Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Marazzo, A.
Right arrow Articles by Nogueira, C.S.R.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Marazzo, A.
Right arrow Articles by Nogueira, C.S.R.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

JOURNAL OF PLANKTON RESEARCH | VOLUME 19 | NUMBER 7 | PAGES 819-828 | 1997
© Oxford University Press

research-article

Notes on feeding of Chaetognatha in Guanabara Bay, Brazil

A. Marazzo, C.F. Machado and C.S.R. Nogueira

Laborarório de Zooplâncton, Departamento de Biologw Marinha, Instituto de Biologia da Universidade Federal do Rio de Janeiro, Av. Brigadeiro Trompowsky, s/n, Cidade Universitária 111w do Fundao, CCS, Bloco A, Rio de Janeiro, RJ, Brasil CEP: 21949–900

Received on October 5, 1996; accepted on February 3, 1997 A preliminary analysis, by means of the gut content, of the diet of Sagitta friderici and Sagitta enflata occurring in Guanabara Bay was carried out. The samples were collected at different times over a 4day period in September 1995, during vertical tows with a conical net of 200 µm mesh size at a fixed station (30 m depth). In total, 1000 individuals were examined. Copepoda were the numerically dominant group of prey of S.friderici and S.enflata (67.2 and 74.6%, respectively); both species behave as opportunistic carnivores, feeding mainly on the more abundant copepod species throughout the water column. Adult individuals of S.fnderici and S.enflata (stages III and IV) seem to have food requirements different from juveniles: adults fed on other items (chaetognaths, crus tacean larvae, hydromedusae and luciferidae), and the food containing ratio (FCR) was higher in indi viduals of stage Ill. In general, only one prey per gut was registered. Chaetognaths may have chosen their prey in relation to their size, since the size of the prey was proportional to the size of their predators. Feeding intensity (NPC) was higher in individuals collected during the night periods.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 J PLANKTON RESHome page
R. Schwamborn, S. L. C. Bonecker, I. B. Galvao, T. A. Silva, and S. Neumann-Leitao
Mesozooplankton grazing under conditions of extreme eutrophication in Guanabara Bay, Brazil
J. Plankton Res., September 1, 2004; 26(9): 983 - 992.
[Abstract] [Full Text] [PDF]

Home page
 J PLANKTON RESHome page
R. Giesecke and H. E. Gonzalez
Feeding of Sagitta enflata and vertical distribution of chaetognaths in relation to low oxygen concentrations
J. Plankton Res., April 1, 2004; 26(4): 475 - 486.
[Abstract] [Full Text] [PDF]


Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.