SciELO - Scientific Electronic Library Online

 
vol.35 número2Constituyentes químicos de Eisenia arbórea Areschoug de Baja California Sur, MéxicoDesempeño económico de áreas de manejo de recursos bentónicos en la región del Bío-Bío índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Investigaciones marinas

versão On-line ISSN 0717-7178

Resumo

PALMA, Sergio; APABLAZA, Pedro  e  SOTO, Daniela. Diversity and aggregation areas of planktonic cnidarians of the southern channels of Chile (Boca del Guafo to Pulluche Channel). Investig. mar. [online]. 2007, vol.35, n.2, pp.71-82. ISSN 0717-7178.  http://dx.doi.org/10.4067/S0717-71782007000200008.

We identified 36 species of cnidarians (27 hydromedusae, 9 siphonophores) collected from the Moraleda, King, Darwin, and Pulluche channels, located in southern Chile. The hydromedusae Gossea brachymera, Hybocodon unicus, and Sarsia coccometra, and the siphonophores Rosacea cymbiformis and R. plicata were recorded for the first time in the southern channels. Diversity values were higher for Hydromedusae (2.66 bits) than for Siphonophorae (1.15 bits). The largest aggregates were found in the Moraleda and Pulluche channels, with densities that exceeded 7,000 ind-1000 m-3. The vertical distribution of the dominant species showed Solmundella bitentaculata to be located near the surface (0-20 m), whereas Sphaeronectes gracilis, Muggiaea atlántica, Clytia simplex, and Proboscidactyla ornata were found in subsurface waters (20-50 m) and Amphogona apicata in deeper waters (50-100 m). According to the Pearson analysis, salinity correlated positively with S. gracilis and S. bitentaculata and negatively with P. ornata. C. simplex was indirectly associated with temperature and the dissolved oxygen concentration

Palavras-chave : cnidarians; gelatinous zooplankton; distribution; diversity; southern channels.

        · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons