Oxygen consumption of the common indian cattle leech Poecilobdella granulosa in relation to osmotic stress

Ramamurthi, R.

doi:10.1016/0010-406x(68)90977-8

Cited by 14 publications

(10 citation statements)

References 9 publications

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“…The present data demonstrate that the leech P. viridis has a considerable narrow range of salinity tolerance as has been evidenced by Madanmohanrao (1960) and Ramamurthi (1965Ramamurthi ( , 1968 in Hirudinari granulosa, in the earthworm, Perionyx excavatus (Hanumante, 1975) and in the molluscs, Hyridella australis (Hiscock, 1953), Anodonta cygnea (Potts, 1954), Parreysia corrugata (Nagabhushanam and Lomte, 1971) and Corbicula regularis (Mudkhede, 1974) . Among the annelids, the ability to regulate volume is more wide spread than the capacity to control the os- T \ motic concentration of body fluids, although in the Polychaeta the best osmoregulators are also excellent volume regulators .…”

Section: Discussionmentioning

confidence: 50%

“…Leeches also seem to support this faculty (Madanmohanrao, 1960 ;Ramamurthi, 1968) . Widely varying osmotic responses exhibited by most freshwater animals (Lohagaonker, 1974 ;Mudkhede, 1974) have not yet been encountered for leeches .…”

Section: Discussionmentioning

confidence: 99%

“…Rosca et al (1958), in Hirudo medicinalis, and Madanmohanrao (1960) in Hirudinaria granulosa have studied the ability to regulate the volume . Ramamurthi (1962Ramamurthi ( , 1965Ramamurthi ( , 1968 indicated that osmotic and ionic concentrations of the blood of Hirudinaria granulosa increase as the leeches are placed in seawater dilutions . At greater external concentrations, body fluids become increasingly hyposmotic, sodium, magnesium and sulphate become hypoionic ; however, potassium and calcium remain hypertonic .…”

Section: Introductionmentioning

confidence: 99%

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Some aspects of osmotic biology of the freshwater leech, Poecilobdella viridis (Blanchard)

1977

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Ability of the freshwater leech, Poecilobdella viridis to withstand osmotic changes was investigated by following the fluctuations of the body weight in tap-water and in different salt concentrations . The salinity tolerance limit (lethal salt concentration) of this leech was found to be 1 .540% NaCl which equilibrates approximately 51 .359% sea-water . There was a significant weight loss in P. viridis when kept in both, hypo-and hypertonic media . It is concluded that volume regulation (through weight changes) was slight in hypotonic media whereas in hypertonic media there was an incessant decline in body weight . Adaptive significance of these findings is discussed .

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Section: Discussionmentioning

confidence: 50%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Some aspects of osmotic biology of the freshwater leech, Poecilobdella viridis (Blanchard)

1977

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“…Salinity relationships are virtually unknown. Ramamurthi (1968) has shown that an Indian cattle leech can be acclimated to 38% sea water and some survival was obtained at 75% sea water. The leeches had minimum oxygen consumption at 25% sea water and a maximum at 50%.…”

Section: H Aschelminthesmentioning

confidence: 99%

A Review of Salinity Problems of Organisms in United States Coastal Areas Subject to the Effects of Engineering Works

Gunter

Ballard

Venkataramiah

1974

GCR

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The nongaseous substances that normally move in and out of cells are metabolites, water and salts. The common salts in water determine its salinity, and the definition of sea water salinity and its composition are discussed. The relationships of salinity to all phyla of animals living in the coastal waters are reviewed, with emphasis on the estuaries of the Gulf and Atlantic coasts of the United States, which are particularly influenced by coastal engineering works and changes of salinity caused thereby.The fauna of estuaries is made up of a few brackish water species which complete their life cycles there, marine species which spend only a part of their life cycles there and which have definite low-salinity limits, a few anadromous species passing through, and a few fresh water species with high salinity limits. Organisms of marine origin are dominant. Floods and drought periods, resulting in severe osmotic changes, may kill organisms or result in drastic changes of the biota, which may take extended time to reestablish itself, if the conditions return to normal.Many invertebrate animals have few mechanisms for controlling the movement of waters and salts across their external membranes and thus are osmotic conformers. Species that cannot withstand wide salinity change are said to be stenohaline, but many species can tolerate rather wide changes; they have broad tolerance at a cellular level. Osmoregulators exhibit considerable control of their internal salinity by excretory mechanisms and permeability control of the body surface to water and salts. In general, the worms and molluscs are more often osmoconformers than the crustaceans, the latter having greater control over their internal osmotic environment than other invertebrate groups. Effects upon different stages of life history are different, but in general the limiting effects of salinity and other environmental factors bear upon the reproductive stages or the young. The limits of salinities are nearly always on the lower side with regard to estuarine organisms. Aside from osmotic adjustments, animals react to salinity changes by closing their shells, closing their burrows, burying in the bottom where interstitial water has higher salinity, or motile forms simply move out. In spite of these adjustments, none may be successful during large floods.The salinity relationships of all phyla are reviewed, even though some of them are unimportant parts of the marine populations. Dinoflagellate Protozoa which cause red tides 'This paper is modified from a report that was prepared by the Gulf Coast Research Laboratory under Contract No. DACW39-72C-0003 with the U. S. Army Engineer Waterways Experiment Station (WES) and Contract No. DACW73-70-C-0004 with the Department of the Army, Office of the Chief of Engineers (OCE) (Gunter, Ballard and Venkataramiah 1973). Preparation of that state-of-knowledge summary was initiated on the recommendation of the W E Estuarine Ecological Consultants Board in an Interim Report entitled "Effects of Engineering Activities o...

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“…Forty-three H. triserialis from Martin Bay Pond were dissected before infection experiments were conducted (Time zero controls). The leeches were minced in water or leech saline (Ramamurthi, 1969) solution (67.0 mM NaCl, 11.2 mM KC1, 6.0 mM CaCl2, 4.0 mM MgCl2) and examined for parasites. Lengths and widths of gregarine protomerites and deutomerites of 692 trophozoites were measured under X 10 using an ocular micrometer.…”

Section: Leech Dissection and Parasite Observationmentioning

confidence: 99%

Host Specificity in Metamera sillasenorum, n. sp., a Gregarine Parasite of the Leech Helobdella triserialis with Notes on Transmission Dynamics

Wise¹,

Janovy²,

Wise³

2000

The Journal of Parasitology

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Oxygen consumption of the common indian cattle leech Poecilobdella granulosa in relation to osmotic stress

Cited by 14 publications

References 9 publications

Some aspects of osmotic biology of the freshwater leech, Poecilobdella viridis (Blanchard)

Some aspects of osmotic biology of the freshwater leech, Poecilobdella viridis (Blanchard)

A Review of Salinity Problems of Organisms in United States Coastal Areas Subject to the Effects of Engineering Works

Host Specificity in Metamera sillasenorum, n. sp., a Gregarine Parasite of the Leech Helobdella triserialis with Notes on Transmission Dynamics

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