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Spatial and seasonal distribution of Olivella minuta (LINK,1807)(Mollusca, Gastropoda, Olividae) at Baraqueçaba Beach,São Paulo-SP

Grant number: 10/13589-4
Support type:Scholarships in Brazil - Master
Effective date (Start): March 01, 2011
Effective date (End): August 31, 2012
Field of knowledge:Physical Sciences and Mathematics - Oceanography - Biological Oceanography
Principal researcher:Alexander Turra
Grantee:Daniel Teixeira Tardelli
Home Institution: Instituto Oceanográfico (IO). Universidade de São Paulo (USP). São Paulo , SP, Brazil


The gastropods are one of the most conspicuous groups found in protected sand beaches. However, information on this group in the Brazillian Coast, as well as throughout the world, are scarce and refer mainly to ocurrence, morphology and systematics. The Neogastropoda Olivella minuta is common and abundant in protected beaches from the northern coast of São Saulo, as observed on Baraqueçada beach. Important gaps in knowledge on this species refer to its spatial and temporal distribution. Thus, this paper aims to establish a pattern of Olivella minuta's zonation along the shore of Baraqueçaba beach, the factors which influence this distribution and O. minuta abundance through time. The sample area also includes the subtidal region, which is rarely taken into account in macrofauna distribution studies in beaches. In order to study the zonation of O. minuta seasonal collections will take place. In the backshore and foreshore random samples (0,5 x 0,5 x 0,10 m) will be obtained at every 5 metres of the beache's profile. In the nearshore, 20 samples will be obtained at every 100 metres starting from the beach and making use of an airlift (6'' of diameter) until the species ceases to appear. In order to study the distribution along the beach and the influence of biotic and abiotic factors, twelve sample stations will be established within the intertidal region, each composed of five transects randomly distributed perpendicular to the water line, the data obtained will also be used to study the seasonal variation of the species. All the material, after being washed, will be kept in alcohol 70% and taken for counting and identification in the lab. Information regarding the profile and granule size will be obtained as well and related to the abundance of O.minuta. The seasonal variation will be based on monthly samples carried out throughout an annual cicle.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PETRACCO, MARCELO; CAMARGO, RITA MONTEIRO; TARDELLI, DANIEL TEIXEIRA; TURRA, ALEXANDER. Population biology of the gastropod Olivella minuta (Gastropoda, Olividae) on two sheltered beaches in southeastern Brazil. ESTUARINE COASTAL AND SHELF SCIENCE, v. 150, n. A, SI, p. 149-156, OCT 5 2014. Web of Science Citations: 11.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
TARDELLI, Daniel Teixeira. Spatial and temporal distribution of Olivella minuta (LINK, 1807) (Mollusca, Gastropoda, Olividae) Barequeçaba Beach, North Coast of São Paulo. 2013. Master's Dissertation - Universidade de São Paulo (USP). Instituto Oceanográfico São Paulo.

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