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

Kulkarni, G. K.; Hanumante, M. M.; Nagabhushanam, R.

doi:10.1007/bf00023346

Hydrobiologia

1977

DOI: 10.1007/bf00023346

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

G. K. Kulkarni

M. M. Hanumante

R. Nagabhushanam

Abstract: 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… Show more

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2021

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Cited by 2 publications

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A comparative study of the osmoregulatory ability of three species of leech (Hirudinoidea) and its relationship to their distribution in Alberta

Reynoldson¹,

Davies²

1976

Can. J. Zool.

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Three species of freshwater leeches, Nephelopsis obscura, Helobdella stagnalis, and Theromyzon rude, were examined to determine their osmoregulatory ability. N. obscura and H. stagnalis were able to maintain themselves hyperosmotically in media between 15.6 and 59.5 mosmol/1 and between 47 and 112.7 mosmol/1 respectively but were conformers at higher media concentrations. T. rude was found to be a regulator in both hypo- and hyper-osmotic media. The relationship between the osmoregulatory ability and the distribution of each species in Alberta is discussed.

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A comparative study of the osmoregulatory ability of three species of leech (Hirudinoidea) and its relationship to their distribution in Alberta

Reynoldson¹,

Davies²

1976

Can. J. Zool.

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An annotated checklist of the eukaryotic parasites of humans, exclusive of fungi and algae

Mathison¹,

Sapp²

2021

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The classification of “parasites” in the medical field is a challenging notion, a group which historically has included all eukaryotes exclusive of fungi that invade and derive resources from the human host. Since antiquity, humans have been identifying and documenting parasitic infections, and this collective catalog of parasitic agents has expanded considerably with technology. As our understanding of species boundaries and the use of molecular tools has evolved, so has our concept of the taxonomy of human parasites. Consequently, new species have been recognized while others have been relegated to synonyms. On the other hand, the decline of expertise in classical parasitology and limited curricula have led to a loss of awareness of many rarely encountered species. Here, we provide a comprehensive checklist of all reported eukaryotic organisms (excluding fungi and allied taxa) parasitizing humans resulting in 274 genus-group taxa and 848 species-group taxa. For each species, or genus where indicated, a concise summary of geographic distribution, natural hosts, route of transmission and site within human host, and vectored pathogens are presented. Ubiquitous, human-adapted species as well as very rare, incidental zoonotic organisms are discussed in this annotated checklist. We also provide a list of 79 excluded genera and species that have been previously reported as human parasites but are not believed to be true human parasites or represent misidentifications or taxonomic changes.

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

Cited by 2 publications

References 15 publications

A comparative study of the osmoregulatory ability of three species of leech (Hirudinoidea) and its relationship to their distribution in Alberta

A comparative study of the osmoregulatory ability of three species of leech (Hirudinoidea) and its relationship to their distribution in Alberta

An annotated checklist of the eukaryotic parasites of humans, exclusive of fungi and algae

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