The effects of desiccation and starvation upon the weight, histology and ultrastructure of the reproductive tract of Biomphalaria glabrata, intermediate host of Schistosoma mansoni

M, de Jong-Brink

doi:10.1007/bf00307443

Cited by 32 publications

(8 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The functionning of the ovotestis, on the other hand is wholly compensated and once feeding is resumed, egg production becomes normal. The effects of starvation observed on immature planorbid snails are rather similar to those obtained on mature animals (Jong-Brink, 1973;Christie et al, 1974;Vianey-Liaud, 1973, 1979, 1980. Starvation only delays reproduction of snails.…”

Section: Discussionsupporting

confidence: 69%

“…The study of starvation on planorbid snails has followed essentially two lines of research: some authors have investigated the physiological, metabolical and biochemical implications: Becker & Hirtbach (1975), Becker & Schmale (1978), von Brand et al (1957), Christie et al (1974), El-Emam& Madsen (1982), Emerson (1967), Mohamed & Ishak (1982), Schmale & Becker (1977), , , while others have paid particular attention to its effects on reproductive parameters: El-Emam & Madsen (1982), Jong-Brink (1973), Vianey-Liaud (1973, 1979, 1980. In most cases the animals used are mature snails of Biomphalaria glabrata.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of starvation on growth and reproductive apparatus of two immature freshwater snails Biomphalaria pfeifferi and Biomphalaria glabrata (Gastropoda: Planorbidae)

Vianey‐Liaud

1984

Hydrobiologia

View full text Add to dashboard Cite

Starvation of immature snails of Biomphalariapfeifferi and B. glabrata results in an arrest of growth and animals remain immature. Spermatogenesis is limited to spermatogonia(B.g.) or spermatocytes 1 (B.p.). The number and the size of oocytes remain inferior to that of controls. Animals show reduced genital tracts.Once feeding is restored, growth is resumed but wet weight and shell diameter do not reach the same level as in controls. Fecundity and gametogenesis do not proportional to body weight.

show abstract

Section: Discussionsupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Effects of starvation on growth and reproductive apparatus of two immature freshwater snails Biomphalaria pfeifferi and Biomphalaria glabrata (Gastropoda: Planorbidae)

Vianey‐Liaud

1984

Hydrobiologia

View full text Add to dashboard Cite

show abstract

“…A similar process has been described in the albumen gland of Biomphalaria glabrata (de Jong-Brink 1973). During the pre-reproductive period the parenchymal cells prepare their organelles for the next reproductive period, when maximal synthetic activity takes place.…”

Section: Anatomical Considerationssupporting

confidence: 59%

Pallial oviduct of Pomacea canaliculata (Gastropoda): ultrastructural studies of the parenchymal cellular types involved in the metabolism of perivitellins

et al. 2006

View full text Add to dashboard Cite

Seasonal variations in the morphology of the parenchymal mass and function of the albumen gland/capsule gland complex have been studied in Pomacea canaliculata, together with the cellular types involved in the synthesis and secretion of perivitellin fluid components. The two major parenchymal cell types, albumen secretory cells (AS) and labyrinthic cells (LC), undergo seasonal variations throughout the annual reproductive cycle, which is divided into three periods. Both cellular types show maximal development and structural complexity during the reproductive period (spring and summer). AS cells have a well-developed Golgi complex and rough endoplasmic reticulum and their secretory granules show electron-dense particles of about 20 nm (probably galactogen). These cells are uniquely involved in ovorubin and PV2 perivitellin synthesis and their secretory granules are the single storage site for these two major perivitellins, as revealed by immunoelectron microscopy. AS also possess calcium deposits that infiltrate the cytoplasmic matrix. The luminal surfaces of LC exhibit long cilia intermingled with sparce short microvilli. Basally, the plasma membrane shows deep irregular folds that extend through the cytoplasm up to the subapical region. Calcium deposits infiltrate the cytoplasm and accumulate in the extracellular space of the basal labyrinth. Nerve terminals seem to be involved in the regulation of parenchymal cell secretion. At the post-reproductive period, AS markedly change their aspect following the release of most of the secretory granules into the acinar lumen. LC decrease in volume, the number of their cilia decreases, their cytoplasmic folds are much thinner and their extracellular spaces lack calcium particles. At the pre-reproductive period (winter), AS and LC recover and prepare for the subsequent period.

show abstract

“…Planorbarius corneus survived for more than 50 days of desiccation under a similar experimental protocol as that used in our study (Poznańska et al ., ). For tropical aestivating pulmonates, the survival time during air exposure can be extended up to 1–3 years (Richards, ; de Jong‐Brink, ; Parashar & Rao, ).…”

Section: Discussionmentioning

confidence: 99%

Life on the edge: survival and behavioural responses of freshwater gill‐breathing snails to declining water level and substratum drying

et al. 2015

View full text Add to dashboard Cite

Summary Reductions in water level and temporary exposure of substratum to air are two of the most important factors structuring communities in temperate near‐shore zones. Snails are suitable model organisms to study responses of aquatic communities to water‐level fluctuations, as they often inhabit near‐shore zones and are relatively mobile. In a laboratory study, we investigated survival and behavioural responses (horizontal migration and burrowing) of three freshwater gill‐breathing snails: Viviparus viviparus (L.) (large and small individuals), Bithynia tentaculata (L.) and Potamopyrgus antipodarum (Gray) to substratum drying. We studied the effect of distance to a suitable habitat (24 and 48 cm) and rate of dewatering (gradual: eight days or sudden) on horizontal migrations of snails as well as their burrowing depth. Large V. viviparus individuals were best adapted to dewatering: they were resistant to drying (surviving more than 3 weeks of air exposure) and migrated in response to decreasing water level and/or burrowed into the substratum. Their horizontal movement was negatively related to the rate of dewatering and distance needed to get to a submerged area. However, they were able to migrate to some extent even after a sudden dewatering and to reach a distant submerged refuge. Small V. viviparus exhibited similar behavioural responses as large individuals, but were less resistant to drying, surviving approximately one week of air exposure. Neither B. tentaculata nor P. antipodarum exhibited behavioural adaptations to desiccation, although resistance to drying differed markedly from approximately 3 weeks for B. tentaculata to 3–4 days for P. antipodarum. Resistance to drying and behavioural adaptations are two factors enabling benthic organisms to survive in harsh near‐shore environments. Our study revealed marked intra‐ and interspecific differences in response to dewatering, depending on body size, distance to a refuge and rate of dewatering. Appropriate physiological and behavioural responses may increase fitness of organisms under changing environmental conditions and contribute to their survival.

show abstract

The effects of desiccation and starvation upon the weight, histology and ultrastructure of the reproductive tract of Biomphalaria glabrata, intermediate host of Schistosoma mansoni

Cited by 32 publications

References 43 publications

Effects of starvation on growth and reproductive apparatus of two immature freshwater snails Biomphalaria pfeifferi and Biomphalaria glabrata (Gastropoda: Planorbidae)

Effects of starvation on growth and reproductive apparatus of two immature freshwater snails Biomphalaria pfeifferi and Biomphalaria glabrata (Gastropoda: Planorbidae)

Pallial oviduct of Pomacea canaliculata (Gastropoda): ultrastructural studies of the parenchymal cellular types involved in the metabolism of perivitellins

Life on the edge: survival and behavioural responses of freshwater gill‐breathing snails to declining water level and substratum drying

Contact Info

Product

Resources

About