| Full text | |
| Author(s): |
Elizabeti Y. Muto
[1]
;
Thaïs Navajas Corbisier
[2]
;
Leandro Inoe Coelho
[1]
;
Lidia Paes Leme Arantes
[1]
;
André Chalom
[5]
;
Lucy Satiko Hashimoto Soares
[1]
Total Authors: 6
|
| Affiliation: | [1] Univ Sao Paulo, Inst Oceanog, BR-05508120 Sao Paulo - Brazil
[2] Universidade de São Paulo. Instituto Oceanográfico - Brasil
[3] Universidade de São Paulo. Instituto de Matemática e Estatística - Brasil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Brazilian Journal of Oceanography; v. 62, n. 2, p. 89-102, 2014-07-00. |
| Abstract | |
The temporal and spatial variations of feeding habits and trophic groups of demersal fish species of Santos Bay and the adjacent continental shelf were investigated. The samples were taken in September 2005 and March 2006 by bottom otter trawling. The stomach content analysis of 2,328 specimens of 49 species showed most fish fed on a large range of food items but relied heavily on shrimp, crabs/swimming-crabs, amphipods, mysids, polychaetes, ophiuroids, squids, and teleosteans. The species were classified into ten trophic groups. Shrimp were an important food source in the Santos bay and inner shelf, while ophiuroids were important prey for predators of the middle shelf. Many species relied on crabs/swimming-crabs during the summer, especially on the middle shelf. The spatial and temporal variability in food resource utilization by fish were related to the pattern of distribution and abundance of their prey. The predation on shrimp and crabs/swimming-crabs seems to be related to the water mass dynamics of the region. Intraspecific comparisons demonstrated that most of the species display spatial and/or temporal variation in their diet. The demersal ichtyofauna can also be divided into the more general categories of piscivores, nektonic invertebrate feeders, benthic invertebrate feeders and planktonic invertebrate feeders. (AU) | |
| FAPESP's process: | 03/09932-1 - Influence of the estuarine complex of the Baixada Santista on the ecosystem of the adjacent platform (ECOSAN) |
| Grantee: | Ana Maria Setubal Pires-Vanin |
| Support Opportunities: | PRONEX Research - Thematic Grants |