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Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Fish habitat improvement Victoria"

1

Mameri, Daniel, Corina van Kammen, Ton G. G. Groothuis, Ole Seehausen, and Martine E. Maan. "Visual adaptation and microhabitat choice in Lake Victoria cichlid fish." Royal Society Open Science 6, no. 3 (March 2019): 181876. http://dx.doi.org/10.1098/rsos.181876.

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When different genotypes choose different habitats to better match their phenotypes, genetic differentiation within a population may be promoted. Mating within those habitats may subsequently contribute to reproductive isolation. In cichlid fish, visual adaptation to alternative visual environments is hypothesized to contribute to speciation. Here, we investigated whether variation in visual sensitivity causes different visual habitat preferences, using two closely related cichlid species that occur at different but overlapping water depths in Lake Victoria and that differ in visual perception ( Pundamilia spp.). In addition to species differences, we explored potential effects of visual plasticity, by rearing fish in two different light conditions: broad-spectrum (mimicking shallow water) and red-shifted (mimicking deeper waters). Contrary to expectations, fish did not prefer the light environment that mimicked their typical natural habitat. Instead, we found an overall preference for the broad-spectrum environment. We also found a transient influence of the rearing condition, indicating that the assessment of microhabitat preference requires repeated testing to control for familiarity effects. Together, our results show that cichlid fish exert visual habitat preference but do not support straightforward visual habitat matching.
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2

Bassa, Samuel, Dickson Oteino Owiti, Eric Ogello, Albert Getabu, Levi Ivor Muhoozi, Herbert Nakiyende, Winnie Nkalubo, et al. "Ecosystem Integrity of the Upper Victoria Nile in East Africa based on Habitat and Fish Species Biotic Indices." Uganda Journal of Agricultural Sciences 19, no. 1 (November 5, 2020): 33–49. http://dx.doi.org/10.4314/ujas.v19i1.4.

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Riverine ecosystems are continuously been compromised by human activities resulting in threatening their integrity. In this study, integrity of Upper Victoria Nile River was assessed using habitat quality and fish biotic indices. Experimental gillnetting was done bi-annually in 9 stations along the river from 2008 to 2018. Nine habitat metrics were used to estimate habitat quality index at every sampling station. Fish sampled, were sorted, identified to species level, and weighed. Counts of introduced and indigenous as well as tolerant and intolerant species were recorded to generate species richness. A total of 10.642 fish, 65 species belonging to nine families were recorded. Dominant species were Lates niloticus 62.79%, Oreochromis niloticus 23.51%, Mormyrus kannume 13.64%; other species were ≤0.06%. Tolerance and trophic guild showed carnivores (61.5%), omnivores (21.5%) and detrivores (16.9%).Mean habitat quality index, total fish catch and fish-based index of biotic integrity varied among stations with highest record of 26.6±6.9, 289.2±51.8 and 30.6±7.9 at sampling station (ST4) respectively. The lowest was 19.4±7.3, 93.1±13.2 and 26.7±6.8 at sampling station (ST2) respectively. On a spatial basis, indices recorded significant differences among stations (p < 0.05). Results indicated a fair fisheries biodiversity that need better conservation management of habitat type of the upper Nile.
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3

Pollino, Carmel A., Pat Feehan, Michael R. Grace, and Barry T. Hart. "Fish communities and habitat changes in the highly modified Goulburn Catchment, Victoria, Australia." Marine and Freshwater Research 55, no. 8 (2004): 769. http://dx.doi.org/10.1071/mf03180.

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Evidence for the decline in native fish communities in the lowland Goulburn Catchment has been based primarily on studies investigating changes to environmental conditions as a result of river regulation. The present study aggregates historical fisheries data to spatially compare native fish communities in different parts of the catchment. Multivariate analyses demonstrate that distinctly different community compositions are found in different parts of the catchment. Eildon Dam, a deep release reservoir, has drastically altered the hydrology and water quality of the upper Goulburn River, and ordination analyses show that this has created both physical and artificial barriers to movement of native fish into the main channel. Concurrently, fisheries data from the upper main channel show the community is highly divergent compared to the remaining catchment. Further downstream, Goulburn Weir creates a barrier to fish movement between Lake Nagambie and the lower Goulburn Catchment, and alters the natural hydrological regime. Similarity Percentage analyses demonstrate that these stressors have facilitated the establishment of alien species, which dominate fish abundance in the upper and lower main channels. The current study emphasises the need to explore alternatives for improving management strategies to rehabilitate fish communities throughout the Goulburn Catchment.
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4

Dinelka Thilakarathne and Gayan Hirimuthugoda. "Can the Sri Lankan endemic-endangered fish Labeo fisheri (Teleostei: Cyprinidae) adapt to a new habitat?" Journal of Threatened Taxa 14, no. 8 (August 26, 2022): 21579–87. http://dx.doi.org/10.11609/jott.7621.14.8.21579-21587.

