Dissertations / Theses on the topic 'Broken River'
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Price, Amina, and n/a. "Utilisation of Still-Water Patches by Fish and Shrimp in a Lowland River, With Particular Emphasis on Early-Life Stages." University of Canberra. Applied Science, 2007. http://erl.canberra.edu.au./public/adt-AUC20081202.090600.
Full textKapoutsos, David. "Provenance changes and glauconite formation in the Broken River to Iron Creek/Waipara Greensand Formations marks the late Cretaceous-Eocene transgression." Thesis, University of Canterbury. Department of Geology, 2005. http://hdl.handle.net/10092/3181.
Full textCramb, Jonathan Andrew. "Taxonomy and palaeoecology of Quaternary faunas from caves in eastern tropical Queensland : a record of broad-scale environmental change." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/59971/1/Jonathan_Cramb_Thesis.pdf.
Full textO'Neal, Sarah Louise. "Lessons to learn from all out invasion life history of brown trout (Salmo trutta) in a Patagonian river /." Diss., [Missoula, Mont.] : The University of Montana, 2008. http://etd.lib.umt.edu/theses/available/etd-05142008-142539/.
Full textKristensen, Esben Astrup, and n/a. "Population dynamics, spawning and movement of brown trout in Taieri River tributary streams." University of Otago. Department of Zoology, 2007. http://adt.otago.ac.nz./public/adt-NZDU20070314.091924.
Full textHiggins, David Ian. "Catchment scale influences on brown trout fry populations in the Upper Ure catchment, North Yorkshire." Thesis, Durham University, 2011. http://etheses.dur.ac.uk/3571/.
Full textLouhi, P. (Pauliina). "Responses of brown trout and benthic invertebrates to catchment-scale disturbance and in-stream restoration measures in boreal river systems." Doctoral thesis, University of Oulu, 2010. http://urn.fi/urn:isbn:9789514263217.
Full textJudice, Taylor J. "Detecting Color-Producing Pigments in the Indian River Lagoon by Remote Sensing." Kent State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=kent1566402904063089.
Full textHansbarger, Jeff Lee. "Trout movement and habitat use in the upper Shavers Fork of the Cheat River, West Virginia." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4070.
Full textTitle from document title page. Document formatted into pages; contains xi, 155 : ill., maps (some col.). Includes abstract. Includes bibliographical references (p. 80-91).
Olson, Michael. "Downstream migration of brown trout (Salmo trutta) smolts past hydropowerplants in the river Emån." Thesis, Karlstad University, Division for Environmental Sciences, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-21.
Full textThe passage efficiency of downstream migrating brown trout (Salmo trutta) smolts past two hydropower plants in the River Emån, southeastern Sweden, was evaluated by telemetry. From 26 April to 17 May 2005, 40 wild brown trout smolts were radio-tagged, and their positions were recorded daily until 14 June. Approximately 45% of the individuals passed both power plants, and 15% made it to the sea, some 28 km downstream of the power plants. About 20% of the individuals ceased migrating, residing in a lotic habitat. Mortality due to predation was 33%, and the predation rate was higher in the power plant dams than it was downstream of the power plants. Turbine-induced mortality was greater in the upper power plant (40%) than in the lower one (13%). Fish that chose the alternative routes, through the gates, swam past the upper dam faster than fish that swam through the turbines. The results confirm previous work in the river, namely that measures need to be taken to improve passage efficiency past the power plants, particularly passage of the upper power plant. Such measures are of crucial importance if the nature-like bypass channels at the power plants in Finsjö are going to have any long-term effects on the brown trout population.
Passageeffektiviteten för nedströms vandrande havsöringssmolt (Salmo trutta) förbi två vattenkraftverk i Emån, i sydöstra Sverige, utvärderades med telemetri. Från 26 april till och med 17 maj 2005 märktes 40 vilda havsöringssmolt med radiosändare och de positionsbestämdes dagligen till och med 14 juni. Ungefär 45% av individerna passerade båda kraftverken, och 15% klarade sig till havet, cirka 28 km nedströms kraftverken. Omkring 20% av individerna avbröt vandringen och stannade i ett lotiskt habitat. Mortalitet på grund av predation uppgick till 33%, och predationshastigheten var högre i kraftverksdammarna än nedströms kraftverken. Den turbininducerade mortaliteten var högre i det övre kraftverket (40%) än i det nedre (13%). Det gick fortare att passera den övre kraftverksdammen för fisk som valde de alternativa rutterna, genom dammluckorna, jämfört med att passera genom turbinerna. Dessa resultat bekräftar tidigare studier i ån, nämligen att åtgärder krävs för att förbättra passageeffektiviteten förbi kraftverken, i synnerhet passagen av det övre kraftverket. Sådana åtgärder är av avgörande betydelse om de naturlika fiskvägarna vid kraftverken i Finsjö ska få några långsiktiga effekter på havsöringspopulationen.
Rivinoja, Peter. "Migration problems of Atlantic salmon (Salmo salar L.) in flow regulated rivers /." Umeå : Dept. of Aquaculture, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/2005114.pdf.
Full textWood, Jeremiah. "An Investigation Of The Early Life-History Of Brown Trout (Salmo Trutta) And Potential Influnces on Invasion Success in the Logan River, Utah." DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/131.
Full textParedes, Paredes Pedro Fernandes Pedro Fernandes. "Marvila. Transversabilidades ribeirinhas." Master's thesis, Universidade de Lisboa. Faculdade de Arquitetura, 2011. http://hdl.handle.net/10400.5/6744.
