Resultados científicos do cruzeiro do "Baependi" e do "Vega" à Ilha da Trindade: Chaetognatha

Vannucci, M.; Hosoe, K.

doi:10.1590/s0373-55241952000100002

Cited by 10 publications

(2 citation statements)

References 22 publications

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“…Among the cosmopolitan species of Chaetognatha, Flaccisagitta enflata (Grassi, 1881) was selected as model for this study due to its extensive horizontal distribution and high abundance in marine plankton. This species can reach lengths of up to 25 mm in the adult stage and presents a typical occurrence in epipelagic waters of the tropical and subtropical regions throughout the world [2,[13][14][15], including neritic and oceanic areas of northeastern Brazil, where it is usually the most abundant species of the phylum [16][17][18]. Its distribution based on conventional taxonomic identification is, therefore, well documented in the literature.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and connectivity of Flaccisagitta enflata (Chaetognatha: Sagittidae) in the tropical Atlantic ocean (northeastern Brazil)

Melo¹,

Lira²,

Moreira³

et al. 2020

PLoS ONE

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The phylogeography of the holoplanktonic chaetognath Flaccisagitta enflata was investigated in the Tropical Western Atlantic (TWA). Considering the cosmopolitan range of this species and the fact that its entire life cycle is planktonic, the central hypothesis of this study is that F. enflata exhibits connectivity due to its high dispersal capacity, forming a panmictic population among the study sites. The evaluated areas included neritic (Port of Recife-PR, and Tamandaré-TA) and oceanic (Fernando de Noronha Archipelago-FN, Rocas Atoll-RA, Guará seamount-GS and Saint Peter and Saint Paul's Archipelago-SPSPA) locations of the Brazilian Blue Amazon. We used COI gene sequences as molecular marker. Partial sequences (425 bp) were obtained for 116 specimens and employed to reconstruct the phylogeny, build an haplotype network, evaluate gene flow through a migration model, and estimate diversity indices, population structuring and demographic history. High levels of haplotype diversity (mean: 0.98) and moderate to high levels of nucleotide diversity (mean: 0.023) were observed. The phylogeny and the haplotype network topologies showed some geographic clustering, indicating local structuring in GS and PR. This finding was supported by the AMOVA high global Φst (0.033, significant) and some pairwise Φst comparisons (7 out of 15 were significantly >0). Significant differences suggested lower levels of connectivity when GS population was compared to those of FN and SPSPA; as well as when TA was compared to FN. These results might be related to particularities of the oceanic dynamics which rules the TWA, sustaining such dissimilarities. Structuring was also observed between PR and all oceanic locations. We hypothesize that the topography of the port inlet, enclosured by a reef barrier, may constrain the water turnover ratio and thus migration rates of F. enflata in the TWA. Accordingly, Migrate-N yielded a four

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Section: Introductionmentioning

confidence: 99%

Genetic diversity and connectivity of Flaccisagitta enflata (Chaetognatha: Sagittidae) in the tropical Atlantic ocean (northeastern Brazil)

Melo¹,

Lira²,

Moreira³

et al. 2020

PLoS ONE

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“…Registros prévios no Brasil: Trindade (RJ), São João da Barra (RJ) e Cabo Frio (RJ) (Vannucci, 1950); costa de São Paulo de Paraná (Vannucci, 1954); São Sebastião (SP) (Migotto & Silveira, 1987;Silveira & Migotto, 1991;; Fernando de…”

Section: Família Pennariidaeunclassified

Comunidades de hidrozoários (Cnidaria) estuarinos do sudeste e sul do Brasil

Bardi¹

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Overview of the History of Biological Oceanography in the Southwestern Atlantic, with Emphasis on Plankton

Boltovskoy

Valentin

2018

Plankton Ecology of the Southwestern Atlantic

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Resultados científicos do cruzeiro do "Baependi" e do "Vega" à Ilha da Trindade: Chaetognatha

Cited by 10 publications

References 22 publications

Genetic diversity and connectivity of Flaccisagitta enflata (Chaetognatha: Sagittidae) in the tropical Atlantic ocean (northeastern Brazil)

Genetic diversity and connectivity of Flaccisagitta enflata (Chaetognatha: Sagittidae) in the tropical Atlantic ocean (northeastern Brazil)

Comunidades de hidrozoários (Cnidaria) estuarinos do sudeste e sul do Brasil

Overview of the History of Biological Oceanography in the Southwestern Atlantic, with Emphasis on Plankton

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