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Dissertations / Theses on the topic 'Stock fish'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Storey, Susan. "Spatial-temporal fish stock assessment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ28463.pdf.

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2

Fewings, Graham Adrian. "Resistive properties and detection of fish." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340366.

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3

Ernst, Billy. "An investigation on length-based models used in quantitative population modeling /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/5281.

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4

Hammond, Tim. "Nonignorable missing data in acoustic fish stock assessment." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69664.

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This thesis deals with in situ estimates of fish target strength distribution which are important in acoustic stock assessment. The data were gathered on Newfoundland's Grand Banks in 1992 using a dual-beam sonar system. In situ measures of target strength distribution are biased unless a correction is made for nonignorable missing data because high target strength fish can be detected more readily than low target strength ones.<br>Two methods of correcting for the bias are described and implemented. Both methods use measured off-axis angle and rely on the accuracy of these angle measurements

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5

Kitterman, Christy L. "An assessment of barotrauma and the stock characteristics of Tennessee River sauger populations a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2009. http://proquest.umi.com/pqdweb?index=4&did=1908035871&SrchMode=1&sid=1&Fmt=6&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1265309878&clientId=28564.

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6

Berejikian, Barry A. "The effects of hatchery and wild ancestry and environmental factors on the behavioral development of steelhead trout fry (Oncorhynchus mykiss) /." Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/5400.

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7

Linton, Brian C. "Population dynamics of a recovering lake trout population in Wisconsin waters of Lake Superior, 1980-2001 /." View abstract (PDF format), 2002. http://epapers.uwsp.edu/abstracts/2002/linton.pdf.

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8

Brickhill, Michael John. "Enhancement of Fish Stock by Habitat Manipulation in Artificial Waterways." Thesis, Griffith University, 2009. http://hdl.handle.net/10072/367810.

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Two widely-recognised hypotheses propose that increases in fish abundance at artificial reefs are caused by: (a) the attraction and redistribution of existing individuals; and/or (b) the addition of new individuals by production. Inadequate experimental designs compromised by a lack of sufficient replication and/or spatial interspersion of reefs with controls have prevented researchers from distinguishing between attraction and production. Infrequent sampling has also led to insufficient temporal coverage of life history-driven variations in fish abundance and biomass at reefs. Detection an

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9

Dunn, Matthew Richard. "The exploitation of selected non-quota species in the English Channel." Thesis, University of Portsmouth, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301983.

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10

Beltz, Morgan. "The Declining Natural Fish Stock: A Proposed Solution to Public Fear and Perceptions of Genetically Modified Fish." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/cmc_theses/765.

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The global fish population is declining. Aquaculture production is saturated and the global fish stock is operating at an unsustainable level. Genetically modified (GM) fish is a potential solution to relieve the natural fish stock, if the FDA grants the approval. The global fish population is harmed by environmental conditions and the inability for fish to adapt to changing conditions and human interactions. Genetic modification is a growing technology that has the ability to alleviate the fishing industry by modifying fish to grow faster, be disease tolerant, eat plant-based food, and be mor

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11

Errigo, Michael. "Structured Errors in Modeling Fishery Population Dynamics and in Stock Assessment." Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/ErrigoM2008.pdf.

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12

Kassler, T. W. "Genetic assessment of two stizostedion species and their hybrid in the Ohio River, final report." [Champaign, Ill.] : Illinois Natural History Survey, Center for Aquatic Ecology, 2000. http://hdl.handle.net/2142/10599.

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Includes bibliographical references.<br>"Submitted to Ohio Division of Wildlife." "The first objective was to determine the accuracy of field identification of individual fish to species and to assess the extent of hybridization between walleye and sauger ... The second objective was to assess genetic variation in both species ... " -- p.3. Also available in print.

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13

Akhter, Jubaida Nasreen. "Scale and impacts of fish stock enhancement activities in three regions." Thesis, University of Hull, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402717.

