Two experimental assays to produce biomass of Artemia franciscana (Anostraca)
Por:
Espinosa-Fuentes M., Ortega-Salas A.A., Laguarda-Figueras A.
Publicada:
1 ene 1997
Resumen:
Two experimental assays were done to calculate the biomass of Artemia franciscana produced in 15 and 13 days, respectively. Experimental assay 1) three sets of three aquaria had 20 l of brackish water (20 ‰) and 6 nauplius/ml each. One had dry Spirulina as food source, the other two sets had fertilizers: chicken manure and "fosforin", and live Tetraselmis as food source. The pH varied: 7.3-8.0, temperature (T°C) varied: 25.5 - 33.0, and oxygen (O2 mg/l) varied: 4.5 - 6.0 . The obtained furcal length was from 6.0 mm to 9.5 mm. The mortality rate was between 95.7% and 98.9%. Biomass was between 13.0 g and 36.2 g in 20 l. Experimental assay 2) three sets of three concrete tanks had 120 l of brackish water (20 ‰) and 1 nauplius/ml each. They had the same food source as essay (1), except that Tetraselmis was no used. The pH was: 7.5 - 9.0, T°C: 25.5 - 35.0, and O2 mg/l: 0.5 - 3.4. Furcal length was 8.7 mm to 10.1 mm. The mortality rate was 89.7% - 96.5%. Biomass was 41.9 g - 86.5 g in 120 l. Values higher than 0.624 mg/l of ammonia were lethal. Spirulina, as a food item, gave the best results.
Filiaciones:
Espinosa-Fuentes M.:
Inst. de Cie. del Mar v Limnologia, UNAM, Ap. Post. 70-305, México 04510, D.F., Mexico
Ortega-Salas A.A.:
Inst. de Cie. del Mar v Limnologia, UNAM, Ap. Post. 70-305, México 04510, D.F., Mexico
Laguarda-Figueras A.:
Inst. de Cie. del Mar v Limnologia, UNAM, Ap. Post. 70-305, México 04510, D.F., Mexico
|