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  • Artikel  (133)
  • Biology  (101)
  • Chemistry  (27)
  • Methodology  (22)
  • GEOPHYSICS
  • General Chemistry
  • Inorganic Chemistry
  • LUNAR AND PLANETARY EXPLORATION
  • Ambleside, UK  (133)
  • 1
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    Advisory report on nutrient levels and related ecology of Malham Tarn (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5092 | 1256 | 2011-09-29 15:25:26 | 5092 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: Aspects of reported nutrient levels and their ecological implications for Malham Tarn are discussed. Discussion centres upon the data given here as appendices, involving possible evidence of a long-term increase in the concentrations of some nutrients (especially nitrate) of significance for the Tarn's ecology and conservation. Further comparative tests of some methods of chemical analysis employed in obtaining those data are reported.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater ecology ; Freshwater lakes ; Nutrients (mineral) ; Nitrates ; Phosphorus ; Alkalinity ; Methodology ; Ultraviolet radiation ; Hydrology ; England ; Malham Tarn
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 42
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  • 2
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    Progress on the salmon investigation (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5110 | 3949 | 2011-09-29 15:23:55 | 5110 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: An article detailing some of the conclusions of the salmon investigation undertaken by the author, on the River Eden and its tributaries, for the previous few years. It is proposed that seasonal changes in young salmon growth are related to water temperature variation. A figure is included showing length of fish compared to the average temperature of water in the River Eden over a two year duration. The article describes comparative work undertaken to date between three streams within the Thurso watershed and the River Eden. A table is included showing the average size of fish in each of the watercourses compared. Laboratory experiments on the effects of temperature on young salmon are outlined, as well as investigative work undertaken into the realtionship between fish scales and fish length.
    Schlagwort(e): Biology ; Ecology ; Fisheries ; Water temperature ; Freshwater fish ; Length ; Scales ; Seasonal variations ; Feeding ; Temperature effects ; Annual reports ; Salmo salar ; England ; Scotland
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 51-55
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  • 3
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    Invertebrate animals of the Lake District (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5109 | 3949 | 2011-09-29 15:23:53 | 5109 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater molluscs ; Aquatic insects ; Invertebrate larvae ; Aquatic organisms ; Annual reports ; Corixidae ; Coleoptera ; England ; Lake District
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 47-51
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  • 4
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    Final report on the updating service on environmental chemicals in freshwater for the period 9.1.89 to 9.7.89 (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5238 | 1256 | 2011-09-29 15:13:42 | 5238 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: This report presents five batches of data which have been despatched to the Joint Research Centre, Ispra. The data as been allocated to various ECDIN (Environmental Chemicals Data and Information Network) files. The data comprises environmental chemicals in the freshwater environment, taking in paricular consideration: aquatic toxicity, bioaccumulation, metabolism and elimination biodegradation.
    Schlagwort(e): Chemistry ; Ecology ; Limnology ; Data ; Data processing ; Data collections ; Chemical compounds ; Toxicity ; Bioaccumulation ; Biodegradation ; Metabolism
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 8
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  • 5
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    Corroborative studies on the effects of sample variation on three macroinvertebrate biological assessment methods at different water quality states (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5259 | 1256 | 2011-09-29 15:09:27 | 5259 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: In recent collaborative biological sampling exercises organised by the Nottingham Regional Laboratory of the Severn-Trent Water Authority, the effect of handnet sampling variation on the quality and usefulness of the data obtained has been questioned, especially when this data is transcribed into one or more of the commonly used biological methods of water quality assessment. This study investigates if this effect is constant at sites with similar typography but differing water quality states when the sampling method is standardized and carried out by a single operator. An argument is made for the use of a lowest common denominator approach to give a more consistent result and obviate the effect of sampling variation on these biological assessment methods.
    Beschreibung: Bilateral study of methods 2 - Pollution Report No.8
    Schlagwort(e): Biology ; Limnology ; Pollution ; Sampling ; Samplers ; Methodology ; Standardization ; Rivers ; Invertebrate larvae ; England ; Trent River
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 19
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  • 6
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    Investigations on phytoplankton with special reference to water usage (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5281 | 1256 | 2011-09-29 15:11:31 | 5281 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Experiments and observations on the phytoplankton of certain lakes in the English Lake District were made from early 1973 to the end of March, 1974. They included laboratory and lake bioassays and observations on the quantity and quality of the phytoplankton in six lakes. The introductory sections of the report are about algae, the ecology of phytoplankton and the scope of the contracted work. Laboratory bioassays on water from one lake, Blelham Tarn, showed that phosphorus, silicon (for diatoms) and organic substances forming complexes with iron were the major substances limiting the growth of the algae tested. The growth of the test algae was limited to different degrees by those substances and, to some extent, to a greater or lesser degree at different times of year. It is suggested that a relatively simple form of bioassay could give valuable information to water undertakings. Lake bioassays and other experiments were carried out by using large in situ tubular plastic enclosures. Two such investigations are described. The effects of a change in sewerage in two drainage basins on the phytoplankton of three lakes is described and some data given about changes since 1945 in three other lakes in the same overall drainage basin. These latter lakes have been affected too by changes in sewerage and by increasing inputs of domestic and agricultural wastes. Throughout, the relevance of the work done to practical problems of water usage is kept in mind and discussed. In the last section special reference is made to the largely unpredictable results of water transfers. The report ends with a note on river phytoplankton.
    Schlagwort(e): Biology ; Limnology ; Management ; Phytoplankton ; Water use ; Water supply ; Freshwater lakes ; Bioassays ; Tests ; Controlled conditions ; Thermal stratification ; Tubing ; Nutrients (mineral) ; Diatoms ; England ; English Lake District
    Repository-Name: AquaDocs
    Materialart: book , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 64
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  • 7
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    Provisional atlas of the freshwater leeches of the British Isles (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5282 | 1256 | 2011-09-29 15:11:34 | 5282 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Distribution maps were included in the second edition of the F.B.A. Scientific Publication on British freshwater leeches (Mann 1964). When that publication was extensively revised and enlarged to include a review of the literature on the ecology of leeches (Elliott & Mann 1979), it was decided that new maps should be published separately. The original maps were based on 1097 records whereas 4198 records were used for the new maps. The total British Isles list comprises sixteen species, thirteen genera and four families of leeches.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Distribution records ; Ecological distribution ; Maps ; Freshwater organisms ; Hirudinea
    Repository-Name: AquaDocs
    Materialart: book , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 31
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  • 8
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    Ecological indicators of water quality in small rivers (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5270 | 1256 | 2011-09-29 15:10:29 | 5270 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: At the present time hydrobiological indicators are widely used for the control of surface water quality. Results of the applying of methods suggested at the 1st Soviet-American seminar (1975), development of improved methods and estimation of their usefulness for various conditions are presented in this report. Among the criteria permitting an estimation of the degree and character of changes in water quality and their connection with the functioning of river ecosystems in general, the biological tests of natural waters appears to be the most universal one and is being carried out in two main directions — ecological and physiological. This study summarises approaches in both directions.
    Schlagwort(e): Biology ; Limnology ; Pollution ; River water ; Rivers ; Water quality ; Water quality control ; Indicators
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 6
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  • 9
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    Published work on freshwater science from the FBA, IFE and CEH, 1929-2006 (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5284 | 1256 | 2011-09-29 15:11:41 | 5284 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: A new listing of published scientific contributions from the Freshwater Biological Association (FBA) and its later Research Council associates – the Institute of Freshwater Ecology (1989–2000) and the Centre for Ecology and Hydrology (2000+) is provided. The period 1929–2006 is covered. The compilation extends an earlier list assembled by in 1979.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Bibliographies ; Freshwater sciences ; Hydrobiology ; Hydrology ; Limnology
    Repository-Name: AquaDocs
    Materialart: book , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 161
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  • 10
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    Changes of water quality and sediment phosphorus of a small productive lake following decreased phosphorus loading (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5293 | 1256 | 2011-09-29 15:08:09 | 5293 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Esthwaite Water is the most productive or eutrophic lake in the English Lake District. Since 1945 its water quality has been determined from weekly or biweekly measurements of temperature, oxygen, plant nutrients and phytoplankton abundance. The lake receives phosphorus from its largely lowland-pasture catchment, sewage effluent from the villages of Hawkshead and Near Sawrey, and from a cage-culture fish farm. From 1986 phosphorus has been removed from the sewage effluent of Hawkshead which was considered to contribute between 47% and 67% of the total phosphorus loading to the lake. At the commencement of phosphorus removal regular measurements of phosphorus in the superficial 0-4 cm layer of lake sediment were made from cores collected at random sites. Since 1986 the mean annual concentration of alkali-extractable sediment phosphorus has decreased by 23%. This change is not significant at the 5% level but nearly so. There has been no marked change in water quality over this period. Summer dominance of blue-green algae which arose in the early 1980s after decline of the previous summer forms, Ceratium spp., has been maintained. Improvement in water quality is unlikely to be achieved at the present phosphorus loading.
    Schlagwort(e): Chemistry ; Limnology ; Pollution ; Eutrophication ; Freshwater lakes ; Limnological surveys ; Phosphorus ; Phytoplankton ; Primary production ; Sediment analysis ; Water quality ; England ; Esthwaite Water
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 119-131
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  • 11
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    The ecological impact of different mechanisms of chronic sub-lethal toxicity on feeding and respiratory physiology (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5307 | 1256 | 2011-09-29 15:06:39 | 5307 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Sub-lethal toxicity tests, such as the scope-for-growth test, reveal simple relationships between measures of contaminant concentration and effect on respiratory and feeding physiology. Simple models are presented to investigate the potential impact of different mechanisms of chronic sub-lethal toxicity on these physiological processes. Since environmental quality is variable, even in unimpacted environments, toxicants may have differentially greater impacts in poor compared to higher quality environments. The models illustrate the implications of different degrees and mechanisms of toxicity in response to variability in the quality of the feeding environment, and variability in standard metabolic rate. The models suggest that the relationships between measured degrees of toxic stress, and the maintenance ration required to maintain zero scope-for-growth, may be highly nonlinear. In addition it may be possible to define critical levels of sub-lethal toxic effect above which no environment is of sufficient quality to permit prolonged survival.
    Schlagwort(e): Biology ; Limnology ; Pollution ; Toxicity ; Sublethal effects ; Toxicity tests ; Models ; Metabolism ; Narcosis ; Animal physiology ; Risk management ; Respiration
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 88-97
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  • 12
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    The connection between single species and ecosystems (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5306 | 1256 | 2011-09-29 15:06:38 | 5306 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Ecosystem level models are motivated by some combination of scientific and practical concerns. Those models motivated by practical concerns are likely to bear little historical relation to previous models. Mechanisms of interaction between particular species and their ecosystems vary enormously. Some species literally construct their own ecosystems. Others have more or less complex and important interactions with other species so that their presence or absence may alter the ecosystem. Prior information about the natural history of particular species can make ecosystem investigations quicker, cheaper, and more effective. The optimal resource for preparing to deal with the unlimited diversity of questions asked of ecologists would be a large' computerized databank of natural history observations for as many species as possible.
    Schlagwort(e): Ecology ; Limnology ; Oceanography ; Ecosystems ; Aquatic environment ; Species ; Interspecific relationships ; Biology ; Models
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 75-87
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  • 13
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    Molecular biomarkers and toxic consequences of impact by organic pollution in aquatic organisms (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5314 | 1256 | 2011-09-29 15:06:13 | 5314 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Organic contaminants are readily bioaccumulated by aquatic organisms. Exposure to and toxic effects of contaminants can be measured in terms of the biochemical responses of the organisms (i.e. molecular biomarkers). The hepatic biotransformation enzyme cytochrome P4501A (CYP1A) in vertebrates is specifically induced by organic contaminants such as aromatic hydrocarbons, PCBs and dioxins, and is involved in chemical carcinogenesis via catalysis of the covalent binding of organic contaminants to DNA (DNA-adducts). Hepatic CYP1A induction has been used extensively and successfully as a biomarker of organic contaminant exposure in fish. Fewer but equally encouraging studies in fish have used hepatic bulky, hydrophobic DNA-adducts as biomarkers of organic contaminant damage. Much less is known of the situation in marine invertebrates, but a CYPlA-like enzyme with limited inducibility and some potential for biomarker application is indicated. Stimulation of reactive oxygen species (ROS) production is another potential mechanism of organic contaminant-mediated DNA and other damage in aquatic organisms. A combination of antioxidant (enzymes, scavengers) and pro-oxidant (oxidised DNA bases, lipid peroxidation) measurements may have potential as a biomarker of organic contaminant exposure (particularly those chemicals which do not induce CYP1A) and/or oxidative stress, but more studies are required. Both CYP1A- and ROS-mediated toxicity are indicated to result in higher order deleterious effects, including cancer and other aspects of animal fitness.
