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Dissertations / Theses on the topic 'Fish conservation'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

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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2

Landom, Kevin Lee. "Introduced Sport Fish and Fish Conservation in a Novel Food Web: Evidence of Predatory Impact." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/556.

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This study addressed a fundamental question in applied ecology and conservation; what is the predatory impact of introduced piscivorous sport fish on imperiled native fish populations? More specifically, which of many introduced species and size-classes represent the greatest threats and should be targeted for control? In order to explore this important question, an integrated analysis of stable isotopes, quantified observed diet analysis, and stable isotope mass-balance models were used to quantify trophic interactions. These tools were used to construct food web models that were then comp

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3

Dickens, John. "Extracting fish abundance indices from recreational fishing competition data." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/19954.

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Over-exploited fisheries result in global economic losses and can lead to the degradation of marine ecosystems. Commercial and recreational fisheries have grown substantially over the past decades placing fish stocks under increasing pressure. Fisheries management aims to conserve and restore stocks to economically and environmentally sustainable levels. Stock assessments are mostly based on analyses of fishery-dependent data, however, this practice often neglects uneconomically important species, making ecosystem approaches to fisheries management challenging. Competitive recreational angling

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4

Mead, Angela. "The role of restocking in enhancing marine fisheries : a way forward /." Thesis, View the Table of Contents & Abstract, 2005. http://sunzi.lib.hku.hk/hkuto/record/B34737911.

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5

Haupt, Philip. "The use of fish species in a marine conservation plan for KwaZulu-Natal." Thesis, Nelson Mandela Metropolitan University, 2011. http://hdl.handle.net/10948/1528.

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This study formed part of a larger provincial marine systematic conservation plan for KwaZulu-Natal (KZN), South Africa, called SeaPLAN. Owing to budget and time constraints, not all ± 1640 fish species that occur in the region were considered. A method to prioritise species was therefore developed to identify those species which were most at most risk of being excluded by a conservation plan based primarily on habitat representation (i.e. SeaPLAN). The method was based on three underlying principles: (i) species with limited conservation options; (ii) threatened species; and (iii) inherently

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6

Hamidan, Nashat A. "Ecology and conservation of Garra ghorensis, an endangered freshwater fish in Jordan." Thesis, Bournemouth University, 2016. http://eprints.bournemouth.ac.uk/25214/.

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The focal species of the research was the freshwater cyprinid fish Garra ghorensis. Endemic to the southern Dead Sea basin of the Middle East, it is ‘Red listed’ by the IUCN as ‘endangered’. It inhabits the small rivers of the basin (‘wadis’), existing within fish communities of very low species diversity. The aim of the research was to inform conservation strategies for the species through investigations into their phylogeny, current distribution, life history traits and feeding relationships. Analysis of the mitochondrial DNA of G. ghorensis with other fishes of the Garra genus tested two co

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7

Jones, Matthew William. "Application of genetic markers to conservation biology, salmonid fish in Eastern Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ66660.pdf.

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8

Stumpf, Jonathan M. "The Last Best Fish: will conservation and consensus save Montana's Arctic grayling?" The University of Montana, 2009. http://etd.lib.umt.edu/theses/available/etd-12182008-103630/.

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9

Wolf, Morgan Kay. "An Internship in Conservation Biology with the U.S. Fish and Wildlife Service." Miami University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=miami1259858714.

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10

Stumpf, Jonathan M. "The last best fish will conservation and consensus save Montana's Arctic Grayling? /." [Missoula, Mont.] : The University of Montana, 2008. http://etd.lib.umt.edu/theses/available/etd-12182008-103630/unrestricted/STUMPF_JONATHAN_PROJECT.pdf.

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Thesis (M.A.) -- University of Montana, 2008.<br>Title from author supplied metadata. Description based on contents viewed on June 22, 2009. ETD number: etd-12182008-103630. Includes bibliographical references.

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11

Ratner, Susan Ellen. "Ecologically and evolutionarily motivated models of fish populations for conservation and management /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2001. http://wwwlib.umi.com/cr/ucsd/fullcit?p3022220.

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12

Hedden, Skyler C. "Movement and consumptive demand of the introduced flathead catfish Pylodictis olivaris in the upper Gila River basin, New Mexcio, and potential impacts on native fishes." Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/20492.

