Thesis (Ph. D.)--University of Washington, 2003. / Vita. Includes bibliographical references (leaves 98-111).

Oregon’s fish hatchery system developed in the late 1800’s in response to salmon fishery losses. Salmon hatcheries consist of a number of built components. ‘Growing fish’ requires a variety of building types which support the hatchery process as well as constant input of resources. In addition to surveying and inventorying fish hatchery resources, this study will analyze the social, economic, cultural, and environmental conditions under which these fish hatcheries were organized and commissioned. Ultimately, this survey will not only serve as a baseline for future, more intensive-level surveys, but will also provide a foundation for a National Register Multiple Property Submission. The use of hatcheries to sustain native Oregon fish species constitutes a major aspect of Oregon’s fishing and environmental conservation efforts. Oregon’s heritage hatcheries stand as physical reminders of early conservation activity and while their preservation provides a more complete picture of Oregon’s relationship with natural resources

Scar: A lingering sign of damage or injury, either mental or physical. Technological advancement scars the landscape. It has been our practice to ignore, or worse, hide these marks that have been made as society continues to advance. Industries past left us relics and ruins of bygone eras of promise and production. The time we live in has recognized the untenable failures of past generations, however there are methods of industry that continue to injure the landscape. We will leave our scars. In this time we must rethink the scar, define it, and recognize its beauty. The first step of reclamation is acquiring awareness of where the scar came from. Whether it is an injury, an accident, or a natural disaster, some traumatic event caused lasting damage. Traumatic events whether natural - hurricanes, floods and earthquakes - or manmade - wars, genocide and assaults - can cause both physical and emotional scars. Human tissues can repair themselves leaving scars, but there are also the scars of repair. Even technological advancements in medicine cannot eliminate the scar. Scarring is the natural healing process, yet we view them as unnatural. Once recognized, we must accept the scar so that we do not destroy it. We must accept the traumatic cause/effect relationships, and be conscious of the healing process. The scar must be appreciated: the time that it takes to make it, the time that it takes to heal, the history it can teach, and the story that it can tell. To hide it would only be an injustice to those who came before us and to those yet to come. With acceptance a scar’s beauty can be seen. Every new era of technology, every successive generation, leaves a scar. The opportunity to aid the greatest healer – time – is now. Every scar tells a story. Reclamation: A restoration, as to productivity, usefulness, or morality.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 59-61). Also available via the Internet.

This problem was undertaken to determine a suitable combination of fertilizers that would increase the food in a lake, resulting in increased yield of bass and crappie.

Amphibians and aquatic invertebrates have complex life histories that link aquatic and terrestrial food webs. It has been suggested that amphibian reproduction is an important source of carbon to some aquatic systems. This process of energy flow may be shaped by shifts in habitat selection in response to predators. We hypothesized that predators decrease colonization and oviposition of prey, reducing active inputs. Thus predation risk is expected to shift the relative amounts of active and passive subsidies. We manipulated the presence of fish predators in aquatic mesocosms. Results suggest hylid treefrog eggs and hydrophilid beetles were less abundant in predator treatments. This difference in oviposition and colonization translated into small reductions in calories and ash free dry mass of active inputs. However, passive allochthonous inputs were more than double active amounts and variable, therefore relative amounts of active and passive inputs did not differ across the levels of predation risk.

Central parts of the Šumava national park has specific nature conditions which we must respect when fish farming is carry out . In 1998 fish {--} hatchery near Borová Lada was established. The fish hatchery exists more than 10 years and we still have no professional report about exploitation this object. (using assorted technologies of rearing, rearing under controlled conditions). The aim of this graduation thesis is evaluation results of trout culture and make proposition new improved technologic process in fish farming on this site. The thesis also includes experiments with initial feeding of fry of brown trout (Salmo trutta morpha fario) carryed out during the spring 2008. The main observed values were survivance, specific growth rate (SGR) and feed conversion ratio (FCR). After 17 weeks of initial feeding fry of brown trout the observed values were achieved: survival of fish 38,2 % , average length SL = 69,0 mm, average weight 4,9 g. Experiments showed that initial feeding of fry of brown trout (Salmo trutta morpha fario) with using feeding mixtures in the Borová Lada fish {--} hatchery is possible and effective.

In addition to a loss of potential revenues from Utah's $393 million sport fishing industry, the state expends millions of dollars every year on costs associated with whirling disease mitigation and prevention. A state fish hatchery at Midway, Utah was closed when the shallow unconfined aquifer being used for fish culture by spring discharge was deemed to be contaminated by whirling disease. An alternative water source may exist in a confined aquifer below this contaminated unconfined aquifer. However, the complex hydrostratigraphy presents a challenge in determining if this source is a viable resource for fish culture. Geological, physical, chemical, geophysical, and isotopic data were combined to create a conceptual model of the groundwater flow at the site and to determine the interactions this confined aquifer may have with the contaminated aquifer. This model divides groundwater at the hatchery into a shallow unconfined system, an upper confined system, and a lower confined system. The shallow unconfined system is characterized by a water table ~1m below ground surface, several active springs, fast travel times, modern water mixed with ancient hydrothermal water, relatively high TDS, and relatively enriched isotopic values. The confined aquifers have a smaller hydrothermal component, relatively depleted isotopic values, lower TDS, and modern recharge components. Two orthogonal shallow high-resolution seismic reflection profiles indicate substantial heterogeneity in the subsurface at the level of the confined systems at the hatchery. Several north-south trending normal discontinuities were interpreted as possible faults from the seismic profile oriented as a dip line, whereas the strike profile shows discontinuous layering without noticeable faulting. A well log profile for the site shows discontinuous tufa layers amid heterogeneous alluvium material. These tufa layers separate upward leaking confined aquifers from the unconfined system. It is only through the integration of several methods that such mixed systems, can be understood. In this study, the lower confined aquifer was found to be a sufficient and safe resource through the integration of numerous methods.