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Labeo fisheri is an endemic and endangered freshwater fish of Sri Lanka. Mainly restricted to the upper reaches of the Mahaweli River basin, it has been previously reported living in deep rapids and among large rocks and boulders. An accidental record of a Labeo fisheri specimen from Victoria Reservoir led us to further study this habitat during the period from January to August 2017. This study was carried out to confirm the presence of a population of Labeo fisheri within the Victoria Reservoir and report its new habitat type in deep stagnant waters. We further investigated the food habits by analyzing the gut contents of L. fisheri in the Victoria Reservoir. Seven individuals were recorded from fishermen’s gill net catch in three fish landing sites along Victoria Reservoir, with an average total length of 24.80 ± 4.30 cm, average standard length of 19.70 ± 3.86 cm and average body weight of 197.69 ± 107.12 g. Based on gut content analysis, only phytoplankton, especially diatoms and cyanobacteria, were found in the gut of L. fisheri. This new population is facing the direct threat of fishing. Effective conservation measures are doubtful, since a fishery is well established in the Victoria Reservoir and the fishing gear used is not species-specific. More research is necessary to understand the population dynamics of L. fisheri in the Victoria Reservoir. In order to conserve it at this locality, community-based conservation measures are recommended.
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5

Morris, Liz, and David Ball. "Habitat suitability modelling of economically important fish species with commercial fisheries data." ICES Journal of Marine Science 63, no. 9 (January 1, 2006): 1590–603. http://dx.doi.org/10.1016/j.icesjms.2006.06.008.

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Abstract In this study we used catch and effort data from a commercial fishery to generate habitat suitability models for Port Phillip Bay, Victoria, Australia. Species modelled were King George whiting (Sillaginodes punctata), greenback flounder (Rhombosolea tapirina), Australian salmon (Arripis trutta and A. truttaceus), and snapper (Pagrus auratus). Locations of commercial catches were reported through a grid system of fishing blocks. Spatial analyses in a Geographic Information System (GIS) were applied to describe each fishing block by its habitat area. A multivariate approach was adopted to group each fishing block by its dominant habitats. Standardized catch per unit effort values were overlaid on these groups to identify those that returned high or low catches for each species. A simple set of rules was then devised to predict the habitat suitability for each habitat combination in a fishing block. The spatial distribution of these habitats was presented in a GIS. These habitat suitability models were consistent with existing anecdotal information and expert opinion. While the models require testing, we have shown that in the absence of adequate fishery-independent data, commercial catch and effort data can be used to produce habitat suitability models at a bay-wide scale.
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6

Slawski, Thomas M., and Timothy J. Ehlinger. "Fish Habitat Improvement in Box Culverts: Management in the Dark?" North American Journal of Fisheries Management 18, no. 3 (August 1998): 676–85. http://dx.doi.org/10.1577/1548-8675(1998)018<0676:fhiibc>2.0.co;2.

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7

Brittain, John E., Jon Arne Eie, Age Brabrand, Svein Jakob Saltveit, and Jan Heggenes. "Improvement of fish habitat in a Norwegian river channelization scheme." Regulated Rivers: Research & Management 8, no. 1-2 (May 1993): 189–94. http://dx.doi.org/10.1002/rrr.3450080121.

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8

Rodwell, Lynda D., Edward B. Barbier, Callum M. Roberts, and Tim R. McClanahan. "The importance of habitat quality for marine reserve – fishery linkages." Canadian Journal of Fisheries and Aquatic Sciences 60, no. 2 (February 1, 2003): 171–81. http://dx.doi.org/10.1139/f03-009.

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We model marine reserve – fishery linkages to evaluate the potential contribution of habitat-quality improvements inside a marine reserve to fish productivity and fishery catches. Data from Mombasa Marine National Park, Kenya, and the adjacent fishery are used. Marine reserves increase total fish biomass directly by providing refuge from exploitation and indirectly by improving fish habitat in the reserve. As natural mortality of the fish stock decreases in response to habitat enhancement in the reserve, catches increase by up to 2.6 tonnes (t)·km–2·year–1 and total fish biomass by up to 36 t·km–2. However, if habitat-quality improvement reduces the propensity of fish to move out of the reserve, catches may fall by up to 0.9 t·km–2·year–1. Our results indicate that habitat protection in reserves can underpin fish productivity and, depending on its effects on fish movements, augment catches.
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9

Colton, Madhavi A., and Stephen E. Swearer. "Locating faunal breaks in the nearshore fish assemblage of Victoria, Australia." Marine and Freshwater Research 63, no. 3 (2012): 218. http://dx.doi.org/10.1071/mf10322.

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Marine communities are frequently biogeographically structured, despite the potential for dispersal. Previous research on a variety of marine taxa in south-eastern Australia has suggested that a biogeographic break occurs along the coastline of Victoria. However, little of this research has focussed on nearshore ichthyofauna and the location of the break remains debated. Using fish abundance measured by two methods: underwater visual census (UVC); and baited remote underwater video (BRUV) at six locations along the open coast of Victoria, we examined (1) whether there is sufficient concordance among species to indicate the presence of a faunal break; and if present (2) where any such breaks occur. Differences in assemblage composition between locations were tested with analyses of similarity and examination of residuals from regressions of pairwise dissimilarities against coastline distance. Data collected using UVC revealed two large faunal breaks co-located with a habitat discontinuity, the convergence of two currents and a thermal gradient. Data collected by BRUV revealed only a gradation of change across the study region. Greater understanding of the biogeographic structure of these communities will facilitate more effective management, especially in light of anticipated range shifts in response to global climate change.
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10

Olwa, Richard, Herbert Nakiyende, Elias Muhumuza, Samuel Bassa, Anthony Taabu-Munyaho, and Winnie Nkalubo. "Ecology of the Critically Endangered Singidia Tilapia (Teleostei: Cichlidae: Oreochromis esculentus) of lake Kayanja, Uganda and its conservation implications." Journal of Threatened Taxa 12, no. 10 (July 26, 2020): 16251–56. http://dx.doi.org/10.11609/jott.5700.12.10.16251-16256.

