Effect of intensification on grow out of the Amazon River prawn, Macrobrachium amazonicum

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dc.contributor.authorMoraes-Valenti, Patricia M. C.
dc.contributor.authorValenti, Wagner Cotroni [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:13:02Z
dc.date.available2014-05-20T13:13:02Z
dc.date.issued2007-12-01
dc.description.abstractThe effects of intensification on growth, survival, productivity, population structure, and distribution of harvested biomass in individual size classes of Macrobrachium amazonicum in semi-intensive culture were evaluated. Postlarvae (0.01 g) were stocked in 12 ponds at densities of 10, 20, 40, and 80/m(2) (three replicates per treatment) and raised for 5.5 mo. Average individual weight significantly decreased and productivity significantly increased as stocking density increased (P < 0.001), while survival was not affected (P > 0.05). Prawn mean weight at harvest ranged from 3.6 (80/m(2)) to 7.0 g (10/m(2)). Average survival ranged from 65.5% (40/m(2)) to 72.8% (20/m(2)), while productivity ranged from 508 (10/m(2)) to 2051 kg/ha (80/m(2)). Harvested biomass showed a clear bimodal distribution in individual size classes indicating the occurrence of heterogeneous growth, which may affect management and market strategies. Harvested biomass of prawns weighing more than 7 g (the best market size) increases for stocking densities up to 40/m(2) and stabilizes between 40 and 80/m(2). Growth reduction was associated with a decreasing frequency and average weight of green claw 1 and green claw 2 male morphotypes and adult females as density increased. Thus, the distribution of male morphotypes and sexually mature females are affected by density-dependent factors. Results suggest that prawn density plays an important role on M. amazonicum grow-out phase, as has been demonstrated for other species of the genus Macrobrachium. M. amazonicum tolerates grow-out intensification and may be raised in both semi-intensive and intensive systems stocked at very high densities yielding high productivity.en
dc.description.affiliationUNESP, FCAV, Dept Biol Aplicada, Aquaculture Ctr, BR-14884900 Jaboticabal, SP, Brazil
dc.description.affiliationUnespUNESP, FCAV, Dept Biol Aplicada, Aquaculture Ctr, BR-14884900 Jaboticabal, SP, Brazil
dc.format.extent516-526
dc.identifierhttp://dx.doi.org/10.1111/j.1749-7345.2007.00125.x
dc.identifier.citationJournal of the World Aquaculture Society. Oxford: Blackwell Publishing, v. 38, n. 4, p. 516-526, 2007.
dc.identifier.doi10.1111/j.1749-7345.2007.00125.x
dc.identifier.issn0893-8849
dc.identifier.urihttp://hdl.handle.net/11449/949
dc.identifier.wosWOS:000251204300006
dc.language.isoeng
dc.publisherBlackwell Publishing
dc.relation.ispartofJournal of the World Aquaculture Society
dc.relation.ispartofjcr1.338
dc.relation.ispartofsjr0,509
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleEffect of intensification on grow out of the Amazon River prawn, Macrobrachium amazonicumen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderBlackwell Publishing
unesp.author.orcid0000-0002-8526-1052[2]

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