Ecology of Freshwater Snails in Opa Reservoir and Research Farm Ponds at Obafemi Awolowo University Ile-Ife, Nigeria

Owojori, Olugbenga J.; Asaolu, S.O.; Ofoezie, Ifeanyi Emmanuel

doi:10.3923/jas.2006.3004.3015

Cited by 30 publications

(23 citation statements)

References 22 publications

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“…Studies among school-aged children in various parts of the country, in both rural and urban environments, have shown that S. haematobium is clearly a problem for this age group, with prevalence ranging from 20 to 40% in typical communities (Okpala, 1961;Amali, 1988;Anosike et al, 1992Anosike et al, , 2003Agi, 1995;Okoli & Odaibo, 1999;Ekejindu et al, 2002;Odaibo et al, 2004;Okoli & Iwuala, 2004;Umar & Parakoyi, 2005) but can be as high as 50-70% in areas where environmental changes occur due to constructions such as man-made dams and quarries (Pugh & Gilles, 1978;Edungbola et al, 1988;Ogbe & Olojo, 1989;Ofoezie et al, 1991;Nduka et al, l995, 2006;Mafiana et al, 2003;Sarkinfada et al, 2009). Focal distribution of freshwater snails belonging to the genus Bulinus has been reported in many parts of the country (Okwuosa & Ukoli, 1980;Imevbore et al, 1988;Ofoezie, 1999;Owojori et al, 2006). Ndifon & Ukoli (1989) observed the presence of 14 snail species from diverse freshwater habitats in south-western Nigeria: nine pulmonates (Biomphalaria pfeifferi, B. globosus, B. truncatus, Lymnaea natalensis, Physa sp., Aplexa waterloti, B. forskalii, Gyraulus costulatus, Ferrissia sp., Segmentorbis sp.)…”

Section: Introductionmentioning

confidence: 99%

Molecular approaches to the identification ofBulinusspecies in south-west Nigeria and observations on natural snail infections with schistosomes

et al. 2010

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The current study considers the distribution of a small sample of 138Bulinussnails, across 28 localities within eight Nigerian states. Snails were identified using a combination of molecular methods involving both DNA sequencing of a partial cytochrome oxidase subunit 1 (cox1) fragment and restriction profiles obtained from ribosomal internal transcribed spacer (its) amplicons. The results showed that the majority ofBulinussamples tested belonged to the speciesBulinus truncatuswhile only two wereBulinus globosus. The use ofRsaI restriction endonuclease to cleave the ribosomalitsofBulinus, as a method of species identification, was adopted for the majority of samples, this being a quicker and cheaper method better suited to small laboratory environments. Polymerase chain reaction (PCR) amplification of the schistosomeDra1repeat within each of the collectedBulinussamples was employed to determine the extent and distribution of infected snails within the sample areas. Successful amplification of theDra1repeat demonstrated that 29.7% of snails were infected with schistosomes. Sequencing of the partial schistosomeitsfrom a small subset of snail samples suggested that some snails were either penetrated by bothSchistosoma haematobiumandSchistosoma bovismiracidia or hybrid miracidia formed from the two species.

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Section: Introductionmentioning

confidence: 99%

Molecular approaches to the identification ofBulinusspecies in south-west Nigeria and observations on natural snail infections with schistosomes

et al. 2010

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“…Environmental factors affect the distribution patterns, the life cycles and population dynamics of snails and hence patterns of transmission (Rollinson et al, 2001). General studies on the ecology of freshwater snails in Nigeria have considered rainfall, pH, oxygen concentration, conductivity and presence or absence of macrophytes (Ndifon and Ukoli 1989;Olofintoye & Odaibo, 1996;Owojori et al, 2006). The majority of studies on schistosomiasis laid emphasis on disease prevalence andintensity of infection among human populations with little or no emphasis on the intermediate snail hosts.Some of such studies involving the local spatial and temporal transmission patterns for S. haematobium include those in Zanzibar (Rudge et al 2008), in Tanzania (Hamburger et al, 2004), in Niger (Labbo et al, 2008), in Kenya (Clennon et al, 2006), in Nigeria (Oladejo & Ofoezie, 2006), and in the Senegal River Basin (Opara et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