    Schlagwort(e): Biology ; Environment ; Pollution ; Biomarkers ; Toxicity ; Aquatic organisms ; Biological pollutants ; Enzymes ; Hydrocarbons ; Mutagens ; Pollutants ; Animal diseases ; Fish
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 154-171
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  • 14
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    Effects of stress on the immune system of fish (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5309 | 1256 | 2011-09-29 15:06:43 | 5309 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: The effects of stress on the immune system of various fish species including dab Limanda limanda, flounder Platichthys flesus, sea bass Dicentrarchus labrax and gobies Zosterisessor ophiocephalus, were investigated from laboratory and field experiments, using various assays to measure immunocompetence, correlated with histological and ultrastructural observations. Modulation of the immune system was demonstrated at tissue, cellular and biochemical levels following exposure to various stressors. The spleen somatic index was depressed in dab stressed in the laboratory and gobies collected from polluted sites in the Venice Lagoon. Differential blood cell counts consistently showed an increase in phagocytes and decrease in thrombocytes in fish exposed to various stressors. Phagocytic activity from spleen and kidney adherent cells was stimulated in dab stressed by transportation but depressed in fish exposed to chemical pollutants. Respiratory burst activity in phagocytic cells was also stimulated in stressed dab but depressed in sea bass exposed to cadmium. The results are discussed in relation to current concepts on stress in fish and the regulation of the immune system.
    Schlagwort(e): Biology ; Fisheries ; Limnology ; Bioassays ; Nervous system ; Immunity ; Biological stress ; Marine fish ; Pollution effects ; Kidneys ; Phagocytosis ; Italy ; Porto Marghera
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 111-123
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  • 15
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    Cultural methods of detection for microorganisms: recent advances and successes (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5317 | 1256 | 2011-09-29 15:05:35 | 5317 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Most microbiological methods require culture to allow organisms to recover or to selectively increase, and target organisms are identified by growth on specific agar media. Many cultural methods take several days to complete and even then the results require confirmation. Alternative techniques include the use of chromogenic and fluorogenic substances to identify bacteria as they are growing, selective capture using antibodies after short periods of growth, molecular techniques, and direct staining with or without flow cytometry for enumeration and identification. Future microbiologists may not use culture but depend on the use of specific probes and sophisticated detection systems.
    Schlagwort(e): Engineering ; Limnology ; Pollution ; Water quality ; Microorganisms ; Methodology ; Detection ; Bacteria ; Cultured organisms ; Enzymes ; Immunofluorescence ; Flow cytometry ; Microbiological culture
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 19-27
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  • 16
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    Mussel eggs as indicators of mutagen exposure in coastal and estuarine environments (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5311 | 1256 | 2011-09-29 15:06:25 | 5311 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: The aim of this study was to develop a short-term genotoxicity assay for monitoring the marine environment for mutagens. Based on the developing eggs and embryos of the marine mussel Mytilus edulis, an important pollution indicator species, the test employs the sensitive sister chromatid exchange (SCE) technique as its end-point, and exploits the potential of mussel eggs to accumulate mutagenic pollutants from the surrounding sea water. Mussel eggs take up to 6 months to develop while in the gonad, which provides scope for DNA damage to be accumulated over an extended time interval; chromosome damage is subsequently visualised as SCEs in 2-cell-stage embryos after these have been spawned in the laboratory. Methods which measure biological responses to pollutant exposure are able to integrate all the factors (internal and external) which contribute to the exposure. The new cytogenetic assay allows the effects of adult exposure to be interpreted in cells destined to become part of the next generation.
    Schlagwort(e): Biology ; Environment ; Oceanography ; Marine molluscs ; Eggs ; Coastal zone ; Mutagens ; Indicator species ; Embryos ; Cytogenetics ; Pollution effects ; Bioassays ; Methodology
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 124-137
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  • 17
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    The microbiological quality of water: the nature of the problem (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5315 | 1256 | 2011-09-29 15:06:22 | 5315 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Improvements in methods for the detection and enumeration of microbes in water, particularly the application of techniques of molecular biology, have highlighted shortcomings in the ”standard methods” for assessing water quality. Higher expectations from the consumer and increased publicity associated with pollution incidents can lead to an uncoupling of the cycle which links methodological development with standard-setting and legislation. The new methodology has also highlighted problems within the water cycle, related to the introduction, growth and metabolism of microbes. A greater understanding of the true diversity of the microbial community and the ability to transmit genetic information within aquatic systems ensures that the subject of this symposium and volume provides an ideal forum to discuss the problems encountered by both researcher and practitioner.
    Schlagwort(e): Biology ; Limnology ; Pollution ; Water quality ; Microbiology ; Microorganisms ; Hydrologic cycle ; Methodology ; Bacteria ; Bacterial counters ; Public health ; Microbial contamination ; Primary production ; Fungi ; Cryptosporidium
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 1-10
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  • 18
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    Detection of specific bacteria in water: implications of survival strategy (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5318 | 1256 | 2011-09-29 15:05:37 | 5318 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: It is widely recognised that conventional culture techniques may underestimate true viable bacterial numbers by several orders of magnitude. The basis of this discrepancy is that a culture in or on media of high nutrient concentration is highly selective (either through ”nutrient shock” or failure to provide vital co-factors) and decreases apparent diversity; thus it is unrepresentative of the natural community. In addition, the non-culturable but viable state (NCBV) is a strategy adopted by some bacteria as a response to environmental stress. The basis for the non-culturable state is that cells placed in conditions present in the environment cannot be recultured but can be shown to maintain their viability. Consequently, these cells would not be detected by standard water quality techniques that are based on culture. In the case of pathogens, it may explain outbreaks of disease in populations that have not come into contact with the pathogen. However, the NCBV state is difficult to attribute, due to the failure to distinguish between NCBV and non-viable cells. This article will describe experiences with the fish pathogen Aeromonas salmonicida subsp. salmonicida and the application of molecular techniques for its detection and physiological analysis.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Bacteria ; Bacterial diseases ; Detection ; Methodology ; Molecular biology ; Microbiological culture
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 28-34
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  • 19
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    The impact of molecular biology on assessment of water quality: advantages and limitations of current techniques (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5316 | 1256 | 2011-09-29 15:05:33 | 5316 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: The advent of molecular biology has had a dramatic impact on all aspects of biology, not least applied microbial ecology. Microbiological testing of water has traditionally depended largely on culture techniques. Growing understanding that only a small proportion of microbial species are culturable, and that many microorganisms may attain a viable but non-culturable state, has promoted the development of novel approaches to monitoring pathogens in the environment. This has been paralleled by an increased awareness of the surprising genetic diversity of natural microbial populations. By targeting gene sequences that are specific for particular microorganisms, for example genes that encode diagnostic enzymes, or species-specific domains of conserved genes such as 16S ribosomal RNA coding sequences (rrn genes), the problems of culture can be avoided. Technical developments, notably in the area of in vitro amplification of DNA using the polymerase chain reaction (PCR), now permit routine detection and identification of specific microorganisms, even when present in very low numbers. Although the techniques of molecular biology have provided some very powerful tools for environmental microbiology, it should not be forgotten that these have their own drawbacks and biases in sampling. For example, molecular techniques are dependent on efficient lysis and recovery of nucleic acids from both vegetative forms and spores of microbial species that may differ radically when growing in the laboratory compared with the natural environment. Furthermore, PCR amplification can introduce its own bias depending on the nature of the oligonucleotide primers utilised. However, despite these potential caveats, it seems likely that a molecular biological approach, particularly with its potential for automation, will provide the mainstay of diagnostic technology for the foreseeable future.
    Schlagwort(e): Engineering ; Limnology ; Pollution ; Water quality ; Microbiology ; Microorganisms ; Methodology ; Molecular biology ; DNA ; Polymerase chain reaction ; Detection ; RNA ; Bacteria ; Bacterial diseases
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 11-18
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  • 20
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    Biodiversity in drinking water distribution systems:a brief review (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5323 | 1256 | 2011-09-29 15:05:12 | 5323 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: In drinking water distribution systems, three groups of living organisms are usually found in the biofilm and circulating water: heterotrophic bacteria, free-living protozoa, and macro-invertebrates. Indirect evidence suggests that protozoa grazing in distribution systems can partially eliminate biomass production and accidental microbiological pollution. This paper examines the biodiversit in drinking water distribution systems.
    Schlagwort(e): Biology ; Limnology ; Water supply ; Biodiversity ; Food chains ; Bacteria ; Invertebrate larvae ; Escherichia coli
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    Format: application/pdf
    Format: application/pdf
    Format: 63-70
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  • 21
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    Persistence of viable but non-culturable bacteria during the production and distribution of drinking water (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5322 | 1256 | 2011-09-29 15:05:32 | 5322 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: The direct measurement of in situ respiring bacteria using 5-cyano-2,3-ditolyl tetrazolium chloride (CTC) shows that, especially for Gram-negative bacteria, large numbers of viable but non-culturable (VBNC) bacteria are present in finished water from a conventional water treatment plant, and the regrowth of bacteria along distribution networks can be seen rapidly by using this very sensitive technique. The level of bacterial inactivation with chlorine is much less important than has been previously supposed (based on experiments with non-injured laboratory strains of bacteria and classical culture techniques). Threshold values of VBNC bacteria leaving water treatment plants or regrowing along distribution systems have to be determined for better control of coliform regrowth and health- risks associated with the consumption of drinking water.
    Schlagwort(e): Biology ; Health ; Limnology ; Water supply ; Water treatment ; Bacteria ; Microbiological culture ; Bacterial counters ; Staining ; Growth curves ; France
    Repository-Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 54-62
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  • 22
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    Immunodetection of planktonic algae (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5333 | 1256 | 2011-09-29 15:04:52 | 5333 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Interest in the identification and characterisation of cyanobacteria and dinoflagellates in aquatic environments is increasing rapidly due to the perceived roles of these organisms in primary production and nuisance aspects in terms of water treatment and public health. Techniques for the identification and quantification of these organisms currently are limited, and the application of molecular approaches provides fundamental taxonomic information and techniques of practical value. Antigenic properties of algal cells may be useful taxonomic markers. Immunodetection techniques utilise the specificity of the antibody/antigen association as a probe for recognising and distinguishing between microorganisms according to their cell- surface chemistry. Immunofluorescent detection of unicellular cyanobacteria and dinoflagellates has been studied with success in marine and freshwater ecosystems and a range of techniques and results are presented and discussed. The most recent advances in the study of planktonic algae have come with the application of continuous flow cytometric methods (CFC). Flow cytometry makes use of the autofluorescence properties of the algal cells, which alone can be used to demonstrate their presence and permit their quantification in natural water samples. When used in conjunction with immunolabelling techniques, the potential of CFC analysis is broadened to study the serological/strain composition of plankters in natural populations. Changes in algal strains represented within and between waters over periods of time are reported and discussed, along with the ecological issues thus raised.
    Schlagwort(e): Ecology ; Limnology ; Bacteria ; Methodology ; Algae ; Plankton ; Immunology ; Detection ; Toxicity tests ; Immunofluorescence ; Synechococcus ; Alexandrium tamarens ; Prorocentrum micans
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    Format: application/pdf
    Format: application/pdf
    Format: 92-103
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  • 23
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    The food of coarse fish (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5344 | 1256 | 2011-09-29 15:02:55 | 5344 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-10
    Beschreibung: Remarkably little has been published on the feeding habits of the non-salmonid fishes of British fresh waters. The following report briefly summarizes the results obtained from the examination of the stomach contents of some 2,700 fish, belonging to 19 species, which were obtained during 1939. The results of all examinations of gut contents were analysed, species by species, upon a simple basis of the presence of different types of food. Foodstuffs were divided up into six main categories— fish, molluscs, insects, crustaceans, higher plants together with filamentous algae, and diatoms—and the occurrence of members of any of these categories was recorded for each fish.
