Publication Date:
2021-05-19
Description:
Acipenser persicus is the most important sturgeon species in the south Caspian Sea, showing high
mortality during larval culture. The aim of this study was to use the freshwater rotifer,
Brachionus calyciflorus to feed A. persicus larvae to improve survival rates and enhance
resistance. Three experimental treatments were used in this study; Treatment 1, similar to the
feeding protocol of the hatchery was initially fed decapsulated cysts of artemia and then fed
daphnia; Treatment 2, was fed a mixed diet of decapsulated artemia cysts, daphnia and freshwater
rotifers and Treatment 3, was fed freshwater rotifers enriched with vitamin C (ascorbic acid 6-
palmitate). A total of 45 larvae were stocked in each experimental tank (100 l capacity) filled
with 30 l of water. Three replicates were used for each experimental group. Larvae were fed at the
rate of 30% of body weight per day for 8 days. Mean dissolved oxygen, pH and water
temperature throughout the experimental period were 9.58±0.2 mg/l, 8.5±0.1 and 22.5±0.5 ºC,
respectively. Results showed significant differences in specific growth rate (SGR), percentage
weight gain (WG), feed conversion ratio (FCR), and condition factor (CF) of experiment
treatment 1 and treatment 3 and survival ratio were significantly different among treatment 3 and
other treatments .This study demonstrated that Brachionus calyciflorus is a suitable live food for
larval feeding.
Description:
Published
Keywords:
Acipenser persicus
;
Persian sturgeon
;
Brachionus calyciflorus
;
Enrichement
;
Vitamin C
;
Freshwater
;
Growth
;
Larvae
;
Fed
Repository Name:
AquaDocs
Type:
Journal Contribution
,
Refereed
Format:
pp.139-144
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