Brazilian Journal of Oceanography最新文献_第9页

Allometric models for estimating the aboveground biomass of the mangrove Rhizophora mangle 红树林地上生物量估算的异速模型

Brazilian Journal of Oceanography Pub Date : 2017-03-01 DOI: 10.1590/S1679-87592017127006501

H. R. S. Santos, Francisco Sandro Rodrigues Hollanda, T. D. O. Santos, K. V. S. D. Andrade, Mykael Bezerra Santos Santana, G. C. Estrada, M. Soares

{"title":"Allometric models for estimating the aboveground biomass of the mangrove Rhizophora mangle","authors":"H. R. S. Santos, Francisco Sandro Rodrigues Hollanda, T. D. O. Santos, K. V. S. D. Andrade, Mykael Bezerra Santos Santana, G. C. Estrada, M. Soares","doi":"10.1590/S1679-87592017127006501","DOIUrl":"https://doi.org/10.1590/S1679-87592017127006501","url":null,"abstract":"O desenvolvimento de modelos alometricos especie-especificos e fundamental para a melhoria das estimativas de biomassa aerea, bem como para a estimativa do estoque e sequestro de carbono em florestas de mangue. Este estudo desenvolveu equacoes alometricas para estimar a biomassa aerea de Rhizophora mangle nos manguezais do estuario do rio Sao Francisco, nordeste do Brasil. Usando uma amostra de 74 arvores, analises de regressao linear simples foram usadas para testar a dependencia da biomassa (total e por parte da planta) do tamanho, considerando dados transformados (Ln) e nao transformados. As melhores equacoes foram aquelas com menor erro padrao da estimativa (SEE) e maior coeficiente de determinacao ajustado (R2a). As equacoes ln-transformadas apresentaram melhores resultados, com R2a proximo a 0,99 na maioria dos casos. As equacoes para partes reprodutivas apresentaram valores baixos de R2a, o que pode ser atribuido ao carater sazonal deste compartimento. \"Area basal2×Altura\" demonstrou ser o melhor preditor, presente na maioria das equacoes melhor ajustadas. Os modelos aqui apresentados podem ser considerados preditores confiaveis da biomassa aerea de R. mangle no manguezal do Nordeste brasileiro, bem como em qualquer local onde esta especie de ampla distribuicao assemelhe-se a arquitetura das arvores utilizadas no presente estudo.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"65 1","pages":"44-53"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S1679-87592017127006501","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49590910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Carbon regeneration in the Cariaco Basin, Venezuela 委内瑞拉Cariaco盆地的碳再生

Brazilian Journal of Oceanography Pub Date : 2017-03-01 DOI: 10.1590/S1679-87592017121406501

A. Márquez, A. Dale, Luis Troccoli Ghinaglia, F. Monroy, W. Senior, A. Ríos, F. Karger, Y. Astor, R. Varela

{"title":"Carbon regeneration in the Cariaco Basin, Venezuela","authors":"A. Márquez, A. Dale, Luis Troccoli Ghinaglia, F. Monroy, W. Senior, A. Ríos, F. Karger, Y. Astor, R. Varela","doi":"10.1590/S1679-87592017121406501","DOIUrl":"https://doi.org/10.1590/S1679-87592017121406501","url":null,"abstract":"The carbon regeneration in the water column of the Cariaco Basin (Venezuela) was investigated using a regression model of total alkalinity (TA) and the concentration of total inorganic carbon (TCO2). Primary productivity (PP) was determined from the inorganic carbon fraction assimilated by phytoplankton and the variation of the 22 and 23oC isotherm was used as an indicator of coastal upwelling. The results indicate that CO2 levels were lowest (1962 µmol/kg) at the surface and increased to 2451 µmol/kg below the oxic-anoxic redox interface. The vertical regeneration distribution of carbon was dominated (82%) by organic carbon originating from the soft tissue of photosynthetic organisms, whereas 18% originated from the dissolution of biogenic calcite. The regeneration of organic carbon was highest in the surface layer in agreement with the primary productivity values. However, at the oxic-anoxic interface a second more intense maximum was detected (70-80%), generated by chemotrophic respiration of organic material by microorganisms. The percentages in the anoxic layers were lower than in the oxic zone because aerobic decomposition occurs more rapidly than anaerobic respiration of organic material because more labile fractions of organic carbon have already been mineralized in the upper layers.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"65 1","pages":"19-28"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S1679-87592017121406501","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46466917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spectral variability in high frequency in sea level and atmospheric pressure on Buenos Aires Coast, Argentina 阿根廷布宜诺斯艾利斯海岸海平面和大气压力高频谱变化