    Schlagwort(e): Biology ; Fisheries ; Limnology ; Coarse fish ; Feeding ; Feeding behaviour ; Fishery surveys ; Food organisms ; Gutting ; England
    Repository-Name: AquaDocs
    Materialart: book , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 315-322
    Format: 33
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  • 24
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    Freshwater Biological Association 1929-1979. The first fifty years (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/9627 | 1256 | 2013-10-27 12:24:04 | 9627 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-07
    Beschreibung: Booklet telling the story of the FBA from its founding in 1929 until its Golden Jubilee in 1979. The booklet aimed to produce a readable account of those aspects of freshwater biology that have been among the main themes of the Association's research, as well as some aspects of its history and the philosophy guiding its foundation. The publication includes many images of the FBA's work and history as well as images and illustrations on lake ecology and applied science.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater scientists ; Freshwater sciences ; Limnology ; Organisations
    Repository-Name: AquaDocs
    Materialart: book , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 39
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  • 25
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    Actinomycetes and actinophage in fresh water (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5161 | 3949 | 2011-09-29 15:17:51 | 5161 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: Actinomycetes are a group of micro-organisms which lie, in classification, half-way between the fungi and the bacteria. They may be isolated from the plating of leaf washings, water samples and mud dilutions on to nutrient agar (with incorporated actidione to eliminate fungi). The predominant genus varied with the source of the sample. An attempt was also made to isolate the phages of some Actinomycetes. A search was made in the typical environments of the host, for the virus. In this way actinophage were also isolated; and shown to be capable of being transmitted from one host strain to another host strain within 1 sp or from one host to another within 1 genus; i.e. polyvalent.
    Schlagwort(e): Biology ; Ecology ; Environment ; Bacteria ; Fungi ; Microbiological culture ; Viruses ; Actinomycetes ; Annual report
    Repository-Name: AquaDocs
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  • 26
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    The production of algae growing on gravel in a chalk-stream (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5160 | 3949 | 2011-09-29 15:19:35 | 5160 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: Epilithic algae, ie that growing on the surface of stones, was studied as part of the work on the energy flow of the chalk-stream ecosystem, by the River Laboratory. The study area was on Bere Stream and 2 neighbouring streams. The algal biomass was estimated from analysis of chlorophyll a. In Bere Stream the peak chlorophyll a cover occurred in April, while in the neighbouring streams, which have considerably lower nutrient levels, there was on peak. Assuming that 2% of a diatoms dry wt is chlorophyll a, then even in mid-April the biomass of epilithic algae amounted to no more than 15 g dry wt m Super(-2) of exposed gravel. Annual production was calculated to be 〉 15 times greater than biomass. The estimation of net primary production is always difficult for benthic floras and comparisons are especially difficult when different methods are used. But these figures contrast sharply with those for Ranunculus (water crowfoot) which has a ratio of annual production to maximal seasonal biomass of 1:16. The accumulation of algal biomass is apparently being prevented. Some organic matter may be excreted; some algae will be washed off the bed of the stream by current and grazing by herbivorous invertebrates will also tend to prevent algal accumulation.
    Schlagwort(e): Biology ; Ecology ; Environment ; Phytoplankton ; Algae ; England ; Dorset ; Annual report
    Repository-Name: AquaDocs
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  • 27
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    Year class strengths of perch and pike in Windermere (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5158 | 3949 | 2011-09-29 15:19:31 | 5158 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-08
    Beschreibung: The pike (Esox lucius) year classes are more stable than those of the perch (Perca fluviatilis), and have been shown to be closely correlated with temp conditions during the first few months of life. The perch year class strengths have been more variable; for success they require the presence of several positive conditions and the absence of many adverse conditions which could cause failure, a favourable combination of circumstances rarely occurs. The conclusions refer only to Windermere from 1941-1964.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Age composition ; Esox lucius ; Perca fluviatilis ; England ; Lake District ; Annual report
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  • 28
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    The ecology of the Gussage, a lined winterbourne (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5165 | 3949 | 2011-09-29 15:18:21 | 5165 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-08
    Beschreibung: The Gussage, a Dorset winterhourne (intermittent chalk stream), has been used to convey water from a compensation borehole to the River Allen to supplement its flow to meet demand for water. Sections of the Gussage have been lined with chalk, butyl sheeting or polythene sheeting to prevent water loss through the porous bed. The effects of this major environmental modification associated with these abstraction practices in the winterbourne catchments have been studied in the Gussage system since 1973. To compensate for the lack of adequate pre-lining data, comparative studies have been made on 3 small unlined chalk streams of varying flow regimes, ie. the Crichel (a winterbourne), the North Winterbourne and the Tarrant (permanent discharge in the reaches studies). The distribution of macrophytes and invertebrates in winterbournes are compared with that in natural and artificial permanent streams. Statistical analysis showed samples from the winterbourne sites and the unmodified permanent stream sites are quite distinct, despite the fact that no samples were taken from winterbourne sites during the dry phase. This emphasizes the differences between the fauna of an intermittent and a permanent stream and suggests that alteration of the flow regime could be a significant factor. Where flow regime has been altered, as in the Gussage downstream of the borehole, the samples occupy an intermediate position. Within this group of modified sites there is no apparent gross difference between the invertebrates of lined or unlined reaches.
    Schlagwort(e): Biology ; Ecology ; Environment ; Ecological distribution ; Ecology ; Watersheds ; England ; Dorset ; Annual report
    Repository-Name: AquaDocs
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  • 29
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    Physiological aspects of the life cycle of the river lamprey, Lampetra fluviatilis L (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5172 | 3949 | 2011-09-29 15:18:50 | 5172 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-08
    Beschreibung: The life cycle of the river lamprey, L. fluviatilis, is reviewed. The larval lamprey, or ammocoete, is a blind, filter-feeding animal, which normally lies concealed in the silt deposits of streams and rivers. After a period of 3-5 years in fresh water the ammocoete undergoes a metamorphosis in the summer months into a sexually immature, non-feeding stage known as the macrophthalia, which is active. This stage migrates downstream in late winter. It adopts a parasitic existence, in intertidal areas. After 18 months it returns to spawn in fresh water, after a final freshwater stage lasting up to 9 months. The river lamprey dies within a few days after the spawning period of 3-4 weeks, and none survive to spawn the following year.
    Schlagwort(e): Biology ; Ecology ; Fisheries ; Life cycle ; Physiology ; Lampetra fluviatilis ; Annual report
    Repository-Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 40-46
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  • 30
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    Limnetic crustaceans in Esthwaite water and adjacent lakes (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5175 | 3949 | 2011-09-29 15:19:19 | 5175 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Limnetic crustaceans (i.e. those which live in the open water of lakes and ponds) were investigated in Esthwaite water and adjacent lakes. These are represented by two groups, Copepoda and Cladocera.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Zooplankton ; Lakes ; Cladocera ; England ; Esthwaite Water ; Annual report
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    Format: application/pdf
    Format: application/pdf
    Format: 70-73
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  • 31
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    Bacterial production of nitrate in aquatic systems: progress report. Nitrate-loss processes in raw water (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5126 | 1256 | 2011-09-29 15:23:16 | 5126 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: This short interim progress report builds on previous progress reports which have described the quantification of the process both within and between lakes of different degrees of eutrophication. These data indicated that slight changes in methodology, particularly when investigating sediment deposits, could grossly affect the measured activity. The aim of the present research was an attempt to rationalize these differences. If this could be achieved it would enable meaningful interpretation of published data obtained using different methods and therefore enlarge the available database. In addition some observations have been made on the production of nitrite by Grasmere profundal sediment slurries sampled during the circulation period.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater lakes ; Nitrification ; Sedimentation ; Ammonia ; Slurries ; England ; Grasmere Lake
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 2
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  • 32
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    The changing chemical composition of chalk streams and rivers (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5157 | 3949 | 2011-09-29 15:19:58 | 5157 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-08
    Beschreibung: The area studied was the River Frome system below Dorchester. The main river has its origins mainly in chalk springs, although some of its tributaries have surface run-off from farm lands and heath-lands. Thus the chemistry of the river is affected by changes in land practice and differences in the geology of the catchment area. Regular chemical analysis of chalk waters started at the River Laboratory in 1964, Regular weekly analyses have been carried out since 1965 at Bere Stream (a small chalk stream) and the River Frome (a large chalk stream); also single samples have been analysed to provide preliminary information. In 1970-71 an attempt was made to discover the contribution each main source made to the flow and chemical composition of the River Frome. Results of these investigations are presented in the paper.
    Schlagwort(e): Chemistry ; Environment ; Chemical analysis ; Chemical composition ; Rivers ; Stream flow ; Annual report ; England ; Dorset
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  • 33
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    Feeding, metabolism and growth of brown trout (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5170 | 3949 | 2011-09-29 15:18:46 | 5170 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-08
    Beschreibung: A short review of the work carried out by the FBA on feeding and growth of brown trout is presented in this article. Since the amount of work done on this subject is quite extensive, this review has to be very selective. The work has been previously described in 10 papers, 9 of which were written by the author (J.M.Elliott) and 1 written by the author and W.Davison- references for these, and the pioneer work of M.E.Brown and F.T.K.Pentelow, are supplied at the end of the article.
    Schlagwort(e): Biology ; Ecology ; Feeding ; Taxonomy ; Metabolism ; Salmo trutta ; Annual report
    Repository-Name: AquaDocs
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    Format: application/pdf
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  • 34
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    Geochemistry of lipids in lacustrine sediments (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5171 | 3949 | 2011-09-29 15:18:48 | 5171 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-08
    Beschreibung: An explanation of the basic premises of the subject and its terminology is given. The article then outlines aspects of research on the organic material found in lacustrine sediments, and the analytical methods involved.
    Schlagwort(e): Chemistry ; Earth Sciences ; Diagenesis ; Freshwater lakes ; Geochemistry ; Lipids ; Sediment analysis ; Annual report
    Repository-Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 45-56
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  • 35
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    Aspects of the biology of coarse fish in the Dorset Stour (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5178 | 3949 | 2011-09-29 15:16:57 | 5178 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Some of the results from an investigation of five species of coarse fish, in the Stour River, carried out from 1968-1978 are presented in this article. The species involved were: Rutilus rutilis, Leuciscus leuciscus, L. cephalus, Esox lucius and Perca fluviatilis : which are of particular interest to anglers. Although these species show some similarities, as in the shape of the annual and seasonal growth curves, in most other respects each species occupies a distinct niche in the ecosystem and has a life-history strategy peculiar to itself. In this study only 5 species were investigated. When all the species present are considered the relationships or diversities suggested here will therefore be made far more complex.
    Schlagwort(e): Biology ; Ecology ; Life history ; Coarse fish ; Rutilus rutilus ; Leuciscus leuciscus ; Leuciscus cephalus ; Esox lucius ; Perca fluviatilis ; England ; River Stour ; Annual report
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    Format: application/pdf
    Format: application/pdf
    Format: 51-59
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  • 36
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    Eggs of Ephemeroptera (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5182 | 3949 | 2011-09-29 15:17:19 | 5182 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Information on fecundity, oviposition behaviour, egg hatching, and parthenogenetic development of Ephemeroptera is reviewed and summarized.
    Schlagwort(e): Biology ; Ecology ; Reproduction (biology) ; Ephemeroptera ; Annual report
    Repository-Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 41-52
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  • 37
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    Experiments using an artificial stream to investigate the seasonal growth of chalk-stream algae (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5190 | 3949 | 2011-09-29 15:14:57 | 5190 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Research into the production ecology of chalk streams using a large artificial recirculating stream is described. Physical chemical processes including calcium and inorganic phosphate levels, and exchange of gaseous carbon dioxide in both a simple closed system and a circulating system with gravel substrate have been monitored in both light and dark conditions. Further experiments were concerned with the seasonal changes in algal growth over the gravel substrate with constant water velocities and replenishment. The algal population, composed mainly of the diatoms Achnanthes minutissima, Meridion circulare, Nitzschia fonticola and Synedra ulna reached a peak in mid May and declined rapidly during June. Concentrations of phosphate phosphorus fell as the diatoms grew but was not thought to limit growth. Silicate concentrations followed the diatom cycle closely but never fell below 0.8 mg/l Si. It is possible that one of the nutrients may have been limiting the rate of growth due to steep diffusion gradients through the algal mat. In the last summer and autumn a hard calcareous crust composed of the green alga Gongrosira incrustans and the blue green alga Homeothrix varians , developed. The channel stream is compared with the natural conditions found in chalk streams.
