Culture and nutritional enrichment of the rotifer brachionus rotundiformis (Tschugunoff) for the rearing of marine Fin fish and shrimp larvae (TH 127)

Gopakumar, S D (2004) Culture and nutritional enrichment of the rotifer brachionus rotundiformis (Tschugunoff) for the rearing of marine Fin fish and shrimp larvae (TH 127). ["eprint_fieldopt_thesis_type_phd" not defined] thesis, Cochin University of Science and Technology, Cochin.

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Abstract

The present study evaluated the relative efficacy of selected micro algae and yeast for the mass culture of B rotundiforrnis and also to optimize the environmental factors like pH, salinity, and photoperiod. Fatty acid profiles of enriched rotifers were analysed and the enriched rotifers were used for the production of A sebae and P monodon juveniles by replacing Artemia nauplii. The efficacy of micro algae like Nannochloropsis salina, Chlorella marina, Isochrysis galbana and Baker's yeast were evaluated at different concentrations as feed for mass production of rotifers. Experimental duration was six days for each experiment and at the end of the experiment samples were taken and counted under microscope and the growth rate of rotifers was calculated. The instantaneous growth rate (K), per day growth and doubling time of were also calculated. The results of the experiments show that Nannochloropsis salina and Isochrysis galbana are the best feeds for mass production of B. rotundiforrnis. The instantaneous growth for rotifers fed with N.salina is higher (O.308±O.004) compared with other feeds. The per day growth was highest in rotifers fed I. galbana (40.18±1 .97) and doubling time was reduced to 2.25 days when N. salina was fed to rotifers.

Item Type:	Thesis (["eprint_fieldopt_thesis_type_phd" not defined])
Uncontrolled Keywords:	nutritional enrichment; rotifer; Brachionus rotundiformis Tschugunoff; rearing; marine Fin fish; shrimp larvae
Subjects:	Fish and Fisheries > Fish Nutrition Invertebrates > Rotifer Aquaculture Theses
Divisions:	CMFRI-Kochi > Fishery Environment Management Division Subject Area > CMFRI > CMFRI-Kochi > Fishery Environment Management Division CMFRI-Kochi > Fishery Environment Management Division Subject Area > CMFRI-Kochi > Fishery Environment Management Division
Depositing User:	Dr. V Mohan
Date Deposited:	31 Jan 2011 10:44
Last Modified:	01 Mar 2023 08:48
URI:	http://eprints.cmfri.org.in/id/eprint/7223

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