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Effects of dietary phosphorus level and inorganic source on survival and growth of Penaeus vannamei postlarvae in zero-water exchange culture tanks

Published online by Cambridge University Press:  15 February 1998

Mario Velasco ,
Addison L. Lawrence  and
William H. Neill
Mario Velasco
Affiliation:
Texas Agricultural Experiment Station, Texas A&M University System, Shrimp Mariculture Research, 1300 Port St., Port Aransas, TX 78373, USA
Addison L. Lawrence
Affiliation:
Texas Agricultural Experiment Station, Texas A&M University System, Shrimp Mariculture Research, 1300 Port St., Port Aransas, TX 78373, USA
William H. Neill
Affiliation:
Department of Wildlife and Fisheries Sciences, Texas A&M University College Station, TX 77843, USA
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Abstract

Zero-water exchange culture tanks were stocked with Penaeus vannamei postlarvae to compare the effects of (i) three dietary phosphorus levels: 0.4, 0.8 and 1.2 %, and (ii) three dietary inorganic phosphorus sources: CaHPO4, Na2HPO4 and NaH2PO4, on postlarvae biological performance, and total reactive phosphorus accumulation in the water (TRPAW). Dietary Ca:P ratio was maintained within a 1:1 to 1:2 ratio. Postlarvae survival was high and not significantly different among treatments. Postlarvae growth was not significantly different, regardless of dietary phosphorus level. TRPAW was significantly higher with increasing level of dietary phosphorus. Dietary inorganic phosphorus source did not have a significant effect on postlarvae growth. No significant differences were found on TRPAW between diets with Na2HPO4 and NaH2PO4 supplementation at equal dietary phosphorus level. TRPAW was significantly lower with CaHPO4 than with Na2HPO4 or NaH2PO4 supplementation at equal dietary phosphorus level. Environmental quality of culture water may be greatly modified through nutritional strategies without negatively affecting shrimp biological performance.

Keywords

postlarvaephosphoruswater quality bioassaynutritional requirementsshrimp culturePenaeus vannamei
Type
Research Article
Information
Aquatic Living Resources , Volume 11 , Issue 1 , February 1998 , pp. 29 - 33
Copyright
© Elsevier, IRD, Inra, Ifremer, Cemagref, CNRS, 1998

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