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Singidia Tilapia Oreochromis esculentus is a Critically Endangered native tilapia fish species endemic to lakes Victoria and Kyoga basins of East Africa, however, it disappeared from these main lakes due to overfishing, environmental degradation and predation by the introduced Nile Perch Lates niloticus. Remnant populations of this fish species is now restricted to satellite lakes including Lake Kayanja of the Victoria basin. This study provides updated information about the population abundance, critical habitat, threats and diet of Singidia Tilapia to inform conservation decisions to revive its populations in the wild. Fish data collection and mapping of nursery and breeding habitats of Singidia Tilapia on Lake Kayanja was conducted between February 2016 and October 2017. In all the areas mapped and sampled, Singidia Tilapia (with a size range of 11–27 cm TL) was the most abundant (43%) relative to exotic Nile Tilapia Oreochromis niloticus (21%) and Redbelly Tilapia Coptodon zillii (36%). The emergence of introduced (exotic) tilapias like Nile Tilapia recorded in this study could be attributed to cage fish farming being carried out in this Lake. The diet of Oreochromis esculentus consisted mainly of detritus (60.8 %), plant materials (27.7%) and blue-green algae (5.5%). Destruction of critical habitats and presence of introduced fish species were noted as the major threats to this fish and its habitats. The generated information could contribute to guiding stakeholders to undertake appropriate actions to conserve this threatened fish species and its habitats.
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Дисертації з теми "Fish habitat improvement Victoria"

1

Catalano, Matthew J. "Evaluating fish-habitat relations, fish distribution, and effects of dam removal in the Baraboo River, Wisconsin /." Link to Abstract, 2002. http://epapers.uwsp.edu/abstracts/2002/Catalano.pdf.

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Lee, Hing-kong Edwin. "Methods to assess fisheries enhancement by the deployment of artificial reefs (a case study at Hoi Ha Wan, Hong Kong) /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22264048.

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Upton, Harold F. "The economic consequences of fish habitat conservation and management /." View online ; access limited to URI, 2004. http://0-wwwlib.umi.com.helin.uri.edu/dissertations/dlnow/3135922.

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Robson, Colleen. "Three-dimensional flow dynamics and bed morphology around deflectors in a laboratory flume." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19571.

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Although deflectors are commonly used in fish habitat rehabilitation projects to create and/or maintain pools, there is a lack of understanding of the complex flow field and scour patterns around these structures. The objective of this research is to quantify the 3D flow dynamics and the bed morphology around various designs of flow deflectors in a laboratory flume over a plain and mobile bed. 3D velocity measurements were taken with an acoustic Doppler velocimeter. After comparing different methods of bed shear stress estimates, it was determined that the turbulent kinetic energy approach was best at capturing the shear stress amplification near the deflectors. Deflectors oriented perpendicular to the flow create the most important disturbance of the flow field, the greatest increase in turbulence intensity and the largest scour hole, followed by upstreamoriented deflectors (135°) and downstream-oriented ones (45°). 90° deflectors would therefore potentially provide the greatest benefit for fish habitat rehabilitation.
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Dooley, James Henry. "Collaborative design of fish habitat enhancement projects in streams and rivers of Washington State /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/5581.

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Klungle, Matthew M. "An evaluation of large woody debris restorations on the Manistee and Au Sable rivers, Michigan." Diss., Connect to online resource - MSU authorized users, 2006.

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7

Taylor, Cynthia H. "Evaluation of stream habitat enhancement projects in the Umatilla National Forest, northeast Oregon and southeast Washington /." view abstract or download file of text, 2000. http://wwwlib.umi.com/cr/uoregon/fullcit?p1400408.

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Thesis (M.A.)--University of Oregon, 2000.
Typescript. Includes vita and abstract. Includes bibliographical references (leaves 354-373). Also available for download via the World Wide Web; free to University of Oregon users.
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8

Frei, Christopher Michael. "Design of fish passage at bridges and culverts : Hydraulic engineering circular - 26." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Thesis/Fall2006/c_frei_082506.pdf.

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Vadas, Robert L. "Habitat tools for assessing instream-flow needs for fishes in the upper Roanoke River, Virginia." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07102007-142521/.

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10

MacDonald, Kit. "CASE STUDIES IN STREAM AND WATERSHED RESTORATION (URBAN, AGRICULTURAL, FOREST AND FISH HABITAT IMPROVEMENT)." Arizona-Nevada Academy of Science, 2015. http://hdl.handle.net/10150/621701.

