|
|
|
|
|
| Bruggen, A.C. van; Appleton, C.C.. |
| CONTENTS Ι. General introduction................ 3 2. Notes on the climate, ecology and isolation of the coastal dune forest at Lake Sibaya, pertinent to its molluscan fauna........... 5 2a. Introduction................. 5 2b. Climate.................. 7 2c. Description of the habitats............. 12 2d. Ecological observations on the Mollusca.......... 13 2e. The origin and isolation of the dune forest environment...... 14 3. Systematic part................. 17 3a. Gastropoda Prosobranchia............. 18 3b. Gastropoda Pulmonata.............. 19 3c. Zoogeographical conclusions............. 38 4. Summary................... 41 5. References.................. 41 1. GENERAL INTRODUCTION Lake Sibaya (sometimes misspelt Sibayi) is a freshwater lake on the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.73. |
| Ano: 1977 |
URL: http://www.repository.naturalis.nl/record/317725 |
| |
|
|
| Appleton, C.C.. |
| INTRODUCTION Van Bruggen (1974) discussed the identity of specimens of the North American pulmonate genus Helisoma Swainson, 1840 (Mollusca: Planorbidae) from three localities in southern Africa. He identified Helisoma (Seminolina) cf. duryi seminole Pilsbry, 1934, from a farm dam in South West Africa and Helisoma (?Pierosoma) sp. from an artificial pond at Mandini in Zululand (recorded as Helisoma sp. by Brown, 1967) and from Cape Point on the Cape Peninsula. These identifications were based on shell characters since only dry material was available. Snails belonging to Helisoma have been collected by the present author from two additional localities and are examined below. Both these populations occur(red) in the suburban areas of major South African... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.73. |
| Ano: 1977 |
URL: http://www.repository.naturalis.nl/record/317992 |
| |
|
|
| Appleton, C.C.; Forbes, A.T.; Demetriades, N.T.. |
| The Asian prosobranch snail Tarebia granifera was reported from South Africa (and Africa) for the first time in 1999 in northern KwaZulu-Natal though it was probably introduced sometime prior to 1996. In the 10 years since its discovery it has spread rapidly, particularly northwards, into Mpumalanga province, the Kruger National Park and Swaziland. The snail has colonized different types of habitat, from rivers, lakes and irrigation canals to concrete lined reservoirs and ornamental ponds. It reaches very high densities, up to 21 000 m-2, and is likely to impact on the entire indigenous benthos of the natural waterbodies of the region – more so than any other invasive freshwater invertebrate known from the country. The indigenous thiarids Thiara amarula,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Tarebia granifera; South Africa; Invasion; Bionomics; 42.73. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/311930 |
| |
|
|
|
