The Israeli Journal of Aquaculture - Bamidgeh 52(2), 2000, 61-69

EFFECTS OF SALINITY ON EGG AND EARLY LARVAL
CHARACTERISTICS OF THE BLACK PORGY
ACANTHOPAGRUS SCHLEGELI


Wen-Bin Huang ¹,² ,Tai-Sheng Chiu ² and Chang-Tai Shih ³

1 Fisheries Administration, Council of Agriculture, Executive Yuen, Taiwan 100, R.O.C.
2 Institute of Zoology, National Taiwan University, Taipei, Taiwan 106, R.O.C.
3 Taiwan Fisheries Research Institute, Council of Agriculture, Executive Yuen, Taiwan 202, R.O.C.


(Received 7.5.98, Accepted 20.8.00)

Abstract
We examined age, body length, yolk volume and oil globule volume at hatch, and post-hatch life span of the black porgy, Acanthopagrus schlegeli, subjected to salinities of 28, 31, 34 and 37 ppt. The hatching rate was 85% at 34 and 37 ppt and 60% at 31 ppt, but no eggs hatched at 28 ppt. Time to hatch increased with salinity from 31 to 37 ppt, but body length, yolk volume and oil globule volume at hatch and post-hatching life span decreased. During the yolk-sac stage, there were significant salinity effects on body length and oil globule volume, but not on yolk volume. The findings that high salinity favors hatching rate while low salinity favors growth and endurance to starvation may be applicable in aquaculture of the black porgy during its early life.
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