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  • 1
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    Green-Function Theory of Chemisorption (2006)
    Dordrecht : Springer
    Details
    Keywords: Catalysis ; Chemical engineering ; Chemistry ; Chemistry, Physical organic ; Chemistry ; Mathematics ; Surfaces (Physics)
    ISBN: 9781402044052
    URL: https://doi.org/10.1007/1-4020-4405-4
    Language: English
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  • 2
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    Hybrid Methods of Molecular Modeling (2008)
    Dordrecht : Springer
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    Keywords: Biology ; Data processing ; Chemistry ; Chemistry, Physical organic ; Materials ; Nanotechnology
    ISBN: 9781402081897
    URL: https://doi.org/10.1007/978-1-4020-8189-7
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  • 3
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    Fuel Cell Technologies: State and Perspectives : Proceedings of the NATO Advanced Research Workshop on Fuel Cell Technologies: State and Perspectives Kyiv, Ukraine 6–10 June 2004 (2005)
    Dordrecht : Springer
    Details
    Keywords: Catalysis ; Chemistry ; Condensed matter ; Materials ; Renewable energy sources
    ISBN: 9781402034985
    URL: https://doi.org/10.1007/1-4020-3498-9
    Language: English
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  • 4
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    Periodic Nanostructures (2007)
    Dordrecht : Springer
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    Keywords: Chemistry ; Chemistry ; Mathematics ; Computer graphics ; Nanotechnology
    ISBN: 9781402060205
    URL: https://doi.org/10.1007/978-1-4020-6020-5
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  • 5
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    Non-Linear Optical Properties of Matter : From molecules to condensed phases (2006)
    Dordrecht : Springer
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    Keywords: Chemistry ; Chemistry ; Chemistry ; Mathematics ; Condensed matter ; Quantum optics
    ISBN: 9781402048500
    URL: https://doi.org/10.1007/1-4020-4850-5
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  • 6
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    Models, Mysteries and Magic of Molecules (2008)
    Dordrecht : Springer
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    Keywords: Analytical biochemistry ; Chemistry ; Chemistry, Physical organic ; Crystallography ; Molecular structure ; Nanotechnology
    ISBN: 9781402059414
    URL: https://doi.org/10.1007/978-1-4020-5941-4
    Language: English
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  • 7
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    Radiation Induced Molecular Phenomena in Nucleic Acids : A Comprehensive Theoretical and Experimental Analysis (2008)
    Dordrecht : Springer
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    Keywords: Biochemistry ; Biology ; Data processing ; Biomedical engineering ; Chemistry ; Chemistry, Physical organic ; Materials
    ISBN: 9781402081842
    URL: https://doi.org/10.1007/978-1-4020-8184-2
    Language: English
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  • 8
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    Theoretical and Quantum Mechanics : Fundamentals for Chemists (2006)
    Dordrecht : Springer
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    Keywords: Chemistry ; Chemistry, Physical organic ; Chemistry, inorganic ; Mechanics, applied ; Molecular structure ; Quantum theory
    ISBN: 9781402036880
    URL: https://doi.org/10.1007/1-4020-3688-4
    Language: English
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  • 9
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    Fluid Transport in Nanoporous Materials (2006)
    Dordrecht : Springer
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    Keywords: Chemical engineering ; Chemistry ; Chemistry, Physical organic ; Polymers ; Thermodynamics ; Water pollution
    ISBN: 9781402043826
    URL: https://doi.org/10.1007/1-4020-4382-1
    Language: English
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  • 10
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    New Carbon Based Materials for Electrochemical Energy Storage Systems: Batteries, Supercapacitors and Fuel Cells (2006)
    Dordrecht : Springer
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    Keywords: Chemistry ; Electric engineering ; Nanotechnology ; Optical materials ; Surfaces (Physics)
    ISBN: 9781402048128
    URL: https://doi.org/10.1007/1-4020-4812-2
    Language: English
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  • 11
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    Molecular Materials with Specific Interactions (2007)
    Dordrecht : Springer
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    Keywords: Analytical biochemistry ; Chemistry ; Materials ; Nanotechnology
    ISBN: 9781402053726
    URL: https://doi.org/10.1007/1-4020-5372-X
    Language: English
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  • 12
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    Frontiers in Quantum Systems in Chemistry and Physics (2008)
    Dordrecht : Springer
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    Keywords: Chemistry ; Chemistry, Physical organic ; Condensed matter ; Quantum theory
    ISBN: 9781402087073
    URL: https://doi.org/10.1007/978-1-4020-8707-3
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  • 13
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    A Guide to Biomolecular Simulations (2006)
    Dordrecht : Springer
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    Keywords: Biology ; Data processing ; Biomedical engineering ; Chemistry
    ISBN: 9781402035876
    URL: https://doi.org/10.1007/1-4020-3587-X
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  • 14
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    Modeling Chemical Systems Using Cellular Automata : A textbook and laboratory manual (2005)
    Dordrecht : Springer
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    Keywords: Chemistry ; Chemistry, Physical organic ; Chemistry ; Mathematics ; Computer simulation
    ISBN: 9781402036903
    URL: https://doi.org/10.1007/1-4020-3690-6
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  • 15
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    Number Theory and the Periodicity of Matter (2008)
    Dordrecht : Springer
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    Keywords: Chemistry, Physical organic ; Chemistry, inorganic ; Chemistry ; Mathematics ; Materials ; Mathematics ; Physics
    ISBN: 9781402066603
    URL: https://doi.org/10.1007/978-1-4020-6660-3
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  • 16
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    An Introduction To Chemoinformatics (2007)
    Dordrecht : Springer
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    Keywords: Chemistry
    ISBN: 9781402062919
    URL: https://doi.org/10.1007/978-1-4020-6291-9
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  • 17
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    Battery Management Systems : Accurate State-of-Charge Indication for Battery-Powered Applications (2008)
    Dordrecht : Springer
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    Keywords: Chemistry ; Chemistry ; Mathematics ; Computer simulation ; Computer software ; Weights and measures
    ISBN: 9781402069451
    URL: https://doi.org/10.1007/978-1-4020-6945-1
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  • 18
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    Computational Studies of RNA and DNA (2006)
    Dordrecht : Springer
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    Keywords: Chemistry ; Chemistry, Organic ; Chemistry ; Mathematics
    ISBN: 9781402048513
    URL: https://doi.org/10.1007/978-1-4020-4851-3
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  • 19
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    Metathesis Chemistry : From Nanostructure Design to Synthesis of Advanced Materials (2007)
    Dordrecht : Springer
