Английская Википедия:Bulinus nasutus
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[1]
Distribution
The distribution of Bulinus nasutus includes three countries in East Africa:
Type locality is Bagamoyo,[3] now in Tanzania.
Description
The width of the shell is 12 mm.[3] The height of the shell is 25 mm.[3]
The diploid chromosome number is 2n = 36.[3]
Ecology
Bulinus nasutus lives in temporary pools, ditches and burrow-pits.[3]
High concentration of chloride (468-2220 ppm Cl) have been found in pools inhabited by Bulinus nasutus in Tanzania.[3]
Bulinus nasutus can aestivate in the dry mud for about 5–8 months.[3] Respiration of Bulinus nasutus during aestivation is probably aerobic.[3] They aestivate on margins of pools, and thus stop aestivation only in optimal conditions, when the pool has much water.[3]
Webbe (1962, 1965)[4][5] described population dynamics of Bulinus nasutus in Tanzania.[3]
Mature snails lay eggs during the whole life span, primarily immediately after the main rainfall.[3] Snails 8 weeks old, whose shell is about 8 mm in height, are mature and can lay eggs.[3] However they require more than 12 months of life and 1-2 aestivation periods in order to reach their full size.[3]
This species is an intermediate host for:
- Schistosoma bovis[3]
- Schistosoma haematobium - it is the main intermediate host of Schistosoma haematobium in northwestern Tanzania[3]
- Echinostome spp.[3]
References
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. Шаблон:Doi.
- 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.
- ↑ Шаблон:Cite iucn
- ↑ 2,0 2,1 2,2 Ошибка цитирования Неверный тег
<ref>; для сносокiucn status 18 November 2021не указан текст - ↑ 3,00 3,01 3,02 3,03 3,04 3,05 3,06 3,07 3,08 3,09 3,10 3,11 3,12 3,13 3,14 3,15 3,16 Brown D. S. (1994). Freshwater Snails of Africa and their Medical Importance. Taylor & Francis. Шаблон:ISBN.
- ↑ 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.
