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Tesis sobre el tema "Fishes Fishes Fishes Oxygenases"

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Publicado: 4 de junio de 2021

Última modificación: 10 de febrero de 2022

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1

Situ, Yingyi. "Ichthyoplankton assemblage at Cape d'Aguilar seasonal variability and family composition /". Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38993387.

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2

Rinne, John N. "Flows, Fishes, Foreigners and Fires: Relative Impacts on Southwestern Native Fishes". Arizona-Nevada Academy of Science, 2003. http://hdl.handle.net/10150/296624.

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3

Kennon, Ronald Adam. "Effects of spatial and temporal variability of shoal habitat on stream fish assemblages in Chattahoochee tributaries, Alabama". Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/KENNON_RONALD_29.pdf.

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4

Mills, Lesley Judith. "Effects of endocrine-disrupting chemicals on fish reproduction and reproductive indicators /". View online ; access limited to URI, 2006. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3248238.

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5

Baines, David Christian. "Tooth microwear in fishes". Thesis, University of Leicester, 2010. http://hdl.handle.net/2381/8753.

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The published articles, p. 149 onwards, are not available in the electronic version of this thesis due to copyright restrictions. The full version can be consulted at the University of Leicester Library.

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6

Turner, Jonathan Russell. "Vision in marine fishes". Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528093.

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7

Horton, Jonathan F. "Dynamic responses of a 20-ton capacity feed buoy in an open ocean environment". Restricted access (UM), 2008. http://libraries.maine.edu/gateway/oroauth.asp?file=orono/etheses/37803141.pdf.

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These (M.S.)--University of New Hampshire, 2008.
Title from PDF title page. Available through UMI ProQuest Digital Dissertations. Includes bibliographical references (leaves 58-59). Also issued in print.

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8

Bjorgo, Kimberly A. "Distributional ecology of Kanawha River fish". Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4814.

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Thesis (Ph. D.)--West Virginia University, 2006.
Title from document title page. Document formatted into pages; contains vii, 195 p. : ill. (some col.), col. maps. Vita. Includes abstract. Includes bibliographical references.

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9

Fast, David E. "The behavior of salmonid alevins in response to changes in dissolved oxygen, velocity and light during incubation /". Thesis, Connect to this title online; UW restricted, 1987. http://hdl.handle.net/1773/5363.

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10

Armstrong, Sharyn G. "Chemical analysis of nutritionally important components in temperate Australian fish /". [S.l. : s.n.], 1992. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030521.112132/index.html.

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11

Smith, Jonathan Staunton. "The biology and ecology of Ponyfish (Leiognathidae) in the Gulf of Carpentaria, Northern Australia /". St. Lucia, Qld, 2000. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16109.pdf.

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12

Wood, Stephen William. "Systematics of the macrourid fishes". Thesis, University of Cambridge, 1996. https://www.repository.cam.ac.uk/handle/1810/263146.

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The systematics of rattail fishes (Teleostei: Gadiformes, Macrouridae) is reexamined focussing on the Coryphaenoides group of genera, including Albatrossia, Lionurus, Chalinura and Nematonurus. The data matrix consists of 69 osteological characters based on personal observations, 17 characters, generally of the soft anatomy, from various published sources and 34 characters reported from peptide mapping of muscle-type lactate dehydrogenase. An evolutionary systematics of morphology requires, firstly, a historical concept of homology and secondly, a scientific basis for the recognition of patterns. Viewing the organism as a hierarchy of constraint, homology is a relationship of development constraint inherited by parts of organisms. Taxa are types, relationships of constraint inherited by organisms. If, from the morphological perspective, taxa are relationships not groups, conventional concepts of monophyly and related terms cannot apply to them. In practice they describe comparisons between trees. The creation/discovery of patterns is embedded in the practice of systematics and has its basis in the intelligent abilities of human beings. Morphology deals with the linguistic aspect of evolution, rather than with its dynamic genetic aspect. Dynamic and linguistic aspects are complementary yet incompatible. The scientific status of morphology is shown to rest on this principle of complementarity. Through cladistic analysis of a large number of published characters, I investigate the scenarios and relationships of gadiform fishes that have recently been proposed. The results of the rattail analysis are thus placed within the broader context of gadiform ecology and evolution. In cladistics, parsimony plays the role of Popper's-empirical concept of simplicity, as a method of estimating the hypothesis of highest empirical support. Assumptions are made about the likely pathways of evolution in the way the characters are coded. Original classifications of the Gadiformes and the Macrouridae are proposed. Within the gadiforms there is a general trend from jaw precision to jaw protrusion. An index of protrusion/precision shows a negative correlation with depth. Rattails show low values of the index indicating high jaw protrusion. However, within the family the trend is towards higher jaw precision, and the precision/protrusion index is positively correlated with maximum depth. The discovery of cartilage in the exoskeleton of rattail fishes was an unforeseen result of the method of preparation. In rattails alcian blue reveals hyaline cell cartilage at the margins of certain dermal elements where it is gradually replaced by bone.

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13

Walker, Jennifer L. "Parasites of catostomid fishes from navigation pools 8 and 9 of the upper Mississippi River (Iowa, Minnesota, Wisconsin) and the lower Missouri National Recreational River (Nebraska, South Dakota) /". Connect to online version of: Parasites of catostomid fishes from navigation pools 8 and 9 of the upper Mississippi River, 2007. http://digital.library.wisc.edu/1793/21447.