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    Keywords: Catalysis ; Chemistry ; Chemistry, Organic ; Materials ; Nanotechnology ; Polymers
    ISBN: 9781402060915
    URL: https://doi.org/10.1007/978-1-4020-6091-5
    Language: English
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  • 20
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    Smart Materials for Energy, Communications and Security (2008)
    Dordrecht : Springer
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    Keywords: Chemistry ; Engineering ; Magnetism ; Materials ; Optical materials
    ISBN: 9781402087967
    URL: https://doi.org/10.1007/978-1-4020-8796-7
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  • 21
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    Thermal Properties of Green Polymers and Biocomposites (2005)
    Dordrecht : Springer
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    Keywords: Chemistry ; Chemistry, Organic ; Chemistry, Physical organic ; Chemistry, inorganic ; Polymers
    ISBN: 9781402023545
    URL: https://doi.org/10.1007/1-4020-2354-5
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  • 22
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    Chemoinformatics : Theory, Practice, & Products (2007)
    Dordrecht : Springer
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    Keywords: Biochemistry ; Bioinformatics ; Chemistry ; Chemistry, Organic ; Medicine
    ISBN: 9781402050015
    URL: https://doi.org/10.1007/1-4020-5001-1
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  • 23
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    Chemistry from First Principles (2008)
    Dordrecht : Springer
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    Keywords: Chemistry ; Chemistry, Physical organic ; Chemistry ; Mathematics ; Quantum theory
    ISBN: 9781402085468
    URL: https://doi.org/10.1007/978-1-4020-8546-8
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  • 24
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    Modern Formal Methods and Applications (2006)
    Dordrecht : Springer
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    Keywords: Chemistry ; Mathematics ; Computer science ; Logic design
    ISBN: 9781402042232
    URL: https://doi.org/10.1007/1-4020-4223-X
    Language: English
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  • 25
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    Structure-based Drug Discovery (2007)
    Dordrecht : Springer
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    Keywords: Biochemistry ; Biochemistry ; Chemistry ; Chemistry, Physical organic
    ISBN: 9781402044076
    URL: https://doi.org/10.1007/1-4020-4407-0
    Language: English
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  • 26
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    Hydrogen Bonding—New Insights (2006)
    Dordrecht : Springer
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    Keywords: Chemistry ; Chemistry, Physical organic ; Chemistry ; Mathematics ; Crystallography
    ISBN: 9781402048531
    URL: https://doi.org/10.1007/978-1-4020-4853-1
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  • 27
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    Topics in the Theory Of Chemical and Physical Systems : Proceedings of the 10th European Workshop on Quantum systemsin chemistry and physics held at Carthage, Tunisia, in September 2005 (2007)
    Dordrecht : Springer
    Details
    Keywords: Chemistry ; Chemistry, Physical organic ; Materials ; Molecular structure ; Plasma (Ionized gases) ; Quantum theory
    ISBN: 9781402054600
    URL: https://doi.org/10.1007/978-1-4020-5460-0
    Language: English
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  • 28
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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
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Chemistry ; Ecology ; Limnology ; Data ; Data processing ; Data collections ; Chemical compounds ; Toxicity ; Bioaccumulation ; Biodegradation ; Metabolism
    Repository Name: AquaDocs
    Type: monograph
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    Format: 8
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  • 29
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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
    Details
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Chemistry ; Limnology ; Pollution ; Eutrophication ; Freshwater lakes ; Limnological surveys ; Phosphorus ; Phytoplankton ; Primary production ; Sediment analysis ; Water quality ; England ; Esthwaite Water
    Repository Name: AquaDocs
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  • 30
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    Fishing gear experiments in Finland (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5310 | 3949 | 2011-09-29 15:07:00 | 5310 | Freshwater Biological Association
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    Publication Date: 2021-07-09
    Description: A comparison of some different European methods of estimating the numbers of fish in a lake using different fishing gear is described. The different gears used were 1. surface trawl used by night 2. bottom trawl used by day 3. trammel nets, set in the evening and lifted in the morning 4. surface seine net used by night 5. bottom seine net used by day 6. Fyke nets, emptied each morning and evening 7. gill nets, set in the evening and lifted in the morning. The most variable catches were from those gears used by day on the bottom and the least variable were those used by night at the surface. The work continued by examining the use of acoustic systems for pelagic fish stock assessment. This gear gave reasonable population estimates for pelagic fish 10m and more below the surface. The advantage of the accoustic method is that it is quick and requires little labour. Its disadvantage is that it is not possible to identify the species and so it must be supplemented by another, conventional method.
    Keywords: Fisheries ; Management ; Acoustic equipment ; Entangling nets ; Experimental fishing ; Fishery surveys ; Fishery resources ; Fishing gear ; Gillnets ; Population number ; Seine nets ; Trap nets ; Trawl nets ; Europe ; Annual report
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  • 31
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    Zooplankton patchiness (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5312 | 3949 | 2020-08-23 05:42:57 | 5312 | Freshwater Biological Association
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    Publication Date: 2021-07-09
    Description: This review considers three general aspects of research on zooplankton patchiness: the detection of patchiness, the description of patchiness and the causes of patchiness.
    Keywords: Ecology ; Limnology ; Freshwater lakes ; Horizontal distribution ; Annual report
    Repository Name: AquaDocs
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  • 32
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    Proximate composition and amino acids profile of smoked catfish Clarias gariepinus and tilapia Oreochromis niloticus (2021)
    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23226 | 19325 | 2018-03-18 14:51:17 | 23226 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-13
    Description: The proximate composition and amino acids assay of smoked Clarias gariepinus and Oreochromis niloticus were determined using standard procedures. The mean proximate composition of Oreochromis niloticus are 8.9% moisture, 16.00% lipids, 5.6% ash, 44.5% crude protein, 0.42% crude fiber and 24.9% NFE while Clarias gariepinus has 8.19% moisture, 15.55% lipids, 4.725 ash, 40.46% crude protein, 0.50% crude fiber and 30.58% NFE. There is therefore a nutrient variation between the 2 species of fish Oreochromis niloticus has higher crude protein, lipids, moisture and ash content than Clarias gariepinus.The amino acids profile shows that both fishes have 17 amino acids. Apart from Tryptophan, the following essential amino acids Histidine, Methionine, Threonine, Isoleucine, Leucine, Lysine, Valine and Phenylalanine are present in both fish. Oreochromis niloticus however has higher quantities of the essential amino acids except for Histidine than Clarias gariepinus
    Description: Includes:- 2 tables.;2 figs.;7 refs.
