Considerações em tôrno das hydromedusae da região de Fernando de Noronha

Vannucci, M.

doi:10.1590/s0373-55241958000100001

Cited by 5 publications

(3 citation statements)

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“…Although relatively common, the trophic impact of these hydroids is low since their densities were low. In combination with information from the literature, we conclude that hydroids suspended in the water column are of widespread occurrence in shelf waters of the South-west Atlantic (and probably also worldwide), encompassing tropical (Vannucci, 1955, 1958), subtropical (this study) and temperate areas (Genzano et al , 2008).…”

Section: Discussionsupporting

confidence: 74%

“…The hydroid fauna of the South-west Atlantic is relatively well known (Genzano et al , 2009; Haddad & Marques, 2009), with more than 150 species recorded from Brazil as of early this century (Migotto et al , 2002). Nevertheless, occurrences of hydroids in the pelagic environment are mostly anecdotal, with records of Obelia longissima (Pallas, 1766) and Amphisbetia operculata (Linnaeus, 1758) from Argentina (Genzano et al , 2008), several species from north-eastern and south-eastern Brazil (Vannucci, 1957, 1958, 1963), including ‘polyps of Hydrozoa’ (Resgalla, 2001; Veado & Resgalla, 2005; Resgalla et al , 2008) and Clytia spp. (Nagata et al , 2014; Nogueira Júnior et al , 2014) from southern Brazil.…”

Section: Introductionmentioning

confidence: 99%

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Are free-floating planktonic hydroids (Cnidaria, Hydrozoa) common components of the pelagic fauna from the South Brazilian Bight?

et al. 2015

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We analysed 267 zooplankton samples collected in the South Brazilian Bight (SBB; 23–27°S) to determine whether hydroids, typically benthic, are common components of the pelagic SBB. Two species, Clytia arborescens, recorded for the first time in the Atlantic Ocean, and Clytia sp. were identified. While these planktonic hydroids were frequent or relatively so in shallow shelf waters (~23% of the samples <50 m isobaths, and 5% of the samples >100 m), abundances were low (up to 61 hydranths m−3) suggesting a low trophic impact. Such colonies are probably fragments of benthic colonies detached by storms and/or tides. Given the good condition of the coenosarc, existence of gastric content, and presence of reproductive structures, development of these species appears to be normal in the pelagic environment. Existence in the plankton may increase their capacity for dispersion.

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Section: Discussionsupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Are free-floating planktonic hydroids (Cnidaria, Hydrozoa) common components of the pelagic fauna from the South Brazilian Bight?

et al. 2015

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“…No âmbito da pesquisa científica o seu maior desenvolvimento ocorreu a partir das décadas de 50 e 60, com os trabalhos publicados por VANNUCCI & HOSOE (1952), VANNUCCI (1958VANNUCCI ( , 1962, ALMEIDA PRADO (1961), BJÖRNBERG (1963), PARANAGUÁ (1966PARANAGUÁ ( , 1970, entre outros. Apesar da existência de grande quantidade de documentação sobre o zooplâncton no mundo, ainda é escassa bibliografia para a região oceânica nordestina.…”

Section: Ustacea) Ustacea) Ustacea) Ustacea)unclassified

Macrozooplâncton da Zona Econômica Exclusiva do Nordeste do Brasil (segunda expedição oceanográfica - REVIZEE/NE II) com ênfase em Copepoda (Crustacea)

Cavalcanti

Larrazábal

2004

Rev. Bras. Zool.

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. ustacea). ustacea). ustacea). ustacea). The present study was performed with the objective to characterise the density, relative abundance, frequency of occurrence, specific diversity and species associations of the oceanic macrozooplankton of the "Exclusive Economic Zone". The area under investigation is located between 7º28'56"S -34º32'45"W and 3º21'08"S -38º40'29"W, sampled during the second oceanographic expedition REVIZEE/NE on board OV Antares of the Brazilian Navy. Twenty-one samples were taken with bongo type plankton net with 300µm mesh size between 0 and 200 m depth. 63 (sixty and three) taxa were identified. Total density varied from 2,31 to 6,06 ind.m -3 (station 55 and 56) for the whole community and from 0,99 to 4,75 ind.m -3 (station 48 and 57) for Copepoda. Regarding frequency of occurrence, Crustacea and Chaetognatha were very frequent, Cnidaria and Teleostei were frequent, Mollusca, Annelida, and Chordata were less frequent, and Protozoa occurred rarely. Specific diversity varied from 0,648 to 4,037 bits.ind -1 , and the equitability from 0,279 to 1,0. Diversity and equitability were low due to the dominance of Undinula vulgaris (Dana, 1849) e Calanopia americana F. Dahl, 1894. Cophenetic analysis revealed a r < 0,8, showing that there were no distinct groups of copepods in the region. The dominant copepod species was Undinula vulgaris, occurring at all stations. The meroplankton was represented mainly by decapod crustacean larvae and fish eggs and larvae, but was less important than the holoplankton community. KEY WORDS. Biodiversity, oceanic Copepoda.RESUMO. Objetivando-se caracterizar a densidade, abundância relativa, freqüência de ocorrência, diversidade específica e associação de espécies do macrozooplâncton oceânico da "Zona Econômica Exclusiva" foi realizado o presente estudo. A região prospectada encontra-se localizada entre os paralelos 7º28'56"S -34º32'45"W, referente a segunda expedição oceanográfica do Programa REVIZEE/NE, realizada pelo Noc. Antares da DHN/ Marinha do Brasil. As amostras foram coletadas com rede de plâncton tipo bongo com malha de 300 e 500µm, no período de 31/01 a 07/02/97 em 21 estações, totalizando 42 amostras. Foram identificados 78 taxa. A densidade total dos organismos (exceto Copepoda) variou de 2,31 a 6,06 org.m -3 (estações 55 e 56) e, para os Copepoda de 0,99 a 4,75 org.m -3 (estações 48 e 57). Em termos de freqüência de ocorrência Crustacea e Chaetognatha foram muito freqüentes; Cnidaria e Teleostei (ovos e larvas) freqüentes; Mollusca, Annelida e Chordata pouco freqüentes e Protozoa raros. A diversidade específica variou de 0,648 a 4,037 ind.bits -1 . A equitabilidade variou de 0,279 a 1,0. Os baixos valores de diversidade e equitabilidade ocorreram devido à dominância de Undinula vulgaris (Dana, 1849) e Calanopia americana F. Dahl, 1894. A análise cofenética revelou um r < 0,8, demonstrando não haver grupos diferentes de Copepoda na região. A espécie de Copepoda dominante foi Undinula vulgaris, ocorrendo em todas as estações independente da malha col...

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Zoo- and Ichthyoplankton Communities of Pelagic Ecosystems in the Western Tropical Atlantic

Schwamborn

Neumann‐Leitão²,

Lira³

et al. 2023

The Latin American Studies Book Series

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Considerações em tôrno das hydromedusae da região de Fernando de Noronha

Cited by 5 publications

References 1 publication

Are free-floating planktonic hydroids (Cnidaria, Hydrozoa) common components of the pelagic fauna from the South Brazilian Bight?

Are free-floating planktonic hydroids (Cnidaria, Hydrozoa) common components of the pelagic fauna from the South Brazilian Bight?

Macrozooplâncton da Zona Econômica Exclusiva do Nordeste do Brasil (segunda expedição oceanográfica - REVIZEE/NE II) com ênfase em Copepoda (Crustacea)

Zoo- and Ichthyoplankton Communities of Pelagic Ecosystems in the Western Tropical Atlantic

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