Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 49 for “"fish production"”.
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Addressing the land loss-fish production paradox
… I first examined the differences between fishery independent and fishery dependent data as indices of relative abundance. Previous studies used landings data to evaluate the importance of marsh habitat (e.g. distance of marsh edge and area of intertidal marsh) to fisheries production, but …
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A study of the fish production of a natural farm pond
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Zoology, 1944
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A computer simulation model for wastewater management in an integrated (fish production-hydroponics) system
Intensive fish production in a recirculating aquaculture system facility is a complex bioengineering operation involving a sensitive balance among physiological, water quality, and management components of the overall system. Warm and nutrient-rich wastewater discharged from controlled-environment …
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Variations in Community Fish Production and Diversity Across the Appalachians: Implications for Climate Change
… conservation. During summer 2012, I quantified fish biomass, somatic growth, secondary production, and habitat data for fish communities in 25 Appalachian streams from Vermont to North Carolina. Multiple statistical tests were conducted to determine the relationship between community fish …
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Modeling thermal environment of a recirculating aquaculture system facility
Economic viability of fish production in recirculating aquaculture system (RAS) facility depends on minimizing the energy requirements of operating such facilities. The fish growth and water quality aspects of RAS have been studied in considerable details. However, the understanding of the thermal …
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The welfare value of inland small-scale floodplain fisheries of the Zambezi River Basin
The study assessed the welfare value of fisheries in reducing income poverty and economic vulnerability in the Kafue and the Lower Shire floodplains under the hypothesis that inland small-scale floodplain fisheries significantly reduce poverty and vulnerability in fishing households. The welfare …
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Exploring Fish Diversity as a Determinant of Ecosystem Properties in Aquatic Food Webs
… the effect of common carp across a gradient of fish richness in mesocosms. The invader reduced native fish production and the effect was reduced with increasing fish richness. The invertebrate community was modified by a top-down effect from the richness treatment, whereas the invader had a …
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Habitat evaluation and production of rock bass in two Virginia streams
… of Habitat Suitability Index (HSI) models for fisheries impact assessment has not been field validated for most fish species. This research sought to test several of the fundamental assumptions inherent in applications of Suitability Index (SI) curves with the Habitat Evaluation Procedures …
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Benthic invertebrate management in plastic-lined fish culture ponds
… ponds in place of earthen ponds for fish culture is becoming common among agencies; however limited information is available on their management. Since plastic lining significantly reduces the amount of organic sediment typically found on the bottom of culture ponds there is also a …
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Development of a hazard monitoring system for aquaculture: case of study - catfish farming
… potential food hazard sources in the catfish farming process. In this case study, the artificial propagation of Heteroclarias catfish hybrids is considered the final product. Considering a fictive small-scale hatching unit, within this research, biological, chemical, and physical food …
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Assessing potential navigation impacts to the Kanawha river ecosystem: a modeling approach
… was integrated to examine the trophic basis of fish production and predict potential impacts of increased tow traffic at two sites in the Winfield Pool. Total standing stock and production of adult fish were estimated as 242 kg/ha and 188 kg/ha/yr, respectively. Sixtyâ one species were …
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Effects of turbidity on the foraging abilities of brook trout (Salvelinus fontinalis) and smallmouth bass (Micropterus dolomieu)
… ramification on the reproductive potential of fish. Although relatively large sediment loads may be necessary to alter stream habitat, only small loads are needed to raise mean stream turbidity levels. Turbidity may be an important, yet relatively unexamined factor in stream fish production. …
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EXPLORATION OF ECONOMIC AND ENVIRONMENTALLY BENEFICIAL APPROACH FOR WASTE SHELL FRACTIONATION
In the last decades, the global fish production has grown vigorously. With such tremendous production, huge quantities of wastes are generated annually, especially the shells from crustacean animals. Every year, around 6-8 million tons of crustacean shells are produced globally-about 1.5 million …
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Diet and trophic relationships of fishes from the nearshore of the Bay of Quinte and Kingston Basin, Lake Ontario
… variation in diet and trophic position of fishes within large lakes. Two areas of north-eastern Lake Ontario - the Bay of Quinte and the Kingston Basin – provide contrasts in temperature, nutrients and depth while supporting similar littoral fish communities and therefore provide an …
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Resident Benthic Fishes of Artificial Reefs in the Mississippi Sound: Effects of Habitat Relief and Subregion
… of these manmade structures to promote secondary production. Many researchers have questioned whether artificial reefs increase the production of fish biomass, or simply aggregate existing fish biomass. Most previous research has focused on production of transient fish biomass, because of the high …
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The nutritive ecology of Lac la Plonge and Canoe Lake
… lake productivity. Any study to determine the fish producing capacity of a lake must concern itself with the transfer of organic matter from one state to another in the food chain. The physico-chemical features of a lake are important to the extent that they control the supply of nutrients and …
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Characterisation, Treatment and Utilisation of the Effluent from an Intensive Fish Farm
… information on aspects of water quality in fish farming. The metabolic products produced by intensively farmed rainbow trout have been assessed and the production rates can be used to predict water quality. The water quality requirements of trout have been reviewed and experiments conducted …
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Expectation of Genetic Alteration of Muscle Composition and Growth Traits in Rainbow Trout (Salmo gairdneri)
… and Busch 1973; Olson et. al. 1976). Though fishes are able to convert food to quality protein more efficiently than most animals, they have been underutilized as a protein source in the United States. Until recently, genetic manipulation through selection to enhance their quality has not …
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Technological innovation and resource management in the fisheries of the British Isles, ca. 1400-1900
… the first in-depth study of interactions between fishermen, fisheries managers and fishery resources in British waters before the industrial age. In particular, it investigates those interactions during periods of technological innovation and intensified fishing activity in the period between 1400 …
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Aquaculture development in the Philippines
… sector of the economy. Tremendous progress in production and technology has been achieved during the past decade. However, the country is experiencing a fish production shortfall which the aquaculture sector is expected to address. Given the proper support and direction, the aquaculture …
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