Trophic analysis and fishing simulation of the biggest Amazonian catfish

Angelini, Ronaldo; Fabrè, Nídia Noemi; Silva-JR, Urbano Lopes da

Trophic analysis and fishing simulation of the biggest Amazonian catfish

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dc.contributor.author	Angelini, Ronaldo
dc.contributor.author	Fabrè, Nídia Noemi
dc.contributor.author	Silva-JR, Urbano Lopes da
dc.date.accessioned	2020-12-01T00:21:47Z
dc.date.available	2020-12-01T00:21:47Z
dc.date.issued	2006-12
dc.description.resumo	Currently, it is unanimous the fact that the ecosystem approach gives important insights to support fisheries stock assessment and management and healthy sustain aquatic ecosystems. This work aims at the quantification of energy flows at várzea (Amazon floodplain) and the simulation of increase in the fishing effort regarding the biggest predators, the catfish, and decrease of flooded forest cover. It was used the Ecopath with Ecosim software to build BAGRES model, which could allow inferences on ecosystem stability. Results showed that: i) BAGRES model has high overhead (69.7%) and Production/Respiration rate very close to 1, showing that this floodplain system is sufficiently mature and capable to support disturbance; ii) Finn’s cycling index for BAGRES (14.6%) is high when compared to other worldwide system; iii) increasing the effort of the catch of three species of Brachyplatystoma (catfish) have positive effects on biomass and consequently catch and landing of their main preys; iv) in the simulation of deforestation of Floodplain Forest (with no natural regeneration), all species are prejudiced (no exception), including Brachyplatystoma groups that do not use flooded environment. Therefore, the indirect consequence of the deforestation is more intense over fish stocks than increasing fishing effort. The BAGRES model results have important implications for the current policy-making for inland fishing in Brazil, currently mostly based on “defeso” (fishing restriction season), suggesting the necessity of incorporate the impacts which drive the deforestation in Amazon Floodplain	pt_BR
dc.identifier.citation	ANGELINI, R.; FABRÉ, Nidia Noemi ; SILVA JÚNIOR, Urbano Lopes da. Trophic analysis and fishing simulation of the biggest Amazonian catfish. African Journal of Agricultural Research, v. 1, p. 151-158, 2006. Disponível em: https://academicjournals.org/journal/AJAR/article-abstract/993638D26432. Acesso em: 19 nov. 2020. https://doi.org/10.5897/AJAR.9000747	pt_BR
dc.identifier.doi	10.5897/AJAR.9000747
dc.identifier.issn	1991-637X
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/30799
dc.language	en	pt_BR
dc.publisher	Academic Journals	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Brachyplatystoma sp	pt_BR
dc.subject	Várzea, Amazon floodplain	pt_BR
dc.subject	Fisheries	pt_BR
dc.subject	Ecopath with Ecosim	pt_BR
dc.title	Trophic analysis and fishing simulation of the biggest Amazonian catfish	pt_BR
dc.type	article	pt_BR