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  • 1
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    Influence of water temperature on the efficacy of diquat and endothall versus curlyleaf pondweed (2021)
    In:  http://aquaticcommons.org/id/eprint/1805 | 3 | 2011-09-29 20:01:54 | 1805 | Aquatic Plant Management Society, Inc.
    Details
    Publication Date: 2021-07-10
    Description: determine the impact of water temperature on the efficacyof the contact herbicides diquat (6,7-dihydrodipyrido [1,2-α:2’,1’-c] pyrazinediium ion) and endothall (7-oxabicyclo[2.2.1] heptane-2,3-dicarboxylic acid) for control of the exoticnuisance species curlyleaf pondweed (Potamogeton crispus L.)across a range of water temperatures.
    Keywords: Management ; Biology ; Limnology ; Potamogeton crispus ; herbicide ; chemical control ; Aquathol K™ ; Reward™ ; Curlyleaf pondweed
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 25-32
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  • 2
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    Impact Assesment of ionising Radiation on Wildlife (2021)
    Environment Agency | Bristol, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10946 | 1256 | 2013-03-26 13:59:36 | 10946 | Environment Agency, UK (Freshwater Biological Association)
    Details
    Publication Date: 2021-06-25
    Description: This is the Impact Assessment of ionising Radiation on Wildlife document produced by the Environment Agency in 2001. This report describes the behaviour and transport of radionuclides in the environment, considers the impact of ionising radiation on wildlife, and makes recommendations on an approach for the Impact assessment of ionising radiation on wildlife for England and Wales. The assessment approach focuses on three ecosystems representative of those considered potentially most at risk from the impact of authorised radioactive discharges, namely a coastal grassland (terrestrial ecosystem); estuarine and freshwater ecosystems. The likely scale of the impact on wildlife is also assessed in light of a preliminary analysis based on this assessment approach. The report demonstrates the behaviour and transfer of radionuclides in a number of different ecosystem types. Particular emphasis is placed on exposure pathways in those ecosystems most likely to be impacted by the authorised discharges of radioactivity within England and Wales. The use of biomarker techniques is reviewed in the report, and their application to the study of exposure to multiple contaminants is discussed.
    Description: Environment Agency Archives North West
    Description: + glossary
    Keywords: Fisheries ; Limnology ; Management ; Europe ; UK ; Pollution effects ; Radionuclides ; Biomarker ; Freshwater ; Estuarine ; Coastal grassland
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 222
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  • 3
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    Comparative studies on the structure of an upland African stream ecosystem (2021)
    In:  http://aquaticcommons.org/id/eprint/4686 | 1256 | 2011-09-29 16:05:06 | 4686 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-05
    Description: Upland stream systems have been extensively investigated in Europe, North America and Australasia and many of the central ideas concerning their function are based on these systems. One central paradigm, the river continuum concept is ultimately derived from those North American streams whose catchments remain forested with native vegetation. Streams of the tropics may or may not fit the model. They have been little studied. The Amani Nature Reserve in the East Usambara Mountains of north-eastern Tanzania offers an opportunity to bring these naturally forested systems to the attention of the ecological community. This article describes a comparison made between two lengths of the River Dodwe in this area. The work was carried out by a group of postgraduate students from eighteen European and African countries with advice from five staff members, as part of a course organised by the Tropical Biology Association. Rigorous efforts were made to standardise techniques, in a situation where equipment and laboratory facilities were very basic, through a management structure and deliberate allocation of work to specialists in each area.The article offers a summary of invertebrate communities found in the stream and its biomass. Crabs seem to be the key organism in both sections of the streams.
    Keywords: Ecology ; Limnology ; Freshwater crustaceans ; Taxonomy ; Biomass ; Rivers ; Flood plains ; Site surveys ; Tanzania ; River Dodwe
    Repository Name: AquaDocs
    Type: article , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 27-47
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  • 4
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    Use of telemetric tracking to examine environmental influences on catch/effort indices. A case study of Atlantic Salmon (Salmo salar L.)in the R. Tywi, S. Wales (2021)
    National River Authority Wales | Cardiff, Wales
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/8528 | 1256 | 2013-01-03 23:30:13 | 8528 | Environment Agency, UK (Freshwater Biological Association)
    Details
    Publication Date: 2021-07-03
    Description: A case study of Atlantic Salmon runs into the R. Tyvi (S. Wales) is presented. Radio tracking of over 200 salmon in 1988 and 1989 has demonstrated that flow is an important factor in modifying both run timing and migratorysuccess. Entry of salmon into the river is typically in response to flow events, and periods of low falling flows delay entry and may directly result in reduced runs into the river. Delayed entry may also increase the proportion of the run migrating after the end of both rod and net fishing seasons.The implications of these results for net and rod catch and catch/effort data are discussed, using both statutory reported catch data and data from specific catch/effort studies. Flow is demonstrated to be a dominantfactor in determining the within-season distribution of rod catch and catch/effort during low-flow years. Estuarial seine net catch and catch/effort tend to be controlled more by time of return than by flow although low flows may delay runs. Annual reported rod catch is correlated with flow, which controls in season availability, catchability andconsequently the amount of fishing effort. Use of catch or catch/effort data should take account of inter-year variations in flow and other environmental factors. Although catch and catch/effort are valuable indicators of fishery performance, they are inadequate to representchanging stock levels.