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Stream and watershed restoration projects have become increasingly common throughout the U.S., and the need for systematic post-project monitoring and assessment is apparent. This study describes three stream and watershed ecological restoration projects and the monitoring and evaluation methods employed or planned to evaluate project successes or failures. The stream and watershed restoration and evaluation methods described in this paper may be applicable to projects of similar types and scales. Rivers and streams serve a variety of purposes, including water supply, wildlife habitat, energy generation, transportation and recreational opportunities. Streams are dynamic, complex systems that not only include the active channel, but also adjacent floodplains and riparian vegetation along their margins. A natural stream system remains stable while transporting varying amounts of streamflow and sediment produced in its watershed, maintaining a state of “dynamic equilibrium.” (Strahler 1957, Hack 1960). When in-stream flow, floodplain morphology, sediment characteristics, or riparian vegetation are altered, this can affect the dynamic equilibrium that exists among these stream features, causing unstable stream and floodplain conditions. This can cause the stream to adjust to a new equilibrium state. This shift may occur over a long time and result in significant changes to water quality and stream habitat. Land-use changes in a watershed, stream channelization, installation of culverts, removal or alteration of streambank vegetation, water impoundments and other activities can dramatically alter ecological balance. As a result, large adjustments in channel morphology, such as excessive bank erosion and/or channel incision, can occur. A new equilibrium may eventually be reached, but not before the associated aquatic and terrestrial environment are severely impaired. Stream restoration is the re-establishment of the general structure, function and self-sustaining characteristics of stream systems that existed prior to disturbance (Doll et al. 2003). It is a holistic approach that requires an understanding of all physical and biological processes in the stream system and its watershed. Restoration can include a broad range of activities, such as the removal or discontinuation of watershed disturbances that are contributing to stream instability; installation of control structures; planting of riparian vegetation to improve streambank stability and provide habitat; and the redesign of unstable or degraded streams into properly functioning channels and associated floodplains. Kauffman et al. (1997) define ecological restoration as the reestablishment of physical, chemical and biological processes and associated linkages which have been damaged by human actions.
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Книги з теми "Fish habitat improvement Victoria"

1

Seehorn, Monte E. Fish habitat improvement handbook. Atlanta, Ga: U.S. Dept. of Agriculture, Forest Service, Southern Region, 1985.

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2

Seehorn, Monte E. Fish habitat improvement handbook. Atlanta, Ga: U.S. Dept. of Agriculture, Forest Service, Southern Region, 1985.

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3

Seehorn, Monte E. Fish habitat improvement handbook. Atlanta, Ga: U.S. Dept. of Agriculture, Forest Service, Southern Region, 1985.

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4

R, Benaka Lee, and American Fisheries Society, eds. Fish habitat: Essential fish habitat and rehabilitation. Bethesda, Md: American Fisheries Society, 1999.

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5

United States. Bureau of Land Management. Resident Fish Team. Resident fish habitat management. Washington, D.C.?]: U.S. Dept. of the Interior, Bureau of Land Management, 1993.

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6

Seehorn, Monte E. Stream habitat improvement handbook. Atlanta, Ga. (1720 Peachtree Rd., N.W., Atlanta 30367-9102): U.S. Dept. of Agriculture, Forest Service, Southern Region, 1992.

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7

Studer, Theresa. Fish habitat improvement projects: Darrington Ranger District. [Washington, D.C.?]: USDA Forest Service, Mt. Baker-Snoqualmie National Forest, 1991.

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8

Studer, Theresa. Fish habitat improvement projects: Darrington Ranger District. [Washington, D.C.?]: USDA Forest Service, Mt. Baker-Snoqualmie National Forest, 1991.

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9

Dorratcague, Dennis E. Lemhi River Habitat Improvement Study: Final report. Portland, Or: U.S. Dept. of Energy, Bonneville Power Administration, Division of Fish and Wildlife, 1986.

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10

Lubinski, Kenneth S. Ecological information and habitat rehabilitation on the upper Mississippi River. [Onalaska, Wis: Reprinted by National Biological Survey, Environmental Management Technical Center, 1994.

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Частини книг з теми "Fish habitat improvement Victoria"

1

Loy, Georg, and Walter Reckendorfer. "Creation and Use of “Compensation” Habitats—An Integrated Approach." In Novel Developments for Sustainable Hydropower, 157–65. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99138-8_14.

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AbstractThe implementation of the EU Water Framework Directive (WFD) is a major challenge on large rivers. The current focus in applied fisheries science and in the implementation of the WFD is on fish passage and especially on hydraulic design parameters of fishways. This shifts attention from other important issues that must be addressed to reach the goals of the WFD. We believe that the requirements formulated in the WFD cannot be achieved by measures to improve fish passage alone. To achieve the objectives the improvement of habitat conditions, especially key habitat types such as permanently connected side arms, which provide spawning grounds and nurseries for rheophilic fish is required. We present an integrated approach which goes beyond upstream connectivity and prioritizes the creation and connection of habitats before the implementation of pure fish passage. The approach is based on a concept to compensate for the lack in gravel transportation and its function for the lithophilous fish community. The main ecological functions of gravel for fish such as providing spawning grounds and nurseries can be provided in connected and restructured tributaries, at shores with removed bank protection and in newly created bypass rivers.
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"Fish Habitat: Essential Fish Habitat and Rehabilitation." In Fish Habitat: Essential Fish Habitat and Rehabilitation, edited by R. Glenn Thomas. American Fisheries Society, 1999. http://dx.doi.org/10.47886/9781888569124.ch18.

