Search published articles
Showing 2 results for Artemia Franciscana
, , ,
Volume 5, Issue 3 (12-2016)
Abstract
In a randomly and factorially designed experiment, the interaction effects of dietary zeolite (0 and 2%) and three salinity levels (80, 130 and 180 ppt) on growth, survival, reproductive performance and total longevity of A. franciscana were determined (6 treatments in total). The experiment was carried in two stages: nauplius to maturity and maturity to death of all females. The results indicated that the total body length of Artemia fed with zeolite were not significantly different among treatments in the third week of rearing (P>0.05), except for nauplii fed zeolite in salinity 180 ppt. However, Artemia fed with zeolite in 80 ppt had a higher body length and furcal length compared with other treatments. Nauplii in all treatments reached sexual maturity within 17-23 days (P>0.05). Survival rate was far higher in groups fed with zeolite compared to unfed groups; the highest values were recorded in group fed with zeolite at the salinity 130 ppt (P<0.05). The reproductive period and total longevity of females decreased with increasing salinity, but this trend was not affected by diet type. Average offspring production in the groups fed with zeolite was in the range of 861-1160 offspring compared to unfed groups (604-741 offspring) (P<0.05). The encysted embryos percentage was different in the range of 20-35%. According to the results, the inclusion of 2% zeolite in salinity within 80-130 ppt were better for growth of the Artemia to maturity. Also, it is recommended to add zeolite in the Artemia diet with the increasing trend in salinity from 80 to 180 ppt for improving broodstock reproductive performance.
V. Rezaei Aminlooi, N. Ahmadifard , A. Tukmechi, N. Agh,
Volume 7, Issue 3 (9-2018)
Abstract
Aims: Artemia is one of the most important live foods in aquaculture. The aim of the current study was to investigate Microbiota of Artemia franciscana fed by bacterial probiotic Bacillus subtilis and yeast Saccharomyces cerevisiae under laboratory conditions.
Materials and Methods: In this experimental research, 500 Artemia nauplius were transported to 1 liter Zug with salinity of 70ppt and fed daily by Dunaliella tertiolecta and wheat bran. The present study was carried out in 4 treatments, including control treatment (no additive probiotics), probiotic treatment of Saccharomyces cerevisiae, probiotic treatment of Bacillus subtilis, and equal combination of yeast and bacteria. Statistical tests including Duncan's new multiple range test and one-way analysis of variance were used. SPSS 21 and Excel 2013 software were also used.
Findings: Bacterial probiotic treatment showed the highest colony count compared with other treatments (p<0.05). Treatment containing equal combination of yeast and bacteria had the highest colony after probiotic bacterial treatment (p<0.05). The highest number of Bacillus colonies in the body was obtained in probiotic bacterial treatment and combination of yeast and bacteria, respectively, which was significantly higher than control and yeast treatments (p<0.05). Based on the total number of Bacillus colonies, probiotic bacterial treatment showed a significant difference with other treatments and the lowest number of colony was related to probiotic yeast treatment (p<0.05).
Conclusion: Compared with other treatments, the highest number of lactic acidic bacteria is in bacterial treatment. These probiotics can well place on the surface as well as inside the body of Artemia. Therefore, using Bacillus subtilis alone or with Saccharomyces cerevisiae can have a positive effect on the bacterial count of Artemia
