Open AccessEffects of ammonia and nitrite on food consumption of the Amazon River prawn Macrobrachium amazonicum (Heller, 1862) postlarvae
Author(s) -
Bruno Ribeiro de Campos,
Rafael Ortiz Kracizy,
Plínio Schmidt Furtado,
Izabel Volkweis Zadinelo,
Eduardo Luís Cupertino Ballester
Publication year - 2021
Publication title -
latin american journal of aquatic research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.357
H-Index - 28
ISSN - 0718-560X
DOI - 10.3856/vol49-issue4-fulltext-2583
Subject(s) - nitrite , prawn , ammonia , zoology , shrimp , fishery , macrobrachium , food science , biology , chemistry , toxicology , decapoda , nitrate , crustacean , ecology , biochemistry
Experiments were carried out to study the effects of ammonia and nitrite on food consumption of Macrobrachium amazonicum postlarvae. Postlarvae (average weight of 0.0625 g) were exposed during 21 days to four concentrations of total ammonia (0, 1.05, 2.1 and 4.2 mg. NH3+NH4+ L-1) and four concentrations of nitrite (0, 0.075, 0.15 and 0.30 mg N-NO2- L-1). After the exposure period, six prawns per treatment were maintained individually in 250 mL experimental units to analyze the food consumption as a function of the amount of food offered and the leftovers during a 24 h period. The food consumption presented significant alterations for prawns exposed to all nitrite concentrations and at concentrations of twice the recommended safety level for total ammonia. According to the results obtained, high concentrations of total ammonia and nitrite affect the food consumption of M. amazonicum adversely, influencing the species performance in culture systems.