    Keywords: Chemistry ; Fisheries ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Kainji L. ; freshwater environment ; Amino acids ; Ash content ; Lipids ; Organic compounds ; Moisture ; Proteins
    Repository Name: AquaDocs
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  • 33
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    Evaluations off heavy metals in fish from Lake Geriyo Yola, Nigeria using x-ray fluorescence technique (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23338 | 19325 | 2018-04-07 17:17:18 | 23338 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The evaluation of Cr. Cu, Mn, Fe, Ni, Zn,As and Pb concentrations in Clarias gariepinus and Oreochromis niloticus from Lake Geriyo Yola,Adamawa, Nigeria using X - ray fluorescence (XRF) technique is discussed. The analytical samples are irradiated with high energy electrons of 109Cd to produce fluorescent X-rays was produced which passes to the Silicon-lithium detector through Mo target as a source of monochromatic X-rays. The spectrum of energy generated on the detector was processed by a Multi- Channel Analyzer to obtain analytical data. The intensity of the fluorescent X-rays on the detector is proportional to the concentration of the individual element of interest in the sample. This method can identify up to 30 or more elements at the same time. The results showed varying levels of heavy metals in the fishes. The concentrations of Cr, Mn, Cu, and Ni in the fishes were much higher than WHO and PEPA maximum permissible limits, while the concentrations of Zn and Pb were lower than the standards. The results suggest that the lake is polluted with Cr, Mn, Cu and Ni and the consumption of fishes of the lake is life threatening to man.
    Description: Includes:- 1table.;11 refs.
    Keywords: Ecology ; Chemistry ; Pollution ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Geriyo L. ; freshwater environment ; Heavy metals ; Fish ; X-ray fluorescence analysis ; Pollution ; Pollution effects
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  • 34
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    Effects of salinity on larval dimension of Tilapia guineensis (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23422 | 19325 | 2018-04-25 19:24:46 | 23422 | Fisheries Society of Nigeria
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    Publication Date: 2021-07-14
    Description: Tilapia guineensis eggs were spawned and hatched in different salinities (17, 12, 7, 5, 2 and 0) ppt. The study was conducted in eight replicates. The aim of the investigation was to ascertain disparity in hatching size of Tilapia guineensis attributable to salinity. Immediately hatching was observed, body weight of five hatchlings in each replicate was individually weighed in milligramme. The individual total length of the five hatchlings was also measured in millimeter. The height of the yolk sac larva was determined with micro-metre screw gauge graduated in millimeter from the top of the yolk sac to the dorsal region of the larva. Data obtained were used to calculate yolk sac volume. Significant differences (P〈0.01) were observed in body weight and total length of larvae hatched in different salinities. The heaviest and longest larvae were hatched in 12 ppt saline water. The yolk sac volume of larvae hatched in lower salinities were significantly higher (P〈0.01) than the yolk sac volume of larvae hatched in higher salinities. The smallest yolk sac volume was recorded in 12ppt saline water. Our findings show that salinity could be manipulated for economic production of heavier seeds of Tilapia.
    Description: Includes:- 5 tables.;6 refs.
    Keywords: Aquaculture ; Chemistry ; Tilapia guineensis ; Nigeria ; brackishwater environment ; Salinity effects ; Larvae
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  • 35
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    Physico-chemical parameters of fish ponds as it affects fish production in Ado-Ekiti, Ekiti State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24590 | 19325 | 2018-05-20 16:05:58 | 24590 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The water analysis of five selected ponds in Ado-Ekiti in Ekiti State, was carried out to determine their suitability for fish culture. Pa rameters analyzed were: Temperature, Turbidity, Carbon (IV) oxide, Alkalinity, Hardness, pH and Dissolved oxygen. Values for temperature ranged between 20.0~'C and 29.0~'C, Turbidity values were between 46.0-50.2cm, Carbon (IV) oxide: 11.5-12.2mg/litre; alkalinity: 100-120mg/liter; hardness: 110-200mg/litre; pH: 6.8-7.8 and dissolved oxygen: 5.8-6.8mg/liter. The values obtained were found to be within acceptable range for fish production.
    Description: Includes: 10 references.
    Keywords: Aquaculture ; Chemistry ; Nigeria ; Physico-chemical parameter ; Fish pond ; Ado-Ekiti ; Fish production ; freshwater environment ; automation
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  • 36
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    Effect of Terminalia suparba on fecundity and latency period of Clarias gariepinus broodstocks (2021)
    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24067 | 19325 | 2018-05-10 10:15:21 | 24067 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study focused on the assessment of Terminalia suparba (bark, leave and root) based diet to improve the ovulation of Clarias gariepinus brood stocks. Ten female and ten male brood stocks were obtained from a reputable fishfarm in Ogun State, Nigeria and were fed with the diets for four weeks before the breeding exercise. The latency period observed in treatments 1 to 4 was 4hours 30minutes while the ovulation period in treatment 5 was 8 hours. There was no significant different (P〉0.05) among the means. The brood stocks in Treatment 2 (Root) has the highest fecundity count (2001) while those in Treatment 5 (control) has the least fecundity count (1496). The phytochemical analysis of the plant materials showed the presence of Alkaloids, Tannin, Phenol, Glycoside, Flavonoids, Steroids, Phlobatannin, Saponin, Anthraquinones. The physical and chemical parameters of water observed showed that dissolved oxygen value ranges from 3.28 -4.60, pH 6.5 - 8.5, temperature 28.0 - 28.8 and conductivity 8.9 - 9.20. It is therefore concluded that the inclusion of Terminalia suparba in the feed of Clarias gariepinus broodstock will not only improve ovulation but also reduce the latency period.
    Description: Includes: 5 tables;Also includes: 11 refs.