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14

Miller, Jessica Adele. "Local and regional patterns of transport, dispersal, and exchange in coastal fishes /". view abstract or download file of text, 2004. http://wwwlib.umi.com/cr/uoregon/fullcit?p3136435.

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Thesis (Ph. D.)--University of Oregon, 2004.
Typescript. Includes vita and abstract. Includes bibliographical references (leaves 215-240). Also available for download via the World Wide Web; free to University of Oregon users.

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15

Geange, Shane Wallace. "An evaluation of prior residency and habitat effects on the persistence of settling reef fishes : a thesis submitted to the Victoria University of Wellington in fulfilment of the requirements for the degree of Doctor of Philosophy in Marine Biology /". ResearchArchive@Victoria e-Thesis, 2010. http://hdl.handle.net/10063/1169.

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16

Boyd, James W. "Effects of water temperature and angling on mortality of salmonids in Montana streams". Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/boyd/BoydJ0808.pdf.

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In Montana, angling closures are used to protect salmonids from the deleterious impacts of angling at elevated water temperatures (23Â°C). Catch-and-release angling (CR) studies have reported high levels (30-40%) of salmonid mortality at water temperatures >20Â°C, but few studies assess CR mortality of salmonids at water temperatures observed in Montana streams during mid-summer (23Â°C). The primary objective of this study was to measure CR mortality of rainbow trout, brown trout, and mountain whitefish in three water temperature treatments; when daily maximum water temperatures were cool (<20Â°C), warm (20 to 22.9Â°C), and hot (23Â°C). A secondary objective was to assess CR mortality of salmonids angled in morning and evening within water temperature treatments. Based on the literature, mortality of salmonids was predicted to be >30% within the hot treatment and higher in evening than morning. Angling (fly-fishing only) occurred in the Gallatin and Smith rivers. All angled fish were confined to in-stream holding cages and monitored for mortality for 72 h. Mortality of rainbow trout Oncorhynchus mykiss increased to 9% and 16% in warm and hot treatments, respectively. Mortality of brown trout Salmo trutta was (4%) in the hot treatment in the Smith River. Mountain whitefish Prosopium williamsoni had increased mortality in the warm (20%) and hot (28%) treatments in the Smith River. No mortality for any species occurred in either river when water temperatures were <20Â°C. Mortality of rainbow trout angled in evening was higher than morning in the warm (14%) and hot (16%) treatments in the Smith River. Laboratory results indicated rainbow trout stressed in evening had higher mortality (7%) than those stressed in morning (0%). Angler catch rates were lower for most species in evening than morning angling events; however, catch rates remained high (0.7 fish/h) in several evening angling events. Study results indicate that salmonid mortality rates associated with catch-and-release fly-fishing are higher at elevated (>or equal to 23Â°C) water temperatures. Although there was a relationship between elevated water temperature and salmonid mortality, most of the mortality estimates were well below the 30% mortality that was predicted.

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17

Kayle, Kevin Adams. "Fish use of different habitat structure locations and configurations within a reservoir /". Connect to resource, 1986. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1244655820.

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18

Stefferud, Jerome A. y John N. Rinne. "Sustainability of Fishes in Desert River: Preliminary Observations on the Roles of Streamflow and Introduced Fishes". Arizona-Nevada Academy of Science, 1995. http://hdl.handle.net/10150/296454.

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From the Proceedings of the 1995 Meetings of the Arizona Section - American Water Resources Association and the Hydrology Section - Arizona-Nevada Academy of Science - April 22, 1995, Northern Arizona University, Flagstaff, Arizona

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19

Woolley, Lindsey. "The development of a practical diet for juvenile dusky kob, Argyrosomus japonicus, for the South African mariculture industry". Thesis, Rhodes University, 2009. http://eprints.ru.ac.za/1568/.

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20

Wood, A. D. (Aidan David). "A contribution towards the taxonomy of the ichthyoplankton species community and an understanding of its dynamics along the south-east coast of South Africa". Thesis, Rhodes University, 1999. http://hdl.handle.net/10962/d1006124.

