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FRESHWATER MOLLUSC STUDIES - A PERSONAL EXPERIENCE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: S.J. Pretorius --- , South AfricaMy contribution reviews some of the research activities of the Snail Research Unit. Taking Unit. Taking some liberties on the chronological order, the transition is traced from the species descriptions of the early years, the extensive field surveys, laboratory experimentations,... -
A laboratory assessment of the potential molluscicidal activity of some Nigerian plant species used as anthelmintics
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AA Adenusi --- Parasitology Unit, Department of Plant Science and Applied Zoology, Nigeria AB Odaibo --- Department of Zoology, NigeriaLaboratory studies were conducted to determine the potential molluscicidal activity of five Nigerian plant species used in alternative medicine practice as anthelmintics. Laboratory-bred adult Biomphalaria pfeifferi, the snail host of Schistosoma mansoni in Nigeria, and their viable 0- to 24-hour-old... -
Composition of macrobenthos in the Wouri River estuary mangrove, Douala, Cameroon
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: VM Ngo-Massou --- Department of Botany, Faculty of Science, Cameroon GL Essome-Koum --- Department of Botany, Faculty of Science, Cameroon E Ngollo-Dina --- , USA N Din --- Department of Botany, Faculty of Science, CameroonThe macrobenthos of mangroves is dominated by crabs and molluscs, which have a significant ecological role in terms of the structure and function of mangroves. The aim of this study was to determine the abundance and biological diversity of these... -
Macrozoobenthic biodiversity patterns in the northern province of the Benguela upwelling system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: ML Zettler --- Department of Biology, Germany R Bochert --- Department of Biology, Germany F Pollehne --- Department of Biology, GermanyThis paper describes macrozoobenthos diversity in the vicinity of the Angola–Benguela Frontal Zone between 15° and 23° S in offshore waters of the Namib biogeographic province in a comprehensive zoogeographical context. At 38 selected stations, about 500 different macrozoobenthic taxa... -
Impact of Sargochromis codringtonii (Teleostei: Cichlidae) on pulmonate snails in irrigation ponds in Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MosesJ Chimbari Paul Makoni Henry MadsenThe impact of Sargochromis codringtonii on pulmonate snails, including those that transmit schistosomiasis, was assessed over 29 months in 2 800m2 irrigation ponds. Snail populations in fishless ponds were first monitored for 10 months before 85 S. codringtonii were introduced... -
The molluscicidal efficacy of methanol extracts of Pterocarpus angolensis, Sclerocarya birrea, Pappea capensis and Commiphora africana against Lymnaea natalensis and Helisoma duryi
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Ndabambi --- Department of Environmental Science and Health, Zimbabwe N Basopo --- Department of Applied Biology and Biochemistry, Zimbabwe LC Nkiwane --- Department of Textile Technology, Zimbabwe YS Naik --- Department of Environmental Science and Health, ZimbabweTropical plants have been shown to contain compounds that have some molluscicidal activity against snail intermediate hosts of parasitic trematodes. Dried methanol extracts of Pterocarpus angolensis, Sclerocarya birrea, Pappea capensis and Commiphora africana were screened for molluscicidal activity against Lymnaea... -
Quantification of shell banding polymorphism in the East African tree snail Sitala jenynsi (Pulmonata: Ariophantidae)
Item type: Journal Article • Journal: African Zoology • Authors: Peter F. Kasigwa --- Department of Zoology, Tanzania John A. Allen --- School of Biological Sciences, University of Southampton, U.K.In eastern Africa, populations of the tree snail Sitala jenynsi are monomorphic, dimorphic or trimorphic for the width of the upper brown band on their shells.We measured the variation in the width of this band in several populations and analysed... -
Evolutionary retention of defensive lateral pedal glands in the smallest siphonariid limpet (Gastropoda: Pulmonata)
Item type: Journal Article • Journal: African Zoology • Authors: Shirley C Pinchuck --- Electron Microscope Unit, Rhodes University, South Africa Brian R Allanson --- Department of Zoology and Entomology, South Africa Alan N Hodgson --- Department of Zoology and Entomology, South AfricaDespite its cryptic habitat and habits, light and transmission electron microscopy has revealed that like many other siphonariids Siphonaria compressa, the smallest species of this genus, possesses lateral pedal glands. The pear-shaped glands (about 120 µm long×70 µm maximum diameter)... -
Furcocercous cercariae shed by the freshwater snails Pila occidentalis (Mousson, 1887) and Biomphalaria pfeifferi (Krauss, 1848) in the Okavango Delta, Botswana
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C Jansen van Rensburg --- Department of Zoology and Entomology, South Africa PH King --- Department of Biology, South Africa JG van As --- Department of Zoology and Entomology, South AfricaDuring July 2009 and 2010 surveys of snail-borne larval trematodes of the Okavango Delta floodplains and lagoons were undertaken. Cercaria mohemboense were shed by Pila occidentalis (Mousson, 1887) and Cercaria dubaensis and Cercaria indistinctus were shed by Biomphalaria pfeifferi (Krauss,... -