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<em>Abstract.</em> —The magnitude of changes occurring in Louisiana’s estuaries creates a unique set of challenges in fish habitat management. Louisiana leads the nation in rate of coastal land loss, with some 70% of national losses. Both natural and anthropogenic factors are involved in coastal land loss in Louisiana: subsidence, erosion, sediment and freshwater deficits, channelization, and rising mean sea level. Disruption of the natural deltaic cycles of the Mississippi River has been particularly detrimental to estuarine fish habitat. Navigation and flood control needs have resulted in the near-total leveeing of the river, preventing normal overbank flooding, channel filling and switching, delta and subdelta development, and sediment nourishment of adjacent and down-current marshes. The resulting system is one in which the quantity and quality of estuarine habitat are linked to rapidly degrading wetland environments. Although the relative production value of subsiding marsh surfaces is often very high, this condition is not sustainable. Steep declines in fish production have been forecast for the next century. Federal, state, and local coastal restoration projects are attempting to address the loss of estuarine habitat with a number of techniques that may produce localized changes in fisheries production and distributions. Temporary resource displacements can result in increased harvest costs, and basin-scale changes may be particularly hard to accept for resource users who are satisfied with current conditions. Harvesters have demonstrated reluctance, and may lack the financial flexibility, to forfeit expected current catches for predicted enhancement of long-term fisheries production. In some instances, both sportfishers and commercial resource users have expressed concern over estuarine freshening and turbidity from restoration inputs from riverine sources. Additional public perception difficulties with restoration efforts arise from misunderstandings of the nature of estuarine functions, particularly of the importance of nursery habitat and of the value of low-salinity marshes as nursery habitat. Significant improvement in the outlook for estuarine fish habitat in Louisiana will require long-term and large-area vision from resource managers and the public.
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3

"Fish Habitat: Essential Fish Habitat and Rehabilitation." In Fish Habitat: Essential Fish Habitat and Rehabilitation, edited by R. Glenn Thomas. American Fisheries Society, 1999. http://dx.doi.org/10.47886/9781888569124.ch18.

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<em>Abstract.</em> —The magnitude of changes occurring in Louisiana’s estuaries creates a unique set of challenges in fish habitat management. Louisiana leads the nation in rate of coastal land loss, with some 70% of national losses. Both natural and anthropogenic factors are involved in coastal land loss in Louisiana: subsidence, erosion, sediment and freshwater deficits, channelization, and rising mean sea level. Disruption of the natural deltaic cycles of the Mississippi River has been particularly detrimental to estuarine fish habitat. Navigation and flood control needs have resulted in the near-total leveeing of the river, preventing normal overbank flooding, channel filling and switching, delta and subdelta development, and sediment nourishment of adjacent and down-current marshes. The resulting system is one in which the quantity and quality of estuarine habitat are linked to rapidly degrading wetland environments. Although the relative production value of subsiding marsh surfaces is often very high, this condition is not sustainable. Steep declines in fish production have been forecast for the next century. Federal, state, and local coastal restoration projects are attempting to address the loss of estuarine habitat with a number of techniques that may produce localized changes in fisheries production and distributions. Temporary resource displacements can result in increased harvest costs, and basin-scale changes may be particularly hard to accept for resource users who are satisfied with current conditions. Harvesters have demonstrated reluctance, and may lack the financial flexibility, to forfeit expected current catches for predicted enhancement of long-term fisheries production. In some instances, both sportfishers and commercial resource users have expressed concern over estuarine freshening and turbidity from restoration inputs from riverine sources. Additional public perception difficulties with restoration efforts arise from misunderstandings of the nature of estuarine functions, particularly of the importance of nursery habitat and of the value of low-salinity marshes as nursery habitat. Significant improvement in the outlook for estuarine fish habitat in Louisiana will require long-term and large-area vision from resource managers and the public.
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"Multispecies and Watershed Approaches to Freshwater Fish Conservation." In Multispecies and Watershed Approaches to Freshwater Fish Conservation, edited by Stephen T. Hurley. American Fisheries Society, 2019. http://dx.doi.org/10.47886/9781934874578.ch21.

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<em>Abstract</em>.—Waquoit Bay is a coastal estuary located on the south side of Cape Cod. The primary rivers feeding the bay, the Quashnet and Childs rivers, are small, coldwater, groundwater-fed streams. Most of the watersheds of both rivers were originally set aside in the 1600s as a plantation for the Native American Mashpee Wampanoag tribe. The rivers were heavily modified in the late 1700s by the building of mill dams and later in the 1800s by cranberry agriculture. The anadromous Brook Trout <em>Salvelinus fontinalis </em>fisheries in both rivers were acclaimed in the early 1800s. Anadromous river herring <em>Alosa </em>spp. runs were created on both streams by connecting the streams to Johns Pond, a natural kettle hole pond. After anadromous Brook Trout populations declined due primarily to habitat loss, efforts were initiated in the 1950s to restore anadromy to Brook Trout in Cape Cod rivers by overstocking with hatchery Brook Trout. After this project, land protection along the river started with the purchase of abandoned cranberry bogs. Both rivers were heavily stocked with Brown Trout <em>Salmo trutta </em>in the 1970s and 1980s to create a sea-run Brown Trout fishery. In 1976, Trout Unlimited began an ongoing habitat improvement project in the Quashnet River. In the 1970s and 1980s, the rapid development of Cape Cod threatened the watershed. In 1988, the Waquoit Bay National Estuarine Research Reserve was formed and the Commonwealth of Massachusetts purchased land in the watershed to preserve it as open space. As part of the purchase agreement, a potential well site was reserved, which led to studies by the U.S. Geological Survey on the hydrology of the Quashnet River and the impact of potential wells. In the early 1990s, fisheries management shifted away from the stocking of Brown Trout to focus on the native Brook Trout fishery. The Mashpee National Wildlife Refuge, a consortium of landowners centered on Waquoit Bay, was formed in 1995. In 1997, the contaminant ethylene dibromide from the former Otis Air Force Base Superfund site was found to be entering the upper Quashnet River. This led to the creation of a system of berms and groundwater extraction systems. The failure of part of the berm system led to concerns about fisheries impacts, and a restoration plan was developed. A Brook Trout passive integrated transponder tagging project was initiated on the Quashnet River in 2007, and the Brook Trout population has been annually sampled since 2000. In 2008–2010, adult wild Brook Trout from the Quashnet River were transplanted to the Childs River and a wild Brook Trout population was reestablished. Nitrogen loading from the watershed has become a major issue for the Waquoit Bay estuary, causing algae blooms and water-quality impacts. The fisheries of the Waquoit Bay tributaries have been protected and enhanced by an ongoing combination of land protection, fisheries management and research activities, and habitat improvements involving a wide variety of partners. Watershed development and potential climate change continue to threaten both the estuarine resources of Waquoit Bay and the native freshwater and diadromous fisheries of its tributaries.
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"Nutrients in Salmonid Ecosystems: Sustaining Production and Biodiversity." In Nutrients in Salmonid Ecosystems: Sustaining Production and Biodiversity, edited by Bruce R. Ward, Donald J. F. McCubbing, and Patrick A. Slaney. American Fisheries Society, 2003. http://dx.doi.org/10.47886/9781888569445.ch10.

