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Aquaculture International

, Volume 27, Issue 5, pp 1239–1250 | Cite as

Water temperature and salinity synergistically affect embryonic and larval development of the tropical black-lip rock oyster Saccostrea echinata

  • Samantha J. NowlandEmail author
  • Wayne A. O’Connor
  • Shane S. Penny
  • Matthew W. J. Osborne
  • Paul C. Southgate
Article
  • 99 Downloads

Abstract

Poor larval survival is a bottleneck to commercial hatchery production of the tropical black-lip rock oyster, Saccostrea echinata. This study investigated the synergistic effects of water temperature and salinity on embryonic and larval development across each major larval life stage. Results showed that water temperature and salinity have a significant effect on embryonic development of S. echinata and that embryos did not develop below 17 °C and 14 psu. Survival was high (55–100%) across all treatments and larval stages, and shell size was used primarily to determine larval response to treatments. Larval shell size increased as water temperature and salinity increased, reaching optima at 32 °C and 23 psu for D-veligers (mean DVM 78.18± 0.85 μm), at 32 °C and 26 psu for umbonate larvae (mean DVM 183.40± 2.60 μm), and at 32 °C and 29 psu for eyed larvae (mean DVM 249.64± 3.22 μm). It is recommended that S. echinata embryos and larvae are cultured within 28–32 °C and at salinity optima for each larval stage: embryo development at 32 psu, D-veligers and umbonate larvae between 23 and 26 psu, and eyed larvae between 28 and 30 psu. This is the first investigation of the combined effects of water temperature and salinity on S. echinata and provides valuable information to accelerate commercial aquaculture of this tropical species.

Keywords

Larvae Rock oyster Saccostrea echinata Salinity Tropical Water temperature 

Notes

Acknowledgements

This study was conducted within the Northern Territory Governments “Tropical Rock Oyster Aboriginal Economic Development Program”. We thank the Warruwi community of Goulburn Island for supporting this project with the supply of broodstock. We also recognise the significant support provided by the Darwin Aquaculture Centre staff, in particular we thank Cameron Hartley, Paul Armstrong, Shannon Burchert, and Ella-Monique Mason for their contribution during hatchery culture.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed by the authors.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Aquaculture Unit, Department of Primary Industry and ResourcesNorthern Territory GovernmentDarwinAustralia
  2. 2.School of Science and EngineeringUniversity of the Sunshine CoastSippy DownsAustralia
  3. 3.NSW FisheriesPort Stephens Fisheries InstituteTaylors BeachAustralia
  4. 4.Australian Centre for Pacific Islands Research and Faculty of Science, Health, Education and EngineeringUniversity of the Sunshine CoastMaroochydoreAustralia

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