Successful invasion of the Amazon Coast by the giant river prawn, macrobrachium rosenbergii: Evidence of a reproductively viable population

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dc.contributor.authorIketani, Gabriel
dc.contributor.authorAviz, Manoel Alessandro Borges
dc.contributor.authorMaciel, Cristiana
dc.contributor.authorValenti, Wagner [UNESP]
dc.contributor.authorSchneider, Horacio
dc.contributor.authorSampaio, Iracilda
dc.contributor.institutionUniversidade Federal do Oeste do Pará - UFOPA
dc.contributor.institutionUniversidade Federal do Pará (UFPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:04:03Z
dc.date.available2018-12-11T17:04:03Z
dc.date.issued2016-07-01
dc.description.abstractMacrobrachium rosenbergii has been introduced into a number of countries, and in some of these, it has already been frequently captured in the wild. As for any other exotic species, its success in new habitats is related primarily to its reproductive capacity. For the present study we evaluated the reproductive capacity of an introduced population of M. rosenbergii in estuaries of the Amazon Coast, north Brazil. A total of 588 specimens (305 males and 283 females) were captured during 24 months. Of the females, 82 (28.9%) were incubating eggs, and 62 (21.9%) had recently spawned. In addition, more than 70% of the females had mature or maturing gonads. Mean fecundity was 55,000 eggs, with a minimum of 9,086, and a maximum of 192,172 eggs. Ovigerous females were captured throughout the study period, indicating continuous reproduction. Adult males are known to present three morphotypes, all of which were observed in the present study, but with a predominance of the intermediary Orange Claw morphotype (48%). The body length and weight of males were greater than in females. Different size classes were observed for both sexes during the study period suggesting a continued recruitment of new individuals to the population over the time. The species has been harvested from the wild for more than ten years, being interrupted during the period when the river is flooded. This may function as a natural interval for the recovery of stocks, which may favor the establishment of a sustainable population over the long term. We conclude that the exotic population of M. rosenbergii in eastern Amazonia is capable of reproducing itself and probably has the capacity to persist over future generations, causing a strong impact on native species. Given this, it is important to continue monitoring the progress of this species and its potential effects on the biodiversity of the Amazon basin.en
dc.description.affiliationLaboratório de Genética e Biodiversidade Universidade Federal do Oeste do Pará - UFOPA
dc.description.affiliationLaboratório de Aquicultura Instituto de Estudos Costeiros-IECOS Universidade Federal do Pará - UFPA
dc.description.affiliationInstituto de Biociências Universidade Estadual Paulista– UNESP Campus do Litoral Paulista
dc.description.affiliationLaboratório de Genética e Biologia Molecular Inst. de Estudos Costeiros - IECOS Universidade Federal do Pará - UFPA
dc.description.affiliationUnespInstituto de Biociências Universidade Estadual Paulista– UNESP Campus do Litoral Paulista
dc.format.extent277-286
dc.identifierhttp://dx.doi.org/10.3391/ai.2016.11.3.06
dc.identifier.citationAquatic Invasions, v. 11, n. 3, p. 277-286, 2016.
dc.identifier.doi10.3391/ai.2016.11.3.06
dc.identifier.issn1818-5487
dc.identifier.issn1798-6540
dc.identifier.scopus2-s2.0-84977585881
dc.identifier.urihttp://hdl.handle.net/11449/173189
dc.language.isoeng
dc.relation.ispartofAquatic Invasions
dc.relation.ispartofsjr1,115
dc.relation.ispartofsjr1,115
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectBiological invasion
dc.subjectExotic species
dc.subjectPalaemonidae and Amazonia
dc.subjectPrawn reproduction
dc.titleSuccessful invasion of the Amazon Coast by the giant river prawn, macrobrachium rosenbergii: Evidence of a reproductively viable populationen
dc.typeArtigo

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