Results 171 to 180 of about 21,008 (228)

Modelling periphyton in irrigation canals

Ecological Modelling, 2010
Periphyton developments in water distribution canals induce major disturbances for system management, such as clogging problems when fixed algae are detached. Periphyton models can be used to simulate and improve canal management. The purpose of this paper is to review the periphyton models which integrate a hydrodynamic effect, and to discuss their ...
Fovet, Ophélie, Belaud, Gilles, Litrico, X., Charpentier, Sylvain, Lancar, L., Bertrand, C., Dauta, Alain, Hugodot, C.   +7 more
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Periphyton: Autoradiography of Zinc-65 Adsorption

Science, 1970
The major site of sorption of zinc-65 in natural, matlike periphyton is on the upper surface of the community. There is a diffusion gradient within the community. Expression of results from short-term spiking experiments should thus be presented on an areal rather than gravimetric basis.
F L, Rose, C E, Cushing
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Periphyton-based pond polyculture.

2005
AbstractA brief history of fish polyculture system and pond polyculture (in particular) as an age-old practice in Asia is provided. A list of suitable fish species for polyculture is also given. The benefits of traditional polyculture can also be enjoyed in periphyton-based aquaculture systems.
M. E. Azim, M. A. Wahab
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Size Distribution in Periphyton

Canadian Journal of Fisheries and Aquatic Sciences, 1987
When periphytic organisms growing on artificial plants were grouped in logarithmically increasing size classes, patterns in the distribution of biomass were consistent over the season and under different grazing regimes, despite taxonornical changes in the dominant taxa of algae and invertebrates.
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Phyco-Periphyton in an Oligotrophic Lake

Transactions of the American Microscopical Society, 1965
Much limnological literature over the last century has been concerned with problems of primary productivity. In lentic waters large enough in size to promote a harvestable standing crop of fish, there exists numerous biocoenoses which have not been sufficiently considered.
J W, Foerster, H E, Schlichting
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Factors Affecting Sampling Variability of Freshwater Periphyton and the Power of Periphyton Studies

Canadian Journal of Fisheries and Aquatic Sciences, 1992
Estimates of periphyton abundance, biomass (as biovolume, chlorophyll, dry mass, or ash-free dry mass), and production were reanalyzed to examine the effect of the mean value, sampler size, type of substratum, and habitat on the variance of these estimates.
Antoine Morin, Antonella Cattaneo
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On stream periphyton‐turbulence interactions

New Zealand Journal of Marine and Freshwater Research, 1997
Abstract A set of experiments was carried out to determine what effects periphyton communities could have on near‐bed hydraulic fields. We analysed velocity distribution, skewness and kurtosis coefficients, Reynolds stresses, relative turbulence intensity, coefficient of eddy diffusivity, velocity spectra, and turbulence scales at two flows with, and ...
V. I. Nikora, D. G. Goring, B. J. F. Biggs   +2 more
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Periphyton removal by freshwater micrograzers

1994
In various experiments, the freshwater snail species Lymnaea peregra (Mull.), Physa fontinalis (L.), Valvata piscinalis (Mull.) and Bithynia tentaculata (L.) significantly removed periphyton from glass slides, while the two tested crustacean species, Asellus aquaticus (L.) and Gammarus pulex (L.), did not. B.
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Periphyton-based cage aquaculture.

2005
AbstractThere are two types of aquaculture rearing system: land-based and water-based. The former includes ponds, raceways and tanks while the latter comprises enclosures, pens and cages. Cage is a rearing system enclosed on the bottom as well as the sides by wooden, mesh or more commonly net screens.
S. M. H. Huchette, M. C. M. Beveridge
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Periphyton control on stream invertebrate diversity: is periphyton architecture more important than biomass?

Marine and Freshwater Research, 2014
There is little consensus on the form of the periphyton biomass–macroinvertebrate diversity relationship in streams. One factor that these relationships do not account for is the growth form of primary producers. We (1) examined the periphyton biomass–macroinvertebrate diversity relationship in 24 streams of Cantabria, Spain, in July 2007, and (2 ...
Jonathan D. Tonkin, Russell G. Death, José Barquín   +2 more
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