scispace - formally typeset
Search or ask a question
Topic

Bulinus truncatus

About: Bulinus truncatus is a research topic. Over the lifetime, 414 publications have been published within this topic receiving 5640 citations.


Papers
More filters
Journal Article
TL;DR: Compared to the results of previous studies in the area, there was evidence of changes in the distribution and abundance of some species of mollusks.
Abstract: As part of the risk assessment of the reintroduction of Schistosomiasis in the El Kelaa des Sraghna province (Morocco), 200 sites in Tessaout Amont irrigation system spread over five districts were surveyed between May 2012 and May 2013. A total of 7 species were identified. Bulinus truncatus , intermediate host of schistosomiasis in Morocco, has been, with Lymnea peregra and Physa acuta , the most frequently encountered. Compared to the results of previous studies in the area, there was evidence of changes in the distribution and abundance of some species of mollusks.
19 Oct 2018
TL;DR: Study of the effect of starvation and infection by miracidia of Schistosoma haematobium on the lipid content of Bulinus truncatu s showed that the major neutral lipids in infected, starved and control B. truncatus were fatty acids and phospholipids, wax and triglycerol were seen in stressed conditions.
Abstract: Schistosoma haematobium infection has continued to be endemic in much of Africa and the Middle East, second only to malaria in importance as a parasitic disease.Thin layer chromatography (TLC) was used to study the effect of starvation and infection by miracidia of Schistosoma haematobium on the lipid content of Bulinus truncatu s . B. truncatus snails were collected and kept in aerated plastic aquaria containing tap water. The progeny were transferred to other plastic aquaria where they were separated and designated as control/fed(c), infected (i), and starved(s). Urine samples of people infected with S. haematobium were collected and analysed for miracidia which were introduced into the aquaria labeled “infected”. Only snails that shed matured brevifuvcate cercariae were used for the lipid analysis. The snails were homogenized and lipids were extracted in chloroform-methanol (2:1). The lipids extracts were analyzed using petroleum ether, diethyl-ether, and acetic acid (90:10:1). All the snails survived the 2weeks starvation. Visual chromatograms and Retention factor (Rf) values calculations showed that the major neutral lipids in infected, starved and control B. truncatus were fatty acids and phospholipids, wax and triglycerol were seen in stressed conditions. The value of total lipids in starved B. truncatus were approximately 2times lower than the control (3.66+0.00 < 6.79 ± 1.06g/dl) while value of sta
01 Jan 1997
TL;DR: In this paper, the authors present progeny-array analyses of the self-fertilization and correlated matings in the tropical freshwater snail Bulinus truncatus and reveal that high selfing rates may have a strong genetic basis.
Abstract: SUMMARY Studies on the evolution of self-fertilization and sexual polymorphisms (the co-occurrence of several sexual morphs in a species) have focused on plants. Aphally, a sexual polymorphism occurring in gastropods, oers the opportunity to extend study of these issues to animals. We present progeny-array analyses of the selfing rate and correlated matings in the tropical freshwater snail Bulinus truncatus. This study is based on 447 ospring originating from 57 families and five natural populations. To overcome the lack of allozyme polymorphism, four polymorphic microsatellite markers were used. Selfing rates higher than 78% were detected in all populations, and no correlation with the aphally ratio (the proportion of individuals lacking the male copulatory organ per population) was evident. Outcrossing was detected in 17 families only, and individual outcrossing rates were variable and did not depend on the sexual morph of the mother. These results illustrate the power of microsatellites for detailed genetic studies, indicate that high selfing rates may have a strong genetic basis, and unexpectedly suggest that phally polymorphism may be neutral with respect to selfing.
01 Jan 1992
TL;DR: It is suggested that temperature-sensitive phally determination may shed light on the selective pressures maintaining outcrossing in B. truncatus.
Abstract: Phally, a genital dimorphism found in some species of self-compatible simultaneous hermaphrodites, presents an opportunity to examine factors maintaining outcrossing within an animal species in the presence of recombination. Both aphallics and euphallics can self-fertilize but only euphallics develop a functional penis and prostate allowing them to donate sperm. Previous studies of phally in the gastropod Bulinus truncatus (Mollusca: Pulmonata) suggest that phally may be under direct genetic control in some populations and strongly influenced by environmental factors in others. Experiments reported here identify temperature as a cue affecting phally deter- mination in two populations of B. truncatus. In both populations, a higher proportion of euphallics was produced at low temperature (22 ? 1?C) than at high temperature (30 ? 1?C). Temperatures experienced by parents did not affect the proportion of euphallics they produced. Instead, phally was sensitive to temperature during the egg stage postoviposition and during the hatchling stage; the relative influence of temperature before and after hatching varied between populations. The total number of hatchlings reaching maturity at high and low temperature did not differ, but at low temperature, snails took longer to hatch and mature, and had lower survivorship. Just as studies of environmental sex determination have shed light on selective pressures influencing sex ratio evolution, we suggest that temperature-sensitive phally determination may shed light on the selective pressures maintaining outcrossing in B. truncatus.

Network Information
Related Topics (5)
Schistosomiasis
8.6K papers, 133.1K citations
80% related
Schistosoma mansoni
7.9K papers, 202.3K citations
79% related
Plasmodium berghei
5.2K papers, 150.6K citations
75% related
Leishmaniasis
8.4K papers, 217.8K citations
75% related
Anopheles
4.8K papers, 140.1K citations
75% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202112
20208
20198
20185
20178
20165