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This study was prompted by the need to remedy the situation that existed with respect to the poor status of our knowledge regarding the ichthyoplankton assemblage of the nearshore region along the south-east Cape coast of South Africa. The first chapter provides a brief introduction to the field of ichthyoplankton research and includes a summary of the status of research in southern Africa and an explanation of early life history terminology. The selection of all sample sites, times and strategies is also outlined. The study area along the south-east Cape coast with respect to its location, climate and physical oceanography is described in the second chapter, as is the gear used, bongo nets and an RMT1x6. A sampling protocol for the use of bongos from a small ski-boat, and the RMT from the research vessels, and for the handling and processing of samples was established. The selection of Middlebank as the main monthly sampling site within the Tsitsikamma National Park (TNP) was based on taxonomic diversity as well as logistical and safety constraints. The effect of mesh size and time of sampling with bongo nets on the catchability of ichthyoplankton was investigated in chapter three. Most data was accumulated during Sea Fisheries research cruises, with additional collections coming from the National Parks vessel. Although the differences were not significant, the 505 μ mesh nets captured larger larvae, with catches comprising higher percentages of flexion and postflexion larvae. Larval concentration and size were consistently greater in samples from periods of reduced light intensity, but significant differences were the exception. It was decided that sampling with 505 μ mesh nets during daylight would provide a representative sample of the available ichthyoplankton assemblage, while at the same time being the most practical and least time consuming with respect to handling, clogging and backflushing. In chapter four, the early life history stages of thiny of the seventy-five taxa sampled are described, reflecting the paucity of information which existed on the ichthyoplankton of the nearshore zone in the south-east Cape. These descriptions are seen as an important contribution towards any future research efforts in the region, but as many of these descriptions are based on few or single specimens, it is realised that the description of egg and larval stages will be an ongoing process. Based upon the data collected during this study, an ichthyoplankton species checklist was established in chapter five. Seventy-five taxa of fish larvae were identified to either family, genus or species level. A number of squid para-larvae were also encountered. Similarities and discrepancies with a previous survey in the region are presented. The temporal distribution of eggs and larvae between August 1993 and October 1996 was established, and the spatial distribution of ichthyoplankton along an offshore transect was determined between January 1995 and May 1996. Only 7 species from Middlebank and twelve from all stations combined displayed seasonal trends, with most of these being prevalent during winter months. Egg production, both over Middlebank and from all stations combined, appeared to be consistent, with no seasonal trends. Based upon the results from the offshore transect samples, it would appear that a single ichthyoplankton assemblage exists from Storms River out to fifteen nautical miles. Although a variety of statistical methods were applied to the data during this study, low egg and larval concentrations and a low sampling frequency meant that results had to be interpreted carefully. Chapter six describes the preliminary investigation into the vertical distribution of eggs and larvae. During two research cruises, discrete depth sampling using an RMT1x6 net was performed, with the majority of samples being accompanied by physical data provided by a CTD rosette sampler. No definite patterns could be seen as larval concentrations were low, and the short time scale did not allow for the identification of any diel migratory patterns. The relationship between total larvae and the physical environment was poor. The only possible relationship was that between plankton volume and total egg and total larval concentrations. The TNP may play an important role in the conservation of reef fish and the seeding of nearby fishing grounds through the export of pelagic eggs and larvae. Chapter seven describes a preliminary investigation into the dispersal potential of ichthyoplankton from the TNP. Based upon longshore currents determined from drogues, ADCP vectors and current meter readings, it was clear that if larvae were passive drifters, the potential for their dispersal from the TNP did exist. This pilot study showed that future work should concentrate not only on the oceanographic aspects, but on behavioural aspects of larvae which may enhance or retard dispersal. In the final discussion, it is emphasised that while this study went a long way to increasing our knowledge of the nearshore ichthyoplankton community, the true picture of the temporal and spatial dynamics of the species assemblage may only be revealed once more intensive sampling has been performed. The resolution of the early life history stages of the sparids and the identification of eggs to species level are seen as priorities for the near future. A complete species checklist for the TNP is provided based upon previous surveys (both on adult and larval fishes), this work and personal observations. A total of 171 species of fish from 70 families were identified, illustrating that the eggs and larvae of many species in the TNP have yet to be sampled. A brief description of the collaborative effort which is envisaged for the TNP over the next few years is provided.

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21

Casper, Brandon M. "The hearing abilities of elasmobranch fishes". [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001768.

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22

Macfarlane, Christopher Pau. "Gametic interactions in externally fertilising fishes". Thesis, University of Liverpool, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288245.

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23

Genner, Martin Jones. "Coexistence of Lake Malawi cichlid fishes". Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302317.

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24

Sweetman, Christopher James. "Consumption Patterns of Chesapeake Bay Fishes". W&M ScholarWorks, 2018. https://scholarworks.wm.edu/etd/1550153634.

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As fisheries management moves away from single-species approaches and towards more holistic, ecosystem-based approaches, physiological and ecological interactions need to be explicitly considered and mechanistically understood. Accurate portrayals of food web interactions and the direction and magnitude of energy flow between predator and prey populations are fundamental components to further develop ecosystem-based fisheries management (EBFM). to bolster information that is required within an EBFM framework in the Chesapeake Bay, I conducted research designed to advance traditional dietary studies and better understand the form and structure within the Bay's food web. This research relied on controlled feeding experiments, comprehensive sampling of predator and prey communities, and over 10 years of data from the Chesapeake Bay Monitoring and Assessment Program (ChesMMAP) and the Juvenile Fish and Blue Crab surveys. The dissertation presented here has two main objectives: 1) incorporate additional methodologies to improve stomach content identification, and 2) examine the drivers of trophic interactions and consumption within a suite of abundant and economically valuable predatory fishes in the Chesapeake Bay. Prey that is considered unidentifiable is often ignored in stomach content analyses, but can account for a significant proportion of fish diets. in Chapter 1, I demonstrate the use of molecular techniques to detect specific prey consumed by Atlantic croaker (Micropogonias undulatus) and evaluate factors that influence the rate of gastric evacuation. Molecular protocols developed to identify specific prey DNA from stomach contents determined that DNA from blue mussel (Mytilus edulis) can be detected as long as prey resides in the stomach (~30 hours), which is long after prey can be considered visually identifiable. Furthermore, temperature significantly influenced gastric evacuation rates and therefore should be considered throughout the collection process to ensure accurate identification of prey. Chapter 2 evaluated prey selection patterns among three sympatric predators in the Chesapeake Bay: weakfish (Cynoscion regalis), summer flounder (Paralichthys dentatus), and Atlantic croaker. Comprehensive sampling of predator and prey (midwater, zooplankton, benthic) populations revealed selection patterns on dominant prey selection taxa driven by a variety of mechanisms. Bay anchovy selection was significantly influenced by predator size in both weakfish and summer flounder. Mysid selection was driven by both fish size and Julian Day in weakfish and by temperature in summer flounder. Atlantic croaker select for both polychaetes and bivalves, with selection patterns relating to predator size and Julian Day. to evaluate how trophic linkages and environmental conditions influence consumption, bioenergetics models were developed in Chapter 3 for young-of-the-year Atlantic croaker and weakfish. Annual consumption from 2006 – 2016 was estimated and subsequent analyses demonstrated that prey abundance metrics significantly influenced the observed consumption patterns. This research represents a comprehensive study on predator-prey interactions within the Chesapeake Bay and contributes to a broader understanding of fish ecology and production patterns. The results from this dissertation provides a better understanding of food web structure and aids in the development EBFM strategies towards the sustainable use of marine living resources.

