Notes on feeding of Chaetognatha in Guanabara Bay, Brazil

Marazzo, Andrea; Machado, C.F.; Nogueira, Carlos Sherman Regis

doi:10.1093/plankt/19.7.819

Cited by 22 publications

(12 citation statements)

References 20 publications

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“…3 show the importance of frequent sampling in order to discover peaks in feeding intensity and in estimating the mean NPC for the two 24 h periods. The enhanced feeding of Sagitta enflata at night is consistent with results from Hawaii (Szyper 1978, Kimmerer 1984 and Guanabara Bay, Brazil (Marazzo et al 1997), although Terazaki (1996) found that the proportion of S. enflata with food in the gut increased during the night until noon in the Central Equatorial Pacific.…”

Section: Feedingsupporting

confidence: 79%

Diel feeding of the chaetognath Sagitta enflata in the Zanzibar Channel, western Indian Ocean

Øresland¹

2000

Mar. Ecol. Prog. Ser.

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ABSTRACT:The d~e l feeding cycle of Sagitta enflata, the dominant chaetognath in the Indian Ocean, was investigated, using gut content analyses, between the monsoon periods on 2 occasions, October 1995 and May 1996. Zooplankton samples were collected every second hour during a 24 h period close to a dnfting buoy in the middle of the Zanzibar Channel. S. enflata made up 64 % (October) and 77 % (May) of all chaetognaths in this study. S enflata and all chaetognaths contributed as much as 30 and 33%,, respectively, of the total 90 pm net zooplankton wet weight in October (May samples could not be weighed due to occurrence of phytoplankton). S. enflata fed most actively at night. Small copepods with a mandible width

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Section: Feedingsupporting

confidence: 79%

Diel feeding of the chaetognath Sagitta enflata in the Zanzibar Channel, western Indian Ocean

Øresland¹

2000

Mar. Ecol. Prog. Ser.

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“…Sua dieta consiste, principalmente, de Copepoda, tendo considerável influência na estrutura dos níveis tróficos mais baixos (PEARRE 1980). MARAZZO et al (1997) também observaram este fato ao analisar os Chaetognatha coletados na baía de Guanabara, Rio de Janeiro, Brasil.…”

Section: Discussionunclassified

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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“…Esses resultados foram confirmados por Resgalla & Montú (1995) ). S. hispida tem sido registrada na plataforma continental do nordeste do Brasil (Gusmão, 2000), do sudeste (Almeida Prado, 1961a;b;1968;Liang & VegaPérez, 1994;Marazzo et al, 1997) e do sul (Resgalla & Montú,1995).…”

Section: Resultsunclassified

Distribuição das espécies de chaetognatha na plataforma continental de Sergipe e Alagoas

Araujo

Ribeiro

2005

Braz. J. Aquat. Sci. Technol.

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June (2002 and 2003), corresponding to the dry and rainy seasons, respectively. Oblique hauls were done with plankton net, mesh size 200 µm. Temperature, salinity, pH, dissolved oxygen and nutrients were measured in three levels of the water column. Subsamples were taken using a Stempel pippette. Correlations analysis between Chaetognatha distribution and environmental parameters were studied using canonical correspondence analysis. Sagitta tenuis and S. enflata were the most adundant species, following by S. hispida, Sagitta spp., Krohnitta pacifica, Pterosagitta draco and S. bipunctata. Density values ranged between 9 ind.m -3 , in December 2002, and 4,473 ind.m -3 in June 2002, when Sagitta tenuis and S. enflata were more abundant. Density average values decreased from stations located at 10 meters to that located at 30 meters depth. Temperature, phosphate, salinity and water transparence were correlated (p<0,05) to the Chaetognatha species distribution.

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Notes on feeding of Chaetognatha in Guanabara Bay, Brazil

Cited by 22 publications

References 20 publications

Diel feeding of the chaetognath Sagitta enflata in the Zanzibar Channel, western Indian Ocean

Diel feeding of the chaetognath Sagitta enflata in the Zanzibar Channel, western Indian Ocean

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

Distribuição das espécies de chaetognatha na plataforma continental de Sergipe e Alagoas

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