Full textGosselin, Marie-Pierre. "Aquatic habitat characterization and use in groundwater versus surface runoff influenced streams : brown trout (Salmo trutta) and bullhead (Cottus gobio)." Thesis, Coventry University, 2009. http://curve.coventry.ac.uk/open/items/8d69e5ee-5c54-1d43-2390-e9bea23aad35/1.
Full textKoljonen, S. (Saija). "Ecological impacts of in-stream restoration in salmonid rivers:the role of enhanced structural complexity." Doctoral thesis, Oulun yliopisto, 2011. http://urn.fi/urn:isbn:9789514295690.
Full textTiivistelmä Uiton jälkeisten kunnostustoimenpiteiden määrä Suomessa on ollut huomattava, mutta vaikutusten arviointi, pelkästään kalastonkin kannalta, on jäänyt vähäiselle huomiolle. Tässä työssä selvitettiin kunnostusten merkitystä lohen ja taimenen poikasvaiheille, huomioiden etenkin pohjan rakenteellisen monimuotoisuuden vaikutus. Työssä selvitettiin myös kunnostusten vaikutuksia lehtikarikkeen pidätyskykyyn, joka on erityisesti latvapurojen ekosysteemien tärkeimpiä perustoimintoja. Lohikalojen talviekologinen tutkimus on viime aikoihin saakka ollut vähäistä, vaikka talviolosuhteiden uskotaan rajoittavan pohjoisten virtavesien eliöstön elinmahdollisuuksia. Kokeellisessa työssä rännimäisissä uomissa talvehtiminen aiheutti taimenenpoikasille tilapäisen painon alenemisen ja nopean kompensaatiokasvun loppukeväällä. Kompensaatiokasvu voi vaikuttaa negatiivisesti koko kalan eliniän, joten kunnostusten tuoma hyöty sopivien suojapaikkojen lisääntymisenä voi edesauttaa lohikalojen pitkäaikaista menestymistä. Kiiminkijoella lohenpoikasten tiheydet eivät muuttuneet kunnostuksen myötä ja vuosien välinen vaihtelu oli kuuden vuoden seurantajaksolla huomattavan suurta. Elinympäristömallinnuksen perusteella soveltuvan elinympäristön lisäys ei ollut merkittävää, koska etenkin talviaikaisten alueiden puute jäi huomattavaksi. Suurin osa soveltuvasta elinympäristöstä sijaitsi joen reuna-alueilla, joten kunnostusvaikutus joen keskiosaan jäi odotettua pienemmäksi. Uittoperkaus on voinut johtaa latvavesien ekosysteemien köyhtymiseen maalta tulevan orgaanisen aineksen pidättymiskyvyn vähentyessä. Kokeellisen työn perusteella kuitenkin nykypäivän tilanne vuosikymmeniä uiton loppumisen jälkeen osoittautui lähes yhtä pidättäväksi kuin nykyisin käytetyt kunnostusrakenteet (kivi tai puu). Kunnostusrakenteeseen tulisi lisätä huomattava määrä puuta, jotta lehtikarike pidättyisi korkeallakin virtaamatasolla. Tulosten perusteella elinympäristöjen muuttaminen monimuotoisemmiksi ei takaa kunnostustoimien onnistumista, sillä etenkin kalapopulaatioita rajoittavat yleensä useat tekijät. Jos kuitenkin elinympäristö on populaatiota rajoittava resurssi ja sitä pystytään lisäämään (kuten talviaikaiset suojapaikat), voidaan kunnostuksella saada näkyviä tuloksia. On ilmeistä, että kunnostustoimien tulisi olla nykyistä kattavampia ja paremmin suunnattuja rajoittaviin tekijöihin, jotta tulokset näkyisivät
Tissier, Marion. "Etude numérique de la transformation des vagues en zone littorale, de la zone de levée aux zones de surf et de jet de rive." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14437/document.
Full textIn this thesis, we introduce a new numerical model able to describe wave transformation from the shoaling to the swash zones, including overtopping. This model is based on Serre Green-Naghdi equations, which are the basic fully nonlinear Boussinesq-type equations. These equations can accurately describe wave dynamics prior to breaking, but their application to the surf zone usually requires the use of complex parameterizations. We propose a new approach to describe wave breaking in S-GN models, based on the representation of breaking wave fronts as shocks. This method has been successfully applied to the Nonlinear Shallow Water (NSW) equations, and allows for an easy treatment of wave breaking and shoreline motions. However, the NSW equations can only be applied after breaking. In this thesis, we aim at extending the validity domain of the NSW model SURF-WB (Marche et al. 2007) to the shoaling zone by adding the S-GN dispersive terms to the governing equations. Local switches to NSW equations are then performed in the vicinity of the breaking fronts, allowing for the waves to break and dissipate their energy. Extensive validations using laboratory data are presented. The new model, called SURF-GN, is then applied to study tsunami-like undular bore dynamics in the nearshore. The model ability to describe bore dynamics for a large range of Froude number is first demonstrated, and the effects of the bore transformation on wave run-up over a sloping beach are considered. We finally present an in-situ study of broken wave celerity, based on the ECORS-Truc Vert 2008 field experiment. In particular, we quantify the effects of non-linearities and evaluate the predictive ability of several non-linear celerity models
Bergmann, Nicolas Timothy. "Preserving Nature through Film: Wilderness Alps of Stehekin and the North Cascades, 1956-1968." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/973.
Full textPreston, Andrew C. "Research and development of triploid brown trout Salmo trutta (Linnaeus, 1758) for use in aquaculture and fisheries management." Thesis, University of Stirling, 2014. http://hdl.handle.net/1893/21647.
Full textAverill, Annalaura. "Brown-headed cowbird parasitism of neotropical migratory songbirds in riparian areas along the lower Colorado river." 1996. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1996_452_sip1_w.pdf&type=application/pdf.
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