Population structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazil

Página do item simplificado
dc.contributor.authorCosta Novaes, Jose Luis
dc.contributor.authorCarvalho, Edmir Daniel [UNESP]
dc.contributor.institutionUniversidade Federal Rural do Semi-Árido (UFERSA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:52:01Z
dc.date.available2014-05-20T13:52:01Z
dc.date.issued2011-03-01
dc.description.abstractHoplias malabaricus is a viable economic alternative for artisanal fishermen who used to live on the banks of rivers that now are dammed in Brazil. In order to preserve the species' natural stock, the main objectives. of this study were to obtain bio-ecological information on this species reproduction, feeding dynamics and the description of the extent of its exploitation in river-reservoir transition area in Brazil. This way, from January to December 2005, different fishery catches were made with gill nets by artisanal fishermen, and a total of 426 individual H. malabaricus were obtained and sampled. From each specimen, the following biometric and biological data were analyzed: standard length, total weight. stomach contents, reproductive Caul such as sex, weight and gonadal maturation stage; with these data we estimated sex ratio, reproduction period and feeding habits. To assess growth parameters and infer on the degree of exploitation, the standard length frequency data were analysed using the FISAT (ELEFAN I) computer program. Data revealed a sex ratio of 0.8:1 (M:F), that reproduction occurs all year around, being more intense during spring and summer; it also showed that H. malabaricus is piscivorous. The growth parameters and mortality were estimated at: L(infinity)=35.18cm, k=0.32 year longevity=9.3 years, Z=1.25 years, M=0.63 year and F=0.62 year. The weight-length relation hip was: In Wt=-3.1.663+2.7456 In Lp. The yield-per-recruit analysis produced the following values: E=0.496, E(max)=0.916, E(0.1)=0.701 and E(0.5)=0.378. Overall, our data suggest that the stock of H. malabaricus is not yet overfished in the studied area. Rev. Biol. Trop. 59(1): 71-83. Epub 2011 March 01.en
dc.description.affiliationUniversidade Federal Rural do Semi-Árido (UFERSA), Dept Ciencias Anim, BR-59625900 Mossoro, RN, Brazil
dc.description.affiliationUniv Estadual Paulista, Dept Morfol, Inst Biociencias, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Morfol, Inst Biociencias, BR-18618000 Botucatu, SP, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent71-83
dc.identifierhttp://dx.doi.org/10.15517/rbt.v59i1.3179
dc.identifier.citationRevista de Biologia Tropical. San Jose: Revista de Biologia Tropical, v. 59, n. 1, p. 71-83, 2011.
dc.identifier.fileWOS000289448100006.pdf
dc.identifier.issn0034-7744
dc.identifier.urihttp://hdl.handle.net/11449/18582
dc.identifier.wosWOS:000289448100006
dc.language.isoeng
dc.publisherRevista de Biologia Tropical
dc.relation.ispartofRevista de Biologia Tropical
dc.relation.ispartofjcr0.511
dc.relation.ispartofsjr0,326
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectmortalityen
dc.subjectreproductionen
dc.subjectfeedingen
dc.subjectHoplias malabaricusen
dc.subjectUpper Paranaen
dc.subjectyield-per-recruiten
dc.subjectgrowthen
dc.titlePopulation structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazilen
dc.typeArtigo
dcterms.rightsHolderRevista de Biologia Tropical
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

Arquivos

Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
WOS000289448100006.pdf
Tamanho:
631.43 KB
Formato:
Adobe Portable Document Format
Descrição:
Baixar
Licença do Pacote
Agora exibindo 1 - 2 de 2
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:

Coleções

Artigos - Morfologia - IBB