Hostname: page-component-5d59c44645-l48q4 Total loading time: 0 Render date: 2024-02-24T01:51:52.235Z Has data issue: false hasContentIssue false

Interactions between benthic molluscs in a Sulawesi mangal, Indonesia: the cerithiid mud-creeper Cerithium coralium and potamidid mud-whelks, Terebralia spp.

Published online by Cambridge University Press:  09 April 2003

R.S.K. BARNES
Affiliation:
Operation Wallacea Marine Research Centre, Hoga, Wakatobi Marine National Park, Sulawesi Tenggara, Indonesia Department of Zoology, University of Cambridge, Cambridge, CB2 3EJ, UK, E-mail: rsb1001@cam.ac.uk

Abstract

The sediment surface within the Osbornia belt of a mangal on Pulau Hoga, Tukang Besi Islands, Sulawesi, Indonesia, is dominated inter alia by deposit-feeding gastropod molluscs at a mean density of some 230 ind m−2 although, unusually, species of Cerithidea do not occur. Densities of the two most numerous species, the potamidid mud-whelk Terebralia sulcata and the Cerithidea-like cerithiid mud-creeper Cerithium coralium, are inversely correlated, although the species occurred together in 42% of quadrat samples. Within and beyond the normal range of field densities of each species (C. coralium mean 153 m−2; T. sulcata mean 75 m−2) there was no evidence of intraspecific depression of feeding rate, as assessed by the production of faecal pellets, although this was significantly reduced in the occasional very high density aggregations of C. coralium (>1100 m−2). The presence of the larger T. sulcata did appear to have a strong inhibitory effect on feeding in C. coralium; the converse, however, could not be demonstrated. Abundances of Terebralia palustris and C. coralium were also inversely correlated where the two co-occurred.

Type
Research Article
Copyright
2003 Marine Biological Association of the United Kingdom

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)