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Previous issue date: 2009-11-25 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Spatial-temporal dynamics of zooplankton in the Caravelas river estuary (Bahia, Brazil). The survey was conducted in order to describe the zooplankton community of the estuary Caravelas (Bahia, Brazil), to quantify and relate the patterns of horizontal and vertical transport with the type of tide (neap and spring) and tidal phase (flood and ebb). Zooplankton samples were collected with the aid of a suction pump (300L), filtered in plankton nets (300μm) and fixed in saline formalin 4%. Samples were collected at a fixed point (A1), near the mouth of the estuary, with samples taken at neap tides and spring tides during the dry and rainy seasons. Samples were collected for 13 hours, at intervals of 1 hour in 3 depths: surface, middle and bottom. Simultaneous collection of biological, we measured the current velocity, temperature and salinity of the water through CTD. In the laboratory, samples were selected for analysis in estereomicroscope, with 25 groups identified, with Copepoda getting the highest number of species. The 168 samples obtained from temporal samples were subsampled and processed on equipment ZooScan, with the aid of software ZooProcess at the end were generated 458.997 vingnettes. 8 taxa were identified automatically, with 16 classified as a semi-automatic. The group Copepoda, despite the limited taxonomic refinement ZooScan, obtained 2 genera and 1 species identified automatically. Among the seasons dry and wet groups Brachyura (zoea), Chaetognatha, and the Calanoid copepods (others), Temora spp., Oithona spp. and Euterpina acutifrons were those who had higher frequency of occurrence, appearing in more than 70% of the samples. Copepoda group showed the largest percentage of relative abundance in both seasons. There was no seasonal variation of total zooplankton, with an average density of 7826?4219 org.m-3 in the dry season, and 7959?3675 org.m-3 in the rainy season, neither between the types and phases of the tides, but seasonal differences were significant recorded for the main zooplankton groups. Vertical stratification was seen for the major zooplankton groups (Brachyura, Chaetognatha, Calanoida (other), Oithona spp, Temora spp. e Euterpina acutifrons). The scale of this stratification varied with the type (square or tide) and tidal phase (flood or ebb). The instantaneous transport was more influenced by current velocity, with higher values observed in spring tides to the total zooplankton, however, there was a variation of this pattern depending on the zooplankton group. According to the data import and export of total zooplankton, the outflow of organisms of the estuary was higher than the input. The results suggest that the estuary of Caravelas may influence the dynamics of organic matter to the adjacent coast, with possible consequences in National Marine Park of Abrolhos / Din?mica espacial e temporal do zoopl?ncton no estu?rio do rio Caravelas (Bahia, Brasil). A pesquisa foi realizada no intuito de descrever a comunidade zooplanct?nica do estu?rio do rio Caravelas (Bahia, Brasil), al?m de quantificar e relacionar os padr?es de transporte horizontal e vertical com os tipos de mar? (quadratura e siz?gia) e fases de mar? (enchente e vazante). As amostras do zoopl?ncton foram coletadas com aux?lio de bomba de suc??o (300L), filtradas em redes de pl?ncton (300μm) e fixadas em solu??o salina de formol a 4%. As coletas foram realizadas em um ponto fixo (A1), pr?ximo a desembocadura do estu?rio, com amostras obtidas nas mar?s de quadratura e siz?gia durante os per?odos seco e chuvoso. As amostragens foram feitas durante 13 horas, em intervalos de 1 hora, em 3 n?veis de profundidade: superf?cie, meio e fundo. Simult?nea ? coleta biol?gica, foram medidos a velocidade das correntes, temperatura e salinidade da ?gua, atrav?s de CTD. Em laborat?rio, amostras foram selecionadas para an?lise em lupa, sendo 25 grupos identificados, com Copepoda obtendo o maior n?mero de esp?cie. As 168 amostras provindas das coletas temporais foram subamostradas e processadas no equipamento ZooScan, com aux?lio do software ZooProcess, ao final foram geradas 458.997 vinhetas. Foram identificados 8 t?xons automaticamente, com mais 16 classificados de forma semi-autom?tica. O grupo Copepoda, apesar do refinamento taxon?mico limitado do ZooScan, obteve 2 g?neros e 1 esp?cie identificada de maneira autom?tica. Entre as campanhas seca e chuvosa os grupos Brachyura (zoea), Chaetognatha, al?m dos cop?podes Calanoida (outros), Temora spp., Oithona spp. e Euterpina acutifrons foram os que tiveram maior freq??ncia de ocorr?ncia, aparecendo em mais de 70% das amostras. O grupo Copepoda foi o que apresentou os maiores percentuais de abund?ncia relativa em ambas as campanhas. N?o houve varia??o sazonal do zoopl?ncton total, com densidade m?dia de 7826?4219 org.m-3 no per?odo seco, e 7959?3675 org.m-3 no chuvoso, nem entre os tipos e fases das mar?s, contudo diferen?as sazonais significativas foram registradas para os principais grupos zooplanct?nicos. Foi vista estratifica??o vertical para os principais grupos zooplanct?nicos (Brachyura, Chaetognatha, Calanoida (outros), Oithona spp, Temora spp. e Euterpina acutifrons). A amplitude desta estratifica??o variou com o tipo (quadratura ou siz?gia) ou fase de mar? (enchente ou vazante). O transporte instant?neo foi mais influenciado pela velocidade das correntes, com maiores valores observados nas mar?s de siz?gia para o zoopl?ncton total, entretanto, houve varia??o deste padr?o dependendo do grupo zooplanct?nico. De acordo com os dados de importa??o e exporta??o do zoopl?ncton total, o fluxo de sa?da de organismos do estu?rio foi superior ? entrada. Os resultados sugerem que a regi?o estuarina de Caravelas pode exercer influ?ncia na din?mica de mat?ria para a ?rea costeira adjacente, com poss?veis reflexos no Parque Nacional Marinho dos Abrolhos
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12488 |
| Date | 25 November 2009 |
| Creators | Cabral, Camila Rodrigues |
| Contributors | CPF:05325518852, Sant'ana, Eneida Maria Eskinazi, CPF:44961170453, Schwamborn, Ralf, CPF:05234783723, http://lattes.cnpq.br/8733048825246392, Attayde, Jos? Luiz, CPF:03130326707, http://lattes.cnpq.br/4121209629385349, Lopes, Rubens M. |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Bioecologia Aqu?tica, UFRN, BR, Bioecologia Aqu?tica |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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