    Keywords: Aquaculture ; Chemistry ; Ecology ; Clarias gariepinus ; Nigeria ; broodstocks ; Terminalia specie ; Latency ; fecundity ; Clarias gariepinus ; freshwater environment ; Artificial feeding ; Feeding experiments ; Fecundity ; Brood stocks ; Sublimation heat ; Ovulation ; Physicochemical properties ; Fish culture
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  • 37
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    Survey of physical characteristics of the upper reaches of new Calabar River, Niger Delta, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24618 | 19325 | 2018-05-22 06:12:36 | 24618 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: One of the priority research projects of the Nigerian Institute for Oceanography and Marine Research (NIOMR) is broodstock development and mass propagation of silver catfish, Chrysichthys nigrodigitatus of which the broodstock is naturally abundant in New Gala River. Selected physical characteristics and water physico-chemical parameters of the upper reach of the New Calabar River at Aluu were investigated. The highest depth value of 9.20 m was recorded in the middle of the river. The width of the river measured during spring high tide and low tide were 174 m and 110 m respectively. The cross-sectional area and average flow velocity of the river were 797.13 m2 and 0.374 m/s respectively. The discharge of the river was computed as 298.13m3/s. The river water was acidic most of the period (Hydrogen ion concentration, pH: 5.12 to 7.43), with low total alkalinity values (4.00 to 12.00 mgCaCO3/L) and low total hardness values (11.5 to 51.2 mgCaCO3/L) which indicate that the river water is black and soft. There was significant (p~,0.05) seasonal variation in temperature (23.1 to 31.7~'C\}, Secchi transparency (9.30 to 19.00 cm), total hardness (11.5 to 51.2 mgCaCO3/L), dissolved oxygen (5.20 to 7.50 mg/L) and dissolved oxygen deficit (0.02 to 2.95mg/L). These results are useful for several stake holders who use the river as a sink for trade wastes, as source of water for fish farming, as source of broodstocks of Chrysichthys nigrodigitatus, as raw water for water treatment plants, and as means of transportation of industrial materials.
    Description: Includes: 16 references.
    Keywords: Chemistry ; Fisheries ; Limnology ; Chrysichthys nigrodigitatus ; Nigeria ; New Calabar River ; New calabar River ; Physical characteristics and physico-chemical features ; Seasonal variation ; freshwater environment ; automation
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    Physico-chemical parameters in relation to fish production of Dadin Kowa Dam, Gombe State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24619 | 19325 | 2018-05-22 06:14:16 | 24619 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Eight month physicochemical study of Dadin Kowa Dam was carried out forthnightly from July, 2011 to february 2012. Air temperature ranged from 18.25~'C ~c 28~'C ~c 0.50 to 28~'C ~c 2.16. Water tmperature ranged from 18.75~'C ~c 2.21. Transparency ranged from 11.00cm ~c 1.83 to 29.63 cm ~c ~c 2.14. Conductivity ranged from 13.00~Ks/cm ~c 13.33 to 41.38~Ks/cm ~c 5.54. Hydrogen ion (pH) ranged from 6.69 ~c 1.03 to 8.39 ~c 1.17. Dissolved oxygen ranged from 6.39mg/l ~c 1.03 to 10.14mg/l ~c 1.17. Total alkalinity ranged from o.69mg/l ~c 0.38 1.34mb/l ~c 0.02. Total ammonia ranged from 0.20mg/l ~c 0.027 to 0.83mg/l ~c 0.05. There were various levels of correlation between these parameters. There was no significant difference between both sites and months (p〉0.05) of all the parameters except total nitrogen which show a significant difference between the sites (p〈0.05) and transparency also shows a significance between the months (p〈0.05). All physicochemical parameters were almost within the tolerable limits for supporting aquatic life.
    Description: Includes: 27 references.
    Keywords: Fisheries ; Chemistry ; Nigeria ; Dadin Kowa Dam ; Physico-chemical parameters ; Fish production ; Dadin Kowa Dam ; freshwater environment ; automation
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    Physico-chemical and bacteriological investigation of fish and water in Aiba reservoir, Iwo (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23326 | 19325 | 2018-04-06 16:03:20 | 23326 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: This study looked into the physicochemical and bacteriological investigation of fish and water in Aiba Reservoir. Water and fish samples collected were studied to assess their bacteriological and physicochemical characteristics and their suitability for domestic purposes. Structural questionnaires were administered to the fishermen around the reservoir and experiments were carried out in the laboratory to analyze the samples. The results showed that the total viable bacteria count was high(1.02 x 105 cfu/ml) while few Staphylococcus aureus and E. coli occurred insignificantly. The population of S. aureus and E. coli in the fish gills, liver and tissue were insignificant. The results obtained from the physicochemical analysis of the water samples showed that the reservoir has optimum water temperature of 29degreesC ~c 0.25, a pH of 7.70 ~c 0.20, dissolved Oxygen level of 7.20mgO2/1 ~c 0.20 and total hardness of 45.00 mg/ICaC03 ~c 1.05. The microbial load in the fish sample is higher than that in the water sample. Further strict hygienic measures and surveillance is recommended so as to improve the water quality and to avoid deleterious effects on the health of the Iwo inhabitants and its neighboring communities who also benefit from the reservoir.
    Description: Includes:- 2 figs.;11 refs.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Aiba Reservoir ; freshwater environment ; Physicochemical properties ; Bacteriology ; Water quality ; Water ; Bacterial counters
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    Primary production and physico-chemical parameters of a freshwater fish farm in the south east Nigeria (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23410 | 19325 | 2018-04-12 09:04:25 | 23410 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: Comparative primary production in Little Stream Farms, near Uyo was investigated in relation to physico-chemical parameters of the adjacent perennial stream and the fish ponds. Except for temperature, which showed the same values for both stations, physico-chemical variables generally showed significant difference (P〈O.05) between the pond water and the adjacent stream. Values of silicates, Turbidity (NTU), Secchi Disc Transparency and Total Suspended Solids (TSS) exhibited significantly variable trends (P〈O.05), especially in the stream water, in response to the commercial sand dredging activities upstream from the fann location. Lowest value of stream transparency (O.1M) recorded was during the peak of the sand dredging, whereas the stream water showed absolute transparency in the absence of the dredging. The water quality parameters also exhibited a general trend of significant seasonal variation (P〈O.05). Five phytoplankton families: Bacillariophyceae, Chlorophyceae, Cyanobacteria, Euglenophyceae and Dinophyceae occurred in the ponds, while three families, Bacillariophyceae, Chlorophyceae and Cyanobacteria occurred in the stream. Bacillariophyceae showed the highest relative abundance in both stations A and B.
    Description: Includes:- 1 table.;3 figs.;11 refs.