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14

Weintroub, Jonathan. "Fish stock assessment by a statistical analysis of echo sounder signals." Master's thesis, University of Cape Town, 1986. http://hdl.handle.net/11427/19509.

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A means of assessing the quantity of exploitable fish in the sea is a requirement for effective management of the resource. Sonar is widely used in this regard, as it provides a rapid means of assessment. Two acoustic assessment techniques currently used are the echo counting and echo integration· methods. The echo counting method requires that only single fish echoes are present in the backscatter from the shoal, while the echo integration technique requires an a-priori knowledge of the average target strength of the fish in the shoal. A novel method of assessment has been proposed. It relies

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15

Lucato, Silvia Helena Bulizani. "An improved mixed-error non-equilibrium stock-production model and its application to some Brazilian fish stocks." Thesis, University of Southampton, 2006. https://eprints.soton.ac.uk/41360/.

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A new and more comprehensive estimation method for stock-production models is proposed, to provide more reliable stock assessment when data availability is limited. Using difference equations to implement a non-equilibrium production model, the new approach (named POEEM, for Process and Observation Errors Estimation Method) incorporates uncertainties due to both process and observation errors, employing a non-linear model fitting approach. The method has been evaluated using both simulated and real data sets, and has been applied to data from some Brazilian fish stocks. The weighting ratio bet

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16

Corradin, Lisa M. "Recruitment and growth dynamics of lake trout in western Lake Superior /." Link to Abstract, 2004. http://epapers.uwsp.edu/abstracts/2004/Corradin.pdf.

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17

Northrop, Amanda Rosalind. "Importance of various data sources in deterministic stock assessment models." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1002811.

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In fisheries, advice for the management of fish populations is based upon management quantities that are estimated by stock assessment models. Fisheries stock assessment is a process in which data collected from a fish population are used to generate a model which enables the effects of fishing on a stock to be quantified. This study determined the effects of various data sources, assumptions, error scenarios and sample sizes on the accuracy with which the age-structured production model and the Schaefer model (assessment models) were able to estimate key management quantities for a fish resou

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18

Hammond, Tim R. "Classification of fish schools from acoustic survey data /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/5351.

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19

Deng, Xiaoying. "A comparative analysis of fish stock assessment methods, spatial-temporal versus VPA." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ57106.pdf.

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20

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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21

Roa-Ureta, Ruben, and n/a. "Estimation of fish biomass indices from catch-effort data : a likelihood approach." University of Otago. Department of Mathematics & Statistics, 2009. http://adt.otago.ac.nz./public/adt-NZDU20090818.150508.

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Two dimensional stocks of fish can be assessed with methods that mimic the analysis of research survey data but that use commercial catch-effort data. This finite population approach has scarcely been used in fisheries science though it brings about very large sample sizes of local fish density with models of only moderate levels of complexity. The extracted information about the status of the stock can be interpreted as biomass indices. Statistical inference on finite populations has been the locus of a highly specialized branch of sampling-distribution inference, unique because observable va

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22

Reis, Enir Girondi. "An assessment of the exploitation of the white croaker Micropogonias furieri (Pisces, Sciaenidae) by the artisanal and industrial fisheries in coastal waters of southern Brazil." Thesis, University of East Anglia, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332297.

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23

Greig, Antonio Bernardo. "The potential application of acoustic methods in North Sea demersal fish stock surveys." Thesis, University of Aberdeen, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485677.

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In the North Sea, groundfish stock assessment relies on independent bottom trawl surveys to tune the annual indices that are estimated from commercial landings. These surveys have been carried out by several European fishery institutions since the mid 19605 under standardized protocols which have allowed a long time series to be built for the main commercial stocks. An echo-integration survey is an independent metliod with a high ' sampling rate that can be carried out underway. Although it is successfully used on some stocks in the Barents Sea and off the North American Pacific coast, this me

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24

Wraith, James A. "Assessing reef fish assemblages in a temperate marine park using baited remote underwater video." School of Biological Sciences, 2007. http://ro.uow.edu.au/theses/12.

