scholarly journals Effects of serotonin on the heartbeat of pond snails in a hunger state

BIOPHYSICS ◽  
2015 ◽  
Vol 11 (0) ◽  
pp. 1-5 ◽  
Author(s):  
Miki Yamagishi ◽  
Takayuki Watanabe ◽  
Dai Hatakeyama ◽  
Etsuro Ito
Keyword(s):  
Pond Snails

scholarly journals Local adaptation and embryonic plasticity affect antipredator traits in hatchling pond snails

2014 ◽  
Vol 60 (4) ◽  
pp. 663-672 ◽  
Author(s):  
Sarah Dalesman ◽  
Angharad Thomas ◽  
Simon D. Rundle
Keyword(s):  
Local Adaptation ◽  
Pond Snails

Genetic Experiments with Pond Snails Lymnaea and Physa

1927 ◽  
Vol 61 (672) ◽  
pp. 54-67 ◽  
Author(s):  
Edward Drane Crabb
Keyword(s):  
Pond Snails

The effects of ultraviolet light on pond snails (Linnaeus)

1923 ◽  
Vol 37 (1) ◽  
pp. 1-13 ◽  
Author(s):  
C. W. M. Poynter ◽  
Alan Moritz
Keyword(s):  
Ultraviolet Light ◽  
Pond Snails

Acute Toxicity of Distillery Effluent on a Freshwater Fish and Three Pond Snails

1985 ◽  
Vol 13 (1) ◽  
pp. 53-58 ◽  
Author(s):  
B. S. Khangarot ◽  
P. S. Rao ◽  
S. S. Shekhawat ◽  
V. S. Durve
Keyword(s):  
Acute Toxicity ◽  
Freshwater Fish ◽  
Distillery Effluent ◽  
Pond Snails

Sensitivity of isolated eggs of pond snails: a new method for toxicity assays and risk assessment

2012 ◽  
Vol 185 (5) ◽  
pp. 4183-4190 ◽  
Author(s):  
Tengteng Liu ◽  
Joris M. Koene ◽  
Xiaoxiao Dong ◽  
Rongshu Fu
Keyword(s):  
Risk Assessment ◽  
New Method ◽  
Pond Snails

scholarly journals SYMPTOMS OF POISONING LYMNAEA (MOLLUSCA, GASTROPODA, LYMNAEIDAE) WITH WATER MEDIUM CHROME SULFATE

2021 ◽  
Vol 26 (1(48)) ◽  
pp. 89-101
Author(s):  
A. P. Stadnychenko ◽  
O. I. Uvaieva ◽  
G. Ye. Kyrychuk
Keyword(s):  
Muscle Activity ◽  
Water System ◽  
Pathological Process ◽  
Water Soluble ◽  
Snail Species ◽  
Pond Snail ◽  
Water Medium ◽  
Morphological Examination ◽  
Vital Functions ◽  
Pond Snails

Problem. Cr (III) ions are dangerously toxic for the hydrobionts of water system of the Dnieper River basin. The ions have not been previously studied in relation to their effect on a number of pond snail species. Aim. Hence, the aim of this work is to determine the range of concentrations of Cr (III) in aquatic environment that cause each of the subsequent phases of pathological process in pond snails: poisoning by the aforementioned toxicant, and presence of the complexes of symptoms of the pathological or adaptive nature that are typical for each phase. Methods.The study was conducted in 2018 in the laboratory of zoology of invertebrates of Zhytomyr Ivan Franko State University on 344 individuals of pond snails of the species Lymnaea atra, L. callomphala and L. turricula. The toxicological experiment was performed according to the technique of V. A. Alekseyev, the rate of heartbeat by D. A. Vyskushenko, the rate of branchial respiration by V. I. Zhadin, the mean daily food intake by A. P. Sushkina, the trematode (Trematoda) infection rates and morphological examination by T. A. Ginetsinskaya. Main results. Cr (III) ions are water-soluble endogenic, highly poisonous toxicant, which locally affects the respiratory branchial epithelium and skin epithelium of pond snails. The depression, and later the termination of aerobic respiration lead to their death from asphyxia. The course of poisoning is five-phase. At 0.5 MPC Cr (III) all vital functions of pond snails are carried out at the normal level (indifference phase). At concentrations of 1-2 MPC, Cr (III) ions cause an increase in their heart rate, intensity of branchial respiration, nutrition and digestion, locomotion (muscle) activity (stimulation phase). At 3 MPC of Cr (III) ions, the depression phase of intoxication develops, with the complex of symptoms including bradycardia, a sharp weakening of respiratory and trophic functions and muscle activity, with increasing degrees of hydremia, pastosity, necrosis of the respiratory epithelium and underlying tissues, and the occurrence of bleeding and hemorrhage (depressive, sublethal and lethal phases).   Conclusions. The studied species of pond snails are highly sensitive to the action of Cr (III) ions and can be suggested for use as test objects in the system of hydroecological monitoring of terrestrial waters of Ukraine.