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<em>Abstract.</em>—Positive numerical responses in steelhead <em>Oncorhynchus mykiss </em>and coho salmon <em>O. kisutch </em>juvenile abundance and size, smolt yield, and smolts per spawner were obtained from watershed restoration in the Keogh River on northern Vancouver Island, British Columbia. Annual increases coincided with treatment and were compared with data from an untreated neighboring watershed (Waukwaas River). The steelhead population, now apparently capable of thriving, was below replacement recruitment prior to the addition of inorganic nutrients and instream habitat structures, the key components of several restoration activities. Annual increases in summer densities of steelhead juveniles were recorded as the rehabilitation treatments progressed from 1997 to 2000. Estimation of steelhead parr densities indicated a 3.8-fold increase over pretreatment or internal untreated values; increases in sites with both inorganic nutrient briquettes and habitat structure additions were 2.5–1.9 times higher than sites with nutrient additions or habitat structures alone. Average size-at-age of juvenile salmonids, by autumn, significantly increased through the years of rehabilitation treatment and compared with fish in the Waukwaas River. Steelhead smolt yield in 2000 increased to 2,338 fish, the highest yield since 1993, but lower than the historical average (>6,000) due to low escapement. Current yield was an improvement over the historic low (<1,000 steelhead smolts, 1998). Coho smolt yield increased to 74,500 or 20% above the historic average (62,000 smolts; 1975–1999), well above the record low counts of 1998 (22,000), but below the historic maximum yield (105,000; 1981). A significant increase in steelhead smolt recruitment at low escapement, from less than 2 to greater than 50 smolts per spawner, was observed over the last four brood years (1995–1998). The assessment now shifts to further benefits to smolt yield, which will require evaluation to 2004.
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"Biology, Management, and Protection of North American Sturgeon." In Biology, Management, and Protection of North American Sturgeon, edited by Theodore I. J. Smith, Mark R. Collins, William C. Post, and John W. McCord. American Fisheries Society, 2002. http://dx.doi.org/10.47886/9781888569360.ch3.

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<em>Abstract.</em>—During 1984–1992, 97,483 shortnose sturgeon <em>Acipenser brevirostrum</em> were stocked in the Savannah River as part of a state/federal program to develop techniques and evaluate issues related to stock enhancement of sturgeons. Based on recovery of marked fish after a mean time out of 7.2 ± 1.9 years (range 5.9–10.4) and results from double-tagging studies, it is estimated that stocked juveniles provide at least 38.7% of the current adult population. Population estimates and catch/effort data suggest that the adult population is larger than 10 years ago, but juveniles are still scarce, suggesting a recruitment bottleneck during the early life stages. Based on field sampling, water quality degradation in the nursery habitat is believed to be at least partially responsible. The program identified issues associated with long term marking of stocked fish and showed that marking of small juvenile sturgeon for later recapture as adults was especially problematic. Improvement in tagging technologies including use of genetic markers should help resolve this issue. Stocking protocols approximated current recommendations developed by the Atlantic States Marine Fisheries Commission for Atlantic sturgeon <em>A. oxyrinchus</em>. However, stocking similar numbers of progeny per mating was not well controlled. This coupled with assumed differential survival of different groups of stocked animals appears to have resulted in lower genetic diversity of the adult population relative to other river systems. Future stocking efforts need to strive for balanced numbers of progeny per broodstock matings over time and similar survival rates. Straying of some stocked fish into nontarget rivers was noted and new enhancement or restoration programs should address the issue of imprinting of sturgeon.
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"From Catastrophe to Recovery: Stories of Fishery Management Success." In From Catastrophe to Recovery: Stories of Fishery Management Success, edited by David G. Fielder and James P. Baker. American Fisheries Society, 2019. http://dx.doi.org/10.47886/9781934874554.ch17.