    Schlagwort(e): Biology ; Ecology ; Algae ; Fresh water ; Growth ; Phosphates ; Population dynamics ; Seasonal variations ; Silicates ; Achnanthes minutissima ; Meridion circulare ; Synedra ulna ; Annual report
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    Format: application/pdf
    Format: application/pdf
    Format: 63-75
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  • 38
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    Monitoring the trophic status of reservoirs (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5206 | 1256 | 2011-09-29 15:16:23 | 5206 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: The current situation of regional, rather' than national, problems of eutrophication in standing waters has been widely aired in recent reports. A reliable, quantitative data base is a prerequisite to future trend monitoring, a concensus view of those reports. The objective of this report is to establish requirements, methodology and a minimal data set for nutrient and algae status in water supply reservoirs in England which may be used as a protocol for future trend monitoring.A pilot study has been carried out to assess the relative merits of different sampling strategies, the choice of which has major implications for the cost of sample collection. This short report suggests that consider the possibility of designating a few sites as ”baseline sites” at which detailed changes in trophic status as monitored by the more labour-intensive parameters would be collected on a regular, long term basis to help in the interpretation of the low cost survey results.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater lakes ; Eutrophication ; Monitoring ; Surveying ; England ; Grasmere Lake
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    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 2
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  • 39
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    Nitrates - loss processes in raw water (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5208 | 1256 | 2011-09-29 15:16:34 | 5208 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: This project investigated the production of nitrate (nitrification) by bacteria in lakes. The work was undertaken as nitrification is a key process in the nitrogen cycle and previous estimates of rates of nitrification were unreliable. When different methods were used to estimate rates of nitrification within sediment deposits different results were obtained. Investigation' of specific aspects of these methodologies has allowed some rationalization of these observations and also enabled comparisons of previously published data which, beforehand, was not possible. However, it was not clear which methods gave the most reliable rate estimates. Calculation of a nitrate budget for Grasmere lake indicated that the use of methods which involved the mixing of surface sediments (and therefore disrupted preformed nutrient gradients) overestimated the rate of nitrification. The study concludes that slight changes in the method used to prepare sediment slurries can result in large changes, in the measured nitrifying activity. This makes comparisons between studies, using different methods, extremely difficult. Methods to study sediment nitrification processes which do not disrupt preformed substrate gradients within the sediment provide the most reliable rate estimates.
    Schlagwort(e): Ecology ; Limnology ; Bacteria ; Nitrification ; Freshwater lakes ; Sediment samples ; Slurries ; Seasonal variations ; Methodology ; England ; Grasmere Lake
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 47
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  • 40
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    Impact of watercress cultivation on river water quality: progress report for the period, January - December 1987 (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5210 | 1256 | 2011-09-29 15:16:44 | 5210 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: The objective of this short project progress report is to investigate the possible water quality implications of modern watercress growing practices. Chalk receiving watercourses are usually of high supply, amenity, game fishing and fish farming value. Any headwater pollution load, therefore, needs characterising and quantifying. Two sites of watercress farming were studied in 1986-87 and nutrient levels examined. Different approaches of watercress farmers in Dorset and Hampshire are summarised.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Rivers ; Aquaculture ; Aquaculture enterprises ; Aquaculture techniques ; Nutrients (mineral) ; England
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 3
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  • 41
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    Freshwater survey of the ditches around Hinkley Point Power Station, 20 June 1985 (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5213 | 1256 | 2011-09-29 15:14:36 | 5213 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Sampling was concentrated on the North Moor region and the series of ditches which drained this area to the Bristol Channel. Although most ditches were not deep the mud substratum precluded sampling from within the habitat. All samples were taken with a pond net from the banks. Efforts were made to sample each part of the habitat although in some ditches the macrophyte growth was so intense as to make sampling difficult particularly of the sediments. Organisms were identified on the 10 sampling sites.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Trenching ; Biological sampling ; Identification ; Biological surveys ; England ; Somerset
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 53
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  • 42
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    Automatic identification and enumeration of algae (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5207 | 1256 | 2011-09-29 15:16:29 | 5207 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: A good understanding of the population dynamics of algal communities is vital in many ecological and pollution studies of freshwater and oceanic systems. Present methods require manual counting and identification of algae and can take up to 90 min to obtain a statistically reliable count on a complex population. Several alternative techniques to accelerate the process have been tried on marine samples but none have been completely successful because insufficient effort has been put into verifying the technique before field trials. The objective of the present study has been to assess the potential of in vivo fluorescence of algal pigments as a means of automatically identifying algae. For this work total fluorescence spectroscopy was chosen as the observation technique.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Algae ; Identification ; Methodology ; Fluorescence ; Fluorescence spectroscopy ; England
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 31
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  • 43
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    The effects of environmental stress on the physiology of growth in rainbow trout, Salmo gairderi Richardson (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5211 | 1256 | 2011-09-29 15:14:56 | 5211 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: There is little doubt that both mammalian and teleost growth hormones can accelerate growth and increase food conversion efficiency in all commonly-reared species of salmonid fish. In those vertebrates that have been closely studied (predominantly mammals), the pituitary hormone somatotropin (GH or growth hormone) is a prime determinant of somatic growth. The hormone stimulates protein biosynthesis and tissue growth, enhances lipid utilization and lipid release from the adipose tissues (a protein-sparing effect) and suppresses the peripheral utilization of glucose. The present study is a prerequisite for future work on growth hormone physiology in salmonids and should contribute to our understanding of the mechanisms of growth suppression in stressed fish. Plasma growth hormone (GH) levels were measured in rainbow trout using a radioimmunoassay developed against chinook salmon growth hormone.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Salmon fisheries ; Freshwater fish ; Hormones ; Blood ; Growth ; England ; Oncorhynchus mykiss
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 47
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  • 44
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    Joint research project on the aquatic ecotoxicity of organo-aluminium: Chemical reactions. First interim report (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5225 | 1256 | 2011-09-29 15:12:36 | 5225 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: The overall goal of the joint research project is to relate the chemical reactions involved in the formation of organo-aluminium complexes under acid conditions to their toxic effects on the physiology of aquatic organisms. Finally, this research is intended to predict toxic effects arising from acidity and aluminium under varying environmental conditions. This interim report examines the chemical modelling of ion-binding by humic substances where a computer model has been developed and is being tested using field data, and conditions required for the precipitation of aluminium in surface waters.
    Schlagwort(e): Chemistry ; Limnology ; Pollution ; Modelling ; Models ; Humic acids ; Surface water ; Aluminium compounds ; Aluminium ; Ions ; Toxicity ; England ; Duddon River
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 26
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  • 45
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    Analysis of soils and sediments for organic pollutants (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5224 | 1256 | 2011-09-29 15:12:34 | 5224 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: 20 samples of soil or sediment (7 of which were predominantly sand) from various locations were received for analysis of their content of organic pollutants. These analyses were performed using a capillary column gas chromatograph equipped with an electron impact (E.I.) mass spectrometer as detector and using computerised data storage. In addition to the target compounds, the full scan data were examined to determine the composition of natural organic products and a series of diagnostic fragment ions was used to search for additional anthropogenic products. Organic-rich environmental samples are notoriously difficult to analyse for pollutant organics owing to the presence of high concentrations of many natural organic compounds. A single procedure for extraction and clean-up was adopted. It was designed for chlorinated aliphatic and aromatic hydrocarbons and other pesticides containing acidic functional groups and was based on published methods for the determination of organic pollutants in soils and sediments. 4 soils and 2 sands showed levels of one or two groups of PCBs slightly in excess of the detection limit, one sample showed a similar level of 2,4-D and 3 samples contained dieldrin at or just above the detection limit.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Organic matter ; Methodology ; Dioxins ; Sediment sampling ; Hydrocarbon analysis ; Hydrocarbons ; England
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 13
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  • 46
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    Decomposition in lake sediments: bacterial action and interaction (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5239 | 3949 | 2011-09-29 15:13:47 | 5239 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-06-24
    Beschreibung: This review discusses the processes involved in the decomposition of organic carbon derived initially from structural components of algae and other primary producers. It describes how groups of bacteria interact in time and space in a eutrophic lake. The relative importance of anaerobic and aerobic processes are discussed. The bulk of decomposition occurs within the sediment. The role of bacteria in the nitrogen cycle and the iron cycle, and in sulphate reduction and methanogenesis as the terminal metabolism of organic carbon are described.
    Schlagwort(e): Biology ; Chemistry ; Anaerobic bacteria ; Bacteria ; Biodegradation ; Carbon cycle ; Eutrophic lakes ; Fresh water ; Geochemical cycle ; Iron ; Manganese ; Nitrates ; Nitrogen cycle ; Organic carbon ; Oxygen consumption ; Partical size ; Sedimentation ; Sulphates ; Sulphur ; Annual report
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 31-44
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  • 47
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    Water mites: predators and parasites (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5240 | 3949 | 2011-09-29 15:13:51 | 5240 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: The majority of water mites found in freshwater belong to the Hydrachnellae, a group which exhibit striking morphological diversity. This paper reviews work on the structure, morphology and taxonomy. The role of water mites as predators, their life history and their parasitic associations with aquatic insect or freshwater mollusc hosts is discussed along with the distribution of water mites in the British Isles.
    Schlagwort(e): Biology ; Ecology ; Animal morphology ; Distribution records ; Fresh water ; Hosts ; Larvae ; Life cycle ; Parasites ; Predators ; Taxonomy ; Acari ; Arachnida ; Hydrachnellae ; British Isles ; Annual report
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 45-59
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  • 48
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    The classification and prediction of macroinvertebrate communities in British rivers (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5242 | 3949 | 2011-09-29 15:13:57 | 5242 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: This article describes the progress of the River Communities Project which commenced in 1977. This project aimed to develop a sensitive and practical system for river site classification using macroinvertebrates as an objective means of appraising the status of British rivers. The relationship between physical and chemical features of sites and their biological communities were examined. Sampling was undertaken on 41 British rivers. Ordination techniques were used to analyze data and the sites were classified into 16 groups using multiple discrimination analysis. The potential for using the environmental data to predict to which group a site belonged and the fauna likely to be present was investigated.
    Schlagwort(e): Biology ; Ecology ; Aquatic communities ; Check lists ; Classification Systems ; Environmental factors ; Fresh water ; Rivers ; Sampling ; Invertebrata ; Annual report
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 80-93
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  • 49
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    'The highly nervous system of the English Lakes': aquatic ecosystem sensitivity to external changes, as demonstrated by diatoms. (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5241 | 3949 | 2011-09-29 15:13:56 | 5241 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: The author reviews the stratigraphic diatom profile of Cumbrian lakes since the last glaciation. Knowledge of both present and previous interglacials suggests that a natural cycle of change is imposed on all lakes. The nature of inwashed material is dependant on climatic and natural soilcycles and this affects the water quality and sensitive aquatic biota. Anthropogenic effects are superimposed upon this with forest clearance and pollution. Whilst some Cumbrian diatom profiles extend over the entire post glacial, others cover only detailed sections relating to particular problems. Causes and effect of recent changes in lakes can be studied using indicator species but palaeocology contributes greatly to understanding of long term changes.
    Schlagwort(e): Biology ; Limnology ; Biostratigraphy ; Climatic changes ; Colonization ; Cores ; Environmental effects ; Eutrophication ; Fossil diatoms ; Historical account ; Land use ; pH ; Palynology ; Sediment analysis ; Sedimentology ; Water quality ; Lake District ; Cumbria ; Annual report
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 60-79
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  • 50
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    Turbidity and plant growth in large slow-flowing lowland rivers. Progress Report: March 1989 (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5245 | 1256 | 2011-09-29 15:14:09 | 5245 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: The River Great Ouse is a highly managed large lowland river in eastern England. It drains rich arable land in the Midlands and Eastern England and over the years nutrient concentrations have increased and there is a general perception that the clarity of the water has decreased. The main river channels have been dredged a number of times partly for flood control reasons but also for recreational boating and navigation activities. The period covered by this first report has been used to develop specific methodology and instrumentation for measuring turbidity, suspended solids and underwater irradiance for conditions found in the middle abd lower reaches of the River Great Ouse. Sampling strategies have been developed and an extensive sampling programme is now underway covering phytoplankton, suspended solids and turbidity in relation to algal epiphyte growth on underwater macrophytes. Preliminary data are presented relating light levels on the river bed to the river bed profile, turbidity levels and phytoplankton chlorophyll a concentrations. Studies are underway concerning the extent of macrophyte cover and periphyton densities.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Rivers ; Seasonal variations ; Turbidity ; Aquatic pl ; England ; Great Ouse River ; Periphyton ; Phytoplankton ; Chlorophylls
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 12
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  • 51
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    Africa: the FBA connection (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5246 | 3949 | 2011-09-29 15:08:18 | 5246 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Since its inception in the 1930's the Freshwater Biological Association at Windermere, England has been involved in research on African lakes and rivers. Research has included general and multidisciplinary surveys of many lakes including Lake Victoria, Lake Tanganyika, Lake Nyasa (Lake Malawi) and Lake George. The hydrobiology of the River Nile has also been studied. Research into physical and chemical limnology, phytoplankton ecology and primary productivity, invertebrate biology, freshwater fish and fisheries.