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Master of Science<br>Biology<br>Keith B. Gido<br>Negative interactions with nonnative fish are often cited as a leading cause of declining native fish populations, but quantifying these interactions is difficult. Movement ecology and consumptive demand estimates of nonnative fish predators is needed to better understand potential impacts these organisms are having on native species. The objective of this thesis were to estimate the consumptive demand of Flathead Catfish Pylodictis olivaris on native fishes across an elevational gradient, and characterize the movement at hourly, daily, and seas

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13

Grooms, Bennett Paul. "Exploring wildlife recreationists' conservation behaviors and perceptions of state fish and wildlife agencies to inform conservation engagement and support." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/104166.

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The success of state fish and wildlife agency conservation efforts depends highly on their engagement with wildlife recreationists, ranging from those with consumptive (i.e., hunters and anglers) to nonconsumptive (i.e., birders, wildlife viewers) interests. However, declines in their historic constituent base of consumptive recreationists, coupled with an increasingly diverse and interconnected group of nonconsumptive recreationists, has placed new pressures on state fish and wildlife agencies. Human dimensions research into recreationists' behaviors and perceptions can help these agencies de

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14

Mills, Courtenay Elyse. "Historical and Contemporary Fish Dispersal in Australia's Northern Rivers." Thesis, Griffith University, 2012. http://hdl.handle.net/10072/366825.

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Riverine environments present specific barriers and challenges to dispersing fish, depending on their dispersal capability. While some barriers are obvious and finite (for example a waterfall), the subtle influences of dendritic river network structure can also affect the dispersal, and therefore the genetic structure, of freshwater fish within river catchments. In addition to these natural barriers, artificial barriers like weirs and dams can have significant effects on the flow of genes between populations in rivers. In order to achieve the effective management and conservation of population

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15

Fernández, Sofía Solano. "Empirical evaluation of the effectiveness of South Africa's marine protected area network in representing fish communities." Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/11828.

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In this study, fish community structure as sampled by shore angling, trawling, boat-based line-fishing and seine netting was compared across the EEZ of South Africa, including sites in designated MPAs. Multivariate statistics were used to assess the extent to which MPAs represent the full range of fish communities in South African waters. Results show there is an increase in fish diversity from west to east along the South African coast.

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16

Curtis, Janelle Marie Renelle. "Life history, ecology and conservation of European seahorses." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85146.

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My thesis examined the implications of life history and ecology for population-level responses of the European long-snouted seahorse ( Hippocampus guttulatus Cuvier 1829) to habitat alteration, exploitation and a recommended minimum size limit for seahorse management. The research employed a mark-recapture study, underwater visual censuses (UVCs) and catch data from an unrelated experimental sampling program in the Ria Formosa Lagoon (southern Portugal). These small-bodied fish are characterized by rapid growth rate, early age at maturity, high natural mortality, short generation time,

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17

Gärde, Jenny. "TREATMENT OF WASTE WATER FROM A FISH CONSERVATION INDUSTRY : Flocculation Experiment and Analysis." Thesis, Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-17183.

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Tjörn is a cluster of islands, located in Västra Götaland’s county, on the west coast of Sweden. A fishing industry called Kädesholmen Seafood AB is located at Kädesholmen, one of the larger islands of Tjörn. The industry produces different types of fish preserves. The resulting waste water is polluted with mostly nutrients and organic matter in high concentrations. In lack of other treatment alternatives, the waste water is collected and transported to Trollhättan for biological degradation. Sweco, a consulting company, has been working together with Klädesholmen Seafood AB to establish a loc

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18

Fore, Jeffrey D. "Influence of fluvial geomorphology on fish assemblage structure within an agriculturally impacted watershed /." View online, 2008. http://repository.eiu.edu/theses/docs/32211131400070.pdf.

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19

Cerrilla, Cecilia. "Population crash of an endemic South African cyprinid: the role of non-native fish, drought and other environmental factors." Master's thesis, Faculty of Science, 2020. http://hdl.handle.net/11427/32205.

