Salinity and temperature tolerance of the invasive freshwater gastropod Tarebia granifera
Invasive aquatic species, such as the gastropod Tarebia granifera, can cause ecological isturbances and potentially reduce biodiversity by displacing indigenous invertebrates. In South Africa, T. granifera was first recorded in an estuarine environment in the St Lucia Estuary. Its tolerance to salin...
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| Format: | Article |
| Language: | English |
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Academy of Science of South Africa
2010-04-01
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| Series: | South African Journal of Science |
| Online Access: | https://sajs.co.za/article/view/10169 |
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| author | Nelson Miranda Renzo Perissinotto Christopher Appleton |
| author_facet | Nelson Miranda Renzo Perissinotto Christopher Appleton |
| author_sort | Nelson Miranda |
| collection | DOAJ |
| description | Invasive aquatic species, such as the gastropod Tarebia granifera, can cause ecological isturbances and potentially reduce biodiversity by displacing indigenous invertebrates. In South Africa, T. granifera was first recorded in an estuarine environment in the St Lucia Estuary. Its tolerance to salinity and temperature was investigated through the experimental manipulation of these factors. T. granifera can tolerate temperatures between 0 ºC and 47.5 ºC, allowing it to survive high temperature extremes. The species may also survive cold snaps and invade higher altitude areas. More remarkably, this snail survives high salinity for a relatively long time, as LS50 (lethal salinity for 50% of the population) was reached at 30 psu over 65 - 75 days. However, higher salinity adversely affected the T. granifera population. Snails acclimated to freshwater conditions and suddenly transferred to 30 psu experienced 100% mortality within 48 h. Snail activity also declined with increasing salinity. T. granifera's environmental tolerance and parthenogenetic characteristics are the keys to successful introduction and establishment. Therefore, the management of T. granifera may prove diffcult in the short to medium term. The present findings constitute a contribution to the knowledge of biological invasions in Africa and to the understanding of estuarine invasions by T. granifera. |
| format | Article |
| id | doaj-art-b8c48e42e6024fcea5408076dd3896a0 |
| institution | Kabale University |
| issn | 1996-7489 |
| language | English |
| publishDate | 2010-04-01 |
| publisher | Academy of Science of South Africa |
| record_format | Article |
| series | South African Journal of Science |
| spelling | doaj-art-b8c48e42e6024fcea5408076dd3896a02025-08-20T03:54:07ZengAcademy of Science of South AfricaSouth African Journal of Science1996-74892010-04-011063/47 pages7 pages8371Salinity and temperature tolerance of the invasive freshwater gastropod Tarebia graniferaNelson Miranda0Renzo Perissinotto1Christopher Appleton2School of Biological and Conservation Sciences, University of KwaZulu-Natal, Westville campusSchool of Biological and Conservation Sciences, University of KwaZulu-Natal, Westville campusSchool of Biological and Conservation Sciences, University of KwaZulu-Natal, Westville campusInvasive aquatic species, such as the gastropod Tarebia granifera, can cause ecological isturbances and potentially reduce biodiversity by displacing indigenous invertebrates. In South Africa, T. granifera was first recorded in an estuarine environment in the St Lucia Estuary. Its tolerance to salinity and temperature was investigated through the experimental manipulation of these factors. T. granifera can tolerate temperatures between 0 ºC and 47.5 ºC, allowing it to survive high temperature extremes. The species may also survive cold snaps and invade higher altitude areas. More remarkably, this snail survives high salinity for a relatively long time, as LS50 (lethal salinity for 50% of the population) was reached at 30 psu over 65 - 75 days. However, higher salinity adversely affected the T. granifera population. Snails acclimated to freshwater conditions and suddenly transferred to 30 psu experienced 100% mortality within 48 h. Snail activity also declined with increasing salinity. T. granifera's environmental tolerance and parthenogenetic characteristics are the keys to successful introduction and establishment. Therefore, the management of T. granifera may prove diffcult in the short to medium term. The present findings constitute a contribution to the knowledge of biological invasions in Africa and to the understanding of estuarine invasions by T. granifera.https://sajs.co.za/article/view/10169 |
| spellingShingle | Nelson Miranda Renzo Perissinotto Christopher Appleton Salinity and temperature tolerance of the invasive freshwater gastropod Tarebia granifera South African Journal of Science |
| title | Salinity and temperature tolerance of the invasive freshwater gastropod Tarebia granifera |
| title_full | Salinity and temperature tolerance of the invasive freshwater gastropod Tarebia granifera |
| title_fullStr | Salinity and temperature tolerance of the invasive freshwater gastropod Tarebia granifera |
| title_full_unstemmed | Salinity and temperature tolerance of the invasive freshwater gastropod Tarebia granifera |
| title_short | Salinity and temperature tolerance of the invasive freshwater gastropod Tarebia granifera |
| title_sort | salinity and temperature tolerance of the invasive freshwater gastropod tarebia granifera |
| url | https://sajs.co.za/article/view/10169 |
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