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  • 1
    Online Resource
    Online Resource
    Cyprinid Fishes : Systematics, Biology and Exploitation. (1991)
    Dordrecht :Springer Netherlands,
    Details
    Keywords: Cyprinidae. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (687 pages)
    Edition: 1st ed.
    ISBN: 9789401130929
    Series Statement: Fish and Fisheries Series ; v.3
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=6497634
    DDC: 597.52
    Language: English
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  • 2
    Book
    Book
    Cyprinid fishes : systematics, biology and exploitation (1991)
    London [u.a.] : Chapman & Hall
    Details Availability
    Keywords: Fish ; Karpfenfische ; Karpfenfische ; Fischerei ; Karpfenfische ; Aquakultur ; Biologie
    Type of Medium: Book
    Pages: XXII, 667 S. , Ill., graph. Darst., Kt.
    Edition: 1. ed.
    ISBN: 0442312318 , 0412349205
    Series Statement: Fish and fisheries series 3
    DDC: 597.52
    RVK:
    WR 4200
    Language: English
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  • 3
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    Phenological sensitivity to climate across taxa and trophic levels (2016)
    Nature Publishing Group (NPG)
    In: Nature
    Details
    Publication Date: 2016-07-14
    Description: Phenological sensitivity to climate across taxa and trophic levels Nature 535, 7611 (2016). doi:10.1038/nature18608 Authors: Stephen J. Thackeray, Peter A. Henrys, Deborah Hemming, James R. Bell, Marc S. Botham, Sarah Burthe, Pierre Helaouet, David G. Johns, Ian D. Jones, David I. Leech, Eleanor B. Mackay, Dario Massimino, Sian Atkinson, Philip J. Bacon, Tom M. Brereton, Laurence Carvalho, Tim H. Clutton-Brock, Callan Duck, Martin Edwards, J. Malcolm Elliott, Stephen J. G. Hall, Richard Harrington, James W. Pearce-Higgins, Toke T. Høye, Loeske E. B. Kruuk, Josephine M. Pemberton, Tim H. Sparks, Paul M. Thompson, Ian White, Ian J. Winfield & Sarah Wanless Differences in phenological responses to climate change among species can desynchronise ecological interactions and thereby threaten ecosystem function. To assess these threats, we must quantify the relative impact of climate change on species at different trophic levels. Here, we apply a Climate Sensitivity Profile approach
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 4
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    Two hearts are better than one: encouraging collaboration between freshwater fish conservation and freshwater fisheries management (2016)
    Wiley-Blackwell
    Details
    Publication Date: 2016-12-24
    Print ISSN: 1052-7613
    Electronic ISSN: 1099-0755
    Topics: Biology
    Published by Wiley-Blackwell
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  • 5
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    Biological conservation of aquatic inland habitats: these are better days (2014)
    PAGEPress
    Details
    Publication Date: 2014-05-10
    Description: The biodiversity of aquatic inland habitats currently faces unprecedented threats from human activities. At the same time, although much is known about the functioning of freshwater ecosystems the successful transfer of such knowledge to practical conservation has not been universal. Global awareness of aquatic conservation issues is also hampered by the fact that conditions under the water surface are largely hidden from the direct experience of most members of society. Connectivity, or lack of it, is another challenge to the conservation of freshwater habitats, while urban areas can play a perhaps unexpectedly important positive role. Freshwater habitats frequently enjoy benefits accruing from a sense of ownership or stewardship by local inhabitants, which has led to the development of conservation movements which commonly started life centred on the aquatic inland habitat itself but of which many have now matured into wider catchment-based conservation programmes. A demonstrable need for evidence-based conservation management in turn requires scientific assessments to be increasingly robust and standardised, while at the same time remaining open to the adoption of technological advances and welcoming the rapidly developing citizen science movement. There is evidence of real progress in this context and conservation scientists are now communicating their findings to environmental managers in a way and on a scale that was rarely seen a couple of decades ago. It is only in this way that scientific knowledge can be efficiently transferred to conservation planning, prioritisation and ultimately management in an increasingly scaled-up, joined-up and resource-limited world. The principle of ‘prevention is better than cure’ is particularly appropriate to most biological conservation issues in aquatic inland habitats and is inextricably linked to educating and/or nudging appropriate human behaviours. When prevention fails, some form of emergency rescue such as captive breeding or translocations may be justified for particularly important animal or plant populations. However, long-haul missions of habitat rehabilitation or restoration are generally to be preferred even if they usually take many years if not decades to reach fruition. Conservation researchers, managers and practitioners must be realistic in their objectives and timescales for such programmes and take positive steps to communicate such information to stakeholders. Now more than ever, people are interested in conservation and sustainability. There are substantial challenges ahead, but these are better days for the biological conservation of aquatic inland habitats.