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25

Monsch, Kenneth Anthony. "The phylogeny of the Scombroid fishes". Thesis, University of Bristol, 2000. http://hdl.handle.net/1983/0dd04e81-6094-4b77-973f-fe4e1f964f2c.

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26

Heath, Daniel D. "An experimental and theoretical investigation of stunting in freshwater fish /". Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65985.

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27

Dygert, Peter H. "Management implications of variability in reproduction and growth of commerical [sic] marine fishes /". Thesis, Connect to this title online; UW restricted, 1986. http://hdl.handle.net/1773/5380.

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28

Gerber, Jerald Michael. "Fish use of artificial reefs in the Central Basin of Lake Erie /". Connect to resource, 1987. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1261052510.

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29

Ozburn, Nicholas R. "Influence of dams on stream fish biodiversity across a diverse Georgia landscape". Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/OZBURN_NICHOLAS_54.pdf.

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30

Muhling, Barbara A. "Larval fish assemblages in coastal, shelf and offshore waters of South-Western Australia /". Access via Murdoch University Digital Theses Project, 2006. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061129.110448.

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31

Kennedy, Thomas Brian. "Aquatic community organization in a diverse floodplain river fish fauna of the southeastern United States". Thesis, [Tuscaloosa, Ala. : University of Alabama Libraries], 2009. http://purl.lib.ua.edu/37.

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32

Zamzow, Jill P. "The physiological ecology of UV-absorbing compounds from the mucus of marine fishes". Thesis, University of Hawaii at Manoa, 2003. http://proquest.umi.com/pqdweb?index=0&did=764803761&SrchMode=1&sid=2&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1233342067&clientId=23440.

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33

Savino, Jacqueline Frost. "Behavioral interactions between piscivorous fish and their prey as mediated by body form and plant abundance /". The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487260859496303.

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34

Chau, Tak-han Gloria y 周德嫻. "Fishes feeding fishes: the composition, size and volume of wild fish feed used in Hong Kong's maricultureindustry". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B27777649.

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35

O'Sullivan, Martha. "Population structure of demersal fish species in the north eastern Atlantic". Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources. Restricted: no access until Dec. 31, 2010. Online version available for University members only until June 2, 2011, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=26063.

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36

Andrew, Tim. "The fishes of Tristan Da Cunha and Gough Island (South Atlantic), and the effects of environmental seasonality on the biology of selected species". Thesis, Rhodes University, 1993. http://hdl.handle.net/10962/d1005128.

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This study focuses on the taxonomy, biogeography and biological aspects of the fishes of Tristan da Cunha and Gough Island in the cental South Atlantic Ocean. Oceanographic measurements were undertaken to determine the position and nature of the Subtropical Convergence (STC) in the vicinity of the islands. The Tristan da Cunha group is thought to be situated on the northern edge of the STC while Gough Island is situated on the southern edge of the front. The seasonal environmental cycle at the islands is characterised by an annual sea surface temperature fluctuation of approximately 5 °C and an annual change in stratification of the water column. It is suggested that this increase in stratification at the STC, brought about in the summer by insolation warming the surface layers of the ocean, enhances primary production. The STC is identified as a unique habitat for fishes and as an important barrier to dispersal of species in the Southern Ocean. The present study has produced 18 new distributional records from the shelf waters of Tristan da Cunha and Gough Island. The fish fauna known from the shelf waters of these islands is reviewed, and a diagnosis, synonymy, and in some cases an illustration are provided. For certain species, brief notes on their biology, relative abundance and seasonal distribution are included. An analysis of the ichthyofaunal relationships between shallow water areas in the vicinity of the STC has resulted in the identification of a characteristic neritic STC ichthyofauna. The circumglobal distribution of many of these species is thought to be a consequence of a dispersive pelagic phase in their life-cycles. Biological processes in fishes at these islands are temporally and spatially affected by seasonal changes in oceanographic conditions. Seasonal sea temperature variation was identified as being an indicator of other oceanographic phenomena that may affect processes such as growth, reproduction and feeding in fishes at the islands. Most species have a summer spawning season and growth rate increased during the summer months. It was hypothesised that enhanced primary production and a related increase in food quality and availability during the summer were the major factors temporally regulating the growth and reproduction of fishes at the islands. Twenty families of neritic fishes have been recorded in the shelf waters of Tristan da Cunha and Gough Island. Most families are represented by only one species. Because of this a wide range of life-history strategies are apparent in the fauna. Nevertheless, there are a number of common life-history characteristics shared by most of the neritic species. Firstly, the early lifehistory of many species included an extended pelagic phase which might have facilitated colonisation throughout the STC zone in the past, thereby regulating extant species diversity in this region. Secondly, the common occurrence of an extended summer breeding season and iteroparity suggested that these characters also contributed to survival in what is considered to be an unpredictable environment. It would appear that these common characteristics hold the key to the success of many fishes in the STC zone. This study has contributed to our understanding of oceanic island ecosystems and has revealed distributional patterns of fishes that were unknown previously. By focusing on the biological processes of selected species the regulatory role played by local environmental conditions became apparent. The results of this study are also relevant to proposed conservation measures for Tristan da Cunha and Gough Island.