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Baited remote underwater video (BRUV) is becoming an increasing popular tool for examining reef fish assemblages in depths less than 100m. This sampling technique is relatively new in the literature and several gaps remain to be filled. Scientists using this technique have selected bait based on results from trapping experiments. Therefore the first objective of the study was to compare commonly used baits and test if different fish species and fish assemblages were recorded. I planned to apply results from the first study towards further research using BRUV. Management at Jervis Bay Mari

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25

Caneco, Bruno. "Modelling catch sampling uncertainty in fisheries stock assessment : the Atlantic-Iberian sardine case." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/4474.

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The statistical assessment of harvested fish populations, such as the Atlantic-Iberian sardine (AIS) stock, needs to deal with uncertainties inherent in fisheries systems. Uncertainties arising from sampling errors and stochasticity in stock dynamics must be incorporated in stock assessment models so that management decisions are based on realistic evaluation of the uncertainty about the status of the stock. The main goal of this study is to develop a stock assessment framework that accounts for some of the uncertainties associated with the AIS stock that are currently not integrated into stoc

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26

Bailey, Michael Matthew. "Population Ecology and Natural Selection in Juvenile Atlantic Salmon: Implications for Restoration." Fogler Library, University of Maine, 2009. http://www.library.umaine.edu/theses/pdf/BaileyM2009.pdf.

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27

Rajakaruna, Harshana. "Analysis of retrospective error in an adaptive frame work for virtual population analysis /." http://collections.mun.ca/u?/theses,175401, 2003. http://collections.mun.ca/u?/theses,175401.

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28

Herrera, Guillermo E. "Spatial structure and informational asymmetry in the economics of multiple stock renewable resources /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/7425.

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29

Labay, Steven R. "An evaluation of Lake Michigan alewife aging methodologies, growth, and stock separation." Virtual Press, 2005. http://liblink.bsu.edu/uhtbin/catkey/1315170.

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Ageing methodologies of Lake Michigan alewife were evaluated as a precursor to growth and condition investigations of alewife stocks. Four commonly used aging tissues were evaluated including: otoliths, scales, vertebrae, and opercles. Otoliths were significantly more precise than other structures in all analyses. The accuracy of age determinations given by otoliths was corroborated through length frequency analysis. Total processing time was highest for scales. Whole otolith methodology was used to age alewives from Indiana, Michigan, and Wisconsin based on precision, accuracy, and time effic

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30

Martins, de Lucena Flavia. "Species interaction in fish stock assessment and management in southern Brazil : a bio-economic approach." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327604.

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31

Palmer, Ryan Michael. "The feasibility of stock enhancement as a management tool for dusky kob (Argyrosomus japonicus) in South Africa." Thesis, Rhodes University, 2008. http://eprints.ru.ac.za/1291/.

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32

Spencer, Nicole J. C. "Marine stock enhancement : a critical review of the past and a look to the future within coastal community-based marine reserves /." Internet access available to MUN users only, 2003. http://collections.mun.ca/u?/theses,166186.

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33

Leonard, David Michael DeVries Dennis R. Wright Russell A. "Investigating interactions between channel catfish and other sport fishes in Alabama's state public fishing lakes." Auburn, Ala, 2009. http://hdl.handle.net/10415/1595.

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34

Sun, Man. "Simulation testing of the performance of methods for fish stock assessment and short-term catch forecasts." Thesis, University of East Anglia, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329321.

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35

Duncan, Murray. "The genetic stock structure and distribution of Chrysoblephus Puniceus, a commercially important transboundary linefish species, endemic to the South West Indian Ocean." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1011868.