The bionomics and diversity of freshwater snails species in Yewa North, Ogun State, Southwestern Nigeria

Salawu¹,

Odaibo

2014

Helminthologia

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Snail control as a form of integrated control for schistosomiasis has been strongly advocated but data on biocontrol using competitor snails are relatively lacking in most endemic areas. Monthly sampling of freshwater snails was conducted in four water bodies in Yewa North Local Government Area, Ogun State, Nigeria. Monthly in situ measurements of the physico-chemical characteristics of surface waters were carried out using field meters. A total number of 13 snail species were recovered from the water bodies. Of these, Bulinus camerunensis was reported for the first time in Nigeria. A significant positive relationship occurred between snail density and dissolved oxygen. Other important relationships were those between Lanistes lybicus and Bulinus senegalensis, Bulinus globosus and Bulinus jousseaumei, and B. senegalensis and Segmentorbis augustus. Snail control using competitor snails should be integrated into schistosomiasis management programmes in endemic areas in order to prevent residual schistosomiasis transmission after control intervention through mass drug treatment.

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“…The dominance of M. tuberculata in all sampling sites over other species in the water body in Warwade dam did not agree with findings of Dogara et al(2019) that reported it as the second most abundant and dominant species. However, other works carried out in similar water bodies by Rader et al (2003), Owojori et al (2006), Abdulkadiret al (2017 and Almeida et al (2018) reported M. tuberculata to be the most abundant and dominant species.…”

Section: Discussionmentioning

confidence: 87%

Distribution and Abundance of Freshwater Snails Around an Earth Dam in Northern Nigeria

Dogara¹,

Alhaji²,

Balogun³

et al. 2020

Preprint

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Following a preliminary investigation a study was carried from April to October, 2019 to establish more information on the abundance and distribution of freshwater snails in relation to physiochemical factors of Warwade dam. Four sampling sites; human activity, vegetation cover, lentic and lotic were selected for the study along the bank of the dam. Freshwater snails were collected in each of the four sampling sites using long handled scoop net with mesh 0.2mm and hand picking methods. Water samples from the sampling sites were analyzed in the laboratory using standard procedures. A total of 2,027 of fresh water snails belonging to ten species were identified with Bulinus globosus 12(0.6%) and Lymnaea natalensis 12(0.6%) having the lowest abundance while Melanoides tuberculata 1553(76.6%) had the highest. Snail abundance was highest in site characterized by human activities (670) followed by vegetation (482), lotic (442) and lentic (433) waters. Most of the physico-chemical factors measured appeared to favour the growth and survival of fresh water snails. pH (p = 0.01), water current (p = <0.01) and magnesium ion concentration (p = < 0.01) varied significantly across the four sites. Only calcium ion concentration was significantly associated with snail abundance (p = 0.04). Snail abundance showed weak positive relationship with water temperature, color, turbidity and concentration of magnesium ion. The dominance of M. tuberculata over all species particularly those of medical and veterinary importance could have positive implication for their control in the dam.

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Ecology of Freshwater Snails in Opa Reservoir and Research Farm Ponds at Obafemi Awolowo University Ile-Ife, Nigeria

Cited by 30 publications

References 22 publications

Molecular approaches to the identification ofBulinusspecies in south-west Nigeria and observations on natural snail infections with schistosomes

Molecular approaches to the identification ofBulinusspecies in south-west Nigeria and observations on natural snail infections with schistosomes

The bionomics and diversity of freshwater snails species in Yewa North, Ogun State, Southwestern Nigeria

Distribution and Abundance of Freshwater Snails Around an Earth Dam in Northern Nigeria

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