Mass production of rotifer using selfproduced concentrated nannochloropsis sp.

Mok , Wen Jye (2007) Mass production of rotifer using selfproduced concentrated nannochloropsis sp. Masters thesis, Universiti Malaysia Sabah.

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Abstract

Rotifer is the most important live feed in aquaculture, but attempts to produce sufficient quantities continuously with low cost have been unsuccessful. In this study, rotifer culture was tested to be improved by using self-produced concentrated Nannochloropsis sp. (SC-Nanno). SC-Nanno was prepared by concentrating Nannochloropsis sp. cells from an outdoor culture of Nannochloropsis sp. grown in a 20-tonne tank using a water purifier filter Sterapore-PKO. The estimated cost of SC-Nanno was RM 4.S1/L. The optimum salinity for rotifer culture was 10 ppt. The effectiveness of using SC-Nanno for rotifer culture was tested by comparing the rotifer production fed with different feed, which were SC-Nanno, commercial concentrated Nannochloropsis sp. (CC-Nanno) and baker's yeast. Both frozen SC-Nanno and CC-Nanno were thawed while baker's yeast was mixed with seawater before feeding to the rotifer. The mean rotifer individual density fed with SC-Nanno was higher (578±14 individuals/mL) than those fed with CC-Nanno (S20±124 individuals/mL) and baker's yeast (243±21 individuals/mL). Rotifer culture fed with SC-Nanno in different storage conditions namely fresh, chilled and frozen was also studied. The mean rotifer individual density fed with fresh SC-Nanna was higher (796±9 individuals/mL) than those fed with chilled SC-Nanna (663±7 individuals/mL) and frozen SC-Nanno (578±14 individuals/mL). From the results, mass production of rotifer is feasible since SC-Nanno can be produced in hatcheries instead of relying on expensive imported concentrated Nannochloropsis sp. Moreover, SC-Nanna can be stored in either chilled or frozen condition.

Item Type:Thesis (Masters)
Uncontrolled Keywords:rotifer culture, aquaculture, SC-Nanno, self-produced
Subjects:Q Science > QL Zoology
Divisions:SCHOOL > Borneo Marine Research Institute
ID Code:6796
Deposited By:IR Admin
Deposited On:21 Aug 2013 15:11
Last Modified:21 Aug 2013 15:11

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