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Chrysoblephus puniceus is an over-exploited linefish species, endemic to the coastlines off southern Mozambique and eastern South Africa. Over-exploitation and habitat loss are two of the biggest threats to the sustainability of fisheries globally. Assessing the genetic stock structure (a prerequisite for effective management) and predicting climate related range changes will provide a better understanding of these threats to C. puniceus which can be used to improve the sustainability of the fishery. Two hundred and eighty four genetic samples were collected from eight sampling sites between P

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36

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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37

Rios, Adyan Beatriz. "Do hurricanes and other severe weather events affect catch per unit effort of reef-fish in the Florida Keys?" Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/32885.

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Severe weather events frequently affect important marine fish stocks and fisheries along the United States Atlantic and Gulf of Mexico coasts. However, the effects of these events on fish and fisheries are not well understood. The availability of self-reported data from two fisheries in a region frequently affected by tropical cyclones provided a unique opportunity to investigate short-term responses to past events. This study involved selecting severe weather events, calculating changes in effort and catch-per-unit- effort (CPUE), and analyzing those changes across various temporal, spatia

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38

Siegfried, Kate I. "Fishery management in data-limited situations : applications to stock assessment, marine reserve design and fish by catch policy /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2006. http://uclibs.org/PID/11984.

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39

Mathias, Karin L. "Growth and survival of juvenile sockeye salmon (Oncorhynchus nerka) in three Northwestern British Columbia lakes - an evaluation of an International Stock Enhancement Program." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0002/MQ59547.pdf.

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40

Vigier, Audric. "Développement d'une plateforme d'évaluation de plans de gestion spatialisés : application à la pêcherie mixte démersale du golfe de Gascogne." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0033/document.

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La gestion des pêches en Atlantique Nord-Est s'oriente vers une régionalisation, prenant en compte les interactions techniques caractéristiques des pêcheries mixtes. Ceci nécessite une compréhension et une évaluation des dynamiques spatio-temporelles des espèces exploitées et des flottilles qui les exploitent. Cette thèse vise à proposer un outil pour évaluer les conséquences de stratégies de gestion dans le golfe de Gascogne. Elle se focalise sur le stock de merlu Nord (Merluccius merluccius) et la pêcherie mixte démersale merlu - sole (Solea solea) – langoustine (Nephrops norvegicus) du golf

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41

Ishimura, Gakushi. "Transboundary management of a fish stock under climate variability : the case of Pacific sardine in the California current ecosystem." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/23246.

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The time variant/asymmetric distribution of a fish stock caused by ocean climate variability is one of the challenges that must be overcome to establish cooperative management of a transboundary fish stock. Pacific sardine (Sardinops sagax) exhibits extreme decadal variability in its abundance and geographic distribution that corresponds to water temperature regime shifts within the California Current Ecosystem. It is a transboundary fish stock and targeted by Mexican, American and Canadian fisheries, and the three countries do not currently have a cooperative management arrangement. This th

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42

Murray, Taryn Sara. "Movement patterns and genetic stock delineation of an endemic South African sparid, the Poenskop, Cymatoceps nasutus (Castelnau, 1861)." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1001514.

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Poenskop Cymatoceps nasutus (Pisces: Sparidae), an endemic South African sparid, is an important angling species being predominantly targeted by the recreational shore and skiboat sector. This species is slow-growing, long-lived, late-maturing and sex-changing, making poenskop acutely sensitive to over-exploitation. Despite interventions, such as the imposition of size and bag limits (currently 50 cm TL and one per licensed fisher per day) by authorities, catch-per-unit-effort trends reflect a severe and consistent stock decline over the last two decades. Poenskop has been identified as a prio

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43

Huchzermeyer, Carl Friedrich. "Fish and fisheries of Bangweulu wetlands, Zambia." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1003927.

