Publication Date:
2021-05-19
Description:
Esfahan province is located in center of Iran at 51°
31 ' E and 33°
29 ' N with area near 15745 Km^2
that consists
of 9 percent of the country. According to cilianinof scale it enjoys an arid climate. The mean annual precipitation
is equal to 135 mm. Average annual temperature is 16.8 °C and mean annual evaporation is 2435 mm in
Gavkhoni catchment's area. It has several drainages channels such as north and south rodashtain, segzi drainage,
main drainage of water supply organization channel, fender drainage, main drainage, Marchi class II drainage
and other drainage channels. Their waterdebi volume is equal to 900l/s. Also, their water can not use for
agriculture, drinking and industrial purposes due to high salinity. This study was concluded to optimal use of
these water resources aiming at possibilities of culture and propagation of Artemia from Urmia Lake. In this
study, physicochemical factors analysis of water, the climate profile, and fauna and flora of the region were
identified and determined. In rodashtain region drainages, 2 sites in varzaneh and Sian drainages from gavkhoni
wetland limitation were chosen and studied. Water samples in 50-100 liter volumes were taken from their run off
waters with 3 replicates. Artemia cysts were hatched under standard laboratory condition according to Lavens
and Sorgeloos, 1996). Cyst hatching was carried out in 1.5 liter conical zooks. 2 g of Artemia cyst per one liter of
drainage water was added to each treatment together with one evidence. Hatching percentage and hatching
efficiency were determined. Hatching percentage and hatching efficiency after 76 hours were equal to 55 ± 10
percent and 92000 ± 1200 Nauplii /g cyst in the evidence with tap water and 27±5 % and 31000±1000 in
varzaneh drainage water and 13±5 % and 11000±1000 in Sian drainage waters, respectively. Then , all hatched
nauplii were cultured in 3 aquarium containing each 100 liters together with one evidence with 3 replicates
containing 50 liters in each aquarium in laboratory . Nauplii were fed using a suspension with rice bran,
Dunaliella and Naunochlorepsis with density of 2 ×10^ 6 cell/ml. The growth of Artemia Nauplii was slow at the
first week of culture and then continued with suitable norm and lower mortality until maturation. The mean size
of Nauplii length reached to 9 mm after 2 weeks. Their fecundity was 50 cyst per female. The drainage waters of
studied sites can be used as a suitable water source at semi- industrial Artemia production pilot in the region.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Artemia urmiana
;
Drainage
;
Artemia culture
;
Propagation
;
Laboratory
;
Culture
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
117pp.
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