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37

Furnell, Donald James. "The effect of feeding frequency on the respiratory metabolism of sablefish (Anoplopoma fimbria)". Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27302.

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The three components of the aerobic respiratory metabolism of sablefish, digestion (SDA), activity, and standard metabolism, were examined separately and together as dependent variables responding to the independent variable, feeding frequency. All fish were similar in size and held within a temperature range of 8.5 - 9.5 C on a 12 hr photoperiod. Fish were studied in both 4000 L mass respirometers equipped with activity meters and in a tunnel respirometer. Identical meals were given every 4, 7, and 14 days. A fourth series of starved fish served as controls. In the mass respirometers, oxygen consumption, ammonia nitrogen excretion, and activity were monitored continuously before, during, and after acclimation to the different feeding frequencies. This permitted estimation of total metabolism, the activity and feeding components of total metabolism, standard metabolism, and protein and lipid catabolism. In the tunnel respirometer, energy expenditures at similar levels of Imposed activity were compared before and after eating to examine repartitioning of locomotor and feeding metabolism. It was found that swimming energy expenditures and standard metabolism are a sigmoid functions of ration frequency. The lowest metabolic rates are associated with the least frequent feedings and the greatest with the most frequent meals. Consequently, total and routine metabolic rates are also direct functions of ration history. The lowest metabolic rates are based on lipid oxidation as an energy source. The fish primarily oxidize proteins to meet metabolic needs when on higher rations. It is also shown that apparent specific dynamic action (SDA) results to a greater extent from catabolic rather than anabolic processes. When the dual metabolic load of locomotion and digestion threatens to exceed the aerobic metabolic scope of the fish, a physiological mechanism exists whereby oxygen supply is preferentially shunted to locomotor requirements. When spontaneously active in the mass respirometers, the activity component of metabolism is generally less than 25% of the standard metabolic rate and digestion and locomotion can proceed synchronously. When swimming spontaneously, the sablefish move at a single, probably optimal velocity regardless of ration history. The better fed fish in the experiments were active most of the day despite the low contribution of the activity component to the routine metabolic rate. These results have significance regarding assumptions often made in bioenergetic models, specifically that activity energy expenditures and standard metabolic rates are independent of ration. They reveal an adaptable physiology which applies different energy partitioning strategies to meet the changing metabolic needs of fish in a dynamic environment with a variable food supply.
Science, Faculty of
Zoology, Department of
Graduate

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38

Strydom, Nadine Amelia. "Dynamics of early stage fishes associated with selected warm temperate estuaries in South Africa". Thesis, Connect to this title online, 2002. http://eprints.ru.ac.za/25/.

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39

Skov, Peter Vilhelm. "Phylogeny, morphology and physiology of the secondary vascular system in fishes /". [St. Lucia, Qld.], 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17799.pdf.

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40

Magnoni, Leonardo J. "Antarctic Notothenioid Fishes Do Not Display Metabolic Cold Adaptation in Hepatic Gluconeogenesis". Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/MagnoniLJ2002.pdf.

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41

Haughey, Joanne Lee. "Culverts as potential barriers to fish movement". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 65 p, 2007. http://proquest.umi.com/pqdweb?did=1251899181&sid=1&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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42

Evans, F. J. (Fiona Jocelyn). "Taxonomy, palaeoecology and palaeobiogeography of some palaeozoic fish of Southern Gondwana". Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/50460.