    Description: Environment Agency Archives North West
    Description: + figures
    Keywords: Ecology ; Fisheries ; Limnology ; UK ; Wales ; Rivers ; Salmon fisheries ; Salmo salar ; Tagging ; Tracking ; Stream flow ; Fish catch statistics ; Migrations ; Environmental Monitoring
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 15
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  • 5
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    Acid waters in North West England. The effect of liming agricultural land (2021)
    National Rivers Authority | Warrington, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10961 | 1256 | 2013-03-26 13:55:26 | 10961 | Environment Agency, UK (Freshwater Biological Association)
    Details
    Publication Date: 2021-06-25
    Description: This is the Acid waters in North West England: The effect of liming agricultural land on the chemistry and biology of the River Esk, North West England report produced by National Rivers Authority in 1992. This report focuses on the study of Acid Waters in the North West Region of England, UK, which began in 1982 and sampling was completed in October 1990. This work was initiated because of the observation of the simultaneous mortality of adult and juvenile salmon and sea-trout in both the River Esk and adjacent River Duddon in June 1980. Investigations at that time indicated that an "acid episode" was the most likely cause of this mortality. A land use study indicated that a reduction in agricultural liming may have been a major factor in the development of acid episodes and consequent fish kills in the River Esk and River Duddon. However there was no evidence that the mortalities of salmonids in the early 1980's were due to a reduction in agricultural liming. They were due to some other phenomenon such as a period of intense acid deposition.
    Description: Environment Agency Archives North West
    Description: +appendices
    Keywords: Fisheries ; Limnology ; Management ; England ; North West ; Esk ; Inland waters ; Rivers ; Freshwater pollution ; Freshwater fish ; Migratory species ; Fish counter data ; Mortalities ; Invertebrates ; Acid Waters ; Water quality
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 31
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  • 6
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    The assessment of the flow requirements for upstream migration of salmonids in some rivers of North West England (2021)
    North West Water Authority | Warrington, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10975 | 1256 | 2013-03-26 13:52:48 | 10975 | Environment Agency, UK (Freshwater Biological Association)
    Details
    Publication Date: 2021-06-25
    Description: This is the assessment of the flow requirements for upstream migration of salmonids in some rivers of North West England produced by the North West Water Authority in 1985. This report focuses on the automatic fish counters operating on the resistivity principle used for several years in North West England. This report aims to investigate the flow requirements for upstream migration of salmon and migratory trout. The data obtained confirmed that during summer months most fish movement occurs in the higher range of the available flows, but the migration flow range varied from year to year, depending on prevailing river levels. Of the other environmental variables measured, only water temperature and incident light intensity appear to have any direct association with fish movement. Information on migration flow ranges were used in conjunction with computer simulations of the effects of abstraction proposals on historical flows to assess the implications of these proposals for migratory fish.
    Description: Environment Agency Archives North West
    Description: +1figure
    Keywords: Fisheries ; Limnology ; Management ; England ; North West ; Inland Water ; Rivers ; Fish counters ; Fish populations ; Migratory species ; Water quality
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 10
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  • 7
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    Episodic variations in stream water chemistry associated with acid rainfall and run-off and the effect on aquatic ecosystem, with particular reference to fish populations in N.W. England (2021)
    North West Water Authority | Warrington, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10976 | 1256 | 2013-03-26 13:52:30 | 10976 | Environment Agency, UK (Freshwater Biological Association)
    Details
    Publication Date: 2021-06-25
    Description: This is the episodic variations in stream water chemistry associated with acid rainfall and run-off and the effect on aquatic ecosystems, with particular reference to fish populations in North West England produced by the North West Water Authority in 1985. This report looks at the biological, physical and chemical information collected over a five year period from over 100 sites on upland streams in the North West Region of which drained rocks of low buffering capacity. In both Lake District and South Pennine sites striking differences were found between the composition of invertebrate communities inhabiting acid-stressed and less acid-stressed streams. Electric fishing surveys showed that acidic streams (geometric mean pH 〈5.5) generally had abnormally low densities of salmonids ( 〈 0 .2m2) and that 0+ fish were very few or absent. The latter indicates recruitment failure. Salmon were more sensitive than trout to low pH.