Brazilian Journal of Oceanography Pub Date : 2017-03-01 DOI: 10.1590/S1679-87592017130506501

I. Pérez, Dragani Walter

{"title":"Spectral variability in high frequency in sea level and atmospheric pressure on Buenos Aires Coast, Argentina","authors":"I. Pérez, Dragani Walter","doi":"10.1590/S1679-87592017130506501","DOIUrl":"https://doi.org/10.1590/S1679-87592017130506501","url":null,"abstract":"There are some observational evidences which support that atmospheric gravity waves constitute an efficient forcing for meteorological tsunamis (meteotsunamis) along the coast of Buenos Aires, Argentina. Meteotsunamis and atmospheric gravity waves, which propagate simultaneously on the sea surface and the atmosphere, respectively, are typical examples of non-stationary geophysical signals. The variability of meteotsunamis and atmospheric gravity waves recorded at Mar del Plata was investigated in this paper. Results obtained in this work reinforce the idea of a cause (atmospheric gravity waves) effect (meteotsunami) relationship, because wavelet spectra obtained from both signals resulted quite similar. However, several very short episodes of mod-erate/low activity of atmospheric gravity waves were detected without detecting meteotsunami activity. On the other hand, it was found that atmospheric gravity wave spectral energy can appear in the wavelets as a single or multiple burst as relatively long and irregular events or as regular wave packets. Results obtained in this paper provide original spectral data about atmospheric gravity waves along the coast of Buenos Aires. This information is useful to be included in realistic numerical models in order to investigate the genesis of this complex atmosphere-ocean interaction.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"65 1","pages":"69-78"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S1679-87592017130506501","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49123587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Ichthyofauna as an environmental quality indicator of the Bertioga Channel, São Paulo (Brazil) 作为圣保罗贝尔蒂奥加海峡环境质量指标的鱼类（巴西）

Brazilian Journal of Oceanography Pub Date : 2017-03-01 DOI: 10.1590/S1679-87592017125206501

J. Dias, M. Rocha, T. C. Schmidt, Bárbara Capelari Villamarin, D. B. Morais

{"title":"Ichthyofauna as an environmental quality indicator of the Bertioga Channel, São Paulo (Brazil)","authors":"J. Dias, M. Rocha, T. C. Schmidt, Bárbara Capelari Villamarin, D. B. Morais","doi":"10.1590/S1679-87592017125206501","DOIUrl":"https://doi.org/10.1590/S1679-87592017125206501","url":null,"abstract":"O objetivo deste estudo foi investigar a estrutura da ictiofauna na regiao da desembocadura norte do Canal de Bertioga (Sao Paulo, Brasil) e os possiveis efeitos da perda da qualidade ambiental. As amostras foram coletadas mensalmente de setembro a dezembro de 2005, em duas estacoes oceanograficas, com rede de arrasto. A estrutura da fauna de peixes foi avaliada por indicadores ecologicos e a qualidade ambiental por curvas ABC e um indice de comunidades de peixes estuarinos (EFCI). Um total de 1553 individuos em 50 especies foi amostrado. Ariidae e Sciaenidae totalizaram 60% e Cathorops spixii representou 36% de todos os especimes coletados. Maior riqueza e diversidade ecologica foram registradas em dezembro, enquanto a maior abundância numerica foi encontrada em outubro. A maioria das especies foi representada por juvenis. As analises de agrupamento e de correspondencia canonica mostraram uma diferenca consistente e clara entre as estacoes de amostragem, e os fatores abioticos analisados (temperatura, profundidade e salinidade) parecem nao ter influencia sobre a estrutura da comunidade. A curva ABC sugeriu um ambiente moderadamente perturbado e o EFCI permitiu classificar a area como \"pobre\", a partir das 12 metricas analisadas, que consideraram a reducao da diversidade especifica, a composicao e a abundância, bem como a modificacao na funcao de bercario/infantario e a integridade trofica da area. Futuros estudos devem se concentrar em analisar conjuntamente os indicadores quimicos da agua, do sedimento e os indicadores biologicos, para confirmar a condicao da ictiofauna da desembocadura norte do Canal de Bertioga.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"65 1","pages":"29-43"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S1679-87592017125206501","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46548275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Metals impact into the Paranaguá Estuarine Complex (Brazil) during the exceptional flood of 2011 2011年特大洪水期间，金属对巴拉那瓜河口综合体（巴西）的影响

