Article

The abundance of an invasive freshwater snail Tarebia granifera (Lamarck, 1822) in the Nseleni River, South Africa

Published in: African Journal of Aquatic Science
Volume 42, issue 1, 2017, pages: 75–81
DOI: 10.2989/16085914.2017.1298984
Author(s): RW JonesDepartment of Zoology and Entomology, South Africa, JM HillDepartment of Zoology and Entomology, South Africa, JA CoetzeeDepartment of Botany, South Africa, TS AveryDepartment of Biology and Mathematics & Statistics, Canada, OLF WeylCentre for Invasion Biology, South Africa, MP HillDepartment of Zoology and Entomology, South Africa

Abstract

The invasive freshwater snail Tarebia granifera (Lamarck, 1822) was first reported in South Africa in 1999 and it has become widespread across the country, with some evidence to suggest that it reduces benthic macroinvertebrate biodiversity. The current study aimed to identify the primary abiotic drivers behind abundance patterns of T. granifera, by comparing the current abundance of the snail in three different regions, and at three depths, of the highly modified Nseleni River in KwaZulu-Natal, South Africa. Tarebia granifera was well established throughout the Nseleni River system, with an overall preference for shallow waters and seasonal temporal patterns of abundance. Although it is uncertain what the ecological impacts of the snail in this system are, its high abundances suggest that it should be controlled where possible and prevented from invading other systems in the region.

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