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Ecological conditions for spread of the invasive snail Physa marmorata (Pulmonata: Physidae) in the Ivory Coast

Ecological conditions for spread of the invasive snail Physa marmorata (Pulmonata: Physidae) in... Physa marmorata, originally described from the Lesser Antilles, was introduced into Africa before 1900 and has previously been reported from Bénin, Togo, Ghana, Nigeria and South Africa. Here we show that it is also common in temporary ponds, fish ponds, dams and streams in the La Mé and Agnéby basins, southern Ivory Coast. Population dynamics were studied in one river in Agboville and in one permanent pond in Attinguié. Fortnightly sampling carried out throughout 2005 at the two sites revealed two main periods of recruitment: during the first rainy season in July and during the second rainy season in October. In the Agboville river, a positive association was found between P. marmorata densities and percentage cover of the aquatic plants Ipomea aquatica and Pistia stratiotes. Similar associations were found between P. marmorata densities and both high water redox potential and rainfall values. However in the Attinguié pond, a negative association was observed between Melanoides tuberculata and P. marmorata densities. We discuss the timing, status and potential consequences of the invasion of this snail species into the Ivory Coast and the African continent. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png African Zoology Taylor & Francis

Ecological conditions for spread of the invasive snail Physa marmorata (Pulmonata: Physidae) in the Ivory Coast

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Ecological conditions for spread of the invasive snail Physa marmorata (Pulmonata: Physidae) in the Ivory Coast

Abstract

Physa marmorata, originally described from the Lesser Antilles, was introduced into Africa before 1900 and has previously been reported from Bénin, Togo, Ghana, Nigeria and South Africa. Here we show that it is also common in temporary ponds, fish ponds, dams and streams in the La Mé and Agnéby basins, southern Ivory Coast. Population dynamics were studied in one river in Agboville and in one permanent pond in Attinguié. Fortnightly sampling carried out throughout...
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Publisher
Taylor & Francis
Copyright
© Zoological Society of Southern Africa
ISSN
2224-073X
eISSN
1562-7020
DOI
10.1080/15627020.2008.11407406
Publisher site
See Article on Publisher Site

Abstract

Physa marmorata, originally described from the Lesser Antilles, was introduced into Africa before 1900 and has previously been reported from Bénin, Togo, Ghana, Nigeria and South Africa. Here we show that it is also common in temporary ponds, fish ponds, dams and streams in the La Mé and Agnéby basins, southern Ivory Coast. Population dynamics were studied in one river in Agboville and in one permanent pond in Attinguié. Fortnightly sampling carried out throughout 2005 at the two sites revealed two main periods of recruitment: during the first rainy season in July and during the second rainy season in October. In the Agboville river, a positive association was found between P. marmorata densities and percentage cover of the aquatic plants Ipomea aquatica and Pistia stratiotes. Similar associations were found between P. marmorata densities and both high water redox potential and rainfall values. However in the Attinguié pond, a negative association was observed between Melanoides tuberculata and P. marmorata densities. We discuss the timing, status and potential consequences of the invasion of this snail species into the Ivory Coast and the African continent.

Journal

African Zoology – Taylor & Francis

Published: Apr 1, 2008

Keywords: Physa marmorata; invasion; Ivory Coast; population dynamics

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