    Keywords: Aquaculture ; Chemistry ; Ecology ; Nigeria ; Akwa Ibom State ; freshwater environment ; Physicochemical properties ; Freshwater ecology ; Water quality ; Phytoplankton ; Suspended particulate matter
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    Assessment of water quality parameters in Lake Alau (2021)
    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23404 | 19325 | 2018-04-12 08:55:07 | 23404 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-14
    Description: The physico-chemical parameters of Lake Alau were monitored for four months to assess the water quality. Parameters such as temperature, transparency, conductivity, dissolved oxygen, biochemical oxygen demand, Ca, P, etc were studied in five stations (A, B, C, D and E). Water samples were collected monthly from 8:00 to l2:00noon, for four months (July - October 2008, wet season) and analysed. The physico-chemical parameters were within the ranges of unpolluted water bodies. Variation occurs in almost all the months of the study. Significant difference (P〈0.05) occurred in pH, transparency and Ca among the stations, and insignificant difference (P〉0.05) in temperature, conductivity, dissolved oxygen, biochemical oxygen demand, Mg and P. These variations may be due to effects of fertilizer application, herbicides and insecticides in irrigated farms around the Lake.
    Description: Includes:- 2 tables.;24 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Alau L. ; freshwater environment ; Physicochemical properties ; Water quality ; Temperature ; Turbidity ; Transparency ; Dissolved oxygen
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    Preliminary studies on some physico-chemical parameters and fish species composition of Doma Dam, Nasarawa State, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24638 | 19325 | 2018-05-24 09:36:38 | 24638 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Study of some Physico-chemical parameters and fish species composition of Doma Darn was carried out between the month of August 2012. Fishing communities along the dam were selected at sampling stations and collection of fish species. The values of physico-parameters obtained for stations were in the range of 28.10-92 m for depth, 27.70-28.48~'for temperature, 7.03-7.64 for PH, 7.23-7.64mg/l for dissolved oxygen (DO), 30.08-31.75 ntu for turbidity, 94.64-105.17mg/l for alkalinity and 79.17-80.58mg/l for total hardness. The result indicated that there was significant difference (p〈0.5)for depth, temperature turbidity and alkalinity, while there was no significant difference (p〈0.05) for DO, pH and water hardness among the stations. The result of these parameters among the duration shows that there was significant different (p〈0.05) in all the parameters except pH. The study revealed that there were twenty-five (25) fish species belonging to 12 families in the dam. The family Cichlidae and Mochokidae and Bagridae which has three each, While the family, Polypteridae, Channidae, Centropomidae, flepsetidae and Protopteridae has the lowest number of one (1) each. The overall result revealed that the Phvsico-chemical parameters were mostly influenced by duration and not much by stations; and parametersoaram measured were within the recommended water quality requirement for growth and survival of aquatic organisms.
    Description: Includes: 10 references.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Doma Dam ; Doma Dam ; Fishing community ; Physico-chemical parameter ; Fish species ; freshwater environment ; automation
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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
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Biology ; Ecology ; Environment ; Bacteria ; Fungi ; Microbiological culture ; Viruses ; Actinomycetes ; Annual report
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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
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Biology ; Ecology ; Environment ; Phytoplankton ; Algae ; England ; Dorset ; Annual report
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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
    Details
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Biology ; Ecology ; Limnology ; Age composition ; Esox lucius ; Perca fluviatilis ; England ; Lake District ; Annual report
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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
    Details
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Biology ; Ecology ; Environment ; Ecological distribution ; Ecology ; Watersheds ; England ; Dorset ; Annual report
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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
    Details
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Biology ; Ecology ; Fisheries ; Life cycle ; Physiology ; Lampetra fluviatilis ; Annual report
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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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    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Zooplankton ; Lakes ; Cladocera ; England ; Esthwaite Water ; Annual report
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  • 49
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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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    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Chemistry ; Environment ; Chemical analysis ; Chemical composition ; Rivers ; Stream flow ; Annual report ; England ; Dorset
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    The communities of running water in Cumbria (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5164 | 3949 | 2011-09-29 15:18:18 | 5164 | Freshwater Biological Association
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    Publication Date: 2021-07-08
    Description: For conservations of nature to be effective. there must be an understanding of what is present to be conserved. Thus in order to conserve the communites of the Cumbrian rivers, there must first be surveys to determine the spp present and their relative numbers. This has been carried out for many years, by a number of workers. It has been shown that the communities present are influenced by the substratum, the flow, the chemicals present, water temp and predation. Findings of the work on the River Lune were given at a seminar on the rivers of north-west Europe, held at Amiens in November, 1975. The proceedings of the seminar are to appear in special numbers of Bulletin francais de Pisciculure.
    Keywords: Ecology ; Environment ; Aquatic communities ; Rivers ; England ; Cumbria ; Annual report
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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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    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Biology ; Ecology ; Feeding ; Taxonomy ; Metabolism ; Salmo trutta ; Annual report
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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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    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Chemistry ; Earth Sciences ; Diagenesis ; Freshwater lakes ; Geochemistry ; Lipids ; Sediment analysis ; Annual report
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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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    Publication Date: 2021-07-09
    Description: 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.
    Keywords: 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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    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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    Publication Date: 2021-07-09
    Description: Information on fecundity, oviposition behaviour, egg hatching, and parthenogenetic development of Ephemeroptera is reviewed and summarized.
    Keywords: Biology ; Ecology ; Reproduction (biology) ; Ephemeroptera ; Annual report
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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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    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Biology ; Ecology ; Algae ; Fresh water ; Growth ; Phosphates ; Population dynamics ; Seasonal variations ; Silicates ; Achnanthes minutissima ; Meridion circulare ; Synedra ulna ; Annual report
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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
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Chemistry ; Limnology ; Pollution ; Modelling ; Models ; Humic acids ; Surface water ; Aluminium compounds ; Aluminium ; Ions ; Toxicity ; England ; Duddon River
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    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 26
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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
    Publication Date: 2021-06-24
    Description: 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.
