Exposure of Macrobrachium rosenbergii (De Man, 1879) post-larvae to different nitrate concentrations: Effect on performance and welfare

Effects of organic carbon sources on water quality, microbial flocs protein and performance of Macrobrachium rosenbergii post‐larvae reared in biofloc and synbiotic systems

“…This trend was also observed in this study, seen that the treatment RB presented TAN concentrations that were higher as than to other treatments that used molasses as organic carbon source (M and Mf). The behaviour of N‐NO 3 levels in treatments with intensive system followed the same trend observed by Luo et al (2019), accumulating throughout the experimental period, without reaching values considered harmful (8.6 mg L −1 ) for the animals (Dutra et al, 2019).…”

“…The behaviour of N-NO 3 levels in treatments with intensive system followed the same trend observed by Luo et al (2019), accumulating throughout the experimental period, without reaching values considered harmful (8.6 mg L −1 ) for the animals (Dutra et al, 2019).…”

“…Means ranged between 76.75% and 96.5%, which were similar to the studies of Marques et al (2000), Crab et al (2010) and Ballester et al (2017), using the same species in the same developmental stage. Therefore, the satisfactory results for this variable might be related to an efficient feeding strategy and maintenance of water quality parameters in adequate levels (Dauda, 2019;Dong et al, 2020;Dutra et al, 2019;New et al, 2010). Concomitant to this, and given the aggressive and territorial aspects of M. rosenbergii (New et al, 2010), the stocking densities and the use of artificial substrates (Ct) are variables that may also have influenced the animals' survival, seen that rearing M. rosenbergii at high densities tend to result in lower survival (Coyle et al, 2010;Mamun et al, 2010;Marques et al, 2000;Negrini et al, 2017).…”

“…Means ranged between 76.75% and 96.5%, which were similar to the studies of Marques et al (2000), Crab et al (2010) and Ballester et al (2017), using the same species in the same developmental stage. Therefore, the satisfactory results for this variable might be related to an efficient feeding strategy and maintenance of water quality parameters in adequate levels (Dauda, 2019; Dong et al, 2020; Dutra et al, 2019; New et al, 2010). Concomitant to this, and given the aggressive and territorial aspects of M .…”