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<i>Abstract</i>.—Saginaw Bay is a large coolwater region of Lake Huron and Walleye <i>Sander vitreus</i> is the apex predator. From the time of first settlement to the mid-1940s, the bay’s Walleye population was the target of a loosely regulated commercial fishery characterized by periods of overharvest and recovery but was sustained for more than half a century at an average annual yield of about 495 metric tons. The fishery collapsed due to a series of year-class failures attributed to declining water quality, habitat degradation, and effects of invasive species. The degraded and collapsed condition lasted until the early 1980s. With improving water quality stemming from clean water legislation and the closure of the commercial fishery, a new period of improvement was achieved. Walleye fingerling stocking was implemented and a recreational fishery soon emerged. Research and assessment sought to monitor stock mortality, growth, and exploitation rates as well as contribution of stocked fish to the fishery. Recovery plans were drafted that sought to improve spawning habitat and improve survival of Walleye fry by creating a predation barrier to the predatory effects of the invasive Alewife <i>Alosa pseudoharengus</i> through increased Walleye stocking. A series of cascading food-web changes took place in Lake Huron, resulting in the sudden collapse of Alewives, and Walleye natural reproduction surged beginning in 2003. Walleye stocking was discontinued in 2006 and recovery targets were first achieved in 2009. Management and research shifted from recovery efforts to enhanced stock assessment efforts and modeling, a clear sign of success! Key lessons learned include (1) eliminating or at least reducing obstacles to reproduction (such as habitat and water quality) are essential first steps to laying the foundation for recovery, (2) maintaining populations (via of stocking in this instance) will help ensure that broodfish are available for spawning when conditions improve, (3) ecosystems are resilient and when released from stressors (Alewives in this instance) natural processes can resume, (4) great value exists in survey/assessment investment and long-term data sets for guiding restoration, and (5) resolve and commitment by natural resource professionals, administrators, and stakeholders is critical for sustaining restoration efforts and the investment they require.
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"Black Bass Diversity: Multidisciplinary Science for Conservation." In Black Bass Diversity: Multidisciplinary Science for Conservation, edited by Zachary A. Thomas, Thomas L. Arsuffi, and Stephan J. Magnelia. American Fisheries Society, 2015. http://dx.doi.org/10.47886/9781934874400.ch13.

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<em>Abstract</em>.—The Guadalupe Bass <em>Micropterus treculii</em> is a central Texas endemic black bass species occurring only in streams and rivers draining the Edwards Plateau ecoregion. It is designated the state fish of Texas and provides a popular sport fishery. In addition to being a popular sport fish, it is listed as a species of special concern due to habitat degradation and hybridization with Smallmouth Bass <em>M. dolomieu</em>. Past socioeconomic surveys of Texas black bass anglers have focused primarily on reservoir fisheries while little is known about fishing patterns, economic impact, and preferences of river and stream anglers. A Web-based open-access survey was used to determine fishing characteristics, assess attitudes and quantify the economic impact of anglers fishing rivers and streams in a 24-county region of Texas from August 20, 2011 to December 20, 2012, with a focus on anglers who specifically fished for Guadalupe Bass. A total of 700 respondents participated in the survey. More than half of respondents were paddlers targeting black bass, and 42% specifically fished for Guadalupe Bass on their trips. An additional 34% of anglers listed black bass species, which included Guadalupe Bass as their preferred species. Similar to previous surveys of Texas river and stream anglers, access was identified as the largest impediment to the future maintenance and improvement of river and stream fishing. Based on 563 surveys used in the economic impact analysis, using IMPLAN (Impact Analysis for Planning) Professional version 2 (Minnesota IMPLAN Group, Minneapolis), an estimated US$74,182,080 in direct angler expenditures was spent on fishing trips to the study region, resulting in a total economic impact (including indirect and induced impacts) of $71,552,492 and 776 full-time jobs. These findings indicate the economic value of river and stream angling to the Texas economy.
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"Urban and Community Fisheries Programs: Development, Management, and Evaluation." In Urban and Community Fisheries Programs: Development, Management, and Evaluation, edited by Kevin Meneau. American Fisheries Society, 2008. http://dx.doi.org/10.47886/9781934874042.ch18.

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<em>Abstract.-</em>The St. Louis Urban Fishing Program (UFP) was established in 1969 to provide close-to-home fishing opportunities for urban anglers in St. Louis, Missouri through regular fish stockings at five lakes, totaling 8.4 hectares. Urban Fishing Clinics (UFC) were added for children and therapeutic patients in 1971 and 1979, respectively. Since 1973, UFP has been funded and administered by the Missouri Department of Conservation (MDC) with cooperation from municipal partners. Stocking rate, stocking schedule, and fishing regulation changes were made in the early 1990s. Since 1993, Community Assistance Program agreements have enabled MDC to improve UFP lake habitats and amenities. Subsequently, similar urban fishing programs have developed in Kansas City, St. Joseph, Sedalia, and Springfield, Missouri. Sportfish lakes are stocked with common carp <em>Cyprinus carpio</em>, channel catfish <em>Ictalurus punctatus</em>, hybrid sunfish <em>Lepomis macrochirus </em>x <em>L. cyanellus</em>, brown trout <em>Salmo trutta</em>, and rainbow trout <em>Oncorhynchus mykiss </em>from MDC hatcheries and commercial sources to create year-round angling opportunities. Annual fish stockings average up to 263 kg/ha, with a total of 1,119,105 kg since 1969. Completion of habitat improvement projects and subsequent successful natural reproduction of sportfish have allowed nine UFP lakes to provide additional opportunities for bluegill <em>Lepomis macrochirus</em>, largemouth bass <em>Micropterus salmoides</em>, redear sunfish <em>Lepomis microlophus</em>, and white crappie <em>Pomoxis annularis</em>. The UFC lakes are stocked with hybrid sunfish and channel catfish, averaging 152 kg/ha, with a total of 26,771 kg since 1978, and offer fishing program opportunities from April through October. In 2007, UFP lakes consist of 20 sportfish and six UFC lakes, totaling 30.1 hectares. All sportfish and most UFC lakes are partner-owned and located in municipal parks. Annual fishing pressure ranges from 439 to 12,019 h/ha and averages 109,470 trips/ year. Over 48,000 children and therapeutic patients have attended UFC since their inception; however, UFC impacts to angler recruitment and knowledge of aquatic conservation are unknown. So, a new program, GO FISH! was launched in 2007.
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"From Catastrophe to Recovery: Stories of Fishery Management Success." In From Catastrophe to Recovery: Stories of Fishery Management Success, edited by Clifford Kraft. American Fisheries Society, 2019. http://dx.doi.org/10.47886/9781934874554.ch12.