    Schlagwort(e): Biology ; Fisheries ; Limnology ; Algae ; Chemical limnology ; Fisheries ; Freshwater fish ; Freshwater lakes ; Hydrobiology ; Invertebrate zoology ; Parasitology ; Physical limnology ; Phytoplankton ; Primary production ; Research programs ; Rivers ; Tropical lakes ; Cichlidae ; Crustacea ; Invertebrata ; Mollusca ; Pisces ; Africa ; River Nile ; Lake Victoria ; Annual report
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 57-82
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  • 52
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    Physiological ecology of the ciliated protozoon Loxodes (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5244 | 3949 | 2011-09-29 15:14:07 | 5244 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Loxodes faces special problems in living close to the oxic-anoxic boundary. In tightly-stratified ponds like Priest Pot its optimum environment may be quite narrow and it can be displaced by the slightest turbulence. Loxodes cannot sense an O sub(2) gradient directly but its ability to perceive gravity allows it to make relatively long vertical migrations. It is also sensitive to light and oxygen and it uses these environmental cues to modulate the parameters of its random motility: in the dark, it aggregates at a low O sub(2) tension and in bright light it aggregates in anoxic water. The oxic-anoxic boundary is also a zone where O sub(2) may be a scarce and transient resource, but Loxodes) can switch to nitrate respiration and exploit the pool of nitrate that often exists close to the base of the oxycline.
    Schlagwort(e): Biology ; Ecology ; Anoxic conditions ; Dissolved oxygen ; Ecophysiology ; Freshwater lakes ; Light effects ; Physiochemical properties ; Turbulence ; Vertical migrations ; Loxodes ; England ; Cumbria ; Annual report
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 33-56
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  • 53
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    Biological and climatic influences on the dace Leuciscus leuciscus in a southern chalk-stream (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5247 | 3949 | 2011-09-29 15:08:19 | 5247 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: The dace, Leuciscus leuciscus (L.) is an important cyprinid in terms of population biomass in chalk streams of southern England. Dace recruitment has been shown to vary widely from year to year and it is thought that this variation is largely as a result of the influence of abiotic factors, chiefly water temperature. From 1968 to 1981 there was a thirteen-fold difference in the year class structure index between the minimum index (0.25 in 1972) and the maximum (3.21 in 1976). The problems of such variation, especially those that could ensue from a succession of poor year-classes, are offset by the spread of reproductive effort by each female over several years.
    Schlagwort(e): Biology ; Chemistry ; Fisheries ; Abiotic factors ; Age composition ; Annual variations ; Climate ; Fecundity ; Fish eggs ; Fish larvae ; Freshwater fish ; Life history ; Mortality ; Population dynamics ; Predation ; Recruitment ; Sexual reproduction ; Survivial ; Water temperature ; Cyprinidae ; Leuciscus leuciscus ; England ; Dorset ; Chalk streams ; Annual report
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 83-96
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  • 54
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    Experimental design in fluvial ichthyology: getting the most for your money (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5248 | 3949 | 2011-09-29 15:08:21 | 5248 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: In field biology, cost efficiency is an essential element of experimental design, with ramifications extending well beyond the basic monetary considerations associated with labour and equipment acquisition. Current economic constraints often require scientists to undertake many technical, secretarial and managerial tasks in addition to those associated with data collection, analysis, interpretation and publication. Because the time spent to process material in the laboratory can rarely be shortened without compromising the integrity of the results, it is imperative that field experiments be well-organised, addressing as many aspects of the problem as possible during the same sampling excursion. The sampling strategy employed should provide a maximum of good field data with a minimum cost of time and effort.
    Schlagwort(e): Biology ; Management ; Costs ; Efficency ; Experimental research ; Ichthyology ; Annual report
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 68-87
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  • 55
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    Analysis and adsorption of phosalone on aquatic sediment (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5257 | 1256 | 2011-09-29 15:09:23 | 5257 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Phosalone is a non systematic, wide spectrum organophosphate pesticide which was discovered in 1961 in the laboratories of the Societe des Usines Chimique Rhone-Poulenc in France. It has been approved for commercial use since 1964 in France, in Australia since 1966, in the United Kingdom in 1967 and in many other countries including Japan, Egypt, USSR and the USA. This study provides a full literature review on all aspects of phosalone including its physical, biological and chemical characteristics, and analytical methods of analysis with particular reference to soils/sediments. Furthermore, it aims to develop a method for the determintion of phosalone in aquatic sediments and to determine the adsorption of phosalone onto kaolinite.
    Schlagwort(e): Chemistry ; Limnology ; Pollution ; Insecticides ; Metabolism ; Toxicity ; Biodegradation ; Adsorption
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 54
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  • 56
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    Joint Anglo-Soviet biological surveillance exercise on River Dnieper (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5260 | 1256 | 2011-09-29 15:09:28 | 5260 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: As one part of an on-going programme concerned with environmental protection as provided for under the terms of a UK/USSR Joint Environmental Protection Agreement signed in London, 21 May 1974, a seminar — ”The elaboration of the scientific basis for monitoring the quality of surface water by hydrobiological indices” was held at Valdai in Russia 12—14 July, 1976. As a continuation of this theme it was agreed that delegations of hydrobiologists from each side should carry out reciprocal visits to carry out comparative field tests on selected systems of biological surveillance in use in the respective countries. In May 1978 a team of British hydrobiologists visited the USSR, under the auspices of the Department of Environment, to carry out joint exercises on the River Dnieper and some tributaries. This paper reports the results of selected methods used by the British side when applied to the conditions found in the River Dnieper.
    Beschreibung: UK Hydrobiologists' Report - Pollution Report No.8
    Schlagwort(e): Biology ; Ecology ; Limnology ; Sampling ; Samplers ; Methodology ; Rivers ; International cooperation ; Water reservoirs ; Ukraine ; Dnieper River
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 21
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  • 57
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    Description of sampling stations, methods of benthic sampling and biological water quality assessment; with some consideration of the influence of sample variation on the assessment values obtained (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5258 | 1256 | 2011-09-29 15:09:25 | 5258 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: The first bilateral study of methods of biological sampling and biological methods of water quality assessment took place during June 1977 on selected sampling sites in the catchment of the River Trent (UK). The study was arranged in accordance with the protocol established by the joint working group responsible for the Anglo-Soviet Environmental Agreement. The main purpose of the bilateral study in Nottingham was for some of the methods of sampling and biological assessment used by UK biologists to be demonstrated to their Soviet counterparts and for the Soviet biologists to have the opportunity to test these methods at first hand in order to judge the potential of any of these methods for use within the Soviet Union. This paper is concerned with the nine river stations in the Trent catchment.
    Beschreibung: Bilateral study of methods 1 - Pollution Report No.8
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Sampling ; Statistical sampling ; Samplers ; International cooperation ; Methodology ; England ; Trent River
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 65
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  • 58
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    Bassenthwaite Lake: a general assessment of environmental and biological features and their susceptibility to change (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5254 | 1256 | 2011-09-29 15:09:03 | 5254 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Bassenthwaite (Lake) is one of the larger Cumbrian lakes, certainly one of the most distinctive, and of considerable conservation and amenity value. Although its shores lack sizeable settlements, its main inflow receives sewage effluent from a major tourist centre (Keswick) and is subject to episodic floods. These influences, the growing development of leisure activities at the lake (e.g. sailing, time-share units), and recent road-construction, have led to past appraisals of ecological impacts and lake management. The lake has not been the subject of intense and long-term ecological study, but much scattered information exists that is relevant to future management decisions. In the present Report, commissioned by North West Water, such information - published and unpublished - is surveyed. Especial attention is given to evidence bearing on susceptibility to change, affecting the lake environment and its biota or species of conservation interest. Extensive use has been made of the results of a recent (1986-7) seasonal survey by the FBA.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater lakes ; Freshwater ecology ; Limnology ; Hydrology ; Phytoplankton ; Zooplankton ; Freshwater fish ; Benthos ; England ; Bassenthwaite Lake
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 93
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  • 59
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    Genetic engineering of microorganisms: free release into the environment (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5250 | 3949 | 2020-08-23 05:42:00 | 5250 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Genetic engineering now makes possible the insertion of DNA from many organisms into other prokaryotic, eukaryotic and viral hosts. This technology has been used to construct a variety of such genetically engineered microorganisms (GEMs). The possibility of accidental or deliberate release of GEMs into the natural environment has recently raised much public concern. The prospect of deliberate release of these microorganisms has prompted an increased need to understand the processes of survival, expression, transfer and rearrangement of recombinant DNA molecules in microbial communities. The methodology which is being developed to investigate these processes will greatly enhance our ability to study microbial population ecology.
    Schlagwort(e): Biology ; Ecology ; Environment ; Aquatic environment ; Genetics ; Microorganisms ; England ; Annual report
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 91-107
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  • 60
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    The choice of a suitable sampler for benthic macroinvertebrates in deep rivers (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5261 | 1256 | 2011-09-29 15:09:45 | 5261 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Both chemical and biological methods are used to assess the water quality of rivers. Many standard physical and chemical methods are now established, but biological procedures of comparable accuracy and versatility are still lacking. This is unfortunate because the biological assessment of water quality has several advantages over physical and chemical analyses. Several groups of organisms have been used to assess water quality in rivers and these include Bacteria, Protozoa, Algae, macrophytes, macroinvertebrates and fish. Hellawell (1978) provides an excellent review of the advantages and disadvantages of these groups, and concludes that macroinvertebrates are the most useful for monitoring water quality. Although macroinvertebrates are relatively easy to sample in shallow water (depth 〈 1m), quantitative sampling poses more problems than qualitative sampling because a large number of replicate sampling units are usually required for accurate estimates of numbers or biomass per unit area. Both qualitative and quantitative sampling are difficult in deep water (depth 〉 1m). The present paper first considers different types of samplers with emphasis on immediate samplers, and then discusses some problems in choosing a suitable sampler for benthic macroinvertebrates in deep rivers.
    Schlagwort(e): Ecology ; Engineering ; Limnology ; Sampling ; Samplers ; Methodology ; Rivers ; Invertebrate larvae ; Benthos ; Benthic environment
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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  • 61
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    A general assessment of environmental and biological features of Windermere and their susceptibility to change (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5255 | 1256 | 2011-09-29 15:09:19 | 5255 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Bassenthwaite (Lake) is one of the larger Cumbrian lakes, certainly one of the most distinctive, and of considerable conservation and amenity value. Although its shores lack sizeable settlements, its main inflow receives sewage effluent from a major tourist centre (Keswick) and is subject to episodic floods. These influences, the growing development of leisure activities at the lake (e.g. sailing, time-share units), and recent road-construction, have led to past appraisals of ecological impacts and lake management. The lake has not been the subject of intense and long-term ecological study, but much scattered information exists that is relevant to future management decisions. In the present Report, commissioned by North West Water, such information - published and unpublished - is surveyed. Especial attention is given to evidence bearing on susceptibility to change, affecting the lake environment and its biota or species of conservation interest. Extensive use has been made of the results of a recent (1986-7) seasonal survey by the FBA.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater lakes ; Freshwater ecology ; Limnology ; Hydrology ; Phytoplankton ; Zooplankton ; Freshwater fish ; Sediments ; England ; Windermere Lake
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 150
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  • 62
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    Methods of determining the quality of water using the functional characteristics of algae (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5267 | 1256 | 2011-09-29 15:10:12 | 5267 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: In the study of questions relating to the quality of raw water and the biological produc- tivity of water bodies algal indicators have an important place. Despite the importance of these functional indicators in determining the quality of water and the nature of the production processes as a basis for preserving the ecological equilibrium of aquatic ecosystems, their use in the system of hydrobiological methods of monitoring the quality of surface water has not received proper consideration. This paper aims to analyse the matter and the possibl use of functional algal criteria in the system for the biological monitoring of aquatic objects and also to give some results in using these criteria.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Methodology ; Ecosystem management ; Water quality control ; Algal culture ; Tests ; Test organisms
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 13
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  • 63
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    Polyphemus pediculus (L.) (Cladocera) as a possible indicator of water quality (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5268 | 1256 | 2011-09-29 15:10:26 | 5268 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Usually stenobiotic species are used as hydrobiological indicators of the degree of pollution in natural waters. Cladocera are eurybiotic organisms, therefore their role as specific indicators of the water quality is considered to be insignificant. However, considering new methods Cladocera at present are more and more often used as indicators of oligo- and mesosaprobic waters as well as of the presence of considerable amounts of easily degradable organic matter. Work over many years on the biology of Polyphemus pediculus, this striking representative of the order Cladocera, convinced the author of the possibility of using this species not only as an indicator of water purity but also for the estimation of the degree of water pollution as well as of water characteristics such as colour, turbidity, oxgen content and chemical composition. P. pediculus is one of the most common and abundant species of planktonic crustaceans in shallow waters of reservoirs, rivers, lakes, ponds and temporary water bodies.
