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Genetic diversity and connectivity of Flaccisagitta enflata (Chaetognatha: Sagittidae) in the tropical Atlantic ocean (northeastern Brazil) ArchiMer
Melo, Danielle C. M.; Lira, Simone M. A.; Moreira, Ana Paula B.; Freitas, Lucas; Lima, Camilla A. D.; Thompson, Fabiano; Bertrand, Arnaud; Silva, Alex C.; Neumann-leitão, Sigrid.
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...
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Ano: 2020 URL: https://archimer.ifremer.fr/doc/00630/74173/73744.pdf
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First report of deep-sea copepod Megacalanus princeps Wolfenden, 1904 (Calanoidea: Megacalanidae) from southwestern Atlantic ArchiMer
De Almeida Alves-júnior, Flavio; Correia, Érika Pinho; Pereira Figueirêdo, Lucas Guedes; Cunha, Aislan Galdino Da; Bertrand, Arnaud; Neumann-leitão, Sigrid.
The deep-sea copepod Megacalanus princeps Wolfenden, 1904 was previously recorded from the northern and southeastern Atlantic, Indian and Pacific oceans, but not previously observed from southwestern Atlantic. Here we report its first occurrence in Brazilian waters. The current record increases the knowledge on the species distribution and on the deep-sea copepod fauna in the south Atlantic.
Tipo: Text Palavras-chave: Geographic distribution; Mesopelagic; Northeastern Brazil; Calanoida.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00384/49556/50050.pdf
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Proposal of a trophic relationship between Chaetognatha and Cnidaria based on Mitochondrial COI sequences ArchiMer
Da Mota Melo, Danielle Caroline; Costa Brandao, Manoela; De Albuquerque, Simone Maria; Neumann-leitão, Sigrid.
This is the first study in Brazil to propose a trophic relationship between Chaetognatha and Cnidaria based on molecular data (COI gene - DNA barcode). Cnidaria COI sequences were detected in tissue samples from two specimens of Flaccisagitta enflata collected in the surroundings of Fernando de Noronha archipelago, Tropical Western Atlantic. The methodology used followed all the requirements for a safe molecular manipulation, making the possibility of contamination unlikely. A search carried in BLAST showed that both sequences provided here presented a combination of highest query coverage and match identity with Nemopilema nomurai (Cnidaria: Scyphozoa), supporting the hypothesis that they belong to a species of jellyfish. Since gelatinous taxa are known...
Tipo: Text Palavras-chave: DNA barcode; Food item; Oceanic island; Tropical Atlantic; Zooplankton; Cytochrome oxidase subunit I gene.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00628/74057/73490.pdf
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First record of Cirrholovenia polynema (Hydrozoa: Leptothecata) in the Western Atlantic Ocean ArchiMer
Tosetto, Everton Giachini; Neumann-leitão, Sigrid; Bertrand, Arnaud; Nogueira Júnior, Miodeli.
Tipo: Text
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00689/80071/83091.pdf
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