Correntes E Massas De Água Na Plataforma Continental

Filho, Belmiro Mendes de Castro; Pereira, Adriene Ferreira; Caroli, Alexandre de; Neto, Hermínio Foloni; Paschoal, Gabriel Carvalhaes Aloi; Silveira, Ilson Carlos Almeida da; Amor, Cecília Cerda

doi:10.1016/b978-85-352-6208-7.50012-x

Cited by 10 publications

(8 citation statements)

References 26 publications

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“…This index corresponds to the average temperature of the ocean surface waters oceanward of the shelf break. This concept is an adaptation of the classical percentage water mass analysis reviewed by Castro Filho et al () for the study area. The T index for the rainy cruise period was 25.2°C and 22°C for the dry period cruise.…”

Section: Methodsmentioning

confidence: 99%

Seasonal variability of ichthyoneuston assemblage on the continental shelf and slope of the Southwest Atlantic Ocean, Brazil (20°–23°S)

et al. 2019

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Many marine organisms spend the early life history stages in neuston domain. Although the importance of ichthyoneuston, few studies were developed in the Southwest Atlantic Ocean. Therefore, this study aimed to improve the knowledge on ichthyoneuston of the Brazilian coast analyzing the vertical stratification and horizontal distribution of these organisms. Neuston samples were collected in daylight between 20°S and 23°S from February to April 2009 (late summer/early autumn; rainy season) and from August to September 2009 (late winter/early spring; dry season). Eggs of six taxa were identified: Anguilliformes, Engraulidae, Clupeidae, Synodontidae, Trichiuridae, and Maurolicus stehmanni (Sternoptychidae). The neustonic larval fish assemblage was composed by 40 families and 63 species. Mullidae and Myctophidae larvae were the most abundant in the rainy period while Mullidae and Mugilidae dominated in the dry season. Seasonal and spatial variation of larval fish assemblages in the neuston were structured by oceanographic features. The larval fish abundance on the outer slope stations may have been favored by the advection of an anticyclone that encompassed most of the study region during the cruise periods. In the rainy season, salinity and local depth structured the larval fish assemblage in a cross‐shelf gradient, while in the dry season the larval assemblage was structured around temperature and north‐south gradient. In the dry season, the cross‐shelf gradient was less pronounced mainly because of the low abundance and frequency of mesopelagic larvae. The low frequency and abundance of some species are probably related to the net avoidance of fish larvae during the day or dial vertical migration, as many species migrate to deeper layers during the day and ascend to neuston only at night. Nevertheless, the present study presented baseline information about the seasonal and spatial variation of the neustonic larval fish assemblage influenced by the oceanographic conditions in the Campos Basin. We recommend to additionally collect night samples to decrease larval escapement rates and to compare night versus day catches to further investigate the influence of daily migration in the neustonic larval fish in the area.

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Section: Methodsmentioning

confidence: 99%

Seasonal variability of ichthyoneuston assemblage on the continental shelf and slope of the Southwest Atlantic Ocean, Brazil (20°–23°S)

et al. 2019

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“…Estudos sobre as características oceanográficas (e.g., Caldas, 1978;Castro Filho, 1997) e sobre alguns grupos de organismos marinhos já foram realizados na área compreendida entre Cabo Frio (RJ) e Cabo de Santa Marta Grande (SC). A maioria dos trabalhos realizados tinha como grupo alvo os peixes (e.g., Nakatani, 1982;Sato, 1983;Ribeiro, 1996), sendo raros aqueles que analisaram grupos de organismos planctônicos (e.g., Soares, 1983 -fitoplâncton;Dias, 1994 -sifonóforos;Campos, 2000apendiculários).…”

Section: Introductionunclassified

Estudo faunístico e da distribuição das hidromedusas (Cnidaria, Hydrozoa) da região compreendida entre Cabo Frio (RJ) e Cabo de Santa Marta Grande (SC), Brasil

