Rayong Coastal Fisheries Research and Development Center, Coastal Fisheries Research and Development Bureau, Department of FisheriesMinistry of Agriculture and CooperativesBangkokThailand
  2. 2.Department of Applied Science, Faculty of SciencePrince of Songkla UniversitySongkhlaThailand
  3. 3.Chumpon Coastal Fisheries Research and Development Center, Coastal Fisheries Research and Development Bureau, Department of FisheriesMinistry of Agriculture and CooperativesBangkokThailand

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