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Bangweulu Wetlands is a 6000 km² public-private-partnership conservation area in northeastern Zambia, lying on the south-eastern margins of the Bangweulu Swamps, Congo River system. The area is important for wildlife conservation, tourism and as a fishing ground for the local inhabitants. This study provides a baseline of the fish and fisheries of this area. The conservation area is situated on the transition zone between woodland, floodplain and swamp. A total of 42 fish species representing 12 taxonomic families were collected. The fish fauna of the area was characterised by a diversity of s

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44

Marohn, Lasse [Verfasser]. "Microchemical analyses of otoliths in Baltic Sea fish : Possibilities and limitations of otolith elemental analysis to describe individual life history and stock characteristics of fish in the Baltic Sea / Lasse Marohn." Kiel : Universitätsbibliothek Kiel, 2011. http://d-nb.info/1020244720/34.

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45

Gedamke, Todd. "Developing a stock assessment for the barndoor skate (Dipturus laevis) in the Northeast United States." W&M ScholarWorks, 2006. http://web.vims.edu/library/Theses/Gedamke06.pdf.

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46

Hill, Evelyn June. "Applying statistical and syntactic pattern recognition techniques to the detection of fish in digital images." University of Western Australia. School of Mathematics and Statistics, 2004. http://theses.library.uwa.edu.au/adt-WU2004.0070.

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This study is an attempt to simulate aspects of human visual perception by automating the detection of specific types of objects in digital images. The success of the methods attempted here was measured by how well results of experiments corresponded to what a typical human’s assessment of the data might be. The subject of the study was images of live fish taken underwater by digital video or digital still cameras. It is desirable to be able to automate the processing of such data for efficient stock assessment for fisheries management. In this study some well known statistical pattern classif

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47

Booth, Anthony John. "Biology, stock assessment and management of the panga Pterogymnus laniarius on the Agulhas Bank, South Africa." Thesis, Rhodes University, 1998. http://hdl.handle.net/10962/d1005085.

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The panga, Pterogymnus laniarius (Cuvier, 1830), is a South African endemic sparid fish species. On the Agulhas Bank, South Africa it is a commercially important species, caught as bycatch in the hake directed trawlfisheries and targeted by offshore hook-and-linefishers. Recently there has been considerable interest shown in directing further fishing effort on this species. The lack of a suitable management procedure for teleost bycatch in South Africa was the principal reason for undertaking this study. This thesis investigates aspects the panga's life history, particularly those aspects that

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48

Leone, Agostino <1986&gt. "Genomic applications in fish traceability and fishery stock management: phylogeography and population structure of the Mediterranean-Atlantic blue shark, Prionace glauca." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8672/1/Leone_Agostino_Tesi.pdf.

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The abundance of blue sharks, Prionace glauca, Linnaeus 1758 (BS), has dramatically declined over the last century in the Mediterranean Sea (a reduction of 75% over the last 30 years). In this study, the combination of a near-capillary sampling strategy of BS in several areas of the basin together with the development and use of genomic markers - that can represent both neutral and selective markers - offers the opportunity to assess and visualize for the first time for this poorly studied and vulnerable species population structure and potentially local adaptation. The phylogeography between

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49

Davis, Michelle L. "Assessment of the South Atlantic red porgy (Pagrus pagrus) population under a moratorium." Connect to this title online, 2003. http://scholar.lib.vt.edu/theses/available/etd-01062004-090503/.

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50

Boyd, Danielle Winona. "Fishery, population dynamics and stock assessment of geelbek (Atractoscion aequidens), a commercially important migrant fish species off the coast of South Africa." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/27895.

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Geelbek (Atractoscion aequidens) is an important fish species in South Africa's linefishery, a fishing sector defined by its fishing gear of rod and reel or handline. Distributed from Cape Point (34°21'S, 18°29'E) on the south west coast to Kosi Bay (26°51'S, 32°53'E) on the east coast, they are targeted throughout their range by the commercial linefishery, recreational anglers and small-scale fishers. The majority of geelbek are caught on the Agulhas Bank during austral summer. Due to current minimum size limits of 600 mm (total length, TL), well below the 50% size-at-maturity (950 mm TL), th

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