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Capstone Projects

Rooted Education: learning from aquaponics

Sat, 04/30/2016 - 15:02
Abstract: Aquaponics is the integration of soil-less agriculture (hydroponics) within closed-loop aquaculture systems to reduce the toxic accumulation of nutrient waste from aquatic animals. Bacteria naturally establish to purify water by oxidizing the ammonia secreted by fish, which reduces the toxicity of effluent while creating a usable nitrogen source for plants. The conversion of ammonia and nitrite into nitrate by living bacteria communities is called a biological filter, or biofiltration (FAO 2014). Aquaponics would not be possible without biofiltration; the slightest amount of ammonia would be fatally toxic to fish, and plants wouldn't receive the nitrates they need to grow. There are unique opportunities offered by an aquaponics system to learn about ecological and human communities. 1.1. Aquaponics enables users to grow fish and agricultural plants with limited space and resource use (water, soil, and time). This enables an aquaponics user to invest less physical energy and time into expanding sustainable food resources for their household use. 1.2. A small aquaponics system could promote cultural values of self-sufficiency, energy consciousness, and connection to food systems. It could inspire individual efforts to produce food for one’s household, to build healthier and more resilient systems, and a greater appreciation for farming. Therefore, this project aims to actualize a mobile and functional aquaponics system for the educational benefit of the Paul Smith's College community. I will provide the background knowledge needed to maintain an aquaponics system, as well as describe the general concept of aquaponics design.
Access: No
Literary Rights: On
Major: Environmental Sciences, Natural Resources Sustainability Studies
Year: 2016
File Attachments: The Author has selected not to publish this complete work.
Authors: Brian Jason Kohan

A Meta-Analysis of the Impacts of Professional Bass Fishing Tournaments

Mon, 04/29/2013 - 19:28
Abstract: Professional black bass (Micropterous spp.) fishing tournaments have significant economic benefits associated with them; however concerns about various negative ecological effects are being raised. Fish mortality has the potential to be critically high following release of the fish, whether it be from stress, hooking injuries, heat exposure, disease, or a lack of sufficient oxygen. Mortality can occur prior to release, or it can occur several days to even weeks after release. The vast majority of organized tournaments release all of the fish in one specific location once the weigh-in process has been completed. The lack of dispersal among bass once they are released back into the water is another key issue. Utilizing 17 different studies on mortality and 8 studies on dispersal, this meta-analysis study looks at how tournaments can affect the bass population in lakes and rivers across the country. It also examines the variables that affect mortality and dispersal such as season, water temperature, location, and species of bass. The potential ways for the survival rate to be improved is also discussed. The results of the meta-analysis showed that water temperature had a significant impact on mortality, as did the time of year the tournaments were held. Mortality was highest from a period of 1-10 days following the tournaments, but was still occurring up to one month after. Dispersal was highest for Largemouth Bass, and for Spring-held tournaments. The study concludes that there are several ways to potentially lower the tournament associated mortality rate for black bass.
Access: No
Literary Rights: Off
Major: Natural Resources Management and Policy
Year: 2013
File Attachments: The Author has selected not to publish this complete work.
Authors: Brett Leidner