Results 121 to 130 of about 9,122 (188)
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Review of Recent Ecotoxicological Studies on Cladocerans
Journal of Environmental Science and Health, Part B, 2006Cladocerans have been widely used as the bioassay organisms in evaluating the impact of different toxic substances. Literature survey during the last 10 years revealed that cladoceran ecotoxicological research has been in an exponential phase constituting nearly 10% of publications on this group.
S S S, Sarma, S, Nandini
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Succession of cladocerans in a northern Italian ricefield
Hydrobiologia, 1991The seasonal succession of cladocerans was studied in an experimental ricefield (never treated with biocides) located on the Po River Plain (Province of Reggio Emilia) in 1982, the first year of rice cultivation, and in two later years, 1984 and 1986.
FERRARI, Ireneo +3 more
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Ecotoxicity of nanosilver on cladocerans and the role of algae provision
Environmental Science and Pollution Research, 2022Silver nanoparticles (AgNPs) are applied in diverse industries due to their biocide and physicochemical properties; therefore, they can be released into aquatic systems, interact with environmental factors, and ultimately exert adverse effects on the biota.
Victoria Soledad Andrade +5 more
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Cladoceran assemblages in a mineralization gradient
Hydrobiologia, 2001Cladoceran assemblages were studied in littoral samples from 44 water bodies in Central Spain, showing great differences in salinity and permanence of water. Principal component analyses (PCA) were performed with data on cladoceran relative abundances to identify the main groups of species. Five main groups of species were found, defining the following
Loles Boronat +2 more
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STATISTICAL ANALYSIS OF THE CLADOCERAN REPRODUCTIVITY TEST
Environmental Toxicology and Chemistry, 1986AbstractThe data from a renewal toxicity test are awkward to interpret if some of the adult organisms die during the experiment. The usual summary statistic is the mean number of young produced per adult, but when some adults die, the mean can be defined in two different ways, the mean overall (MOA) and the mean ignoring mortality (MIM).
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Apus and a Rare Cladoceran in Britain
Nature, 1948THE primitive crustacean known as apus, or Triops cancriformis (Bosc), which is of particular interest to zoologists, has only been recorded five times in Britain. It was found in 1738 in Kent1, at the beginning of last century near Christchurch in Hampshire2, a little later at Bristol3, in 1907 in Kirkcudbrightshire4, and in 1934 near Fordingbridge in
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The penetration of cladocerans into saline waters
Hydrobiologia, 1993Cladocerans are essentially freshwater organisms, many of which have been able to penetrate slightly saline waters (up to 5% salinity), both thalassic and athalassic, some of which occur at higher salinities, and a few of which, mostly non-chydorids, penetrate still higher salinities (15—30% and even higher) and may be confined to these salinities ...
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Comparative phylogeography of marine cladocerans
Marine Biology, 2008We examined the population genetics of six species of marine cladocerans, using a ~600 bp fragment of the cytochrome oxidase subunit I gene sequence. Phylogenetic analysis revealed significant intraspecific, semi-allopatric phylogenetic breaks in four out of five species belonging to the Podonidae, supporting an ancient radiation and oceanic expansion ...
Alan Durbin +2 more
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Evolutionary and ecological consequences of interspecific hybridization in cladocerans
Experientia, 1995The evolutionary process of interspecific hybridization in cladocerans is reviewed based on ecological and population genetic data. The evolutionary consequences of hybridization, biogeographic patterns and fitness comparisons are analyzed within the conceptual framework of theories on hybridization. Among species of the D.
Schwenk, K., Spaak, P.
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The Evolution of Cladoceran Life Histories
The Quarterly Review of Biology, 1980The selection pressures imposed by invertebrate are of primary significance in the evolution of cladoceran life histories. Small-sized cladoceran species are vulnerable to invertebrates throughout their lives, but minimize the adverse effects of juvenile mortality by producing relatively large offspring, which reach maturity at an early age.
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