Effect of nitrite on larval development of giant river prawn Macrobrachium rosenbergii

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorMallasen, Margarete
dc.creatorValenti, Wagner Cotroni
dc.date2014-05-20T13:13:02Z
dc.date2016-10-25T16:33:40Z
dc.date2014-05-20T13:13:02Z
dc.date2016-10-25T16:33:40Z
dc.date2006-12-11
dc.date.accessioned2017-04-05T19:19:58Z
dc.date.available2017-04-05T19:19:58Z
dc.identifierAquaculture. Amsterdam: Elsevier B.V., v. 261, n. 4, p. 1292-1298, 2006.
dc.identifier0044-8486
dc.identifierhttp://hdl.handle.net/11449/944
dc.identifierhttp://acervodigital.unesp.br/handle/11449/944
dc.identifier10.1016/j.aquaculture.2006.07.048
dc.identifierWOS:000243289400022
dc.identifierhttp://dx.doi.org/10.1016/j.aquaculture.2006.07.048
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/851045
dc.descriptionThe effects of ambient nitrite concentrations on larval development of giant river prawn Macrobrachium rosenbergii were evaluated. The trials were conducted in two phases: phase 1, larvae from stages I through VIII and phase 2, larvae from stage VIII until post-larvae. In both phases larvae were kept in water with nitrite (NO2-N) concentrations of 0, 2, 4, 8 and 16 mg/L. Oxygen consumption was analyzed for larvae in stage II at nitrite concentrations of 0, 4, and 8 mg/L. Survival, weight gain, larval stage index and metamorphosis rate decreased linearly with increasing ambient nitrite concentration. However, there was no significant difference between larvae subjected to 0 and 2 mg/L NO2-N. In phase 1, there was total mortality at 16 mg/L NO2-N, while in phase 2 larval development stopped at stage X in this treatment. The oxygen consumption in stage II increased significantly at NO2-N concentration from 0 to 4 mg/L, but there was no difference between 4 and 8 mg/L NO2-N. In conclusion, increasing ambient nitrite up to 16 mg/L NO2-N delays larval development, reduces larval growth rate and causes mortality, whereas no significant effect occurs for levels below 2 mg/L NO2-N. However, the establishment of a general safe level of nitrite to M rosenbergii hatchery may be difficult due to the great variability in larvae individual sensitivity. (c) 2006 Elsevier B.V. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationAquaculture
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectfreshwater prawn
dc.subjectlarvae
dc.subjectMacrobrachium
dc.subjectnitrite
dc.titleEffect of nitrite on larval development of giant river prawn Macrobrachium rosenbergii
dc.typeOtro


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