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Native freshwater fish are in decline worldwide due to human impacts including impoundment, changes to water quality, over-abstraction, climate change and the introduction of non-native species. South Africa's Cape Fold Ecoregion (CFE) harbours exceptionally high freshwater fish endemism, yet the majority of these species are threatened with extinction. The Clanwilliam sandfish (Labeo seeberi), an endangered cyprinid, has declined across its range in the CFE and currently exists in only a handful of tributaries of the Doring River in severely fragmented populations. The last remaining recruiti

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20

Rawson, Timothy Mark. ""In common with all citizens" : sportsmen, Indians, fish, and conservation in Oregon and Washington /." view abstract or download file of text, 2002. http://wwwlib.umi.com/cr/uoregon/fullcit?p3072604.

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Thesis (Ph. D.)--University of Oregon, 2002.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 330-363). Also available for download via the World Wide Web; free to University of Oregon users.

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21

Perkin, Joshuah Shantee. "Fragmentation in stream networks: quantification, consequences, and implications to decline of native fish fauna." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/14954.

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Doctor of Philosophy<br>Department of Biology<br>Keith B. Gido<br>Habitat fragmentation and loss threaten global biodiversity, but organism responses to changing habitat availability are mediated by structural properties of their habitats. In particular, organisms inhabiting dendritic landscapes with hierarchically arranged branches of habitat tend to have limited access to some patches even in the absence of fragmentation. Consequently, organisms inhabiting dendritic landscapes such as streams respond strongly to fragmentation. Using a combination of meta-analysis, field observations, and

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22

De, Vos Lauren. "Baited remote underwater video survey of reef fish in the Stilbaai marine protected area, with an assessment of monitoring requirements." Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/12181.

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Includes abstract.<br>Includes bibliographical references.<br>Long-term monitoring of changes in species abundance and community composition within marine protected areas (MPAs) is essential to assess whether conservation goals are being reached. The costs, logistics and sampling biases inherent to traditional monitoring methods limit sustainable monitoring in all MPAs along the South African coastline. Baited remote underwater video (BRUV) technology offers non-extractive monitoring with lower labour and cost requirements, whilst eliminating inter-observer variability and increasing statistic

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23

Hitchman, Sean M. "A mosaic approach can advance the understanding and conservation of native biodiversity in natural and fragmented riverscapes." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/38559.

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Doctor of Philosophy<br>Division of Biology<br>Martha E. Mather<br>Understanding the complex relationship between organismal distribution and spatial heterogeneity is central to many ecological questions. This challenge of identifying the biodiversity consequences of spatial patterns is especially critical for resource conservation at the larger riverscape scale because climate- and human-related impacts often act through intricate and spatially-connected organismal-habitat relationships. Specifically, resource managers cannot manage the adverse effects of common disturbances on aquatic ecosys

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24

Lopes, Keolohilani Harold Jr. "Effects of Open Circuit Scuba Exhaust on Reef Fish Surveys in the Main Hawaiian Islands." Thesis, University of Hawai'i at Hilo, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10287354.

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<p> The predominant method to quantify reef fish populations is the Open Circuit SCUBA (OC) <i>in-situ</i> fish survey. However, there are many biases associated with these surveys including the expelled OC exhaust which can cause visual and audible disturbances. This study aims to evaluate the bias created by OC exhaust utilizing closed-circuit rebreather (CCR) surveys, along surveys were conducted in protected areas and fished areas. The three sites in the main Hawaiian Islands were Kealakekua Bay (KK), Old Kona Airport (OA), and P&umacr;p&umacr;kea (PK) marine life conservation district. Th

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25

Datta, Amber W. "Conserving Fish and Forests: Community Involvement and Its Limits in Resource Management On the Island of Hawai'i." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/pomona_theses/76.

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In this thesis I examine the limits of community involvement in accomplishing the conservation goals of biodiversity and ecosystem function in resource management by analyzing the multiple interest groups that compose community. Two case studies are presented to accomplish this goal. The first case study is the West Hawaii Fisheries Management Area, where a group of community stakeholders provide management recommendations that are then implemented by the state. The second case study is the Ka’u forest reserve, where community involvement is invited into the management decision-making process

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26

Sternberg, David. "Life-History Traits and the Functional Diversity of Australian Freshwater Fish." Thesis, Griffith University, 2014. http://hdl.handle.net/10072/367236.