    Schlagwort(e): Biology ; Limnology ; Pollution ; Methodology ; Ecosystem management ; Water quality control ; Freshwater crustaceans ; Indicator species
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 5
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  • 64
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    Comparison of systems of biological indication approved during the course of the joint Anglo-Soviet investigations held under the auspices of the Institute of Hydrobiology of the Academy of Sciences of the Ukrainian SSR (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5265 | 1256 | 2011-09-29 15:10:07 | 5265 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: In accordance with the plan for joint Anglo-Soviet scientific and technical collaboration on environmental problems, the comparative evaluation of systems of hydrobiological analysis of the surface water quality started in 1977 at the Regional Laboratory of the Severn-Trent Water Authority in Nottingham were continued in the spring of 1978. The investigations were carried out under the auspices of the Institute of Hydrobiology of the Academy of Sciences of the Ukrainian SSR. Hydrobiological and hydrochemical samples were collected by Soviet and British specialists from the Kiev reservoir and the rivers Dnieper, Sozh, Desna and Snov. The samples were processed on the expedition ships and in the Laboratory for the Hydrobiology of Small Water Bodies of the Institute of Hydrobiology of the Academy of Sciences of the Ukrainian SSR. The possible approved methods to be adopted were evaluated from the samples using the phytoperiphyton, phytoplankton, zooplankton and zoobenthos against a background of hydrochemical characteristics. The study concludes that weather conditions complicated the work on testing the systems of biological indication of water quality and made it inadvisable to use those methods of comparison which were used when similar work was carried out in Nottingham.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Sampling ; Methodology ; Rivers ; International cooperation ; Water reservoirs ; Indicators ; Surveys ; Ukraine ; USSR
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 29
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  • 65
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    Determination of water quality in lakes by biological indices (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5269 | 1256 | 2011-09-29 15:10:28 | 5269 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Some problems of evaluation of water quality by biological indices which can be applied in the practice of ecological monitoring on water bodies are considered in this report. Taking into account, that ecological monitoring is the most urgent for large lakes, situated in civilised (urbanised) and (or) agrarian landscapes the corresponding problems will be considered mainly in conformity with large deep lakes of temperate latitudes. The aim is a general evaluation of some of the methods from the point of view of their possible application for monitoring on large water bodies.
    Schlagwort(e): Biology ; Limnology ; Pollution ; Ecosystem management ; Water quality control ; Freshwater lakes ; Indicators ; Classification ; Water quality ; Russia
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 20
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  • 66
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    Approval of systems of Biological Indication of Water Quality under the auspices of the Severn-Trent Water Authority, UK (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5271 | 1256 | 2011-09-29 15:10:31 | 5271 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: In accordance with the plan for joint Anglo-Soviet scientific and technical collaboration on environmental problems, the comparative evaluation of systems of hydrobiological analysis of the surface water quality started in 1977 at the Regional Laboratory of the Severn-Trent Water Authority in Nottingham were continued in the spring of 1978. The investigations were carried out under the auspices of the Institute of Hydrobiology of the Academy of Sciences of the Ukrainian SSR. Hydrobiological and hydrochemical samples were collected by Soviet and British specialists from the Kiev reservoir and the rivers Dnieper, Sozh, Desna and Snov. The possible approved methods to be adopted were evaluated from the samples using the phytoperiphyton, phytoplankton, zooplankton and zoobenthos against a background of hydrochemical characteristics.
    Schlagwort(e): Biology ; Limnology ; Pollution ; Rivers ; Water quality ; Water quality control ; Indicators ; Indicator species ; Phytoplankton ; International cooperation ; Ukraine
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 29
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  • 67
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    The application of methods of ecosystem analysis to the evaluation of water quality (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5266 | 1256 | 2011-09-29 15:10:09 | 5266 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Guided by experience and the theoretical development of hydrobiology, it can be considered that the main aim of water quality control should be the establishment of the rates of the self-purification process of water bodies which are capable of maintaining communities in a state of dynamic balance without changing the integrity of the ecosystem. Hence, general approaches in the elaboration of methods for hydrobiological control are based on the following principles: a. the balance of matter and energy in water bodies; b. the integrity of the ecosystem structure and of its separate components at all levels. Ecosystem analysis makes possible a revelation of the whole totality of factors which determine the anthropogenic evolution of a water body. This is necessary for the study of long-term changes in water bodies. The principles of ecosystem analysis of water bodies, together with the creation of their mathematical models, are important because, in future, with the transition of water demanding production into closed cycles of water supply, changes in water bodies will arise in the main through the influence of 'diffuse' pollution (from the atmosphere, with utilisation in transport etc.).
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Methodology ; Ecosystem management ; Ecosystems ; Water quality control ; Modelling ; Hydrobiology ; Water bodies
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 10
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  • 68
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    The colonization of Windermere by Crangonyx pseudogracilis (Crustacea, Amphipoda) 1961 to 1964 (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5280 | 1256 | 2011-09-29 15:11:13 | 5280 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: C. pseudogracilis , was first seen in the South Basin of Windermere in 1960. The colonization of the lake from South to North is described (1961 to 1964). The relationship with Asellus and Gammarus is mentioned. Possible reasons for its successful colonization are discused as are the methods by which it may have been transported to the lake.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Malacostraca ; colonization ; Freshwater crustaceans ; England ; Lake Windermere
    Repository-Name: AquaDocs
    Materialart: book , FALSE
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    Format: application/pdf
    Format: 13
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  • 69
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    A bibliography of works for the identification of freshwater invertebrates in the British Isles (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5276 | 1256 | 2011-09-29 15:10:59 | 5276 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: This bibliography covers the literature up to the end of 1978. The criteria used in the selection of references were that they should aid identification of invertebrates directly; thus, works solely concerned with the taxonomy of a particular group are in general omitted unless they contain a key. Some check-lists are however included where they give current nomenclature. The references are arranged alphabetically within each group and deal mainly with macro-invertebrates but include available keys to some microscopic invertebrates. Internal parasites and hymenopterous parasitoids are omitted. For insects the life stages to which the key applies are given where this is not clear in the reference. A number of keys to non-aquatic stages have been included in the hope that they may prove useful in certain circumstances. In addition, under a general head, latest check-lists are referred to together with bibliographies of algal keys and a guide for the identification of British water plants.
    Schlagwort(e): Biology ; Ecology ; Limnology ; freshwater crustaceans ; freshwater molluscs ; invertebrate zoology ; literature reviews ; aquatic animals
    Repository-Name: AquaDocs
    Materialart: book , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 18
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  • 70
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    An annotated bibliography of aquatic sediment traps and trapping methods (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5279 | 1256 | 2011-09-29 15:11:11 | 5279 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: This annotated bibliography is intended to give as reasonably complete a review of the existing literature as possible, and to offer some practical guidance in the selection and operation of sediment traps in future monitoring programmes.
    Schlagwort(e): Biology ; Ecology ; Limnology ; literature reviews ; particle settling ; collecting devices
    Repository-Name: AquaDocs
    Materialart: book , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 54
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  • 71
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    List of Publications of the Freshwater Biological Association 1929–1978 (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5277 | 1256 | 2011-09-29 15:11:01 | 5277 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: This bibliography covers the literature published by the Freshwater Biological Association between the years 1929-1978.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater biology ; Bibliographies
    Repository-Name: AquaDocs
    Materialart: book , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 133
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  • 72
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    Petroleum hydrocarbons in fresh waters: a preliminary desk study and bibliography (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5278 | 1256 | 2011-09-29 15:11:09 | 5278 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: A literature survey was carried out into the effects of petroleum hydrocarbons in freshwater, from the toxicity, biodegradability and concentration aspects. It was supplemented by a selective search on hydrocarbons in the marine environment for comparison. The aim was to determine the major inputs of these hydrocarbons, their accumulation, effects and fate in freshwaters. The search was confined to the period 1965-1978. The bibliography contains 390 references, divided by subject.
    Schlagwort(e): Chemistry ; Limnology ; Pollution ; literature reviews ; petroleum ; toxicity ; biodegradation
    Repository-Name: AquaDocs
    Materialart: book , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 52
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  • 73
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    Stress, shredders and streams: using gammarus energetics to assess water quality (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5308 | 1256 | 2011-09-29 15:06:41 | 5308 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: This paper reviews the effectiveness of Gammarus scope for growth (SfG) as an indicator of water quality. In addition, the link between physiological changes and effects at higher levels of biological organisation is addressed. Exposure to a range of toxicants resulted in decreases in Gammarus SfG which were qualitatively and quantitatively correlated with subsequent reductions in growth and reproduction. Reductions in SfG were due principally to a decrease in energy intake (i.e. feeding rate) rather than an increase in energy expenditure. Gammarus pulex is an important shredder in many stream communities and stressed-induced reductions in its feeding activity were correlated with reductions in the processing of leaf litter by a semi-natural stream community. Hence, changes in the physiological energetics of Gammarus provide a general and sensitive indicator of stress which can be linked to effects at higher levels of biological organisation. Under long-term stress and hence prolonged reductions in SfG, animals may adapt by modifying their life-history strategies and producing fewer, larger offspring.
    Schlagwort(e): Biology ; Limnology ; Pollution ; Indicator species ; Rivers ; Water quality ; Water quality control ; Aquatic communities ; Pollution effects ; Pollution indicators ; Animal physiology ; Freshwater crustaceans ; Acclimatization ; Bioassays ; Energy budget ; Environmental assessment ; Biological stress
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 98-110
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  • 74
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    From organism to population: the role of life-history theory (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5305 | 1256 | 2011-09-29 15:07:02 | 5305 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: The role of life-history theory in population and evolutionary analyses is outlined. In both cases general life histories can be analysed, but simpler life histories need fewer parameters for their description. The simplest case, of semelparous (breed-once-then-die) organisms, needs only three parameters: somatic growth rate, mortality rate and fecundity. This case is analysed in detail. If fecundity is fixed, population growth rate can be calculated direct from mortality rate and somatic growth rate, and isoclines on which population growth rate is constant can be drawn in a ”state space” with axes for mortality rate and somatic growth rate. In this space density-dependence is likely to result in a population trajectory from low density, when mortality rate is low and somatic growth rate is high and the population increases (positive population growth rate) to high density, after which the process reverses to return to low density. Possible effects of pollution on this system are discussed. The state-space approach allows direct population analysis of the twin effects of pollution and density on population growth rate. Evolutionary analysis uses related methods to identify likely evolutionary outcomes when an organism's genetic options are subject to trade-offs. The trade-off considered here is between somatic growth rate and mortality rate. Such a trade-off could arise because of an energy allocation trade-off if resources spent on personal defence (reducing mortality rate) are not available for somatic growth rate. The evolutionary implications of pollution acting on such a trade-off are outlined.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Life history ; Population characteristics ; Population dynamics ; Pollution effects ; Evolution ; Stress (mechanics)
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 63-74
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  • 75
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    Detection of cryptosporidium oocysts in water and environmental concentrates (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5340 | 1256 | 2011-09-29 15:02:29 | 5340 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Whilst current methods for the isolation and enumeration of Cryptosporidium spp. oocysts in water have provided some insight into their occurrence and significance, they are regarded as being inefficient, variable and time-consuming, with much of the interpretation being left to the expertise of the analyst. Two expectations of novel developments are to reduce the variability and subjectivity associated with the isolation and identification of oocysts. Flocculation, immunomagnetisable and flow cytometric techniques, for concentrating oocysts from water samples, should prove more reliable than current methods, whilst the development of more avid and specific monoclonal antibodies in conjunction with the use of nuclear fluorochromes will aid identification. Further insight into the viability, taxonomy, species identification, infectivity and virulence of the parasite should be forthcoming through the use of techniques such as the polymerase chain reaction, in situ hybridisation and non-uniform alternating current electrical fields. Such information is necessary in order to enable microbiologists, epidemiologists, engineers, utility operators and regulators to assess the safety of a water supply, with respect to Cryptosporidium contamination, more effectively.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Oocytes ; Protozoan diseases ; Parasites ; Life cycle ; Disease transmission ; Methodology ; Antibodies ; Fluorescence microscopy ; Luminescence ; Protists
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 126-138
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  • 76
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    Recent progress in the identification and determination of freshwater phytoplankton in the natural environment (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5326 | 1256 | 2011-09-29 15:05:15 | 5326 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: The biomass of the phytoplankton and its composition is one of the most important factors in water quality control. Determination of the phytoplankton assemblage is usually done by microscopic analysis (Utermöhl's method). Quantitative estimations of the biovolume, by cell counting and cell size measurements, are time-consuming and normally are not done in routine water quality control. Several alternatives have been tried: computer-based image analysis, spectral fluorescence signatures, flow cytometry and pigment fingerprinting aided by high performance liquid chromatography (HPLC). The latter method is based on the fact that each major algal group of taxa contains a specific carotenoid which can be used for identification and relative quantification of the taxa in the total assemblage. This article gives a brief comparative introduction to the different techniques available and presents some recent results obtained by HPLC-based pigment fingerprinting, applied to three lakes of different trophic status. The results show that this technique yields reliable results from different lake types and is a powerful tool for studying the distribution pattern of the phytoplankton community in relation to water depth. However, some restrictions should be taken into account for the interpretation of routine data.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Water supply ; Phytoplankton ; Identification ; Chromatographic techniques ; Water quality ; Water quality control ; Inland water environment ; Methodology ; Chlorophylls ; Germany
    Repository-Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 81-91
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  • 77
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    An introduction to RIVPACS (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5341 | 1256 | 2011-09-29 15:02:31 | 5341 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: RIVPACS (River InVertebrate Prediction And Classification System) is a software package developed by the Institute of Freshwater Ecology (IFE). The primary application is to assess the biological quality of rivers within the UK. RIVPACS offers site-specific predictions of the macroinvertebrate fauna to be expected in the absence of major environmental stress. The expected fauna is derived by RIVPACS using a small suite of environmental characteristics. The biological evaluation is then obtained by comparing the fauna observed at the site with the expected fauna. RIVPACS also includes a site classification based on the macroinvertebrate fauna of the component reference sites. New sites, judged by their fauna to be of high biological quality, may be allocated to classification groups within the fixed RIVPACS classification. This has potential for evaluating sites for conservation. In this chapter, the origins and history of the RIVPACS approach are described, including major scientific and operational developments over the life of the project. RIVPACS III is described in detail and predictions at different taxonomic levels are demonstrated. The value of the reference dataset for river management and conservation is examined, and the chapter concludes with a brief consideration of some future challenges.
