Peixes do Complexo Estuarino de Paranaguá, Atlântico Sul Oeste

The objective of this work was to present an updated checklist of the currently known fishes in the Paranagua Estuarine Complex (PEC) and provides comments on conservation status for the treated species. We used a large dataset derived from a pool of studies which have been conducted within there along the last 30 years. Each study was based on monthly samplings and conducted in several estuarine habitat; thus, the pool covers practically all estuarine habitats and takes into account the seasonal cycle in the system. The PEC ichthyofauna represents a mixture between that fauna typical from the tropical Brazilian coast and that with affinities of temperate Argentinean and Uruguayan zones. The PEC harbors a rich fish fauna of 213 species, inserted in the families that are common along the Brazilian coast. Only a minor part (8%) of the PEC fish fauna was evaluated as regards the conservation status, mostly because of the lack of basic biological and ecological information for most species. Despite part of the among-estuaries differences are due to different and incomplete sampling efforts, the richness in the PEC is surprisingly higher than other systems in Brazil and around world, which emphasize the importance of the region for global biodiversity conservation.CAPES Foundatio

Partiçăo inter-especifica e efeitos sazonais, espaciais e ontogeneticos no uso de recursos troficos por seis teleostei em um sistema estuarino sub-tropical /

Orientador : Prof. Dr. Henry Louis SpachDissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Cięncias Biológicas, Programa de Pós-Graduaçăo em Zoologia. Defesa: Curitiba, 2008Inclui bibliografiaArea de concentraçăo: Zoologi

Local and multidecadal ecological patterns of fish fauna in Cacanéia-Iguape estuary

O objetivo desta tese é identificar e descrever variações espacial, sazonal e multidecadal, com dados históricos, e padrões ecológicos locais na ictiofauna do estuário Cananéia-Iguape (ECI) em relação a fatores ecológicos naturais e/ou aqueles induzidos pelo aporte exógeno do rio Ribeira de Iguape (RI) através do canal artificial Valo Grande (VG). Demonstrou-se a relação de atributos hidrológicos, sazonalidade e espacialidade com a estruturação da diversidade da assembléia no infralitoral inconsolidado em escala local (i.e. dentro de um setor estuarino do ECI, a baía do Trapandé) utilizando delineamento amostral espacial e sazonalmente estratificado com amostragens mensais (julho/2009 junho/2010) com rede otter-trawl. Identificaram-se dois padrões locais na estrutura da assembleia: persistência sazonal de maior riqueza e abundância no interior (ambientalmente favorável) do que foz da baía (hidrodinamicamente instável) e variabilidade dessa estrutura espacial pelo efeito da interação entre profundidade, temperatura e ritmos sazonais populacionais. O ECI abrigou 246 espécies entre 1962 e 2010 e 214 entre 1993 e 2010. De acordo com extrapoladores matemáticos, há mais de 173 espécies no habitat demersal do eixo sul. Durante o período chuvoso, riqueza e abundância na ictiofauna do eixo sul aumentam com o incremento do recrutamento e agregações reprodutivas, estimuladas pelo pico de produtividade no ECI, e das migrações massivas à jusante, devido à forte redução das condições estuarinas no eixo norte. Propõe-se uma metacomunidade organizada por efeitos de massa entre a assembleia da baía do Trapandé e o pool regional de populações marinhas. A degradação das condições estuarinas pelo aporte do RI limitou a dispersão de espécies estuarino-residentes e marinho-migrantes no ECI. Isso determinou um gradiente espacial de perda generalizada de abundância, riqueza e diversidade funcional acompanhando consistentemente o gradiente espacial de impacto. O sinal desse efeito antrópico foi suficientemente elevado para ser detectado mesmo sob interferência de outras fontes de variabilidade espacial, temporal e ambiental. A redução da vazão do RI ao ECI para sua recuperação ecológica, estabelecida pelas autoridades governamentais, é uma medida que também restaurará a dispersão multiespecífica e, assim, a funcionalidade ecossistêmica da ictiofaunaThe aim of the present thesis is to identify and describe spatial, seasonal, and multidecadal variations, by using historical data, and local ecological patterns in the fish fauna of the Cananéia-Iguape Estuary (ECI) in relation to ecological factors and/or factors derived from the exogenous discharge of the Ribeira de Iguape River (RI) flowing through the Valo Grande artificial channel. It was demonstrated the relation of hydrological attributes, seasonality, and spatiality with the beta diversity of the soft bottom infralitoral fish assemblage in local scale (i.e. within an ECI estuarine sector, the Trapandé Bay) with a seasonally and spatially stratified sampling design and monthly sampling (July/2009 June/2010) using otter-trawl net. Two patterns were identified: (I) fish species richness and abundance were higher and seasonally persistent in inner (environmentally favorable habitat) than in outer sector of bay; and (II) a variability of this fish faunas spatial structure induced by the effect of the interaction among depth, water temperature, and seasonal rhythms of fish populations. ECI hold 246 fish species between 1962 and 2010 and 214 species between 1993 and 2010. Mathematic extrapolators estimated > 173 species in the south axis of ECI. In rainy season, fish species richness and abundance in south axis increase with increasing (I) massive immigration of individuals from north axis of ECI due to the highest RI discharge and lowest salinity; (II) massive recruitments and reproductive aggregations and activities, which are coupled with the peak of primary and secondary productivity in ECI. It is proposed the existence of a metacommunity ruled by mass effect between assemblage of Trapandé bay and regional pool of marine populations. The degradation of ECIs estuarine conditions due to RI inflow limited multispecific dispersion among resident estuarine and marine species. This resulted in a spatial gradient of generalized loss in abundance, richness, and function in the fish fauna structure that strongly follow the spatial gradient of impact. The signal of this anthropogenic effect was enough high to be revealed even under interference from other sources of environmental, spatial, and temporal variability. The reduction of RI inflow to ECI in order to recover its ecological estuarine conditions is a governmental authorities correct decision to also recover the fish dispersion and, thus, the ecosystem functionality of fish faun