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Australian freshwaters are home to approximately 256 fish species from 36 families, many of which are endemic to the country and considered threatened, vulnerable or rare in the wild. In part this is due to a long history of continental isolation where increasing aridity and flow unpredictability have given rise to a fish fauna characterised by a unique association of life-history traits (i.e. characteristics of an organism that contribute to its fitness or performance, and which allow it to function in the environment) in order to cope with natural variation in environmental seasonality, stab

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27

Tingay, Ruth E. "Historical distribution, contemporary status and cooperative breeding in the Madagascar fish eagle : implications for conservation." Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430481.

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28

Vent, Danielle R. "Associations between riffles and aquatic biota following lowhead dam removal: implications for river fish conservation." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437641770.

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29

Carpenter-Bundhoo, Luke P. "Quantifying multi-scaled movements of Australian riverine fish to inform environmental flow management and conservation." Thesis, Griffith University, 2020. http://hdl.handle.net/10072/392886.

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Variation in river flow is a strong behavioral determinant for the movement of many freshwater fish species, and it enables them to complete key aspects of their life cycle. The alteration of natural flow regimes to meet human water demands has contributed substantially to declines in water-dependent biota in many parts of the world. Consequently, environmental flows are used as a remediation tool in some regulated rivers with the intention of restoring aspects of the natural flow regime to benefit native flora and fauna. Specification of appropriate environmental flows ideally requires empiri

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30

Clarke, Jo. "The role of spatial measures in the management and conservation of marine fish and invertebrates." Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/8009/.

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Historically sea fish were thought to be an inexhaustible resource, in 1882 Thomas Huxley recognised that it was possible to extirpate some fisheries such as the UK oyster and salmon fishery, but he thought "in relation to our present modes of fishing" sea fish were so abundant that they were inexhaustible. Fishing causes impacts other than overfishing, such as bycatch of non-target and vulnerable species discarding and damage to habitats and ecological communities. Fishing intensity has been increasing since the industrial revolution through which technological advances have given fishing ves

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31

Lynch, Patrick D. "Habitat and Fish Population Dynamics: Advancing Stock Assessments of Highly Migratory Species." W&M ScholarWorks, 2013. https://scholarworks.wm.edu/etd/1539616756.

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Fisheries sustainability is inherently linked to an understanding of the population-level effects of fishing. With an accurate characterization of historical fish and fishery dynamics, management agencies are more equipped to create regulations that sustain fishery resources over the long term. The overarching goal of this dissertation is to contribute to the advancement of fisheries stock assessment and promote resource sustainability. My research focused on highly migratory species (HMS), particularly fishes that reside in the open ocean. These species constitute some of the highest valued g

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32

Sleezer, Logan John. "Abundance Trends and Drivers of Change in Freshwater Fish Communities of the New River Basin." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/99149.

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Habitat destruction/alteration and non-native species are widely considered the two most serious threats to biodiversity within freshwater ecosystems, which are among the most threatened in the world. I examined the effects of these factors, specifically focusing on land use and non-native species as drivers of abundance patterns of native fishes in the highly invaded and anthropogenically impacted New River basin (NRB) in the Appalachian region of the United States. In chapter 2, I examine current native and non-native species abundance patterns related to the highly variable land-use mosaic

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33

Darwall, William Robert Thomas. "Spatial patterns and trophic modelling within the Lake Malawi demersal fish community : conservation and fisheries applications." Thesis, University of Hull, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402706.

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34

Kerwath, Sven Ebo. "Empirical studies of fish movement behaviour and their application in spatially explicit models for marine conservation." Thesis, Rhodes University, 2006. http://hdl.handle.net/10962/d1005121.

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This thesis investigates the movement behaviour of South African two coastal fish species and evaluates the effectiveness of marine protected areas (MPAs) in their protection and management. Its primary focus is on resolving the movement patterns of roman Chrysoblephus laticeps (Sparidae) in and around the Goukamma and Castle Rock MPAs in the Western Cape province of South Africa. A pilot study of the methodology investigated the movement behaviour of spotted grunter Pomadasys commersonnii (Haemulidae) in the sheltered East Kleinmonde Estuary in the Eastern Cape province. The application of di

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35

McMullin, Steve L. "Approaches to management effectiveness in state fish and wildlife agencies." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-05222007-091401/.

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36

Sanguinetti, Carolyn Anna Victoria. "Patterns in reef fish assemblages as determined by baited remote underwater video (BRUV) along the western side of False Bay: effects of site, depth and protection status." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/9791.

