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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Full stomachs at empty tides: tidal cycle affects feeding activity and diet of the sandy beach gastropod Olivella minuta

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Checon, Helio H. [1, 2] ; Silva, Mariana O. [1, 3] ; Corte, Guilherme N. [1, 2] ; Yokoyama, Leonardo Q. [4] ; Teodosio, M. Alexandra [3] ; Turra, Alexander [1]
Total Authors: 6
[1] Univ Sao Paulo, Inst Oceanog, Praca Oceanog 191, BR-05508120 Sao Paulo - Brazil
[2] Univ Esladual Campinas, Dept Biol Anim, Rua Monteiro Lobato 255, BR-13083862 Campinas, SP - Brazil
[3] Univ Algarve, FCT, CCMAR, Campus Gambelas, P-8005139 Faro - Portugal
[4] Univ Fed Sao Paulo, Lab Ecol & Gestao Costeira, Inst Mar, Rua Carvalho de Mendonca 144, BR-14411070 Santos, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Journal of Molluscan Studies; v. 86, n. 3, p. 219-227, AUG 2020.
Web of Science Citations: 1

Olivella minuta is an abundant neogastropod on sandy beaches from Texas (USA) to southern Brazil. This study aimed to characterize and compare the feeding activity and diet of a Brazilian population of O. minuta in different tidal zones (intertidal and subtidall, and different tidal levels (high and low tides), with three combinations of tidal zone and level being studied (intertidal during low tide, intertidal during high tide and subtidal). The results showed that diet composition was generally similar among tidal conditions, with O. minuta being a generalist, feeding on 45 different food items. Feeding activity, however, was higher in the intertidal during low tide, whereas the richness and diversity of food items were higher in the intertidal during high tide. The higher feeding activity of O. minuta during low tide may be linked to a lower risk of predation; at low tide organisms may be able to feed for a longer time, arid this may be particularly true on beaches with fine sand, where water retention is higher than that on beaches with coarse sand. The higher diversity of food items consumed in the intertidal during high tide is likely related to the increased prevalence of planktonic food during high tide. Our results indicate that tidal zone and level may strongly influence the feeding activity of coastal soft-bottom species and that species may show higher feeding activity during low tide. Given the current loss of intertidal habitats due to anthropogenic activity and climate-change associated factors, our study has important implications, highlighting the importance of intertidal areas for the ecology and conservation of sandy beach species. (AU)

FAPESP's process: 09/17585-6 - Population ecology of Olivella minuta (Link, 1807) (Gastropoda, Olividae) in the intertidal of Araçá and Barequeçaba beaches, northern coast of São Paulo State
Grantee:Alexander Turra
Support type: Regular Research Grants
FAPESP's process: 17/17071-9 - Preserving sandy beaches: biodiversity, goods and services, and impacts on a neglected ecosystem
Grantee:Guilherme Nascimento Corte
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 09/15893-5 - Interpopulation variability in sandy beaches: case study about the zonation, reproduction, and growth of Olivella minuta (Gastropoda, Olividae)
Grantee:Leonardo Querobim Yokoyama
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 18/22036-0 - Evaluating the potential of different benthic indicators to assess sandy beach ecological integrity: subsides for management and monitoring practices
Grantee:Hélio Hermínio Checon
Support type: Scholarships in Brazil - Post-Doctorate