    Schlagwort(e): Conservation ; Ecology ; Limnology ; Oocytes ; Protozoan diseases ; Parasites ; Life cycle ; Disease transmission ; Methodology ; Antibodies ; Fluorescence microscopy ; Luminescence ; Protists
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 1-24
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  • 78
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    The production of freshwater fish for food (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5345 | 1256 | 2011-09-29 15:02:58 | 5345 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-10
    Beschreibung: It has been estimated that in England and Wales fresh water covers some 340 square miles of which about one quarter is inhabited mainly by salmon and trout; in Scotland the lakes cover an area of 340 square miles. The principal object of this publication is to make available in handy form some of the methods, especially those involving the use of manures, by which crops of fish from water can be increased. The cultivation of water which this implies may be compared directly to the cultivation of farm land: the conditions for growth are made as favourable as possible, the seed is sown in the form of young fish, and after one or perhaps two growing seasons the crop is harvested. There are however many waters about the country where marketable fish are already available and can be removed without prejudice to, and indeed to the advantage of, sporting fisheries. In such cases it is necessary only to remove the fish and to rely on the natural processes of reproduction of those which are left to repopulate the water. Farming waters in the true sense is the concern of the greater part of this publication; the removal of crops of otherwise unwanted fish is considered in the last two sections on perch trapping and eel fisheries.
    Schlagwort(e): Biology ; Fisheries ; Limnology ; Freshwater fish ; Fish culture ; Fish ; Freshwater aquaculture ; Pond construction ; Fish ponds ; Food consumption ; Food fish ; UK
    Repository-Name: AquaDocs
    Materialart: book , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 315-322
    Format: 36
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  • 79
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    Concentrations of major ions in the stream water of the River Duddon, England, 1970-1974 [Dataset] (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5349 | 1256 | 2011-05-13 11:55:43 | 5349 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-10
    Beschreibung: This dataset provides raw data of chemical analyses made during studies on seasonal variations of some major ions in the stream water of the River Duddon in Cumbria. Measurements of sodium, calcium, potassium, magnesium and chloride ions and pH were taken at 5 stations in the River Duddon between January 1970 and August 1974.
    Beschreibung: This data was used in the publication: Carrick, T.R. & Sutcliffe, D.W.: Concentrations of Major Ions in Streams on Catchments of the River Duddon (1971-1974) and Windermere (1975-1978), English Lake District. Freshwater Biological Association, Ambleside, UK, 1983 (FBA Occasional Publications 22)
    Schlagwort(e): Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; dataset
    Repository-Name: AquaDocs
    Materialart: other
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  • 80
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    The coarse fishes of Britain (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5348 | 1256 | 2011-09-29 15:03:15 | 5348 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-10
    Beschreibung: The need for research upon the coarse fishes of Britain, questions of the breeding and rearing of large numbers of young fish, more especially roach, was established back in 1937. The investigation which was begun in 1939 at Barrington in Cambridgeshire was therefore, with the full approval of the National Federation of Anglers, devoted to the general life histories of as many species as possible. Now, five years later, the results of the investigation are presented in the hope that they will provide a basis of knowledge upon which sound policies can be devised for the improvement of fish stocks and the increase of sport. In this report the scientific data, which will be published in full elsewhere, have been condensed as much as possible, but nothing of importance has been omitted and nothing has been concealed.
    Schlagwort(e): Biology ; Fisheries ; Limnology ; Coarse fish ; Fishery surveys ; Fish physiology ; Food composition ; Competition ; Angling ; England
    Repository-Name: AquaDocs
    Materialart: book
    Format: application/pdf
    Format: application/pdf
    Format: 40
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  • 81
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    Freshwater biology and water supply in Britain (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5347 | 1256 | 2011-09-29 15:03:13 | 5347 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-10
    Beschreibung: This paper is designed to give a general account of freshwater biology as it bears on waterworks practice. Most water that is used for consumption will commonly go through a storage reservoir. Here special reference is given to the biological relations in standing waters, the biological control of water supplies, methods of plankton estimation, the biology of slow sand filtration and the use of algicides.
    Schlagwort(e): Biology ; Limnology ; Management ; Water reservoirs ; Water quality ; Water treatment ; Inland water environment ; Lacustrine sedimentation ; Algicides ; Water filtration ; Plankton
    Repository-Name: AquaDocs
    Materialart: book
    Format: application/pdf
    Format: application/pdf
    Format: 91
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  • 82
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    Analysis of stream waters in the catchment of Lake Windermere (1975-1978), England [Dataset] (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5351 | 1256 | 2011-05-13 11:55:21 | 5351 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-10
    Beschreibung: This dataset provides raw data of chemical analyses made during studies on seasonal variations of some major ions in the stream water of the catchment of Lake Windermere in Cumbria. Measurements of sodium, calcium, potassium, magnesium, chloride ions and pH were taken at 37 stations in the catchment between 1975 and 1978.
    Beschreibung: This data was used in the publication: Carrick, T.R. & Sutcliffe, D.W.: Concentrations of major ions in streams on catchments of the River Duddon (1971-1974) and Windermere (1975-1978), English Lake District. Freshwater Biological Association, Ambleside, UK, 1983 (FBA Occasional Publications 22)
    Schlagwort(e): Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; England ; Lake Windermere ; dataset
    Repository-Name: AquaDocs
    Materialart: other
    Format: text/html
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  • 83
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    On statistical treatment of the results of parallel trails with special reference to fishery research (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5346 | 1256 | 2011-09-29 15:03:10 | 5346 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-10
    Beschreibung: Parallel trials form a most important part of the technique of scientific experimentation. Such trials may be divided into two; categories. In the first the results are comparable measurements of one kind or another. In the second the data consist of records of the number of times a certain 'event' has occurred in the two sets of trials compared. Only trials of the second category are dealt with here. In this paper all the reliable methods of testing for significance the results of parallel trials of a certain type with special reference to fishery research are described fully. Some sections relate to exact, others to approximate tests. The only advantage in the use of the latter lies in the fact that they are often the more expeditious. Apart from this it is always preferable to use exact methods.
    Schlagwort(e): Biology ; Fisheries ; Limnology ; Freshwater fish ; Methodology ; Mathematical analysis ; Inland fisheries ; Equations ; Statistical analysis
    Repository-Name: AquaDocs
    Materialart: book
    Format: application/pdf
    Format: application/pdf
    Format: 55
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  • 84
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    Concentrations of major ions in 182 tarns in the English Lake District (1953-1978) [Dataset] (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5354 | 1256 | 2011-09-16 12:01:28 | 5354 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-10
    Beschreibung: This dataset provides raw data of chemical analyses made during studies on seasonal variations of 182 tarns in the English Lake District, Cumbria. Measurements of sodium, calcium, potassium, magnesium, pH, chloride ions, alkalinity, sulphite, strong acids and nitrate were taken between 1953 and 1978.
    Beschreibung: This data was used in the publication: Carrick, T.R. & Sutcliffe, D.W.: Concentrations of major ions in lakes and tarns on the English Lake District (1953-1978). Freshwater Biological Association, Ambleside, UK, 1982 (FBA Occasional Publications 16)
    Schlagwort(e): Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; alkalinity ; England ; Lake District ; dataset
    Repository-Name: AquaDocs
    Materialart: other
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  • 85
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    Analyses of treated sewage effluent from Grasmere Treatment Unit (1974-1976), England [Dataset] (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5352 | 1256 | 2012-07-04 19:32:47 | 5352 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-10
    Beschreibung: This dataset provides raw data of chemical analyses made during studies on seasonal variations of treated sewage effluent from Grasmere Treatment Unit in Cumbria. Measurements of sodium, calcium, potassium, magnesium and chloride ions were taken between 1974 and 1976.
    Beschreibung: This data was used in the publication: Carrick, T.R. & Sutcliffe, D.W.: Concentrations of major ions in streams on catchments of the River Duddon (1971-1974) and Windermere (1975-1978), English Lake District. Freshwater Biological Association, Ambleside, UK, 1983 (FBA Occasional Publications 22)
    Schlagwort(e): Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; England ; Grasmere ; dataset
    Repository-Name: AquaDocs
    Materialart: other
    Format: application/vnd.ms-excel
    Format: application/vnd.ms-excel
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  • 86
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    Concentrations of major ions in the stream water of the upper basin of the River Duddon, England, 1972-1974 [Dataset] (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5350 | 1256 | 2011-05-13 11:56:03 | 5350 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-10
    Beschreibung: This dataset provides raw data of chemical analyses made during studies on seasonal variations of some major ions in the stream water of the upper basin of the River Duddon in Cumbria. Measurements of sodium, calcium, potassium, magnesium and chloride ions and pH were taken at 26 stations in the River Duddon basin between 1972 and 1974.
    Beschreibung: This data was used in the publication: Carrick, T.R. & Sutcliffe, D.W.: Concentrations of Major Ions in Streams on Catchments of the River Duddon (1971-1974) and Windermere (1975-1978), English Lake District. Freshwater Biological Association, Ambleside, UK, 1983 (FBA Occasional Publications 22)
    Schlagwort(e): Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; England ; River Duddon ; dataset
    Repository-Name: AquaDocs
    Materialart: other
    Format: text/html
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  • 87
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    Major ions in 25 frequently sampled tarns in the English Lake District (1954-56, 1974-1976) [Dataset] (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5353 | 1256 | 2012-07-04 19:33:33 | 5353 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-10
    Beschreibung: This dataset provides raw data of chemical analyses made during studies on seasonal variations of 25 frequently sampled tarns in Cumbria. Measurements of sodium, calcium, potassium, magnesium, pH, chloride ions, alkalinity, sulphite, strong acids and nitrate were taken between 1954 and 1956 and between 1974-1976.
