STUDY ON THE INFLUENCE OF ENVIRONMENTAL FACTORS AND DENSITY ON THE NURSERY PROCESS OF LEVEL II JUVENILE EEL (ANGUILLA MARMORATA QUOY AND GAIMARD, 1824)

Abstract

Environmental factors and stocking density affected nursing level II juvenil eel (Anguilla marmorata quoy & Gaimard, 1824) with weight was from 6-7g/ind by synthetic fine powder food. With density was 1.000 inds/m³; 1.500 inds/m³; 1.800 inds/m³ and 2.000 inds/m³ in oxygen aeration composite tanks. Results after 5 months of farming, the appropriate temperature for eels developed from 28,38-28,86⁰C, pH from 7,24-7,44; NO₂: 6,26-6,55mg/l, DO: 6,83-7,44mg/l. The length of juvenile eel between treaments was from 25,23 ± 0,06cm to 27,22 ± 0,02cm. The average weight in the treatment 1.000 inds/m³ was (56,07g/ind), the treaments 1.500 inds/m³; 1.800 inds/m³ and 2.000 inds/m³ with average weight were (55,13; 53,05 and 51,05g/ind). The PCR food conversion coefficient of eels in 4 treatments was 2,3-2,5 and the survival rate reached 82%.