<b>The effect of abiotic factors on the larviculture of pintado amarelo <em>Pimelodus maculatus</em> (Lacépède 1803): salinity an tank color</b> - DOI: 10.4025/actascianimsci.v26i2.1859

Abstract

Abiotic factors determine the success of the larviculture in some fish species. Tank color and the water salinity can cause alterations in the behavior and physiology of the fish post-larvae. The purpose of this experiment was to evaluate the influence of the difference water salinity concentration (0.0‰; 0.7‰; 1.4‰; 2.0‰; 2.5‰ and 5.0‰) and the use of white or black tanks in the larviculture of Pimelodus maculatus. The survival rate was affected by water salinity (p<0.05), with the highest rate 45.6±3.9%, obtained at a salinity of 2.0‰ and a total mortality at salinity 5.0‰. There was no difference in the survival rate (p>0.05) between post-larvae stocked in black or white tanks with an average value of 31.7±17.7%. Therefore, 2.0‰ proved to be the best salinity for larviculture of the Pimelodus maculatus, and the colors tested did not affect the survival of the post-larvae.