    Print ISSN: 1129-5767
    Electronic ISSN: 1723-8633
    Topics: Biology
    Published by PAGEPress
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  • 6
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    Fisheries impacts on lake ecosystem structure in the context of a changing climate and trophic state (2018)
    PAGEPress
    Details
    Publication Date: 2018-03-20
    Description: Through cascading effects within lake food webs, commercial and recreational fisheries may indirectly affect the abundances of organisms at lower trophic levels, such as phytoplankton, even if they are not directly consumed. So far, interactive effects of fisheries, changing trophic state and climate upon lake ecosystems have been largely overlooked. Here we analyse case studies from five European lake basins of differing trophic states (Lake Võrtsjärv, two basins of Windermere, Lake Geneva and Lake Maggiore) with long-term limnological and fisheries data. Decreasing phosphorus concentrations (re-oligotrophication) and increasing water temperatures have been reported in all five lake basins, while phytoplankton concentration has decreased only slightly or even increased in some cases. To examine possible ecosystem-scale effects of fisheries, we analysed correlations between fish and fisheries data, and other food web components and environmental factors. Re-oligotrophication over different ranges of the trophic scale induced different fish responsesIn the deeper lakes Geneva and Maggiore, we found a stronger link between phytoplankton and planktivorous fish and thus a more important cascading top-down effect than in other lakes. This connection makes careful ecosystem-based fisheries management extremely important for maintaining high water quality in such systems. We also demonstrated that increasing water temperature might favour piscivores at low phosphorus loading, but suppresses them at high phosphorus loading and might thus either enhance or diminish the cascading top-down control over phytoplankton with strong implications for water quality.
    Print ISSN: 1129-5767
    Electronic ISSN: 1723-8633
    Topics: Biology
    Published by PAGEPress
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  • 7
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    Fish hydroacoustic survey standardization: A step forward based on comparisons of methods and systems from vertical surveys of a large deep lake (2017)
    Wiley-Blackwell
    Details
    Publication Date: 2017-08-04
    Description: Hydroacoustic methods are routinely used for fish population assessment and monitoring in lakes and reservoirs around the world and are particularly embedded in European and North American lake management. However, the comparability of hydroacoustic results can be difficult to assess due to the large number of variables (sound frequency, sound pulse duration, system manufacturer, analysis method, etc.) that can influence acoustic estimates. This study investigates the effect of variations in analysis method and hydroacoustic system on commonly produced outputs. Volume backscattering strength ( S v ), mean target strength (TS), fish abundance, and biomass were estimated using two analysis methods (echo integration and track-counting) using data recorded from a large, deep lake (Windermere, UK) by four vertically oriented split-beam systems operating at three sound frequencies (120 kHz, 200 kHz, and 400 kHz). The two analysis methods used produced similar estimates of fish abundance and fish biomass. We therefore concluded that echo integration and track-counting can be robustly used and outputs justifiably compared under the conditions of the Windermere surveys. In addition, we compared mean S v , mean TS, fish abundance, and biomass estimates across the four hydroacoustic systems. The only significant result was for abundance estimates, however, the system made a small contribution to the overall variability. All four systems provided similar results for the other metrics, demonstrating that independent hydroacoustic surveys operating within the European Standard can make a major contribution to the assessment and monitoring of fish populations in deep lakes and reservoirs.
    Electronic ISSN: 1541-5856
    Topics: Biology , Geosciences
    Published by Wiley-Blackwell on behalf of The Association for the Sciences of Limnology and Oceanography (ASLO).