Tronolone¹

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Brazil has an extensive marine coast of over 9.200 km. However, the taxonomical, biogeographical and ecological knowledge of the organisms present in coastal and neritic waters is scanty. Although the gelatinous plankton constitutes one of the main groups of pelagic predators, is abundant and relatively large, in size, it is usually underestimated in number and importance by the traditional sampling methods. Hydrozoa are one of the most numerous and common groups in this planktonic community. Among the works on hydromedusae, only some included extensive areas of the Brazilian continental shelf, although sampling of oceanographic expeditions, as the ones accomplished by the Instituto Oceanográfico of the Universidade de São Paulo (IO-USP), are available for study. The goal of this study is to survey the hydromedusae species collected by two oceanographic expeditions by the Brazilian vessel carried out by IO-USP along the continental shelf between Cabo Frio (RJ) and Cabo de Santa Marta Grande (SC) (South Brazil Bight-SBB), in 1991 and 2001: Sardinha 1 and PADCT 2. The diversity and geographic distribution of the hydromedusae fauna were analyzed. Data were interpreted trying to infer correlations in the distribution of the species with the characteristic water masses present in the area (Coastal Water-CW; Tropical Water-TW; South Atlantic Central Water-SACW). The distribution data were also used in a Parsimony Analysis of Endemicity (PAE), to verify possible endemic areas of the species. From the 155 samples a total of 51,808 hydromedusae specimens were found, belonging to 20 species/morphotypes: 10 Anthoathecata; 5 Leptothecata; 3 Trachymedusae; 2 Narcomedusae. The diversity and abundance of the species were lower in the samples of PADCT 2 when compared to Sardinha 1. All of the species had already been recorded for the Brazilian coast; however, some had their geographical distributions enlarged. Liriope tetraphylla and Aglaura hemistoma were the most frequent and abundant species in the samples of the Sardinha 1 and PADCT 2, respectively. There are indications that the geographical distributions of some species are associated, as Aglaura hemistoma and Corymorpha gracilis; Solmundella bitentaculata and the pair Aglaura hemistoma-Liriope tetraphylla; Turritopsis nutricula and Proboscidactyla ornata, the last association usually occurring when both species are abundant. The relative low number of hydromedusae species found in SBB can be consequence of the sampling method, which did not aim at the gelatinous plankton. However, among the 20 identified species/morphotypes are the most frequent species already recorded for SBB, as Aglaura hemistoma, Liriope tetraphylla, Rhopalonema velatum, Solmundella bitentaculata and Turritopsis nutricula.. Some species distributions are associated to specific water masses like Turritopsis nutricula, Niobia dendrotentaculata, Proboscidactyla ornata, Solmundella bitentaculata and Corymorpha gracilis in a mixture of SACW and CW. Most individuals of Liriope tetraphylla and Eucheilota duo...

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“…A região de cabo Frio (RJ) consiste em uma área de transição em relação às características da plataforma continental. Ao norte de cabo Frio (região leste da costa brasileira) a plataforma continental é estreita e a massa de água predominante é a Água Tropical, enquanto que ao sul, na costa sudeste, a plataforma é larga e formada por massas de água que resultam da mistura entre a Água Tropical (AT), quente e salina (T>20 o C e S>36,40), a Água Central do Atlântico Sul (ACAS), relativamente fria (T<20 o C e S<36,40), e a Água Costeira (AC), resultante da mistura da água doce continental e água da plataforma continental (Emílsson, 1961;Mascarenhas et al, 1971;Miranda, 1982;Castro Filho, 1996). Nas proximidades do cabo Frio a plataforma continental tem, aproximadamente, 50 km de extensão.…”

Section: Descrição Da áRea De Estudounclassified

“…A hidrologia na região de cabo Frio depende diretamente de condições meteorológicas, sendo que o padrão de ventos é o principal responsável pela distribuição das massas de água. Segundo Castro (1996), durante o verão, os ventos predominantes são paralelos à costa e provenientes de NE. Este vento causa um transporte em direção ao mar aberto, e se o vento persistir, ocorre abaixamento do nível do mar na costa causando uma força de gradiente de pressão em direção à costa que, em equilíbrio geostrófico com a força de Coriolis, resulta em correntes geostróficas paralelas à costa no mesmo sentido do vento.…”

Section: Descrição Da áRea De Estudounclassified

"Variação espaço-temporal do ictioplâncton e condições oceanográficas na Região de Cabo Frio (RJ)"

Lopes¹

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AGRADECIMENTOS Primeiramente agradeço ao Prof. Dr Mario Katsuragawa, meu orientador desde a iniciação científica, por sempre acreditar em mim. Obrigada por sempre compreender e apoiar os seus alunos. À June, por milhares de ensinamentos ao longo destes anos, principalmente quando era do laboratório. Por ter sido uma amiga especial nos momentos que eu mais precisei! Gostaria aqui de fazer uma homenagem especial à uma pessoa que me ensinou muito na época de estágio, que foi um exemplo de profissional e, infelizmente, não está mais conosco, Prof. Matsuura! À Suzuki por também fazer parte da minha formação científica, pelos conselhos, conversas e muito conhecimento transmitido na parte de identificação. Lourdes, você além de cumprir seu trabalho como técnica do laboratório, consegue ser amiga, irmã, mãe, conselheira e companheira, tudo ao mesmo tempo!! Você é realmente maravilhosa. Sem a sua ajuda este trabalho não seria o mesmo!! Se eu citasse aqui tudo que você me ajudou neste trabalho, a tese viraria um apêndice! À todas as pessoas que me ensinaram durante o convívio nos Laboratórios de

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Correntes E Massas De Água Na Plataforma Continental

Cited by 10 publications

References 26 publications

Seasonal variability of ichthyoneuston assemblage on the continental shelf and slope of the Southwest Atlantic Ocean, Brazil (20°–23°S)

Seasonal variability of ichthyoneuston assemblage on the continental shelf and slope of the Southwest Atlantic Ocean, Brazil (20°–23°S)

Estudo faunístico e da distribuição das hidromedusas (Cnidaria, Hydrozoa) da região compreendida entre Cabo Frio (RJ) e Cabo de Santa Marta Grande (SC), Brasil

"Variação espaço-temporal do ictioplâncton e condições oceanográficas na Região de Cabo Frio (RJ)"

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