Studies on osmotic adjustment in Tegula funebralis (Adams 1854)

Peterson, Myron B.; Duerr, Frederick G.

doi:10.1016/0010-406x(69)92094-5

Cited by 15 publications

(10 citation statements)

References 24 publications

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“…Several authors have demonstrated a decrease in the FAA pool of prosobranch gastropods following transfer to dilute media (Staaland, 1970;Turgeon, 1976;Negus, 1968;Ivanovici et al 1981;Bedford, 1971a) whereas other species have shown no such decrease (Emerson, 1969;Peterson and Duerr, 1969). The total concentration of the FAA pool in A. crenata is comparable to other marine and estuarine molluscs studied (Simpson et al, 1959;Peterson and Duerr, 1969;Turgeon, 1976); however, previous studies have shown that the total concentration of the FAA pool is attributable to only a few individual FAA (Gly, Ala, Pro, Glu, Tau, Asp, Glutamine) with Gly and Ala sometimes constituting up to 50% of the total concentration. We have demonstrated here that A. crenata utilizes the FAA pool in osmotic regulation when exposed to dilute media (Tables I, II).…”

Section: Discussionmentioning

confidence: 98%

Osmotic Balance in a Marine Pulmonate,Amphibola crenata

Shumway

Freeman

1984

Marine Behaviour and Physiology

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The pulmonate mud-snail Amphibola crenata is an osmoconformer in 25%-125% sea water, its haemolymph being slightly hyperosmotic and hyperionic to the medium. It maintains its haemolymph markedly hyperosmotic in media below 25% sea water and in freshwater, in which it survives for a week or longer. On exposure to dilute or concentrated media, water which enters or leaves the tissues preferentially enters or leaves the cells. Regulation of cell volume towards initial values is accomplished within 5 days. Measurements of changes in cell volume, and of distribution of tissue water between the intracellular and extracellular compartments, in snails moved from 100% sea water into dilute or concentrated media, and in snails moved back to 100% sea water, indicate that mechanisms of cell volume regulation are minimal in ca 60-65% sea water. Changes in the concentration of tissue free amino acids are in accord with current theories of mechanisms of isosmotic intracellular regulation. The results are discussed in the light of the taxonomic, evolutionary and ecological status of Amphibola as a shore-living, primitive, marine representative of a predominantly terrestrial and freshwater group of gastropod molluscs.

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Section: Discussionmentioning

confidence: 98%

Osmotic Balance in a Marine Pulmonate,Amphibola crenata

Shumway

Freeman

1984

Marine Behaviour and Physiology

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“…This is certainly so for marine prosobranchs. In Tegula funebralis, ninhydrin-positive substances were found in greater concentrations in the whole body of animals living in sea water than in 50% sea water (Peterson & Duerr, 1969); but the snails in 50% sea water may well have been showing sublethal effects, since they had a high mortality rate. It is thought that these nitrogenous organic compounds are responsible for the major part of intracellular adjustment of osmotic pressure, and the phenomenon is known as isosmotic intracellular regulation (see Schoffeniels & Gilles, 1972).…”

Section: Terrestrial Prosobranchsmentioning

confidence: 94%

“…In muscle, a great part of the intracellular osmotic pressure appears to be made up by amino acids (Bedford, 1971a,b;Hoyaux, Gilles & Jeuniaux, 1976;Peterson & Duerr, 1969), and the details of what is called "isosmotic intracellular regulation" are considered below (p.236). The essential problem is the control of conditions within the cells and their immediate surroundings.…”

Section: Permeability and The Effects Of Changes In The Environmentmentioning

confidence: 99%

“…Generally it is thought at euryhaline animals show better volume regulation than stenohaline ones, but the evidence is not ally conclusive (Lange, 1972). Colisella digitalis has been investigated by Tarr (1977), and Tegula funebralis (A. aams) by Peterson & Duerr (1969). This is fortunate because different tissues probably have different capacities for volume regulation.…”

Section: Terrestrial Prosobranchsmentioning

confidence: 99%

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Osmoregulation and Excretion in Prosobranch Gastropods Part I: Physiology and Biochemistry

Little

1981

Journal of Molluscan Studies

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INTRODUCTIONThe mechanisms of excretion in molluscs were reviewed by Potts (1967), and those specific to gastropods by Potts (1975), but reviews of osmoregulation in invertebrates have usually taken a broad view and dealt with a number of phyla. This review, which is presented in two parts, attempts to summarize current knowledge concerning both excretion and osmoregulation in prosobranch gastropods.Prosobranch gastropods have colonized a very wide range of habitats, from the sea and brackish waters to fresh water and parts of the land. Their degree of tolerance of changes in external conditions is therefore immensely varied. Some marine species are closely confined to normal sea water, while estuarine species such as Assiminea grayana Fleming can tolerate a range from fresh water to twice the concentration of sea water (Seelemann, 1968b;Little & Andrews, 1977). Freshwater species also show great diversity: Valvata piscinalis (Miiller) and V. cristata Miiller are found in waters with as little calcium as 0.13 mM 1~', whereas others such as V. macrostoma Morch require at least 0.5 mM 1~' (Boycott, 1936). On land, most prosobranchs are restricted to humid, calcium-rich environments, but although none lives in deserts as do some pulmonates, many tropical species of Pomatiasidae are found on dry limestone cliffs.This variation in tolerance must also be considered with reference to the diversity of structural organization. Scattered information is available for more than 25 different families, including members of all the prosobranch orders, so that it is not surprising to find quite a degree of variation. To avoid confusion, the species and families referred to are set out in Table 1.

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“…Die yon uns an L. llttorea gemessenen Hams~urekonzentrationen entsprechen den von Needham (1935} ermittelten Werten weitgehend (1,3-1,6 mg/g TG}, liegen allerdings etwas unter den von Spitzer (1937) Peterson & Duerr (1969) ebenfalls gesteigerte HarnsSurewerte messen, wenn die Tiere einem SalzstreB ausgesetzt wurden. Wit vermuten deshalb, dab die HarnsSure neben der Bedeutung als N-Depot auch noch eine Rolle bei der Osmoregulation erffillt.…”

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Studies of uric acid metabolism inLittorina littorea (Gastropoda)

Heil

Eichelberg

1983

Helgolander Meeresunters

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Studies of uric acid metabolism in Littorina littorea (Gastropoda). Periwinkles, as typical inhabitants of sea-shores, are subjected to extreme changes of environmental conditions, which affect their excretion. In Littoiina littorea uric acid, urea and ammonium were detected particularly in the kidney, but the only metabolite excreted was ammonium. Only the concentration of uric acid was dependent on the availability of water; decreasing periods of submersion during low tide and raised salinities caused a higher concentration of uric acid, while increasing periods of submersion and lowered salinities effected the opposite. Transfer of periwinkles within their intertidal habitat and laboratory experiments to test the effect of salinity showed that the concentration of uric acid in the kidney is adaptable. The dependence of uric acid concentration in the kidney on environmental conditions and the ammoniotelic excretion of L. littorea are discussed with regard to its particular living conditions. It is suggested that uric acid serves as nitrogen depot and has a particular function in osmoregulation.EINLEITUNG

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Studies on osmotic adjustment in Tegula funebralis (Adams 1854)

Cited by 15 publications

References 24 publications

Osmotic Balance in a Marine Pulmonate,Amphibola crenata

Osmotic Balance in a Marine Pulmonate,Amphibola crenata

Osmoregulation and Excretion in Prosobranch Gastropods Part I: Physiology and Biochemistry

Studies of uric acid metabolism inLittorina littorea (Gastropoda)

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