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- Title
Histological alterations in gills of shrimp Litopenaeus vannamei in low-salinity waters under different stocking densities: Potential relationship with nitrogen compounds.
- Authors
Fregoso‐López, Marcela G.; Morales‐Covarrubias, María S.; Franco‐Nava, Miguel A; Ramírez‐Rochín, Javier; Fierro‐Sañudo, Juan F; Ponce‐Palafox, Jesús T; Páez‐Osuna, Federico
- Abstract
Two experimental modules with different stocking densities (M1 = 70 and M2 = 120 shrimp /m2) were examined weekly over a culture cycle in tanks with low-salinity water (1.9 g/L) and zero water exchange. Results showed survival rates of 87.7 and 11.9% in M1 and M2, respectively. Water temperature, pH, dissolved oxygen, electrical conductivity and chlorophyll a were not significantly ( p > .05) different between modules. In contrast, the concentrations of nitrogen compounds were significantly ( p < .05) different between modules, except nitrite-N (M2 were 2.31 ± 1.38 mg/L N- TAN, 0.18 ± 0.49 mg/L N- NO2− and 6.83 ± 6.52 mg/L N- NO3−; in M1: 0.97 ± 0.73 mg/L N- TAN, 0.05 ± 0.21 mg/L N- NO2− and 0.63 ± 0.70 mg/L N- NO3−). When waters of both modules reached higher levels of ammonia and nitrite, histological alterations were observed in gills. The histological alterations index ( HAI) was higher in M2 (5-112) than in M1 (2-22).
- Subjects
WHITELEG shrimp; GILLS; SHRIMP anatomy; SHRIMP populations; SALINITY; EFFECT of salt on fishes; EFFECT of water quality on fishes; ANATOMY; PHYSIOLOGY
- Publication
Aquaculture Research, 2017, Vol 48, Issue 12, p5854
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/are.13408