Partiçăo inter-especifica e efeitos sazonais, espaciais e ontogeneticos no uso de recursos troficos por seis teleostei em um sistema estuarino sub-tropical /

Orientador : Prof. Dr. Henry Louis SpachDissertaçăo (mestrado) - Universidade Federal do Paraná, Setor de Cięncias Biológicas, Programa de Pós-Graduaçăo em Zoologia. Defesa: Curitiba, 2008Inclui bibliografiaArea de concentraçăo: Zoologi

Checklist of the fish fauna of the Araçá Bay, São Sebastião Channel, northern coast of São Paulo, Brazil

This paper presents for the first time a checklist of the fish fauna of Araça Bay, São Sebastião Channel, northern coast of São Paulo state, Brazil. Fishes were sampled in five surveys from October 2012 to February 2014 using nine different types of sampling gear during high tide. Tide pool fishes were also sampled in four surveys from March to October 2014. Geographic distribution and conservation status of each species are reported. A total of 126 species was recorded in Araçá Bay, including two non-native species and new records in the São Sebastião region for 16 species. The fish species richness found in Araçá Bay was greater than the previously recorded for the São Sebastião Channel and other adjacent areas. Most of the Araçá fish species show a wide distribution along the western Atlantic Ocean (32%). Few species are included in the international (29%) and Brazilian (3.3%) official lists of threatened species

Checklist of the fish fauna of the Araçá Bay, São Sebastião Channel, northern coast of São Paulo, Brazil

This paper presents for the first time a checklist of the fish fauna of Araça Bay, São Sebastião Channel, northern coast of São Paulo state, Brazil. Fishes were sampled in five surveys from October 2012 to February 2014 using nine different types of sampling gear during high tide. Tide pool fishes were also sampled in four surveys from March to October 2014. Geographic distribution and conservation status of each species are reported. A total of 126 species was recorded in Araçá Bay, including two non-native species and new records in the São Sebastião region for 16 species. The fish species richness found in Araçá Bay was greater than the previously recorded for the São Sebastião Channel and other adjacent areas. Most of the Araçá fish species show a wide distribution along the western Atlantic Ocean (32%). Few species are included in the international (29%) and Brazilian (3.3%) official lists of threatened species