| Registro completo |
| Provedor de dados: |
5
|
| País: |
France
|
| Título: |
Preliminary biological characterization of the Saldanha hydrothermal field at the Mid-Atlantic Ridge (36 degrees 34 ' N, 32 degrees 26 ' W, 2200 m)
|
| Autores: |
Biscoito, M
Almeida, A
Segonzac, Michel
|
| Data: |
2006-12
|
| Ano: |
2006
|
| Palavras-chave: |
New records
Antimora
Acanthonus
Fish
Sponge
Bathyal megafauna
Gastropoda
Fauna assemblage
Mid Atlantic Ridge
Hydrothermal vents
|
| Resumo: |
A preliminary description of the biology of the Saldanha hydrothermal field in the Mid-Atlantic Ridge (36 degrees 34'N, 32 degrees 26'W, 2200 m) is given, based on direct observation, video images and samples. Venting occurs mainly in a diffuse way through sediment, but hydrothermal fluid discharges are visible through centimeter-long orifices, scattered on the sediment, over an area of approximately 400 m(2), at depths between 2,200 and 2,220 metres. Emitted fluids are transparent, with a temperature of 7-9 degrees C. An almost complete absence of macro- and megafauna around the venting orifices was found. The only vent invertebrate identified was the gastropod Phymorhynchus sp., with only two juvenile specimens caught. A careful examination of the images taken at these orifices showed bacteria-like filaments undulating with fluid discharge. At the level of the benthic bathyal megafauna the dominant species seemed to be the sponge Cinachyra sp. (Demospongiae, Spirophorida, Tetillidae). At least 4 species of fish are new records from the area.
|
| Tipo: |
Text
|
| Idioma: |
Inglês
|
| Identificador: |
http://archimer.ifremer.fr/doc/2006/publication-3610.pdf
|
| Editor: |
Station Biologique de Roscoff
|
| Relação: |
http://archimer.ifremer.fr/doc/00000/3610/
|
| Formato: |
application/pdf
|
| Fonte: |
Cahiers de Biologie Marine (0007-9723) (Station Biologique de Roscoff), 2006-12 , Vol. 47 , N. 4 , P. 421-427
|
| Direitos: |
2006 Station Biologique de Roscoff
|
|