    Beschreibung: This data was used in the publication: Carrick, T.R. & Sutcliffe, D.W.: Concentrations of major ions in streams on catchments of the River Duddon (1971-1974) and Windermere (1975-1978), English Lake District. Freshwater Biological Association, Ambleside, UK, 1983 (FBA Occasional Publications 22)
    Schlagwort(e): Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; alkalinity ; England ; Lake District ; dataset
    Repository-Name: AquaDocs
    Materialart: other
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  • 88
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    Ecological study of chalk streams. Lambourn project. Interim report October 1977 to April 1979 (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5081 | 1256 | 2011-09-29 15:31:03 | 5081 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: Few detailed studies have been made on the ecology of the chalk streams. A complex community of plants and animals is present and much more information is required to achieve an understanding of the requirements and interactions of all the species. It is important that the rivers affected by this scheme should be studied and kept under continued observation so that any effects produced by the scheme can be detected. The report gives a synopsis of work carried out between 1971 and 1979 focusing on the present phase 1978-1979. It assumes some familiarity with the investigations carried out on the River Lambourn during the preceding years. The aims of the present phase of the project may be divided into two broad aspects. The first involves collecting further information in the field and includes three objectives: a continuation of studies on the Lambourn sites at Bagnor; comparative studies on other chalk streams; and a comparative study on a limestone stream. The second involves detailed analyses of data previously collected to document the recovery of the Lambourn from operational pumping and to attempt to develop simple conceptual and predictive models applicable over a wide range of physical and geographical variables. (PDF contains 43 pages)
    Schlagwort(e): Biology ; Ecology ; Limnology ; Chalk ; Limnological surveys ; Freshwater ecology ; Invertebrate larvae ; Macrophytes ; Freshwater fish ; Rivers ; England ; Lambourn River
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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  • 89
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    The Grassholme Channels (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5083 | 1256 | 2011-09-29 15:25:39 | 5083 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: The design and construction of four experimental channels at Grassholme reservoir in Teesdale, County Durham (UK) are briefly described. The problem of obtaining valid replication between channels is examined using published data obtained for previous experiments in the channels. It is concluded that replication may be obtained by careful experimental design. The limitations of the existing configuration of pipework and channel design are discussed and solutions suggested. Finally a list of the main components of the channels and suppliers is appended. Alternative materials and suppliers could well be found for most items. (PDF contains 23 pages)
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater ecology ; Rivers ; Temperature data ; Temperature measurement ; Experimental research ; Channels ; Limnological equipment ; England ; Grassholme Reservoir
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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  • 90
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    The temperatures of four Pennine streams (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5082 | 1256 | 2011-09-29 15:26:18 | 5082 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: Four streams in Teesdale (UK) were studied over a period of two years. The biological implications were studied by using the stream temperatures to predict both the times of brown trout eggs to hatching. Intragravel and stream water temperatures were compared for a spawning riffle in Great Eggleshope Beck. The effect of vegetation shading on water temperature was studied at Thorsgill Beck, which runs through deciduous woodland. An analysis was made of the time of day at which the maximum and minimum temperatures occurred in Carl Beck. Methods of calculating mean daily temperatures were examined. Estimations using the mid-point of the maximum/minimum range were usually higher than those from hourly temperature readings. (PDF contains 34 pages)
    Schlagwort(e): Biology ; Ecology ; Limnology ; Limnological surveys ; Freshwater ecology ; Freshwater fish ; Rivers ; Temperature data ; Temperature measurement ; Spawning ; Hatching ; Shading ; Salmo trutta
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    Materialart: monograph
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  • 91
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    Some observations on washout of brown trout (Salmo trutta L.) eggs in Teesdale streams (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5089 | 1256 | 2011-09-29 15:25:29 | 5089 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: Brown trout (Salmo trutta) in Teesdale lay their eggs in the streambed gravels in the Autumn, here the eggs slowly develop to emerge as young fry in the Spring. Whilst the eggs are in the gravel they are vulnerable to displacement by high water velocities. Eggs removed in this way are not thought to remain viable since they are very susceptible to death through physical shock - especially in the earlier stages of development. Streams in Teesdale are known to be amongst the most flashy in England and thus are good sites in which to study egg washout. Three field sites were used for the study of egg washout in Teesdale - Great Eggleshope, Thorsgill and Carl becks. This report describes preliminary studies of a varied nature into this subject from which an attempt is made to assess the importance of egg washout to the survival of brown trout in Teesdale.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater ecology ; Rivers ; Freshwater fish ; Fish eggs ; Survival ; Fry ; Population density ; Spawning ; England ; Teesdale
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 20
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  • 92
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    Survival of intragravel stages of brown trout (Salmo trutta L.) in Teesdale (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5088 | 1256 | 2011-09-29 15:26:16 | 5088 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: A study has been undertaken on several streams in Teesdale (UK)in order to examine survival rates of intragravel stages of brown trout and the factors influencing survival. Although all the becks contained brown trout spawning areas, some were utilised by more spawning trout than others. The best spawning sites as judged by this criterion were Thorsgill and Great Eggleshope becks where the research effort was therefore concentrated. There were two different spawning areas in Eggleshope, namely Great Eggleshope beck itself and Great Eggleshope spring fed tributary (Esft), data from these two areas are analysed separately in most parts of the text.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater ecology ; Rivers ; Freshwater fish ; Survival ; Fish eggs ; England ; Teesdale
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 37
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  • 93
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    Comparison of observed and predicted dates of eyeing, hatching and swim-up for brown trout and Atlantic salmon (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5090 | 1256 | 2011-09-29 15:25:31 | 5090 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: Scholars recently derived simple models from published data for the prediction from water temperature of hatching times for the eggs of brown trout (Salmo trutta L.) and Atlantic salmon (Salmo salar L.). A similar model to predict eyeing time for salmon eggs was obtained and used in this study, largely by analogy, to develop equations which might be used to obtain very approximate estimates of eyeing and swim-up times for salmon and brown trout. As the models were based on data for constant temperatures and some of them also had a very inadequate data base, it was desirable that they should be tested, as far as possible, against field and hatchery observations. The present report is a brief summary based on such data as have been obtained to date. None of the data sets were ideal for the purpose and the various inadequacies are discussed later in this report.
    Schlagwort(e): Biology ; Ecology ; Limnology ; Freshwater ecology ; Rivers ; Freshwater fish ; Fish eggs ; Hatching ; Temperature data ; England ; Teesdale
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 21
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  • 94
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    Changes in the phytoplankton (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5111 | 3949 | 2011-09-29 15:23:22 | 5111 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-08
    Beschreibung: An article discussing changes observed in phytoplankton of the Lake District. An overview is given of previous phytoplankton studies undertaken in the area, detailing some changes found in various waterbodies. Water quality changes in Lake Windermere are mentioned, including the gradual increase of dissolved organic matter (DOM), believed to be caused by the increase of sewage to the lake. The lakes in the Alps are given as an example of a similar anthropogenic pollution scenario. The treatment of a Lake District tarn with bone meal is described. The article goes on to discuss the composition of plankton throughout the year under a variety of climatic conditions. A figure shows seasonal variation in the consistuents of phytoplankton in Windermere (north basin).
    Schlagwort(e): Biology ; Chemistry ; Limnology ; Phytoplankton ; Limnology ; Dissolved organic matter ; Seasonal variations ; Sewage ; Water quality ; Annual reports ; England ; Lake District
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 42-45
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  • 95
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    The chemical budget of a lake (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5107 | 3949 | 2011-09-29 15:23:50 | 5107 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-08
    Beschreibung: A progress report on research undertaken on the chemical budget of a lake, outlining the importance of nitrogen and phosphorus in governing the production of life in freshwater. The report uses the Rivers Brathay and Leven, which flow into Windermere, as examples. The report also refers to the Rivers Rothay, Troutbeck and Cunsey. A table is including which shows the monthly average nitrate content (mg per litre) of the River Brathey and River Leven for 1937 into 1938. The report also includes a figure showing Windermere lake levels, discharge and rainfall during 1937. It also briefly considers possible anthropogenic influences on water quality.
    Schlagwort(e): Chemistry ; Ecology ; Limnology ; Phosphorus ; Organic compounds ; Sewage ; Diatoms ; Algae ; Sediment chemistry ; Seasonal variations ; Annual reports ; Nitrates ; River discharge ; England
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 38-42
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  • 96
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    Bacteria in freshwaters (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5114 | 3949 | 2011-09-29 15:21:32 | 5114 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-08
    Beschreibung: An article looking at the numerical distribution of bacteria in lakes, the types most commonly present and the nitrogen-cycle, in Lake Windermere. The methodology is explained, including the sampling frequency and depths, and bacteria culturing techniques. Water bodies other than Lake Windermere were also sampled and these are detailed, including a water reservoir. A summary of the work into horizontal of bacteria is given, including a table showing the number of bacteria per millilitre at different distances from inflow into Windermere. A summary of the work into vertical distribution is also given, including two figures, one showing seasonal variation during 1938-9 in numbers of bacteria at different depths in Winderemere, and the other showing the relationship between the numbers of bacteria at 10 metres depth in Windermere and the rainfull during the previous 7 days. A summary of the types of bacteria found, as well as work on the nitrogen cycle in Esthwaite Water, Lake Windermere and Blelham Tarn are given.
    Schlagwort(e): Biology ; Chemistry ; Limnology ; Nitrogen cycle ; Bacteria ; Freshwater ecology ; Limnology ; Seasonal variations ; Water column ; Water reservoirs ; Annual reports ; England ; Lake District
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 51-57
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  • 97
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    Ecology and management of water plants in lowland streams (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5118 | 3949 | 2011-09-29 15:22:27 | 5118 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-08
    Beschreibung: A review article which discusses the ecology and management of common water plants in lowland streams, with an introduction containing a review of previous studies on the subject. The article covers the significance of seasonal growth, the significance of stand structure (particularly in relation to hydraulic resistence), an assessment of current river management, improvements to plant management techniques (in relation to cutting), and alternatives to the traditional techniques of river plant management. There are a number of accompanying figures.
    Schlagwort(e): Biology ; Ecology ; Environment ; Management ; Aquatic plants ; Freshwater ecology ; River basin management ; Riparian vegetation ; Seasonal variations ; River discharge ; Annual reports ; Ranunculus calcareus ; Ranunculus spp. ; England
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    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 43-60
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  • 98
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    The culture of algae and its applications (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5108 | 3949 | 2011-09-29 15:23:52 | 5108 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-08
    Beschreibung: An article explaining how the methods and results from the time spent by the author culturing algae can be applied to other algal investigations. The work by the author found that physiological requirements differ widely among algae belonging to different systematic groups. Details are given of the results of a series of experiments which were undertaken in solutions with similar proporties to some natural waters in the Lake District. Reference is made to a paper under preparation at that time containing data on phytoplankton studied in the field within the Lake District during 1937. Reference is also made to Loch Leven and the affects of bluegreen alga on the number of trout caught weekly during 1937.
    Schlagwort(e): Biology ; Limnology ; Laboratory culture ; Plant physiology ; Algal culture ; Algae ; Freshwater fish ; Nitrogen ; Annual reports ; England ; Scotland
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    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 43-46
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  • 99
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    Changes in physical and chemical variables (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5112 | 3949 | 2011-09-29 15:23:20 | 5112 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: An article reviewing the work undertaken looking at the seasonal variation of chemical conditions in water at various depths in lakes. The laboratory tests undertaken for the research is outlined, as well as details of the sampling locations and the staff involved with the work. One figure shows the seasonal variation in the amounts of dissolved substances in the surface water of Windermere during 1936. Another figure shows seasonal varation inthe dry weight of phyto- and zooplankton in Windermere. Seasonal changes are discussed further and a table is included showing chemical conditions in winter and summer for Windermere.
    Schlagwort(e): Biology ; Chemistry ; Limnology ; Limnology ; Chemistry ; Seasonal variations ; Diatoms ; Phytoplankton ; Zooplankton ; Water column ; Surface water ; Annual reports ; England ; Lake District
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 46-51
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 100
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    Unbekannt
    Biological surveillance of chalk-streams (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5122 | 3949 | 2011-09-29 15:22:47 | 5122 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: An article reviewing the methods of biological surveillance of chalk-streams developed and commonly used at that time, with a focus on their application to the River Frome catchment in Dorset. In evaluating the surveillance methods, the author looks at sampling methods (including cores and kick-sampling), the level of identification of macroinvertebrates, and temporal and spatial variations. Responses of indices to organic pollution are also discussed. A number of accompanying figures are also included.
    Schlagwort(e): Biology ; Chemistry ; Ecology ; Environment ; Chalk ; Water management ; Cores ; Aquatic communities ; Freshwater ecology ; Invertebrate larvae ; Biological surveys ; Temporal variations ; Spatial variations ; Annual reports ; England
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 81-92
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
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