    Keywords: 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
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    Format: 31-44
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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
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Biology ; Ecology ; Animal morphology ; Distribution records ; Fresh water ; Hosts ; Larvae ; Life cycle ; Parasites ; Predators ; Taxonomy ; Acari ; Arachnida ; Hydrachnellae ; British Isles ; Annual report
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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
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Biology ; Ecology ; Aquatic communities ; Check lists ; Classification Systems ; Environmental factors ; Fresh water ; Rivers ; Sampling ; Invertebrata ; Annual report
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    Type: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 80-93
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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
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: 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
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    Format: application/pdf
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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
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: 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
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    Format: application/pdf
    Format: 57-82
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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
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Biology ; Ecology ; Anoxic conditions ; Dissolved oxygen ; Ecophysiology ; Freshwater lakes ; Light effects ; Physiochemical properties ; Turbulence ; Vertical migrations ; Loxodes ; England ; Cumbria ; Annual report
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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
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: 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
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    Format: application/pdf
    Format: 83-96
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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
    Details
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Biology ; Management ; Costs ; Efficency ; Experimental research ; Ichthyology ; Annual report
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: 68-87
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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
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Chemistry ; Limnology ; Pollution ; Insecticides ; Metabolism ; Toxicity ; Biodegradation ; Adsorption
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 54
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    Habitat segregation in fish assemblages (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5249 | 3949 | 2011-09-29 15:08:57 | 5249 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: The segregation of habitats of fish assemblages found in the chalk streams and rivers within the Wessex, South West and Southern Water Authority boundaries in southern England have been examined. Habitat segregation is the most frequent type of resource partitioning in natural communities. The habitat of individual fish species will be defined in order to determine the following: (1) the requirements of each species in terms of depth, current velocity, substrate, cover etc.; (2) identify the essential habitat variables in the segregation of species; (3) whether species in an assemblage demonstrate resource partitioning with reference to habitat, and (4) the mechanisms behind such resource partitioning.
    Keywords: Ecology ; Fisheries ; Freshwater fish ; Research proposals ; Rivers ; Species diversity ; England ; Annual report
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: 88-90
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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
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Biology ; Ecology ; Environment ; Aquatic environment ; Genetics ; Microorganisms ; England ; Annual report
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: 91-107
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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
    Details
    Publication Date: 2021-07-09
    Description: 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.
    Keywords: Chemistry ; Limnology ; Pollution ; literature reviews ; petroleum ; toxicity ; biodegradation
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: 52
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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
    Publication Date: 2021-07-10
    Description: 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.
    Description: 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)
    Keywords: Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; dataset
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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
    Publication Date: 2021-07-10
    Description: 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.
    Description: 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)
    Keywords: Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; England ; Lake Windermere ; dataset
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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
    Publication Date: 2021-07-10
    Description: 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.
    Description: 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)
    Keywords: Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; alkalinity ; England ; Lake District ; dataset
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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
    Publication Date: 2021-07-10
    Description: 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.
    Description: 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)
    Keywords: Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; England ; Grasmere ; dataset
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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
    Publication Date: 2021-07-10
    Description: 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.
    Description: 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)
    Keywords: Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; England ; River Duddon ; dataset
    Repository Name: AquaDocs
    Type: other
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  • 74
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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
    Publication Date: 2021-07-10
    Description: 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.
    Description: 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)
    Keywords: Chemistry ; Limnology ; Calcium ; chlorides ; fresh water ; ions ; magnesium ; potassium ; seasonal variations ; sodium ; water analysis ; alkalinity ; England ; Lake District ; dataset
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  • 75
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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
    Details
    Publication Date: 2021-07-08
    Description: 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).
    Keywords: Biology ; Chemistry ; Limnology ; Phytoplankton ; Limnology ; Dissolved organic matter ; Seasonal variations ; Sewage ; Water quality ; Annual reports ; England ; Lake District
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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
    Details
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Chemistry ; Ecology ; Limnology ; Phosphorus ; Organic compounds ; Sewage ; Diatoms ; Algae ; Sediment chemistry ; Seasonal variations ; Annual reports ; Nitrates ; River discharge ; England
    Repository Name: AquaDocs
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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
    Details
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Biology ; Chemistry ; Limnology ; Nitrogen cycle ; Bacteria ; Freshwater ecology ; Limnology ; Seasonal variations ; Water column ; Water reservoirs ; Annual reports ; England ; Lake District
    Repository Name: AquaDocs
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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
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Biology ; Chemistry ; Limnology ; Limnology ; Chemistry ; Seasonal variations ; Diatoms ; Phytoplankton ; Zooplankton ; Water column ; Surface water ; Annual reports ; England ; Lake District
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    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
    Publication Date: 2021-07-08
    Description: 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.
    Keywords: Biology ; Chemistry ; Ecology ; Environment ; Chalk ; Water management ; Cores ; Aquatic communities ; Freshwater ecology ; Invertebrate larvae ; Biological surveys ; Temporal variations ; Spatial variations ; Annual reports ; England
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    The design and development of the Windermere Profiler. An instrument for measuring how various environmental parameters vary with depth in lakes, reservoirs and rivers (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5123 | 3949 | 2011-09-29 15:22:51 | 5123 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-08
    Description: A review article detailing the background, development and functionality of the Windermere Profiler, a multi parameter environmental monitoring instrument for use in lakes, reservoirs and rivers. The article explains the requirement for regular data collection by the Freshwater Biological Association at Windermere. The article covers the requirements of a profiling instrument, the design considerations, the electronic circuitry, the computer program, the operation of the computer software, the profiler in use and further developments to the design. A number of figures and images accompany the article.
    Keywords: Chemistry ; Environment ; Limnology ; Profilers ; Inland water environment ; Water reservoirs ; Lakes ; Rivers ; Temperature data ; Electrical conductivity ; Dissolved oxygen ; Depth measurement ; Light attenuation ; Annual reports ; England ; Lake District
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    The growth of brown trout (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5117 | 3949 | 2011-09-29 15:22:21 | 5117 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-08
    Description: An article discussing the factors affecting the rate of growth of brown trout, detailing the research udnertaken at Wray Castle, designed to clarify the influencing factors in different waters and investigate what would be required to increase their size. The article considers factors such as alkalinity, total hardness, the presence of coarse fish in the waterbodies and competition for food. Previous work undertaken on brown trout in Ireland by other authors is reviewed. A figure showing average growth rate of brown trout in five lakes, as determined from their scales (Lough Derg, Windermere, Loch Leven, Ullswater, Haweswater).
    Keywords: Biology ; Chemistry ; Limnology ; Coarse fish ; pH effects ; Water hardness ; Food availability ; Limnology ; England ; Lake District
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    The Chironomidae and their ecology in chalk streams (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5169 | 3949 | 2011-09-29 15:18:45 | 5169 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-08
    Description: The taxonomy of the family Chironomidae is first discussed in this article, since there is considerable confusion over nomenclature. The author goes on to consider various aspects of the ecology of the family in chalk streams; preliminary studies on a reach of the Tadnoll Brook supplying most of the information.
