Submitted by Alberto Vieira (martins_vieira@ibest.com.br) on 2017-09-19T17:36:51Z No. of bitstreams: 1 200931.pdf: 30352738 bytes, checksum: 3e673fd17dd59d25c095e8647d8e9158 (MD5) / Made available in DSpace on 2017-09-19T17:36:51Z (GMT). No. of bitstreams: 1 200931.pdf: 30352738 bytes, checksum: 3e673fd17dd59d25c095e8647d8e9158 (MD5) Previous issue date: 1983 / CAPES / Foram realizadas 63 estações oceanográficas durante a “Operação Rio de Janeiro I” e coletadas amostras de plancton em arrastos horizontais, verticais e oblíquos. Estudou-se a classe Thaliacea, sendo identificadas 6 espécies num total de 17.928 indivíduos pertencentes às famílias: Salpidae (Salpa fusiformis, Thalia democratica, T. cicar), Doliolidae (Doliolum nationalis Doliolum gegenbauri) e Pyrosomatidae (Pyrosoma atlanticum) Foram observadas as diversas fases do ciclo de vida das espécies, sendo descrito pela primeira vez para nossas águas, a forma jovem da colônia de Pyrosoma atlanticum. E discutida ainda a separação de Thalia democratica e Thalia cicar. Os resultados obtidos da distribuição horizontal do "Standing-stock" (org/100m3) dos Thaliacea, são comparados com os parâmetros temperatura e salinidade. / Plankton was sampled at 63 station's during “Operação Rio de Janeiro I” in horizontal, vertical and oblique plankton hauls. The class Thaliacea was studied through the ohservation of 17.928 organims divided in 6 species: Salpa fusiformis, Thalia democratica, T. cicar, Doliolum nationalis Doliolum gegenbauri and Pyrosoma atlanticum. Various fases of life cycle of these species were observed and for the first time in brazilian coast water a young colonie of Pyrosoma atlanticum was appointed. The Thalia democratica and Thalia cicar separation was discussed. The resultd obtained through the horizontal distribution of the "Standing-stock" (org/100m3) of Thaliacea were compared wiht plankton biovolume and correlated with temperature and salinity data.