Artemia franciscana, Kellogg, 1906, Kellogg, 1906

Sulistiyarto, Bambang & Bakrie, Restu, 2024, Survival, growth, and biomass of brine shrimp (Artemia franciscana) fed with spirulina powder and soybean flour, International Journal of Fisheries and Aquatic Studies 12 (1), pp. 13-18 : 14-16

Results

The number of Artemia nauplii stocked in the experimental aquarium was 2000 nauplii/L. During the maintenance period (21 days), the density of Artemia decreased due to some dying. The average number of live Artemia after 21 days of rearing were 501.33±28.56 individuals (S-100%), 381.89±37.26 individuals (SB-100%), and 389.78±40.51 individuals (S-50%+SB-50%). The survival rates of Artemia fed with S-100%, SB-100%, and S-50% + SB-50%, were 25.07±1.43%, 19.09±1.36%, and 19.49±2.03% respectively ( Fig.1 ).

The results of analysis of variance (ANOVA) showed that the survival rate of Artemia was very significantly affected by different feeding (p <0.01). The LSD test showed that the highest survival rate was obtained by feeding with S-100%, while fed with SB-100% and S-50% + SB-50% were not significantly different (p <0.05).

The 1-day-old Artemia nauplii that were stocked had a body length of 0.94± 0.08 mm. Artemia grew and reached a body length of 5.05 – 11.40 mm in 21 days of rearing, depending on the feed treatment given. The body length of Artemia fed with S-100%, SB-100%, and S-50% + SB-50%, were 9.00± 0.15 mm, 7.24± 0.44 mm, and 8.89± 0.44 mm respectively ( Fig. 2 ). The results of analysis of variance (ANOVA) showed that the Artemia body length was very significantly affected by different feeding (p <0.01). The LSD test showed that fed with SB-100% resulted in a lower Artemia body length compared to S-100% and S-50%+SB-50%, while S-100% were not significantly different with S-50%+SB-50% (p <0.05).

After 21 days of rearing, Artemia in each aquarium were harvested and the yields were weighed by wet weight as Artemia biomass . The Artemia biomass production from each treatment are presented in Figure 3 . The one way ANOVA analysis showed that the Artemia biomass was very significantly affected by different feeding (p <0.01). Based on the LSD test results, the highest Artemia biomass was produced by feeding S-100% (17,667±0.322 gm), followed by feeding S-50%+SB-50% (13,622±2,183 gm), and the lowest by feeding SB -100% (10.858± 1.428 grams) (p <0.05).

Water quality conditions of the Artemia rearing media during 21 days of rearing are presented in Table 1 . The salinity of Artemia rearing media ranged from 34.80 - 36.90 ppt. The evaporation process caused salinity of media to increase over time. Therefore, the volume of aquarium water was always controlled. If it decreased due to evaporation, fresh water was added, so that salinity could be maintained. The oxygen content of the rearing media was supported by continuous aeration which produced dissolved oxygen ranging from 4.70 - 6.80 mg L- 1. The pH level of the rearing media was recorded in the range 7.02 - 7.42. The water temperature was quite stable, recorded in the range of 27.00 - 28.80 °C. The results of variance analysis (ANOVA) showed that all parameters were no significant differences among the treatments (p>0.05).

Figures

Fig 1: The survival rate of Artemia fed with different feeds at 21 days of rearing

Fig 2: The body length of Artemia fed with different feeds at 21 days of rearing

Fig 3: The biomass of Artemia fed with different feeds at 21 days of rearing