The abundance of an invasive freshwater snail Tarebia granifera (Lamarck, 1822) in the Nseleni River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RW Jones --- Department of Zoology and Entomology, South Africa JM Hill --- Department of Zoology and Entomology, South Africa JA Coetzee --- Department of Botany, South Africa TS Avery --- Department of Biology and Mathematics & Statistics, Canada OLF Weyl --- Centre for Invasion Biology, South Africa MP Hill --- Department of Zoology and Entomology, South AfricaThe 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... -
Settlement of the invasive mussel Mytilus galloprovincialis in a warm temperate estuarine embayment in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: J Radloff --- , South Africa AN Hodgson --- , South Africa L Claassens --- , South AfricaMytilus galloprovincialis, a globally successful marine alien invasive species, occupies all artificial hard substrata in the embayment of the Knysna estuary, South Africa. The current study compared temporal and spatial settlement patterns of M. galloprovincialis within this environment. Settlement was... -
A review of marine invertebrates used as fishing baits and the implications for national and regional management in the Western Indian Ocean
Item type: Journal Article • Journal: African Zoology • Authors: Carol A Simon --- , South Africa Agnes WN Muthumbi --- , Kenya Charles M Kihia --- , Kenya Kyle MS Smith --- , South Africa Riaan B Cedras --- , South Africa Paubert T Mahatante --- , Madagascar Virginia W Wangondu --- , Kenya Robert Katikiro --- , TanzaniaIn the Western Indian Ocean (WIO), more than 76 records from peer-reviewed and grey literature identified approximately 60 invertebrate taxa harvested for bait and food. The most diverse phyla were Mollusca, followed by Arthropoda and Annelida, with few records of... -
Temporal and spatial variation of the molluscan community structure in Oualidia Lagoon, Moroccan Atlantic coast
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F El Asri --- , Morocco A Errhif --- , Morocco MN Tamsouri --- , Morocco H Nhhala --- , Morocco M Maanan --- , France H Zidane --- , MoroccoThe molluscan assemblages inhabiting the coastal waters of Oualidia Lagoon, Morocco, were studied during winter and summer of 2013. The taxonomic composition and diversity were determined at 43 sample sites. Thirty-four mollusc taxa were recorded in total, including 12 species... -
Molluscicidal and cercaricidal effects of Persicaria senegalensis on Radix natalensis snails and their echinostome-shed cercariae in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MC Mathole --- Sefako Makgatho Health Sciences University, South Africa PH King --- Sefako Makgatho Health Sciences University, South AfricaPersicaria senegalensis is an aquatic plant of the Family Polygonaceae with apparent molluscicidal properties. The research evaluated the molluscicidal effect of P. senegalensis on the freshwater snail Radix natalensis, and its echinostome-shed cercariae. Various compounds from Persicaria senegalensis were extracted... -
Molluscicidal effects of Persicaria senegalensis on terrestrial snails Cornu aspersum in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MC Mathole --- Sefako Makgatho Health Sciences University, South Africa PH King --- Sefako Makgatho Health Sciences University, South AfricaCornu aspersum is an invasive terrestrial snail pest of the family Helicidae. In South Africa, where the snail causes significant crop losses in viticulture areas, synthetic molluscicides are used to control them. However, the latter negatively affects both those who... -
The grazer Cymbula oculus (Patellogastropoda: Patellidae) serves as an important settlement substrate for several of its macroalgal prey
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: W Moosa --- University of the Western Cape, South Africa J Phillips --- University of the Western Cape, South Africa GW Maneveldt --- University of the Western Cape, South AfricaIntertidal communities are predictably affected by both physical and biological factors, with herbivory as a particularly important factor. Instead of dense beds of macroalgae, which typically characterise the mid-eulittoral zone along the south coast of South Africa, at Kalk Bay... -
Macrofauna assemblages and their relationships with environmental parameters in mangroves of Kribi, Cameroon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Vanessa Maxemilie Ngo-Massou --- High Teacher’s Training College, University of Yaoundé I, Cameroon Ernest Flavien Kottè-Mapoko --- Institute of Fisheries and Aquatic Sciences at Yabassi, The University of Douala, Cameroon Guillaume Léopold Essomè-Koum --- Institute of Fisheries and Aquatic Sciences at Yabassi, The University of Douala, Cameroon Elegbede Isa Olalekan --- Lagos State University, Nigeria Boubakary --- The University of Maroua, Cameroon Laurant Nyamsi-Moussian --- The University of Douala, Cameroon Alphonse Konango-Samè --- The University of Douala, Cameroon Ophman Nsame-Bile --- The University of Douala, Cameroon Wendy Loys Keedi-A-Bougen --- The University of Douala, Cameroon Joseph Lebel Tamesse --- High Teacher’s Training College, University of Yaoundé I, Cameroon Ndongo Din --- The University of Douala, CameroonChanges in composition, abundance and distribution of macrofaunal assemblages are subject to environmental influences. However, the effects of ecological disturbance on mangrove habitats in Cameroon have not been sufficiently studied with regard to macrofaunal assemblages. This work aims to identify...