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<i>Abstract</i>.—Recovery of Brook Trout <i>Salvelinus fontinalis</i> in an Adirondack (New York, USA) lake that was subject to anthropogenic acidification provides a remarkable example of fishery improvement in response to environmental regulation. Studies initiated in the 1950s following a steady decline in Brook Trout populations helped document this recovery. Unsuccessful efforts to maintain a fishery in Honnedaga Lake with hatchery-reared fish in the 1950s forced managers to look beyond stocking, the primary approach employed until that time. As a result, fishery scientists collaborated in the 1960s and 1970s with researchers from other disciplines, providing a broad understanding of atmospheric inputs, watershed processes, and chemical interactions influencing lakes and streams. Extensive studies in the 1980s confirmed the connection between Brook Trout mortality and airborne emissions of strong acid nitrogen and sulfur compounds that released toxic inorganic aluminum from increasingly acidic soils. Political debates in that decade focused on federal regulatory efforts to reduce these emissions, which culminated in passage of the Clean Air Act Amendments of 1990. Within the next decade, Brook Trout that took refuge within a few well-buffered, groundwater-fed tributaries began to recolonize Honnedaga Lake as conditions improved in the main lake due to reduced atmospheric deposition of sulfur dioxide and nitrogen oxides. Since then, management of Honnedaga Lake in the 21st century relied upon natural reproduction by wild Brook Trout. Ultimately, social and political decisions made far away from the Adirondack Mountain region developed regulations that fostered recovery of the Honnedaga Lake fishery by restoring necessary water-chemistry conditions. The recovery of Honnedaga Lake highlights three lessons. First, environment and habitat conditions must be suitable before fishery management actions can be effective. This criterion requires a broad understanding of environmental conditions that sustain fisheries, incorporating insights from atmospheric sciences, geology, and limnology. Second, natural reproduction of Brook Trout in Honnedaga Lake successfully increased population abundance without the additional intervention of stocking hatchery-reared fish. Finally, successful management of Honnedaga Lake required political support and regulatory action from beyond the Adirondack region, as well as media attention.
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Звіти організацій з теми "Fish habitat improvement Victoria"

1

Bailey, Timothy D., and Gregory P. Rimbach. Umatilla River Subbasin Fish Habitat Improvement; 1992 Annual Report. Office of Scientific and Technical Information (OSTI), March 1993. http://dx.doi.org/10.2172/897556.

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Bailey, Timothy D., and Gregory P. Rimbach. Umatilla River Subbasin Fish Habitat Improvement; 1991 Annual Report. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/10165412.

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Bailey, Timothy D., and Troy S. Laws. Umatilla River Subbasin Fish Habitat Improvement; 1993 Annual Report. Office of Scientific and Technical Information (OSTI), May 1994. http://dx.doi.org/10.2172/10194750.

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Laws, Troy S. Umatilla River Subbasin Fish Habitat Improvement; 1995 Annual Report. Office of Scientific and Technical Information (OSTI), June 1996. http://dx.doi.org/10.2172/437699.

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Laws, Troy S. Umatilla River Subbasin Fish Habitat Improvement; 1994 Annual Report. Office of Scientific and Technical Information (OSTI), June 1995. http://dx.doi.org/10.2172/245634.

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St. Hilaire, Danny R. Umatilla River Subbasin Fish Habitat Improvement Program, 2005 Annual Report. Office of Scientific and Technical Information (OSTI), May 2006. http://dx.doi.org/10.2172/900806.

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Bailey, Timothy D. Umatilla River Subbasin Fish Habitat Improvement Project, 1989 Annual Report. Office of Scientific and Technical Information (OSTI), January 1989. http://dx.doi.org/10.2172/925497.

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Bailey, Timothy D., and Gregory P. Rimbach. Umatilla River Subbasin Fish Habitat Improvement Project, 1990 Annual Report. Office of Scientific and Technical Information (OSTI), March 1991. http://dx.doi.org/10.2172/925500.

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Beschta, Robert L., Jack Griffith, and Thomas A. Wesche. Field Review of Fish Habitat Improvement Projects in Central Idaho. Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/6158819.

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St. Hilaire, Danny R., Michael Montgomery, and Timothy D. Bailey. Umatilla River Subbasin Fish Habitat Improvement Program, 1996-2003 Summary Report. Office of Scientific and Technical Information (OSTI), January 2005. http://dx.doi.org/10.2172/900803.

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