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Includes bibliographical references.<br>By protecting ecosystems from exploitation, no-take zones are considered the principal means by which marine species and their populations can be conserved for future generations. To be successful, no-take zones require continuous monitoring of the fish community to evaluate the response of marine ecosystems to anthropogenic impacts and environmental change. Obtaining an understanding of the patterns of species composition, abundance, and distribution, allows monitoring efforts to be focused, efficient, and properly interpreted. Baited remote underwater

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37

Bennett, Rhett Hamilton. "Movement patterns, stock delineation and conservation of an overexploited fishery species, Lithognathus Lithognathus (Pisces: Sparidae)." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1015709.

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White steenbras Lithognathus lithognathus (Pisces: Sparidae) has been a major target species of numerous fisheries in South Africa, since the late 19th century. Historically, it contributed substantially to annual catches in commercial net fisheries, and became dominant in recreational shore catches in the latter half of the 20th century. However, overexploitation in both sectors resulted in severe declines in abundance. The ultimate collapse of the stock by the end of the last century, and the failure of traditional management measures to protect the species indicate that a new management app

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38

Phang, S. C. "Predicting salmonid population ecology from individual fish responses to environmental changes : bridging behaviour, conservation and fisheries management." Thesis, Bournemouth University, 2013. http://eprints.bournemouth.ac.uk/21076/.

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Current habitat-association models used in the management of the socio-economically and ecologically important chalk stream salmonid populations fail to incorporate fish behaviour and the interactions between fish with their environment and this limits their ability predicting management-relevant salmonid population responses to environmental change. A salmonid individual-based model is parameterised to predict fish distributions and growth as the modelling approach address the weaknesses of current models. Virtual forager parameters are derived from published investigations and models of salm

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39

Mufudza, Pardon. "Impact of income generating projects on the rural livelihoods: the case of Mwenezi Fish Conservation Project, Zimbabwe." Thesis, University of Limpopo, 2016. http://hdl.handle.net/10386/1811.

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Thesis (M. Dev.) -- University of Limpopo, 2016<br>Most rural communities in developing countries are involved in various natural resource exploitation programmes to improve their livelihood status. The main objectives of the research were to assess the contribution of fish conservation as a strategy towards improving the livelihood status of people in Maranda Ward 9 in Mwenezi, Zimbabwe, and to ascertain the challenges in fish conservation and access to fishing activities. In this research, a questionnaire, interviews, focus group discussions and observations were used to gather informa

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40

Nugraha, Media fitri isma. "Genetic Diversity, Phylogeny and Conservation of Rainbowfish (Melanotaeniidae) in West Papua Indonesia and Its Prospect for New Ornamental Fish Commodity." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS208/document.

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Les poissons arc-en-ciel (Melanotaeniidae) se distribuent entre la Nouvelle-Guinée et l'Australie. Ils sont très recherchés en aquariophilie en raison de leur coloration remarquable. Il en existe un très grand nombre d’espèces, dont certaines figurent sur la liste rouge des espèces menacées. L’espèce Melanotaenia boesemani, l'une des plus populaires au sein de cette famille, est en voie de disparition. L’aquaculture de cette espèce apparaît donc comme une solution prometteuse pour limiter la capture de spécimens sauvages. Pourtant, le nombre de fermes qui élèvent M. boesmani est très faible. C

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Giarrizzo, Tommaso. "Importance of mangroves for fish bases for the conservation and sustainable management of mangrove ecosystems in North Brazil /." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=985227354.

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42

Moorman, Michelle. "The conservation implications of introduced trout and beaver on native fish in the Cape Horn Biosphere Reserve, Chile." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-02282007-215241/.

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Introduced species are a threat to native species conservation worldwide and can cause an overall reduction in biodiversity. In the Cape Horn Biosphere Reserve in southern Chile, introduced beaver and trout are highly successful invaders in the landscape and alter stream ecosystem function. Our research suggests introduced beaver create favorable feeding habitats for native puye (Galaxias maculatus) by increasing available macrobenthic biomass and creating ideal feeding conditions for puye. A negative effect of trout on puye was only detectable in favorable beaver-altered habitats where puye a

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43

van, der Walt Kerry-Ann. "Prioritising native fish populations for conservation using genetics in the Groot Marico catchment, North West Province, South Africa." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/69102.

