The effect of salinity on growth rate, survival and swimbladder inflation in gilthead seabream, Sparus aurata, larvae

Amos Tandler, Fabio A. Anav, Itzhak Choshniak

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

The effects of salinity (15-40 p.p.t. salinity; 450-1200 mOsm kg-1) on growth, survival and swim bladder (SB) inflation in gilthead seabream, Sparus aurata, were evaluated. Over the salinity range tested, 1-32 day old seabream larvae were found to be osmotic regulators. Within the range tested, 1 day old larvae maintained an osmotic pressure of 224 mOsm kg-1, significantly lower than 410 mOsm kg-1 in 13 and 24 day old larvae. In addition, water content in larvae was negatively correlated with age, being over 86% in 4 day old larvae and 83% in 32 day old larvae. A negative relationship was found between salinity and survival; as the rearing salinity decreased from 40 to 25 p.p.t., survival increased from 5.3 to 18.6%. Larval final dry weight (DW) and wet weight (WW) were over 16% higher at 25 than 40 p.p.t. salinity. Finally, reduced salinity induced a significant increase in the rate of SB inflation; 65 to 92.5% in 40 and 25 p.p.t. acclimated larvae, respectively.

Original languageEnglish
Pages (from-to)343-353
Number of pages11
JournalAquaculture
Volume135
Issue number4
DOIs
StatePublished - 15 Oct 1995
Externally publishedYes

Keywords

  • Salinity
  • Sparus aurata
  • Swim bladder

ASJC Scopus subject areas

  • Aquatic Science

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