Potential of Metriaclima lanisticola (Teleostei: Cichlidae) for biological control of schistosome intermediate host snails

Lundeba, Mary; Likongwe, Jeremy; Madsen, Henry; Stauffer, Jay R.

doi:10.3377/1562-7020(2007)42[45:pomltc]2.0.co;2

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…Stomachs of wild-caught M. lanisticola contained Melanoides spp. opercula, sand, detritus, insect parts, and unidentifiable animal tissue (Lundeba et al 2007). No snail shells or shell fragments were found in the stomachs, which support the conclusion that M. lanisticola removes the snail from the shell rather than ingesting and crushing the snail, as does Trematocranus placodon (Madsen et al 2010).…”

Section: Introductionsupporting

confidence: 57%

“…The snails were then maintained in the laboratory in large aquaria until used in experiments. Both fish and snails were fed a 30% crude protein fish diet (Lundeba et al 2007). …”

Section: Methodsmentioning

confidence: 99%

“…This species preys on freshwater snails by orally shelling them (Lundeba et al 2007). M. lanisticola hides in empty snail shells of Lanistes nyassanus and breeds in the sand just in front of the snail shell.…”

Section: Introductionmentioning

confidence: 99%

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Oral shelling ofBulinusspp. (Mollusca: Planorbidae) by the Lake Malaŵi cichlid,Metriaclima lanisticola(Pisces: Cichlidae)

Lundeba¹,

Likongwe²,

Madsen³

et al. 2011

Journal of Freshwater Ecology

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Metriaclima lanisticola (a native cichlid of Lake Malaŵ i) was studied under laboratory conditions to evaluate its potential as an agent for the biological control of schistosome intermediate host snails (i.e., Bulinus globosus, Bulinus nyassanus, and Bulinus tropicus). Crushing resistance of the three snail species was evaluated. M. lanisticola orally shelled snails of all species. Although there was no preference among species, fish preferred small to large snails. Crushing resistance of snails revealed that B. nyassanus had the highest resistance.

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Section: Introductionsupporting

confidence: 57%

“…The snails were then maintained in the laboratory in large aquaria until used in experiments. Both fish and snails were fed a 30% crude protein fish diet (Lundeba et al 2007). …”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Oral shelling ofBulinusspp. (Mollusca: Planorbidae) by the Lake Malaŵi cichlid,Metriaclima lanisticola(Pisces: Cichlidae)

Lundeba¹,

Likongwe²,

Madsen³

et al. 2011

Journal of Freshwater Ecology

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Crush-resistance of soft-sediment gastropods of Lake Malaŵi: implications for prey selection by Molluscivorous fishes

Evers

Madsen

Stauffer

2011

Journal of Freshwater Ecology

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An increase in human urinary schistosome transmission in southern Lake Malaŵ i has been suggested to be associated with decreased density of molluscivorous fishes due to illegal seine-net fishing from the shore. In addition, the increased density of snails (Melanoides spp.) through the invasion of an Asian morph could have changed the predators' prey choice. At Chembe village, the intermediate host snail of urinary schistosomes, Bulinus nyassanus, constitutes55% of the total gastropod fauna. This study was designed to compare crushing resistance of the intermediate host snails Bulinus globosus and B. nyassanus with that of Melanoides tuberculata, which dominates the gastropod fauna. A crush value index (CVI) as an indicator of potential prey value was expressed as the ratio of benefit (weight of snail tissue) to cost (crush resistance of snail shell). Bulinus globosus had the highest CVI. Using shell height as measure of snail size indicated that B. nyassanus had higher CVI than M. tuberculata within the size range of snails consumed by Trematocranus placodon, one of the molluscivore fishes. This may be one of the reasons that B. nyassanus is a preferred prey of T. placodon. In spite of this preference, the reduced population of T. placodon has not been able to control the population of B. nyassanus because of its apparent opportunistic feeding on large numbers of M. tuberculata.

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Schistosomiasis prevalence in Zomba, Southern Malawi

Pullanikkatil¹,

Mubako

Phalira³

et al. 2014

African Geographical Review

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A large proportion of Malawi's more than 13 million people live in rural areas where major livelihood activities include subsistence farming, irrigation and fishing. Therefore the villagers have contact with water, which exposes them to schistosomes. In this case study, surveys and parasitological investigations were conducted to determine the prevalence of schistosomiasis and to explore the relationship between disease prevalence and selected qualitative variables in five villages located in Zomba District in Lake Chilwa Basin. The study revealed a high prevalence, ranging from 23% in Machemba village to 49% in Mukhweya village. Children, 6-15 years old, were the most heavily infested (40%), and the 0-5 years group the least. A high prevalence was observed among school children (39%), and occupations such as irrigated farming (26%) and fishing (24%). Analyses at the 0.05 α-level revealed statistically significant associations between schistosomiasis prevalence and village of residence, age group and occupation type, but there was insufficient evidence to suggest a significant relationship with gender. Based on these findings, targeted awareness and mass treatment programmes were implemented in all the villages, and 9085 people were treated.

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Potential of Metriaclima lanisticola (Teleostei: Cichlidae) for biological control of schistosome intermediate host snails

Cited by 5 publications

References 2 publications

Oral shelling ofBulinusspp. (Mollusca: Planorbidae) by the Lake Malaŵi cichlid,Metriaclima lanisticola(Pisces: Cichlidae)

Oral shelling ofBulinusspp. (Mollusca: Planorbidae) by the Lake Malaŵi cichlid,Metriaclima lanisticola(Pisces: Cichlidae)

Crush-resistance of soft-sediment gastropods of Lake Malaŵi: implications for prey selection by Molluscivorous fishes

Schistosomiasis prevalence in Zomba, Southern Malawi

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