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Thesis (PhD)--University of Stellenbosch, 2005.
ENGLISH ABSTRACT: The fossiliferous Waaipoort Formation (Witteberg Group, Cape Supergroup), Ganikobis Formation (Dwyka Group, Karoo Supergroup) and Whitehill Formation (Ecca Group, Karoo Supergroup) span a protracted period interrupted by a +-45Ma glacial event. This Late Carboniferous glacial event resulted in a prolonged hiatus in sedimentation as well as significant erosion in many southern continents of Gondwana. This study demonstrates how the glacial episode affected faunal composition and changes in palaeoecology in southern Gondwana across this time period. The Waaipoort shows the highest overall faunal diversity with relatively high palaeoniscoid diversity within Ganikobis and Whitehill Formations. This study is unique in correlating Early Carboniferous - Early Permian fish fauna of South Africa and Namibia specifically, as well as other parts of southern Gondwana, and includes maps of possible fish migration routes. This study attempts to refine the body of disjointed knowledge on the taxonomy and distribution of the fish fauna surrounding this period in southern Gondwana. Three new Waaipoort taxa are recognised, and several reassigned. Earlier work on Late Carboniferous fish from Southern Africa has been updated herein to incorporate recent collections. This has allowed the recognition of up to 15 new palaeonoscoid taxa, some of which are endemic to this region. Several new taxa are recognised within the Whitehill Formation fish fauna and a new lectotype for Palaeoniscum. capensis is presented. Detailed taphonomic and sedimentological studies (with 6 lithologs) of fossil localities visited in this broad-based study verify the correlation, and impart information often lost or ignored in pure palaeontological studies on the palaeoecology or palaeoenvironment of the fauna. Systematic relationships discussed here also serve to strengthen the palaeobiogeographical correlations between the Gondwanan continents.
AFRIKAANSE OPSOMMING: Die fossie1draende Waaipoort Formasie (Witteberg Groep, Kaap Supergroep), Ganikobis Formasie (Dwyka Groep, Karoo Supergroep) en Whitehill Formasie (Ecca Groep, Karoo Supergroep) strek oor 'n uitgebreide tydvak wat 'n periode van vergletsering van ongeveer 45 miljoen jaar insluit. Hierdie Laat Karboon ystyd het sedimentasieprosesse lank onderbreek en beduidende erosie in baie van die suidelike kontinente van Gondwana veroorsaak. Die huidige studie toon hoe die vergletsering die faunistiese samestelling en veranderings in die paleo-ekologie van suidelike Gondwana beinvloed het. In totaal toon die Waaipoort die grootste faunistiese diversiteit, terwyl 'n relatief hoe diversiteit ook onder die Palaeoniscoidei van die Ganikobis en Whitehill Formasies voorkom. Hierdie studie is uniek insoverre dit spesifiek data oor die Vroee Karboon - Vroee Perm visfauna van Suid-Afrika en Namibie, asook ander gebiede van suidelike Gondwana korrelleer en kaarte van moontlike migrasieroetes insluit. Die navorsing poog om die groot hoeveelheid losstaande inligting oor die taksonomie en verspreiding van die visfauna in suidelike Gondwana te verwerk en te verfyn. Drie nuwe taksa is uit die Waaipoort geidentifiseer en 'n verdere aantal is geherklassifiseer. Vroeer navorsing oor die Laat Karboon-visse van Suider-Afrika is bygewerk in die lig van resente versamelings. Dit het die herkenning van tot 15 nuwe taksa onder die Palaeoniscoidei, waarvan sommige endemies aan hierdie streek is, moontlik gemaak. 'n Aantal nuwe taksa word onder die visfauna van die Whitehill Formasie aangeteken, saam met 'n nuwe lektotipe van Palaeoniscum capensis. Gedetailleerde tafonomiese en sedimentologiese analises van die vindplekke wat tydens hierdie studie ondersoek is en wat 6 vertikale profiele insluit, ondersteun hierdie korrelasie. Sodoende stel dit inligting beskikbaar wat dikwels gedurende suiwer paleontologiese studies oor die paleo-ekologie of paleo-omgewing van die fauna verlore sou gaan of geignoreer sou word. Die sistematiese verwantskappe wat hier bespreek word dien ook om die paleobiogeografiese ooreenkomste tussen die Gondwana-kontinente te versterk.

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43

Means, Sheila Marie. "Patterns and processes of brain diversification within esociform teleosts". Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/941371.

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The richness of nervous systems represented by extant fishes has not yet been determined; the brain morphology of many species, indeed, many groups, remain undescribed. For this reason we have examined esociform teleosts and focused on three goals: 1) to provide the first basic descriptions of the brains of two esociform teleosts, Esox masquinongy (muskellunge) and Esox lucius (northern pike); 2) to describe the development of E. masquinongy brains; and 3) to compare the neuronal features between E. masquinongy and E. lucius in light of the ontogenic pattern of E. masquinongy. We demonstrate that a suite of differences exists between the brains of these two congeners. Relative to the brains of E. lucius, the brains of E. masquinongy exhibit a number of paedomorphic features. This heterochronic shift parallels the differences in non-neuralmorphological features previously described between these two species. We identify three features that cannot be explained by this heterochronic shift: 1) the optic nerves of E. masquinongy and E. lucius cross oppositely, E. masquinongy have optic nerves that cross left nerve dorsal, E. lucius cross right nerve dorsal; 2) Esox lucius have a consistent cellular discontinuity in the telencephalon between Dm, and Dd that is not present in E. masquinongy; and 3) adult E. lucius retain a neural canal opening that closes in larval E. masquinongy, a peramorphic exception to the paedomorphic pattern.
Department of Physiology and Health Science

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44

Li, Raymond Y. "The influence of environmental factors on spatial and temporal variation of fish assemblages in the lower Brazos River, Texas". College Station, TX : Texas Water Resources Institute, 2003. http://worldcat.org/oclc/401398916/viewonline.

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45

Orrell, Thomas M. "A molecular phylogeny of the Sparidae (Perciformes: Percoidei)". W&M ScholarWorks, 2000. http://web.vims.edu/library/Theses/Orrell2000.pdf.

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46

Kaunda, Emmanuel Kamlipe Watson Hawkins. "Feeding ecology of Bathyclarias nyasensis (Siluroidei: Claridae) from Lake Malawi". Thesis, Rhodes University, 2001. http://hdl.handle.net/10962/d1005126.