Brazilian Journal of Oceanography Pub Date : 2017-03-01 DOI: 10.1590/S1679-87592017127706501

M. L. Rocha, F. Sá, Mônica Soares de Campos, M. Grassi, Tatiane Combi, E. Machado

{"title":"Metals impact into the Paranaguá Estuarine Complex (Brazil) during the exceptional flood of 2011","authors":"M. L. Rocha, F. Sá, Mônica Soares de Campos, M. Grassi, Tatiane Combi, E. Machado","doi":"10.1590/S1679-87592017127706501","DOIUrl":"https://doi.org/10.1590/S1679-87592017127706501","url":null,"abstract":"Particulate and dissolved metal concentrations were determined after the largest flood in the last 30 years on the east-west axis of the Paranagua Estuarine Complex (PEC) and compared to the those of the dry period at two stations. Results confirmed that the flood greatly affected riverine outflows and the behavior of metals in the PEC. In particular, a sharp decrease in salinity was followed by extremely high SPM concentrations leading to a decrease in DO concentrations at both stations. For the dissolved phase, ANOSIM analysis showed a significant dissimilarity at each station between the sampled periods, whereas for the particulate phase this dissimilarity was found only for the samplings taken at the Antonina Station. KD values suggested dissolved Cu behavior was related to the presence of organic complexes and dissolved Mn had sediment resuspension of redox sediments and or/pore water injection as sources. Metal concentrations were lower than in polluted estuaries, though high enrichment factors found after the flood pointed to the influence of anthropogenic sources. In conclusion, the flood's influence was more evident at the Antonina Station, due to its location in the upper estuary, whereas in Paranagua a high SPM content with low metal concentration was found, following the common pattern generally found in other marine systems subject to heavy rainfall events.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"65 1","pages":"54-68"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S1679-87592017127706501","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42752995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Length-weight relation, condition factor and gonadosomatic index of the whitemouth croaker, Micropogonias furnieri (Desmarest, 1823) (Actinopterygii: Sciaenidae), caught in Lençóis Bay, state of Maranhão, eastern Amazon, Brazil 巴西东部亚马逊河马兰赫<e:1>奥州Lençóis湾捕获的白口鱼Micropogonias furnieri (Desmarest, 1823)(放线鱼科:松花鱼科)的长重关系、条件因子和促性腺指数

Brazilian Journal of Oceanography Pub Date : 2017-03-01 DOI: 10.1590/S1679-87592017110506501

J. W. J. Azevedo, A. L. C. Castro, M. H. L. Silva

{"title":"Length-weight relation, condition factor and gonadosomatic index of the whitemouth croaker, Micropogonias furnieri (Desmarest, 1823) (Actinopterygii: Sciaenidae), caught in Lençóis Bay, state of Maranhão, eastern Amazon, Brazil","authors":"J. W. J. Azevedo, A. L. C. Castro, M. H. L. Silva","doi":"10.1590/S1679-87592017110506501","DOIUrl":"https://doi.org/10.1590/S1679-87592017110506501","url":null,"abstract":"The whitemouth croaker, Micropogonias furnieri, which is exploited off the state of Maranhao, Brazil, reinforces the need for maintenance programs of natural stocks of this species to assist in the management of this exploited resource. The aim of the present study was to describe aspects regarding its reproductive characteristics (gonadosomatic index and condition factor) and also the length distribution and weight-length relationships. The fish were caught in Lencois Bay in the state of Maranhao (eastern Amazon) between June 2010 and July 2011. A total of 570 individuals were caught (318 males and 252 females). Differences in length were found between the sexes, with females larger than males. The sex ratio indicated a tendency for females to be more abundant in the rainy season (first semester), whereas males predominated in the dry season (second semester). The weight-length relationship indicated negative allometric growth for both sexes. The analysis of the variation in the condition factor suggests that lower values coincided with higher gonadosomatic index values and that this factor is a good reproductive indicator for M. furnieri in the region.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"17 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S1679-87592017110506501","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67425109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Does the closed fishing season influence the ichthyofauna consumed by Larus dominicanus 休渔期是否会影响多米尼加月桂鱼消耗的鱼系动物

Brazilian Journal of Oceanography Pub Date : 2017-03-01 DOI: 10.1590/S1679-87592017112206501