    Description: Environment Agency Archives North West
    Description: +9appendices
    Keywords: Fisheries ; Limnology ; Management ; England ; North West ; Inland Water ; Rivers ; Fish populations ; Migratory species ; Fish counters ; Fish surveys ; Population dynamics ; Mortalities ; Invertebrates ; Acid rainfall ; Freshwater pollution ; Pollution effects ; Water quality ; Water monitoring
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 55
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  • 8
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    River Eden RHS and geomorphology evaluation. Final report October 2001 (2021)
    Environment Agency | UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11096 | 1256 | 2013-04-03 15:31:02 | 11096 | Environment Agency, UK (Freshwater Biological Association)
    Details
    Publication Date: 2021-06-27
    Description: This is the River Eden RHS and geomorphology evaluation: Final report October 2001 produced by the Environment Agency North West in 2001. This report analysed the River Habitat Survey (RHS) and geomorphology data to evaluate the level of habitat quality and the geomorphological characteristics of the River Eden and sub-catchments. RHS data and geomorphological assessment data was collected within the study areas by CEH and Fluvial Environmental Services Ltd. The River Eden and its sub-catchments are being considered as a Special Area for Conservation (SAC) due to the presence of habitat types and species, which are rare or threatened within Europe. The purpose of the project is to provide an overview of the state of the catchment in terms of river habitats and geomorphological processes in order to aid the derivation of sound management for this proposed SAC.The aim of this report was to determine the state of the environment within the Eden and sub-catchments and identify the main pressures on the system in order to derive sound management options.
    Description: Environment Agency Archives North West
    Keywords: Ecology ; Limnology ; Management ; England ; River Eden ; Inland waters ; Rivers ; RHS ; Environmental assessment ; Water quality ; Nature conservation ; Eden Rivers Trust ; English Nature
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 133
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  • 9
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    The Coleopteran fauna of exposed riverine sediments on the River Dane, Cheshire: A survey report (2021)
    Environment Agency | Birmingham, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10615 | 1256 | 2013-04-03 15:24:53 | 10615 | Environment Agency, UK (Freshwater Biological Association)
    Details
    Publication Date: 2021-06-27
    Description: This is the Coleopteran Fauna of ERS on the river Dane, Cheshire: a survey report produced by the Environment Agency in 2003. A comprehensive survey of the Exposed Riverine Sediment (ERS) on the River Dane, Cheshire was undertaken between mid-April and mid-June 2003. 6 locations were selected and subsequently examined to determine the importance of the constituent invertebrate fauna. Appropriate sampling techniques (i.e. pitfall trapping, hand searching and excavations) were directed towards the target group (Coleoptera). All adults from the chosen taxa were identified to species level. The relative value of the fauna was assessed using species richness, conservation status, fidelity score and a site quality index.
    Description: Environment Agency Archives North West
    Description: + appendices
    Keywords: Ecology ; Limnology ; England ; Cheshire ; River Dane ; Inland waters ; Rivers ; Freshwater fishes ; Invertebrate larvae ; ERS ; Environmental assessment ; Water quality ; Species richness ; Conservation status ; Fidelity score ; Site Quality Index
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 29
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  • 10
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    Centennial oscillation of the climatic crescendo during the last glacial maximum: evidence from Lake Estancia, central New Mexico (2021)
    In:  http://aquaticcommons.org/id/eprint/15627 | 8 | 2014-11-13 19:11:57 | 15627
    Details
    Publication Date: 2021-07-09
    Description: Sediments deposited in late Pleistocene Lake Estancia, central New Mexico, contain a paleoclimatic record that includes the last glacial maximum and deglacial episode. Stratigraphic reconstruction of an interval representing the highstand of the lake that occurred during the last glacial maximum reveals ~2000-, ~600-, and ~200-year oscillations in lake level and climate. Shifting position of the polar jetstream in response to expansion and contraction of the North American ice sheet may be partly responsible for the millenial-scale changes in Lake Estancia but probably does not explain the centennial-scale oscillations.
    Keywords: Atmospheric Sciences ; Earth Sciences ; Limnology ; PACLIM
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 13-18
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