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  • 8
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    Food web de-synchronisation in England's largest lake: an assessment based upon multiple phenological metrics (2013)
    Wiley-Blackwell
    Details
    Publication Date: 2013-07-20
    Description: Phenological changes have been observed globally for marine, freshwater and terrestrial species, and are an important element of the global biological “fingerprint” of climate change. Differences in rates of change could de-synchronise seasonal species interactions within a food web, threatening ecosystem functioning. Quantification of this risk is hampered by the rarity of long-term data for multiple interacting species from the same ecosystem and by the diversity of possible phenological metrics, which vary in their ecological relevance to food web interactions. We compare phenological change for phytoplankton (chlorophyll a ), zooplankton ( Daphnia ) and fish (perch, Perca fluviatilis ) in two basins of Windermere over 40 years and determine whether change has differed among trophic levels, while explicitly accounting for among-metric differences in rates of change. Though rates of change differed markedly among the nine metrics used, seasonal events shifted earlier for all metrics and trophic levels: zooplankton advanced most, and fish least, rapidly. Evidence of altered synchrony was found in both lake basins, when combining information from all phenological metrics. However, comparisons based upon single metrics did not consistently detect this signal. A multi-metric approach showed that, across trophic levels, earlier phenological events have been associated with increasing water temperature. However, for phytoplankton and zooplankton, phenological change was also associated with changes in resource availability. Lower silicate, and higher phosphorus, concentrations were associated with earlier phytoplankton growth, and earlier phytoplankton growth was associated with earlier zooplankton growth. The developing trophic mismatch detected between the dominant fish species in Windermere and important zooplankton food resources may ultimately affect fish survival and portend significant impacts upon ecosystem functioning. We advocate that future studies on phenological synchrony combine data from multiple phenological metrics, to increase confidence in assessments of change and likely ecological consequences. This article is protected by copyright. All rights reserved.
    Print ISSN: 1354-1013
    Electronic ISSN: 1365-2486
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Geography
    Published by Wiley-Blackwell
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  • 9
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    Fish conservation in freshwater and marine realms: status, threats and management (2016)
    Wiley-Blackwell
    Details
    Publication Date: 2016-09-29
    Description: Despite the disparities in size and volume of marine and freshwater realms, a strikingly similar number of species is found in each – with 15 150 Actinopterygian fishes in fresh water and 14 740 in the marine realm. Their ecological and societal values are widely recognized yet many marine and freshwater fishes increasingly risk local, regional or global extinction. The prevailing threats in aquatic systems are habitat loss and degradation, invasive species, pollution, over-exploitation and climate change. Unpredictable synergies with climate change greatly complicate the impacts of other stressors that threaten many marine and freshwater fishes. Isolated and fragmented habitats typically present the most challenging environments for small, specialized freshwater and marine fishes, whereas overfishing is by far the greatest threat to larger marine and freshwater species. Species that migrate within or between freshwater and marine realms may face high catchability in predictable migration bottlenecks, and degradation of breeding habitat, feeding habitat or the intervening migration corridors. Conservation reserves are vital to protect species-rich habitats, important radiations, and threatened endemic species. Integration of processes that connect terrestrial, freshwater and marine protected areas promises more effective conservation outcomes than disconnected reserves. Diadromous species in particular require more attention in aquatic restoration and conservation planning across disparate government agencies. Human activities and stressors that increasingly threaten freshwater and marine fishes must be curbed to avoid a wave of extinctions. Freshwater recovery programmes range from plans for individual species to recovery of entire basin faunas. Reducing risks to threatened marine species in coastal habitats also requires conservation actions at multiple scales. Most of the world's larger economically important fisheries are relatively well-monitored and well-managed but there are urgent needs to curb fishing mortality and minimize catch of the most endangered species in both realms. Copyright © 2016 John Wiley & Sons, Ltd.
    Print ISSN: 1052-7613
    Electronic ISSN: 1099-0755
    Topics: Biology
    Published by Wiley-Blackwell
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  • 10
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    First observations of anthropogenic underwater noise in a large multi-use lake (2016)
    PAGEPress
    Details
    Publication Date: 2016-10-05
    Description: Over the last fifty years, anthropogenic noise has increased dramatically in aquatic environments and is now recognised as a chronic form of pollution in coastal waters. However, this form of pollution has been largely neglected in inland water bodies. To date, very few studies have investigated the noise spectra in freshwater environments and at present no legislation exists to protect freshwater organisms from anthropogenic noise. The present study represents the first assessment of anthropogenic noise pollution in a large multi-use lake by characterising noise levels of the main ferry landings of the lake of Windermere, UK using Passive Acoustic Monitoring (PAM). During November 2014, acoustic samples (10 min long) were collected from such areas using a calibrated omni-directional hydrophone and their spectral content was analysed in 1/3 octave bands (dB re 1 µPa). Results indicate that the current noise levels in Windermere warrant further investigation as a potential threat to the fish community which occurs in this already delicate and pressured habitat. Based on results obtained, it is recommended that further studies focus on a wider geographical and temporal range in order to start to fill the knowledge and legislative gaps regarding anthropogenic noise monitoring in fresh waters. 
    Print ISSN: 1129-5767
    Electronic ISSN: 1723-8633
    Topics: Biology
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