2020-02-132020-02-132019-07-11MENDES, Haresson Elias Pampolha de Siqueira. Avaliação da Biomassa e Produção secundária das apendiculárias (UROCHORDATA:APPENDICULARIA) na plataforma continental amazônica. Orientador: José Eduardo Martinelli Filho. 2019. 36 f. Trabalho de Curso (Bacharelado em Oceanografia) - Faculdade de Oceanografia, Instituto de Geociências, Universidade Federal do Pará, Belém, 2019. Disponível em: https://bdm.ufpa.br:8443/jspui/handle/prefix/2922. Acesso em:.https://bdm.ufpa.br/handle/prefix/2922Appendicularians are cordate invertebrates belonging to the Appendicularia class and are widely distributed on the world’s marine and estuarine zooplankton. Its body is divided in two parts: the trunk and the tail and they produce a gelatinous house which is capable of filtering a large spectra of particle sizes available at the pelagic ecosystem. The objective os this study was to analyze the influence of environmental parameters over the appendicularian community subjected to the high variability of the Amazon Continental Shelf (ACS). Sampling was perfomed over a transect perpendicular to the shelf during both rainy (March) and dry (October) seasons, 2018 with a total of 29 sampling stations. Appendicularians were collected by oblique tows using conical plankton nets (200μm) coupled to a mechanical flowmeter. Temperature and salinity were measurde by a multiparameter sensor, while clorophyll-a concentration was calculated by spectometry. Species composition, density, frequency of occurrence, biomass, growth rates and secondary production were calculated for the appendicularians assembly. A total of 11 species were found and Oikopleura dioica was the most representative for density, biomass and secondary production during both periods. Salinity was the main variable related to the river plume area of influence and can observe an icreasing distribution pattern in terms of density, biomass and secondary production probably related by the river plume. Growth rates were about two times smaller than observed for the southeastern Brazilia coast, possibly due to the high temperatures at the ACS.It was observed that species distribution may be closely related to its adaptation to sanily variation caused by hydrological conditions directly affecting the biomass and secondary production. Seasonality had a expressive influence over the appendicularian community at the ACS, mainly drived by the river plume movement trhough time and the salinity as the main factor on the distribution and occurrence of the species.Acesso AbertoZooplânctonAppendiculariaPluma estuarinaCNPQ::CIENCIAS EXATAS E DA TERRA::OCEANOGRAFIA::OCEANOGRAFIA BIOLOGICATrabalho de Curso - Graduação - Monografia