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In Malawi, fish contribute about 60-80% to the country's animal protein supply. The greater proportion (> 50%) comes from Lake Malawi. Bathyclarias nyasensis and other clariid catfish contribute up to > 20% of the total catches. Catches of Bathyclarias nyasensis in the inshore area of the south-east arm of Lake Malawi are declining and a management plan for the fishery is essentially lacking. There is paucity of biological data that precludes the use of any option to manage the species. The principal aim of the thesis was to define the ecological role B. nyasensis, the most abundant and common of the Bathyclarias species. By examining life history characteristics within a food web context, it was hypothesized that the study would provide an insight into the interrelationships between species, and, hence form the basis for the development of a rational exploitation strategy for the species. The study was undertaken in the south-east arm of Lake Malawi (9° 30'S, 14° 30'S). The principal objectives of the study were to investigate the feeding ecology of B. nyasensis by examining morphological characters and structures associated with feeding, diet of B. nyasensis, food assimilated in the species using carbon (∂¹³C) isotope analysis, daily food consumption rate for B. nyasensis; and to relate the feeding ecology to life history traits such as age, growth, and some aspects of the reproductive biology of B. nyasensis. The suitability of sectioned pectoral spines and sagittal otoliths to age B. nyasensis was assessed. Due to reabsorption of growth zones with increasing spine lumen diameter with fish size, and the relatively low number of spines that could be aged reliably, only otoliths were used. The maximum age for B. nyasensis was estimated at 14 vears. Growth was best was described by the four parameter Schnute mc: lt ={42+(81¹·⁸ - 42¹·⁸)x1-e⁻°·°⁵⁽t⁻¹⁾}¹/¹·⁸ over 1-e⁻⁽⁻°·°⁵⁾⁽¹¹⁾ for female, lt={41+(98¹·² - 41¹·²)x 1-e⁻°·°²⁽t⁻¹⁾}¹/¹·² over 1-e⁻⁽⁻°·°²⁾⁽¹³⁾ and for male fish. Age-at-50% maturity for females and males were estimated at 7 years and 4 years, respectively. Typically, fish grew rapidly in the first year, but slower during subsequent years. Smaller fish were found inshore while larger fish were found in offshore regions. It was hypothesised that the rapid growth in the first year and slower growth later is a consequence of change in diet from high quality and abundant food source to a more dilute food and that this may be associated with a shift in habitat. Morphological characters associated with feeding were used to predict the food and feeding behaviour of B. nyasensis. The size of premaxillary, vomerine, pharyngeal dental and palatine teeth and premaxillary and vomerine tooth plates suggested the capability of B. nyasensis to handle both large and small prey, with a propensity towards smaller prey in composition to C. gariepinus. The molariform teeth on the vomerine tooth plate suggested that molluscs form part of the diet. The relative gut length (1.27±0.24) suggested omnivory, with an ability to switch between planktivory and piscivory. Buccal cavity volume and filtering area changed with fish size at 500-600 mm TL upon which it was hypothesised that the fish diet changed to planktivory at this size. Detailed diet analysis provided information upon which the above hypotheses could be accepted. Percent Index of Relative Importance (%IRI) and a multi-way contingency table analysis based on log-linear models were used to analyse diet data. Results showed that B. nyasensis is omnivorous, but with a distinct ontogenetic dietary shift from piscivory to zooplanktivory at 500 - 600 mm TL. The increased buccal cavity volume at the same fish size therefore, suggests that B. nyasensis is well adapted to filter the dilute zooplankton resource. Increased foraging costs of feeding on zooplankton explained the slower growth of larger fish. The dietary shift was finally corroborated by results of the ∂¹³C isotope analysis. A polynomial equation described the change in carbon ratios with fish size: ∂¹³C = - 33.188 + 0.4997L - 0.0045 (total length)² (r² = 0.598, n = 12, p=0.022). The ontogenetic shift in diet was synchronised with a habitat shift postulated in life history studies. In the inshore region, B. nyasensis were predominantly piscivorous (apex predators), and were zooplanktivorous in the offshore region, thereby forming part of the pelagic food web in the latter region. After examining "bottom-up" and trophic cascade theories, it was postulated that perturbations of the B. nyasensis stock would be discernible both at the top and lower trophic levels. As a piscivore and therefore apex predator, effects of overfishing B. nyasensis in the inshore region could cascade to unpredictable ecological changes in inshore areas and, due to the ontogenetic habitat shift, in the offshore regions. Examples of trophic cascade phenomena are provided. On the basis of the feeding study, it was possible to reconstruct the pelagic food web of Lake Malawi. Apart from the lakefly Chaoborus edulis, B. nyasensis is the other predator that preys heavily on zooplankton in the pelagic zone. Perturbations of the B. nyasensis stock could affect size composition of zooplankton which in tum, could affect production of C. edulis, a resource for the top predators in the food web. The findings of the present study contributed to the ongoing debate of introducing a zooplanktivore into the pelagic zone of Lake Malawi. Proponents for the introductions have argued that zooplankton predation by fish is inferior to that of C. edulis. Introduction of a clupeid zooplankton was proposed as a strategy to boost fish production in the lake. The zooplanktivore would either out-compete or prey on C. edulis to extinction. Opponents to this view argued that zooplankton biomass in the pelagic region was too low to support introductions and that the fish biomass in the pelagic region may have been underestimated. Results from the present study suggest that planktivorous fish (including B. nyasensis) might not be inferior to C. edulis in utilising the zooplankton resource; B. nyasensis is well adapted to utilise the dilute zooplankton resource, and by omitting B. nyasensis from previous studies, overall zooplankton predation by fish may have been underestimated by between 7 - 33%. On the basis of the theoretical migratory life history cycle of B. nyasensis, it is recommended that the current interest in increasing fishing effort in offshore areas should proceed with caution. Ecological changes that may have occurred in the inshore areas due to overfishing have probably not been noticed: as the offshore zone has never been fished. The latter zone may have acted as a stock refuge area. Higher fishing intensity in the offshore areas could lead to serious ecological imbalances and instability. The study has shown that life history characteristics studied in the context of the food web, and in the absence of other fisheries information and/or data, strongly advocates the precautionary principle to managing changes in exploitation patterns.

