Bulinus nasutus

Bulinus nasutus
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Superorder:	Hygrophila
Family:	Bulinidae
Genus:	Bulinus
Species:	B. nasutus
Binomial name
	Bulinus nasutus; (von Martens, 1879)
Synonyms
	Bulinus praeclara (Bourguignat, 1879); Physopsis nasutus Martens, 1879; Bulinus productus (Mandahl-Barth, 1960);

Bulinus nasutus is a species of tropical freshwater snail with a sinistral shell, an aquatic gastropod mollusk in the family Planorbidae, the ramshorn snails and their allies.

Subspecies

Bulinus nasutus nasutus
Bulinus nasutus productus Mandahl-Barth, 1960^[3]

Distribution

The distribution of Bulinus nasutus includes three countries in East Africa:

Kenya^[1]
Tanzania^[1] including Zanzibar and Pemba Island^[4]
Uganda^[1]

Type locality is Bagamoyo,^[4] now in Tanzania.

Description

The width of the shell is 12 mm.^[4] The height of the shell is 25 mm.^[4]

The diploid chromosome number is 2n = 36.^[4]

Ecology

Bulinus nasutus lives in temporary pools, ditches and burrow-pits.^[4]

High concentration of chloride (468-2220 ppm Cl) have been found in pools inhabited by Bulinus nasutus in Tanzania.^[4]

Bulinus nasutus can aestivate in the dry mud for about 5–8 months.^[4] Respiration of Bulinus nasutus during aestivation is probably aerobic.^[4] They aestivate on margins of pools, and thus stop aestivation only in optimal conditions, when the pool has much water.^[4]

Webbe (1962, 1965)^[5]^[6] described population dynamics of Bulinus nasutus in Tanzania.^[4]

Mature snails lay eggs during the whole life span, primarily immediately after the main rainfall.^[4] Snails 8 weeks old, whose shell is about 8 mm in height, are mature and can lay eggs.^[4] However they require more than 12 months of life and 1-2 aestivation periods in order to reach their full size.^[4]

This species is an intermediate host for:

Schistosoma bovis^[4]
Schistosoma haematobium - it is the main intermediate host of Schistosoma haematobium in northwestern Tanzania^[4]
Echinostome spp.^[4]

References

^ ^a ^b ^c ^d Van Damme, D.; Lange, C. (2017). "Bulinus nasutus". IUCN Red List of Threatened Species. 2017: e.T184537A110775340. doi:10.2305/IUCN.UK.2017-1.RLTS.T184537A110775340.en. Retrieved 18 November 2021.
^ Martens E. (1879). "Ubersicht der von 1843 bis 1847 in Mossambique gesammelten Mollusca". Monatsberichte der Königlichen Preussischen Akademie der Wissenschaft zu Berlin 44: 727-749.
^ ^a ^b Van Damme, D.; Lange, C. (2017). "Bulinus productus". IUCN Red List of Threatened Species. 2017: e.T184779A110775829. doi:10.2305/IUCN.UK.2017-1.RLTS.T184779A110775829.en. Retrieved 18 November 2021.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r Brown D. S. (1994). Freshwater Snails of Africa and their Medical Importance. Taylor & Francis. ISBN 0-7484-0026-5.
^ Webbe G. (1962). "The transmission of Schistosoma haematobium in an area of Lake Province, Tanganyika". Bulletin of the World Health Organization 27: 59-85.
^ Webbe G. (1965). "Transmission of bilharziasis. 1. Some essential aspects of snail population dynamics and their study". Bulletin of the World Health Organization 33: 147-153.

External links

Coles G. C. (1969). "Observations on weight loss and oxygen uptake of aestivating Bulinus nasutus, an intermediate host of Schistosoma haematobium". Annals of Tropical Medicine and Parasitology 63: 393-398.
Harris R. A., Preston T. M. & Southgate V. R. (1993). "Purification of an agglutinin from the haemolymph of the snails Bulinus nasutus and demonstration of related proteins in other Bulinus spp." Parasitology 106: 127-136.
Matovu D. S. & Nditi H. P. (1978). "Laboratory experiments on the effect of aestivation on oviposition in Bulinus (Physopsis) nasutus". Proceedings of the International Congress on Schistosomiasis, Cairo, Egypt, 1975: 515-519. Cairo: Ministry of Health.
McClelland W. F. (1965). "Development of S. haematobium in Bulinus (P.) nasutus. Reports of the East African Institute for Medical Research 1963–64: 15.
Pringle G., Otieno L. H. & Chimtawi M. B. (1971). "Notes on the morphology, susceptibility to S. haematobium and genetic relationships of Bulinus (P.) globosus and B. (P.) nasutus from north-eastern Tanzania". Annals of Tropical Medicine and Parasitology 65: 211-219.
Stothard J. R. & Rollinson D. (1997). "Partial DNA sequences from the mitochondrial cytochrome oxidase subunit I (COI) gene can differentiate the intermediate snail hosts Bulinus globosus and B. nasutus (Gastropoda: Planorbidae)". Journal of Natural History 31(5): 727-737. doi:10.1080/00222939700770361.
Sturrock B. M. (1967). "The effect of infection with Schistosoma haematobium on the growth and reproduction rates of Bulinus (P.) nasutus productus. Annals of Tropical Medicine and Parasitology 61: 321-325.
Sturrock B. M. (1968). "Resistance of B. (P.) nasutus productus to infection by S. haematobium". Annals of Tropical Medicine and Parasitology 62: 393-397.

[iucn_status_18_November_2021-1] Van Damme, D.; Lange, C. (2017). "Bulinus nasutus". IUCN Red List of Threatened Species. 2017: e.T184537A110775340. doi:10.2305/IUCN.UK.2017-1.RLTS.T184537A110775340.en. Retrieved 18 November 2021.

[2] Martens E. (1879). "Ubersicht der von 1843 bis 1847 in Mossambique gesammelten Mollusca". Monatsberichte der Königlichen Preussischen Akademie der Wissenschaft zu Berlin 44: 727-749.

[Kyambadde_2011-3] Van Damme, D.; Lange, C. (2017). "Bulinus productus". IUCN Red List of Threatened Species. 2017: e.T184779A110775829. doi:10.2305/IUCN.UK.2017-1.RLTS.T184779A110775829.en. Retrieved 18 November 2021.

[Brown_1994-4] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r Brown D. S. (1994). Freshwater Snails of Africa and their Medical Importance. Taylor & Francis. ISBN 0-7484-0026-5.

[5] Webbe G. (1962). "The transmission of Schistosoma haematobium in an area of Lake Province, Tanganyika". Bulletin of the World Health Organization 27: 59-85.

[6] Webbe G. (1965). "Transmission of bilharziasis. 1. Some essential aspects of snail population dynamics and their study". Bulletin of the World Health Organization 33: 147-153.

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