    Keywords: Biology ; Ecology ; Ecological distribution ; Taxonomy ; Chironomidae ; England ; Dorset ; Annual report
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  • 83
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    Variation in bacterial populations in time and space (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5168 | 3949 | 2011-09-29 15:18:43 | 5168 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-08
    Description: Obtaining a reliable estimate of the bacterial population is one of the main problems facing the bacterial ecologist. The author discusses the various methods available and concludes that the observed variability in bacterial populations depends on the sampling interval used.
    Keywords: Biology ; Ecology ; Bacteria ; Biomass ; Population characteristics ; Population number ; Annual report
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    The atyid prawns of Dominica (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5167 | 3949 | 2011-09-29 15:18:42 | 5167 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-08
    Description: The family of primitive prawns, Atyidae, are freshwater animals with a circumtropical distribution, but additionally some have penetrated into temperate regions. An intriguing aspect of their distribution is that, although they are, and have long been, freshwater crustaceans, they have succeeded in colonizing many oceanic islands. The West Indies is an area of interest, as representatives of several genera sometimes occur on one island. For its size, Dominica is particularly rich in this respect. The fauna of the island includes the most primitive living atyid (a West Indian endemic, Xiphocaris elongata) and 2 representatives of the most advanced genus, Atya. Each of the other 3 spp belongs to a separate genus. The feeding behaviour of the Dominican atyids is discussed in this article.
    Keywords: Biology ; Ecology ; Biogeography ; Feeding behaviour ; Atyidae ; Dominica ; Annual report
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  • 85
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    Interpreting the environmental record in the sediments of Blelham Tarn (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5166 | 3949 | 2011-09-29 15:18:23 | 5166 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-08
    Description: Two aspects of the environmental record in the sediments of Blelham Tarn have been investigated: (1) the ecological history of the catchment, and lake-catchment relationships, by detailed analysis of the preserved pollen (as an indication of vegetation) and sediment composition with respect to a range of inorganic and organic geochemical variables and (2) a detailed investigation of the manner in which sediment is being formed today, including the way in which microfossils (pollen and diatoms) are being recruited and incorporated into sediments. When the record was examined by biological and geochemical analysis, together with radionuclide dating, of closely spaced samples, it was found that the changes of the last 30 yrs represented only the most recent episode in a long history of modification of the lake by man. To find an approach to this it is necessary to go back for at least 2500 yrs.
    Keywords: Biology ; Ecology ; Limnology ; Environmental conditions ; Sediment analysis ; Sediment sampling ; Sediment-water interface ; Unconsolidated sediments ; England ; Lake District ; Annual report
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    The impact of Cow Green Reservoir on invertebrate populations in the River Tees (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5173 | 3949 | 2011-09-29 15:19:07 | 5173 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-08
    Description: Cow Green is a new reservoir situated in Pennine moorland. It has an area of 312 ha, a capacity of 40 . 9 x 10 SUP-6 m SUP-3 and a maximum depth of 22 . 8 m. The function of the reservoir is to regulate flow in the River Tees to provide industrial Teesside with sufficient water during the dry spells. Invertebrate studies were carried out in the Tees to monitor changes resulting from the construction of the reservoir both in the flooded basin and below the dam. The overall effect of the reservoir on the Tees has been to increase the numbers and biomass of certain taxa, but generally not at the expense of previous fauna. Some of the positive effects, ie. increase in number and biomass, and maintenance of faunal diversity, may in part be attributable to the presence of the rapids and waterfall. Turbulence resulting from this rapid flow over heterogeneous bottom is sufficient to prevent clogging of interstitial spaces by silt and to maintain the variety of ecological niches necessary for a diverse fauna.
    Keywords: Biology ; Ecology ; Limnology ; Reservoirs ; Invertebrate zoology ; Environmental effects ; River Tees ; Annual report
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    The first fifty years of the Freshwater Biological Association (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5176 | 3949 | 2011-09-29 15:19:21 | 5176 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: A brief history of the Freshwater Biological Association is given in this article. The association has been in existence for fifty years, having been founded in 1929.
    Keywords: Biology ; Planning ; Research institutions ; Historical account ; England ; Lake District ; Annual report
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    Fungal and protozoan parasites and their importance in the ecology of the phytoplankton (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5177 | 3949 | 2011-09-29 15:19:29 | 5177 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: The presence of fungi on the phytoplankton of Lake Windermere was first noted by the author in 1943. Surveys into the fungal and protozoan parasites of the planktonic algae of the English Lake District and elsewhere were carried out. This article discusses the descriptive studies, epidemics and culture work, which was carried out in connection with these studies.
    Keywords: Biology ; Planning ; Parasites ; Fungal diseases ; Protozoan diseases ; Phytoplankton ; England ; Lake District ; Annual report
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    Ceratium hirundinella - ecology of a complex, mobile, and successful plant (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5180 | 3949 | 2011-09-29 15:17:07 | 5180 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: Recent work carried out in the English Lake District (Esthwaite Water and Blelham Tarn) is reported. The seasonal growth cycle, diel growth cycle, photosynthesis, vertical distribution and migrations, horizontal distribution, and the interaction of environmental factors, were investigated.
    Keywords: Biology ; Ecology ; Freshwater Ecology ; Life History ; Ceratium hirundinella ; England ; Lake District ; Annual report
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  • 90
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    Ranunculus calcareus and its role in lowland streams (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5179 | 3949 | 2011-09-29 15:17:05 | 5179 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: Ranunculus calcareus , a species of water crowfoot which occurs in clear, nutrient-rich chalk streams, was studied. Seasonal changes in its biomass, its annual production and its fragmentation (leading to downstream movement of the plant) were investigated. From an understanding of the growth rate and requirements of plants such as these, an indirect method of management can be devised, which does not have the undesirable consequences of the direct methods (such as cutting).
    Keywords: Biology ; Ecology ; Resource management ; Growth ; Environmental conditions ; Rivers ; Ranunculus calcareus ; Annual report
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    Saprolegnia infections of salmonid fish (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5186 | 3949 | 2011-09-29 15:17:37 | 5186 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: This paper deals firstly with the identification and characteristics of fungal pathogens that colonize salmonids and then considers the relative importance of the condition of the host fish and the environmental factors which may influence the interaction between pathogen and host.
