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Effects of salinity, aeration and light intensity on oil globule absorption, feeding incidence, growth and survival of early-stage grouper Epinephelus coioides larvae

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Date
2002
Author
Toledo, Joebert D.
Caberoy, Nora B.
Quinitio, Gerald F.
Choresca, Casiano H.
Nakagawa, Heisuke
Page views
2,970
Subject
aeration ASFA
larvae ASFA
light intensity ASFA
percoid fisheries ASFA
salinity ASFA
light ASFA
Epinephelus coioides AGROVOC
Feeding incidence
First-feeding
Grouper larvae
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Abstract
A series of experiments were conducted to examine the effects of salinity, aeration and light intensity on oil globule absorption, feeding incidence, and growth and survival of early-stage Epinephelus coioides larvae. Newly hatched larvae were transferred to 40-L aquaria at a density of 1500 individuals/aquarium. Larvae were exposed to different levels of aeration (0 mL/min per L, 0.62 mL/min per L, 1.25 mL/min per L, 2.50 mL/min per L, or 3.75 mL/min per L); salinity (8 ppt, 16 ppt, 24 ppt, 32 ppt, or 40 ppt); and light intensity (0 lx, 120 lx, 230 lx, 500 lx, or 700 lx) for 4–6 days. Twenty larvae were sampled daily at 11:00 hours to measure for total length (TL), oil globule volume, and feeding incidence. Survival rates were determined by counting the total number of larvae remaining in each aquarium at the end of the experiment. Significantly higher survival rates (P < 0.05) were observed at aeration levels of 0.62 mL/min per L and 1.25 mL/min per L, at salinity levels of 16 ppt and 24 ppt, and at light intensities of 500 lx and 700 lx. The influence of aeration level, salinity and light intensity on oil globule absorption, feeding incidence, and growth and survival of early-stage grouper larvae are discussed.
URI
http://hdl.handle.net/10862/1949
Suggested Citation
Toledo, J. D., Caberoy, N. B., Quinitio, G. F., Choresca, C. H., & Nakagawa, H. (2002). Effects of salinity, aeration and light intensity on oil globule absorption, feeding incidence, growth and survival of early-stage grouper Epinephelus coioides larvae. Fisheries Science, 68(3), 478-483. https://doi.org/10.1046/j.1444-2906.2002.00451.x 
DOI
10.1046/j.1444-2906.2002.00451.x
Type
Article
ISSN
0919-9268; 1444-2906
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  • Journal Articles [1156]

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