Results 251 to 260 of about 35,632 (283)
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Sublethal effects of copper on the freshwater crab Potamonautes warreni
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2002The mass specific rates of oxygen consumption (M (O(2)) M(b)(-1)), ammonia excretion (M (NH(4)-N) M(b)(-1)) and carbon dioxide production (M (CO(2)) M(b)(-1)) were measured after 7, 14 and 21 days exposure of adult Potamonautes warreni to a sublethal concentration of 1.0 mg Cu l(-1) (15.75 micromol l(-1)).
W.J. Van Aardt +2 more
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Studies on the locomotor activity of the freshwater crab, Potamon fluviatile
Hydrobiologia, 1988Locomotor activity in the freshwater crab, Potamon fluviatile, was studied both in the field, by direct counts of animals along a stream section, and by means of actographs. General metabolism was evaluated through the analysis of oxygen consumption.
GHERARDI, FRANCESCA +3 more
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Global diversity of crabs (Aeglidae: Anomura: Decapoda) in freshwater
Hydrobiologia, 2007The freshwater anomuran crabs of the family Aeglidae are all restricted to southern South America occurring in Chile, Brazil, Bolivia, Uruguay, Paraguay, and Argentina. The family consists of a single genus, Aegla, containing 63 currently described species. There are another 5–10 known yet undescribed species to complement this diversity.
Keith A. Crandall +4 more
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Freshwater Crabs of the Nile System
1976In 1931 Major S. S. Flower brought together the results of 25 years interest in the Crustacea in his ‘Notes on Freshwater Crabs in Egypt, Sinai and the Sudan’ (Proc, Zool. Soc. Lond.). In doing so he expressed the hope that his paper might prove to be of use as a starting point for other workers.
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Freshwater Crabs as Poor Zoogeographical Indicators: a Critique of Banarescu (1990) [PDF]
Crustaceana, 1995 Abstract A critique of Bănărescu's (1990) ideas and hypotheses regarding the importance of freshwater crabs in zoogeography is presented. We contend that many of Bănărescu's generalizations are too simplistic and do not agree with our observations and findings about freshwater crabs.
Ng, P.K., Rodriguez, G.
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Morphology and function of the copulatory system in freshwater crabs of the genusPotamon
Journal of Morphology, 1999To understand the reproductive processes of freshwater crabs of the genus Potamon, we examined the first and second gonopod and the gonoducts of the female by histological methods. The gonopods are highly modified compared to those of other brachyuran crabs.
Michael Türkay +2 more
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Evolution of Afrotropical freshwater crab lineages obscured by morphological convergence
Molecular Phylogenetics and Evolution, 2006We use sequence data derived from six DNA gene loci to examine evolutionary and biogeographic affinities among all freshwater crab families. With an emphasis on the Afrotropical fauna that includes Africa, Madagascar, and the Seychelles, we test the proposed Gondwanan cladogenesis of the group.
Daniels, Savel R +4 more
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The crayfish plague pathogen can infect freshwater‐inhabiting crabs
Freshwater Biology, 2014Summary The oomycete Aphanomyces astaci is generally considered a parasite specific to freshwater crayfish, and it has become known as the crayfish plague pathogen. Old experimental work that reported transmission of crayfish plague to the Chinese mitten crab Eriocheir sinensis, and the ability of A.
Svoboda, Jiří +9 more
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Freshwater Crabs and Shrimps (Crustacea: Decapoda) of the Nile Basin [PDF]
, 2009 Freshwater crabs are present in almost all freshwater bodies in the Nile River basin ranging from the main river to mountain streams, and from extensive wetlands to rift valley lakes, but these decapod crustaceans are absent from the more arid regions of the Sahara and East Africa. Some 14 species of freshwater crabs (Potamonautidae) and six species of
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Cadmium inhibits the vitellogenesis of freshwater crab Sinopotamon henanense
Environmental Toxicology and Chemistry, 2015Abstract Cadmium (Cd) may pose risks to freshwater organisms, including crabs that live at the interface of sediments and water column all year round. One of the major changes that occur during oocyte maturation of crabs is the production of vitellin.
Dongmei Liu +3 more
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