    Keywords: Biology ; Ecology ; Fish diseases ; Freshwater fish ; Fungal diseases ; Game fish ; Salmonidae ; Annual report
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    The bullhead Cottus gobio , a versatile and successful fish (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5191 | 3949 | 2011-09-29 15:14:59 | 5191 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: A series of studies on the ecology of the bullhead, Cottus gobio is described. Habitat choice, growth rate and longevity, population density, biomass and production, reproduction, life history and feeding is compared at 8 sites in England and 1 site in Wales. Evidence suggests that in Cottus gobio the prevailing environmental conditions result in considerable modifications in longevity, growth rate and egg production. It also indicates that the advantages of fast growth and high reproductive effort in favourable habitats are offset, at least partially by increases in mortality.
    Keywords: Biology ; Ecology ; Biomass ; Ecology ; Fresh water ; Growth ; Habitat ; Life history ; Longevity ; Mortality ; Population desnity ; Reproduction ; Cottus gobio ; England ; River Brathay ; River Tees ; Lake Windermere ; River Llafar ; Annual report
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    Growth rates of bacteria in rivers (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5184 | 3949 | 2011-09-29 15:17:22 | 5184 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: Three different methods for determining bacterial growth rate in rivers are described. Two of the methods are for bacteria in suspension: a recirculating experimental channel method and a radioactive tracer technique using super(35)SO sub(4). The third method is for bacteria attached to surfaces and specifically considers the surface of the common duckweed Lemna minor).
    Keywords: Biology ; Ecology ; Bacteria ; Growth ; Nannoplankton ; Rivers ; Lemna minor ; England ; Dorset ; River Frome ; Annual report
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    Acid precipitation and its effects on aquatic systems in the English Lake District (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5189 | 3949 | 2011-09-29 15:16:49 | 5189 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: There is no evidence of an increase in the acidity (lower pH or alkalinity) of water-bodies in the Lake District over the last 50 years. Brown trout occur in acid streams and upland tarns where pH is 4.5-5.2 throughout the year. Their occurrence in such waters in Britain and Ireland has been known for most of this century and there is no previous evidence of harmful effects on salmonid fisheries, though numbers of fish are naturally low. However, many benthic invertebrates that are common in hill-streams where pH is above 5.7 do not occur in more acid streams. This phenomenon occurs in the headwaters of several western rivers in Cumbria. It is not a recent response to "acid rain". Harmful effects of pH are undoubtedly more pronounced in waters that are poor in other dissolved ions. Low concentrations of sodium, potassium, calcium and chloride are especially important and may limit the distributions of some aquatic animals even where pH is above 5.7. The concentration of sulphate ions is usually relatively high but this is not important to the fauna; concentrations are at least two times higher in productive alkaline water-bodies than they are in unproductive acid waters.
    Keywords: Chemistry ; Ecology ; Limnology ; Acid rain ; Acidification ; Alkalinity ; Freshwater pollution ; pH ; Pollution effects ; Invertebrata ; Salmonidae ; England ; Lake District ; Annual report
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    The Freshwater Biological Association and the International Biological Programme (1961-1976) (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5183 | 3949 | 2011-09-29 15:17:20 | 5183 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: The involvement of the FBA in the primary productivity program is reviewed.
    Keywords: Biology ; Management ; Research programmes ; Primary production ; England ; Lake District ; Annual report
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    Studies of chemical speciation in naturally anoxic basins (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5181 | 3949 | 2011-09-29 15:17:17 | 5181 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: The chemical speciation of both metals and non-metals, the use of polarographic techniques, and application to the study of the chemistry of anoxic waters are considered. In the first part of the paper unfamiliar terminology is explained and then an example of simple lake chemistry is presented to illustrate why the concept of speciation is necessary.
    Keywords: Chemistry ; Limnology ; Chemical speciation ; Anoxic basins ; Annual report
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    Organic detritus and its role as a food source in chalk streams (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5185 | 3949 | 2011-09-29 15:17:36 | 5185 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: This review deals with the variation in populations of invertebrates and the relationships between invertebrate production and detrital food material in chalk streams. The total quantity of detrital material processed by invertebrate consumers is many times greater than the production of these consumers. The amount of detritus ingested each year by chalk stream invertebrates may well be similar to the annual input of autochthonous primary production plus that from allochthonous tree cover.
    Keywords: Biology ; Ecology ; Detritus feeders ; Invertebrate zoology ; Rivers ; Secondary production ; Invertebrata ; Annual report
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    Population dynamics of Windermere perch (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5187 | 3949 | 2011-09-29 15:17:39 | 5187 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: This paper looks briefly at some of the more recent analyses and interpretations of the changes that have occurred in the population dynamics of Windermere perch and at the present level of understanding. The long-term study has shown how flexible the population is and how it has behaved in different ways over successive periods of time since 1939. Through one of these periods it was possible to account for nearly all the variance in recruitment by a relatively simple explanatory model. The reduction in numbers on the outbreak of disease in 1976 started a natural experiment which will form a baseline for future studies.
    Keywords: Biology ; Ecology ; Limnology ; Coarse fish ; Freshwater fish ; Freshwater lakes ; Mathematical models ; Population dynamics ; Perca fluviatilis ; England ; Lake District ; Windermere ; Annual report
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    Water chemistry and osmoregulation in some arthropods, especially Malacostraca (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5174 | 3949 | 2011-09-29 15:19:09 | 5174 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-08
    Description: This article briefly summarises some chief characteristics of osmoregulatory systems in malacostracan crustaceans, evolved to combat hydration, and the limitations thereby imposed on the salinity tolerance and distribution of these animals.
    Keywords: Biology ; Ecology ; Osmoregulation ; Malacostraca ; Annual report
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    Phytoplankton periodicity: its motivation, mechanisms and manipulation (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5188 | 3949 | 2011-09-29 15:17:41 | 5188 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-09
    Description: This review summarizes some recent work to find a generalized explanation of phytoplankton periodicity in lakes. Much of the observational and experimental evidence is drawn from work centred on the large enclosures (Lund Tubes) installed in Blelham Tarn, English Lake District. Observations on the phytoplankton in the tubes are related to the periodic changes that occur in natural lakes and it is suggested that such changes have common patterns, that they are due to common causes, that they are affected by similar processes and that they are therefore predictable and, potentially, manipulable.
    Keywords: Biology ; Ecology ; Limnology ; Freshwater fish ; Growth ; Periodicity ; Phytoplankton ; Prediction ; England ; Lake District ; Annual report
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