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Growth response of cultured larvae of silver therapon Leiopotherapon plumbeus (Kner, 1864) in outdoor tanks in relation to fertilizer type and fish density

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Date
2016
Author
Aya, Frolan ORCID
Garcia, LM ORCID
Page views
3,613
Subject
growth rate ASFA
fish ASFA
ammonium compounds ASFA
survival ASFA
growth ASFA
fertilization ASFA
density ASFA
larvae ASFA
zooplankton ASFA
phosphates ASFA
fertilizers ASFA
tanks ASFA
organic wastes ASFA
fry ASFA
water quality ASFA
temperature effects ASFA
fish larvae ASFA
mineral nutrients ASFA
stocking density ASFA
agrochemicals AGROVOC
ammonium AGROVOC
Ambient temperature
Nutrient concentrations
Above ground tanks
water tanks AGROVOC
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Abstract
This study evaluated the effects of fertilizer type and fish density on early growth and survival of silver therapon Leiopotherapon plumbeus (Kner, 1864) larvae reared in outdoor tanks. In the first experiment, larvae (1.92 ± 0.09 mm total length) were stocked into nine, 4 m3 tanks at an initial density of 0.5 larvae L-1 and reared for 42 days at an ambient temperature of 28.8–30.7°C. Three treatments with three replicates each were compared: organic (chicken manure, OF) or inorganic fertilizers (ammonium phosphate, IF) applied once every 2 weeks, and the unfertilized (NF) tanks serving as the control group. Water quality, zooplankton densities, survival or growth of L. plumbeus larvae did not vary significantly in either fertilized or unfertilized tanks. Fertilization resulted in elevated nutrient concentrations, which did affect survival (2.10%–6.07%) of the fish larvae. In the second experiment, larvae were stocked at densities of 0.4 or 0.6 larvae L-1 in tanks fertilized at 4–5 days interval with OF and IF for 30 days. Growth performance of L. plumbeus larvae was affected by fish density, with significantly larger (20.04 ± 2.65 mm in total length) and higher specific growth rate (SGR; 6.97 ± 0.48% day-1) at 0.4 larvae L-1 than at 0.6 L-1. Fry production did not vary significantly between fish density treatment groups given the same fertilizer types, but survival rates were improved at 0.4 L-1. Together, production of L. plumbeus larvae in outdoor tanks can be optimized at a lower stocking density, regardless of the type of fertilizer used.
URI
http://hdl.handle.net/10862/3221
Suggested Citation
Aya, F., & Garcia, L. (2016). Growth response of cultured larvae of silver therapon Leiopotherapon plumbeus (Kner, 1864) in outdoor tanks in relation to fertilizer type and fish density. Journal of Applied Ichthyology, 32(6), 1186-1193. https://doi.org/10.1111/jai.13138 
DOI
10.1111/jai.13138
Type
Article
ISSN
0175-8659; 1439-0426
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