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47

Das, Nitya Nanda. "Factors affecting timing and size of runs of hilsa shad (Hilsa ilisha) in Bangladesh and Pakistan". Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24624.

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Data were gathered in 1983 and 1984 on the Hilsa fishery in the Meghna River in Bangladesh, and on factors related to its seasonal variation, including effort as estimated by weekly counts of fishing boats, and landings as estimated by counts of fish offloaded at Chandpur. Historical data were also analyzed concerning factors influencing annual variations in Hilsa landings from the Padma River of the Ganges (1967-1974) and from the Indus River of Pakistan (1968-1982). Rail shipments were good indicators of landings. No significant relationship was observed between riverine Hilsa landings and fishing intensity. Rainfall, mean water level and maximum air temperature had no obvious influence on annual variations in seasonal timing of Hilsa runs in the Padma river of the Ganges. Rainfall two years earlier had a significant negative relationship with annual variation of Hilsa landings, in both the Padma River and in the Indus River. Mechanisms regulating this negative association between landings and rainfall may be that Hilsa are 1+ year old when they are first recruited to the fishery, and the survival of eggs and fry is minimum in years when there is a very high rainfall. In the Ganges and Indus rivers, annual landings were not closely correlated, and appear to be dependent in part on earlier rainfall conditions within each region. This dependency offers a means of rough forecast of annual harvest on the basis of previous rainfall data.
Science, Faculty of
Zoology, Department of
Graduate

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48

Hegrenes, Scott Grayson Juliano Steven A. "Diet-induced phenotypic plasticity of feeding morphology in the genus Lepomis". Normal, Ill. Illinois State University, 1999. http://wwwlib.umi.com/cr/ilstu/fullcit?p9942644.

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Thesis (Ph. D.)--Illinois State University, 1999.
Title from title page screen, viewed July 24, 2006. Dissertation Committee: Steven A. Juliano (chair), Wayne A. Riddle, Scott K. Sakaluk, Charles F. Thompson, Douglas W. Whitman. Includes bibliographical references (leaves 126-133) and abstract. Also available in print.

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49

Aaby, Alyssa Anne. "Testing the ArcGIS Marine Data Model : using spatial information to examine habitat utilization patterns of reef fish along the west coast of Hawaii /". Connect to this title online, 2004. http://hdl.handle.net/1957/4061.

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50

Laberge, MacDonald Tammy. "Molecular Aspects of Nitrogen Metabolism in Fishes". Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_dissertations/668.

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Molecular aspects of nitrogen metabolism in vertebrates is an interesting area of physiology and evolution to explore due to the different ways in which animals excrete nitrogenous waste as they transition from an aquatic to a terrestrial lifestyle. Two main products of nitrogen metabolism in fishes are ammonia and urea. Ammonia is produced during protein catabolism and build up of ammonia is toxic. Some aquatic vertebrates convert ammonia into a less toxic compound urea via de novo synthesis through the ornithine-urea cycle (O-UC). Five enzymes are involved in the O-UC: carbamoyl phosphate synthetase (CPS), ornithine carbamoyl transferase (OCT), argininosuccinate synthetase (ASS), argininosuccinate lyase (ASL), and arginase (ARG). An accessory enzyme, glutamine synthetase (GS) also participates in the "fish-type" O-UC. Teleosts excrete ammonia passively over their gills into the aquatic environment. The teleost, Opsanus beta, has been shown to increase urea production after 48 hours of crowding. This thesis explored how crowding stress affected nitrogen metabolite levels of ammonia and urea and O-UC gene expression and enzyme activity in O. beta. Lungfishes while in an aquatic environment avoid ammonia toxicity by releasing excess ammonia across their gills, but when stranded on land they produce urea through the O-UC. Urea production via the O-UC has a metabolic cost of at least four ATP molecules. This thesis explored the response of a lungfish, Protopterus annectens, to six days of aerial exposure and re-immersion conditions by measuring concentrations of O-UC mRNA expression and enzyme activity and nitrogen metabolites ammonia and urea. CPS acts as the entry point to the O-UC and based on enzymatic studies, most aquatic vertebrates utilize one isoform of this enzyme (CPSIII) while terrestrial vertebrates utilize a different isoform of this enzyme (CPSI). Lungfishes are a particularly interesting group of air-breathing fishes, not only because of their link to the origins of tetrapods, but also because CPS I may have originated within this group. Both CPS III and CPS I have been enzymatically described within this group. This thesis uses phylogenetics to investigate how CPS nucleotide sequences in lungfishes evolved compared to other vertebrates.

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