Maiara Larissa Miotto, B. Carvalho, H. Spach

{"title":"Does the closed fishing season influence the ichthyofauna consumed by Larus dominicanus","authors":"Maiara Larissa Miotto, B. Carvalho, H. Spach","doi":"10.1590/S1679-87592017112206501","DOIUrl":"https://doi.org/10.1590/S1679-87592017112206501","url":null,"abstract":"As capturas incidentais de peixes no arrasto do camarao representam um recurso abundante para a alimentacao de muitas aves, sobretudo para a gaivota Larus dominicanus. O presente estudo avaliou a influencia do defeso da pesca de arrasto do camarao sobre a dieta de L. dominicanus no litoral do estado do Parana. Entre dezembro de 2013 e agosto de 2014 foram coletados 10 pellets alimentares por mes em duas areas distintas, em periodos sem e com a influencia do defeso do camarao sete-barbas. Ao todo, foram identificados 920 peixes, divididos em quatro familias e 15 especies, com destaque para a familia Sciaenidae, com 11 especies. Foram identificadas diferencas na abundância e biomassa das especies entre as areas e entre os periodos de pre-defeso, defeso e pos-defeso. Diferencas em relacao ao comprimento total medio das especies so foram encontradas entre o pre-defeso e defeso em uma das areas. Com este trabalho, foi possivel observar a forte relacao entre L. dominicanus e a pesca de arrasto do camarao, a composicao das especies identificadas nos pellets e as estimativas de comprimento seguem o mesmo padrao do que a literatura traz para os peixes descartados nas atividades de arrasto.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"65 1","pages":"9-18"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46985779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Length-weight relationships and condition factor of eight fish species inhabiting the Rocha Lagoon, Uruguay 乌拉圭罗查泻湖八种鱼类的长重关系和条件因子

Brazilian Journal of Oceanography Pub Date : 2017-03-01 DOI: 10.1590/S1679-87592017107306501

C. Rodriguez, O. Galli, D. Olsson, J. Tellechea, W. Norbis

{"title":"Length-weight relationships and condition factor of eight fish species inhabiting the Rocha Lagoon, Uruguay","authors":"C. Rodriguez, O. Galli, D. Olsson, J. Tellechea, W. Norbis","doi":"10.1590/S1679-87592017107306501","DOIUrl":"https://doi.org/10.1590/S1679-87592017107306501","url":null,"abstract":"Length-weight relationships are commonly used in fisheries biology to convert length measures into weight and to ascertain the growth characteristics related to those variables. On the other hand, length-weight relationships are used for estimating fishes’ condition factor, and these values are used for comparing the “condition”, “fatness” or “well-being” of fish (LE CREN, 1951; FROESE, 2006). The condition factor could reflect the physiological state of a fish, which is influenced by both intrinsic (gonadal development, organic reserves, presence or absence of food in the gut) and extrinsic (food availability, environmental variability) factors (NIKOLSKY, 1969). The coastal lagoons on the south-eastern Uruguayan Atlantic coast (Jose Ignacio, Garzon, Rocha, Castillo, and Negra) serve as feeding (NORBIS; GALLI, 2004; OLSSON et al., 2013), reproduction (VIZZIANO et al., 2002), nursery grounds (SANTANA; FABIANO, 1999) and growing areas (BORTHAGARAY et al., 2011) for several marine and estuarine fishes which sustain local artisanal fisheries (SANTANA; FABIANO, 1999; SAONA et al., 2003; FABIANO; SANTANA, 2006). The Rocha Lagoon is a shallow, brackish, microtidal lagoon (area=72 km","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"65 1","pages":"97-100"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46934049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Hyperiid amphipods around the seamounts and islands off northeastern Brazil 巴西东北部海山和岛屿周围的超足类片脚类动物

Brazilian Journal of Oceanography Pub Date : 2016-12-01 DOI: 10.1590/S1679-87592016123306404

C. S. Souza, Laura Rodrigues da Conceição, P. Júnior

引用次数: 5

Survey sampling for fisheries monitoring in Brazil: implementation and analysis 巴西渔业监测调查抽样:实施和分析

Brazilian Journal of Oceanography Pub Date : 2016-12-01 DOI: 10.1590/S1679-87592016132706404

L. Miranda, P. Kinas, G. G. Moreira, R. C. Namora, Marcus Henrique Carneiro

引用次数: 4