scholarly journals The Philippine pond snails of the genus Vivipara

1907 ◽  
Vol 32 (1518) ◽  
pp. 135-150 ◽  
Author(s):  
Paul Bartsch
Keyword(s):  
Pond Snails

The “index of the copulatory apparatus” and its application to the systematics of freshwater pulmonates (Mollusca: Gastropoda: Pulmonata)

2011 ◽  
Vol 20 (1) ◽  
pp. 11-27 ◽  
Author(s):  
M.V. Vinarski
Keyword(s):  
Related Species ◽  
Species Delimitation ◽  
Single Specimen ◽  
Closely Related Species ◽  
Copulatory Apparatus ◽  
Pond Snails ◽  
Different Origin

The index of the copulatory apparatus (ICA) is calculated as the ratio between lengths of the praeputium and the penis sheath in the copulatory apparatus in freshwater pulmonate mollusks. ICA is often used for species’ delimitation and identification in different taxa of pulmonates, however, its variation (in both intra- and interspecific levels) is still poorly studied that may make troubles for systematicists. The variation of ICA in pond snails (family Lymnaeidae Rafinesque, 1815) has been studied in several aspects (intra- and interpopulation, interspecific). It has been shown that the index varies considerably, and it is almost impossible to identify a single specimen on the base of ICA solely. However, mean ICA values are more useful for taxonomic and identification purposes. Closely related species of lymnaeids demonstrate some extent of overlap between their ranges of ICA variation that hampers their identification but is not a cause for synonymisation. The factors of different origin that potentially may influence the ICA values in freshwater pulmonates have been reviewed. It is revealed that ICA manifests significant ontogenic and (in some lymnaeid species) geographical changes. The use of ICA in pulmonate systematics should be accompanied by data on variation in another characters of conchological or anatomical kind.

3. On some Points in the Anatomy of the Nervous System of the Pond Snails, Planorbis and Lymnæus

1882 ◽  
Vol 11 ◽  
pp. 576-581
Author(s):  
F. E. Beddard
Keyword(s):  
Nervous System ◽  
Cerebral Ganglion ◽  
Considerable Extent ◽  
Careful Study ◽  
Plate Xvii ◽  
Pond Snails ◽  
Système Nerveux

The best figures of the nervous system of these animals are those of Lacaze-Duthiers, in his Paper Sur les Otocystes des Mollusques, and in that Sur le Système Nerveux des Gastéropodes. By a careful study of the nervous system of these two gasteropods, chiefly by cutting sections, I have discovered one or two small points in their anatomy which, as far as I can make out, have hitherto escaped attention.These two types, though so closely allied, differ to a considerable extent in the arrangement and structure of certain of their ganglia; compare the figures given by Lacaze-Duthiers of the nervous system of Lymnæus on Plate xvii. in Volume i. of his Archives with that cf Planorbis on Plate iii. of the same volume. It will be seen at once that the cerebral ganglion of Lymnæus is far more complicated than that of Planorbis, consisting of five separate lobes, while that of Planorbis appears to be made up of not more than two.

scholarly journals XXX. Some observations on the economy of molluscous animals, and the structure of their shells

1833 ◽  
Vol 123 ◽  
pp. 771-819 ◽  
Keyword(s):  
Fresh Water ◽  
Young Animal ◽  
Internal Organs ◽  
Additional Advantage ◽  
Pond Snails

The shells of Mollusca appear to be coeval with the first formation of the animal: they may be observed covering the embryo on its first development in the egg, even before it has acquired its proper shape or any of its internal organs. The accurate Swammerdam observed them in the eggs of several of the garden and pond snails. His observations have been recently verified and extended by Pfeiffer, on many species of land and fresh-water Mollusca; and I have myself observed the same fact in the eggs of several animals belonging to the different orders of marine shells: there is reason, therefore, to believe that this circumstance is general throughout the class. These observations are most easily made on the embryo of the fresh-water shells, such as the Lymnœœ, Physœ, Ancyli , and Bithyniœ, the eggs of these animals being covered with a transparent coat; while the viviparous Mollusca, and especially the Littorinœ, Paludinœ , and Cyclades , offer the additional advantage of exhibiting the embryos of their animals in all the different states of development at the same time. The cephalopodous Mollusca form no exception; their bone, composed of two or three calcareous plates, being found fully developed in the egg of the Cuttle-fish some time before the young animal is hatched.

Sign in / Sign up

Export Citation Format

Share Document