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The Groot Marico catchment in the North West Province is a National Freshwater Ecosystem Priority Area (NFEPA) because it represents unique landscape features with unique biodiversity that are considered to be of special ecological significance. Three native freshwater species Amphilius uranoscopus, Chiloglanis pretoriae and Barbus motebensis, have high local conservation importance and B. motebensis is endemic to the catchment and is IUCN-listed as vulnerable. The main objective of this study is to contribute towards the effective conservation of these three species in the Groot Marico River

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Carter, Kathryn Sarah. "Pest or pastime? Coarse fish in Aotearoa/New Zealand." The University of Waikato, 2009. http://hdl.handle.net/10289/2790.

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Freshwater ecosystems are extremely important, both socially and ecologically, in Aotearoa/New Zealand. However, through detrimental practices of land-use change and the introduction of non-indigenous aquatic species, the health of freshwater areas is increasingly under threat. Coarse fish are one group of non indigenous fish that are largely perceived to have a negative effect on freshwater biodiversity and water quality. Despite this, there are people in New Zealand that value coarse fish highly, and consider their lives to be enriched through the practice of coarse angling. This thesis exam

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45

Jörgensen, Tove Lund. "Coral Reef Habitats and Fish Connectivity : Implications for coastal management and fishery." Doctoral thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-125595.

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Coral reefs have one of the highest levels of biodiversity of all ecosystems in the world and are important for both human livelihood and food security throughout many tropical countries. However, due to increased anthropogenic pressure on marine ecosystems, especially during the last couple of decades, coral reefs have become critically over-fished, and many reefs are now in a degraded state and are facing additional future threats due to further over-exploitation, chemical pollution, sedimentation, and effects of climate change. The main aim of this PhD thesis was to understand effects of an

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46

Ellender, Bruce Robert. "Ecological consequences of non-native fish invasion in Eastern Cape headwater streams." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/69065.

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The introduction, spread and concomitant impacts of non-native species are a global problem. Fish are among the most widely introduced vertebrate groups, with their impacts affecting multiple levels of organisation- from individuals, populations and communities, to entire ecosystems. In South Africa, the largest perceived threat to range-restricted endemic headwater stream fishes is said to be invasion by non-native fishes, however, as is the case elsewhere, invasive impacts are often a case of risk perception rather than actual risk analysis. Two range-restricted headwater species, the Easter

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Hatcher, Hunter R. "Establishing and Evaluating Agricultural Plantings and Supplemental Cover on Reservoir Mudflats as a Means to Increase Juvenile Game Fish Abundance and Growth." Thesis, Mississippi State University, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10974650.

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<p> Reservoirs throughout the country exhibit degraded shorelines and simplified littoral habitats because of aging. This study evaluated the establishment of agricultural plantings on reservoir mudflats and the effectiveness of supplemental brush pile structures in providing recruitment habitat for juvenile fish. The mudflats of Enid Reservoir, Mississippi were seeded during the winter drawdown in October of 2016 and 2017 with agricultural plantings. Monitoring of plantings found grasses performed best in terms of establishment and providing potential fish habitat. During Summer 2017 brush pi

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Silva, Rui Pedro Guerreiro Duarte Rivaes da. "Exploring riparian vegetation interactions with flow regime and fluvial processes for an improved river management and conservation." Doctoral thesis, ISA/UL, 2018. http://hdl.handle.net/10400.5/17516.

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Rolim, Fernanda Andreoli. "Effects of no-take marine reserves on fish assemblages in Brazil : an assessment using stereo-videos /." Rio Claro, 2019. http://hdl.handle.net/11449/182582.

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Orientador: Otto Bismarck Fazzano Gadig<br>Abstract: The establishment of no-take marine reserves (NTRs), i.e. areas with total fishing restrictions, has been an alternative worldwide aiming to preserve both biodiversity and ecosystem functions. Brazil has important NTRs with few studies describing their relevance and efficiency for marine life. With this, the central objective of this thesis was to evaluate the effects of NTRs on fish assemblage, testing the hypothesis that the differences in richness, abundance, biomass and fish body size is more explained by protection status than environme

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O'Keefe, Daniel Mark. "Conservation and management of paddlefish in Mississippi with emphasis on the Tennessee-Tombigbee Waterway." Diss., Mississippi State : Mississippi State University, 2006. http://sun.library.msstate.edu/ETD-db/ETD-browse/browse.

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