Effect of salinity and feeding frequency on the intestinal epithelium and biomass of severum (Heros severus) post-larvae (Heckel, 1840), an Amazonian cichlid with potential for ornamental aquaculture
Year: 2024
Type: article
Abstract: The present study aimed to evaluate the final biomass and average diameter of enterocytes nucleus in the intestinal epithelium of severum post-larvae (Heros severus) fed with Artemia sp. nauplii and given to four different salinities and two feeding frequencies, during a 15-day period. The experiment was performed at the Federal University of Pará in a completely randomized design, in a factorial system, with four different sodium chloride concentrations in the culture water (0, 2, 4, and 6 g/L), and daily feeding with 1,000 Artemia sp. nauplii per post-larvae, divided into two (8:00 am and 5:00 pm) and four (8:00 am, 11:00 am, 2:00 pm and 5:00 pm) times a day, with four replications per treatment. The final biomass was higher in post-larvae kept in salinity from 0 to 4 g/L and lower at a concentration of 6 g/L. Enterocyte nucleus were larger in animals subjected to 2 and 4 g/L treatments, and smaller in 0 and 6 g/L treatments. Feeding frequency did not significantly influence the evaluated animals' final biomass and enterocyte nucleus diameter. The result of the present study indicates that severum post-larvae can be cultured with up to 4/g L of sodium chloride in the water without affecting its final biomass. It is recommended that severum post-larvae be fed twice a day.
Institution: Universidade Federal do Pará
Language: English
Subfield: Aquatic Science
Domain: Life Sciences
SDGs: Zero hunger, Life below water
Open Access status: diamond
OpenAlex ID: W4405892233