Relevant bibliographies by topics / Environmental Sciences|Engineering, Environmental|Agriculture, Fisheries and Aquaculture

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Environmental Sciences|Engineering, Environmental|Agriculture, Fisheries and Aquaculture'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Environmental Sciences|Engineering, Environmental|Agriculture, Fisheries and Aquaculture"

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Rachmawatie, Srie Juli, Adib Norma Respati, Nancy Oktyajati, Libria Widiastuti, Endang Siti Rahayu, and Joko Sutrisno. "PENERAPAN INTEGRATED FARMING SYSTEM (IFS) MENUJU DESA AGROWISATA DI DESA JATISARI, KECAMATAN JATISRONO, KABUPATEN WONOGIRI." SPEKTA (Jurnal Pengabdian Kepada Masyarakat : Teknologi dan Aplikasi) 2, no. 1 (June 11, 2021): 33. http://dx.doi.org/10.12928/spekta.v2i1.3295.

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Integrated Farming System is a management system for plants, livestock, and aquaculture with environment to produce an excellent product. The objectives of the community service activity were empowering Jatisari Village community to realize the Agrotourism Village, ensuring integrated farming systems run well and optimally, and making Jatisari Village a fostered village of the Faculty of Engineering, Science and Agriculture UNIBA. Integrated farming system is a system that combines agricultural activities, animal husbandry, fisheries, and forestry with other sciences related to agriculture in one land, so that it is expected to be one of the solutions for increasing land productivity, building programs and environmental conservation, and integrated village development. Entrepreneurship is also important to support the existence of agrotourism of Jatisari Village. Jatisari Village is prospective in developing agrotourism areas. Local potential, natural resources and human resources can be utilized to support the development of agrotourism areas
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Corbin, John S. "Marine Aquaculture: Today's Necessity for Tomorrow's Seafood." Marine Technology Society Journal 41, no. 3 (September 1, 2007): 16–23. http://dx.doi.org/10.4031/002533207787442150.

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Aquaculture is the fastest growing segment of the global food production sector, valued at $70.3 billion in 2004. In recent years, global capture fisheries have leveled off at around 95 mmt per year, with little or no prospect of increasing yields. The United Nations Food and Agricultural Organization (UNFAO) has concluded that increases in future seafood supplies must come from aquatic farming. The United States (U.S.) industry has been among the fastest growing agriculture sectors. Domestic seafood from capture and culture fisheries provides about 20% of annual consumption, the balance coming from imports. Future supply will come from either increasing imports or, preferably, expanding domestic aquaculture and fisheries sources. The greatest opportunity for domestic growth is marine aquaculture, particularly placement of large and small farms in the U.S. Exclusive Economic Zone (EEZ). Additional benefits can accrue if large-scale marine hatchery technology is developed, so that fingerlings can be produced for wild stock enhancement and management. Currently, there is no permitting and leasing regime for ocean farming in the U.S. EEZ. In response to several national commissions, the National Oceanic and Atmospheric Administration (NOAA), U.S. Department of Commerce (USDOC) is spearheading a bold effort to implement long-term marine aquaculture development objectives and create an EEZ permitting and leasing mechanism. Enabling legislation, entitled the National Offshore Aquaculture Act of 2007, is before Congress. Anchoring fish farms in the relatively shallow near shore and the EEZ is an exciting prospect for greater U.S. seafood self-sufficiency. However, there are many institutional, environmental and technical issues to resolve. More compelling is the prospect of developing new marine aquaculture technologies, e.g., single-point moorings, untethered cages, and integrated multi-trophic systems, to sustainably utilize the deep ocean beyond the EEZ. Successfully tackling this looming challenge will need the diverse expertise of the U.S. marine technology industry.
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Wong, M. H., Y. H. Cheung, S. F. Leung, and S. P. Wong. "Reclamation of polluted riverwater for aquaculture: removal of nutrients by microalgae." Water Science and Technology 32, no. 3 (August 1, 1995): 271–80. http://dx.doi.org/10.2166/wst.1995.0149.

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The present experiment was designed to simulate an on-going field trial at Au Tau Substation, Agriculture and Fisheries Department, Hong Kong Government, using a series of fishponds to treat polluted riverwater, as well as for promoting algal growth, before the water was used for rearing freshwater fish. It was revealed that aeration was necessary to lower the level of ammonia. It also accelerated the conversion of ammonia to nitrite, and then nitrite to nitrate. Substantial amounts of metal (K, Mg, Cu, Zn) were also removed from the riverwater, possibly by algal assimilation. The algal products contained a high crude protein content (42% dry weight basis) which could be used to feed carp and tilapia.
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Bostock, John, Brendan McAndrew, Randolph Richards, Kim Jauncey, Trevor Telfer, Kai Lorenzen, David Little, et al. "Aquaculture: global status and trends." Philosophical Transactions of the Royal Society B: Biological Sciences 365, no. 1554 (September 27, 2010): 2897–912. http://dx.doi.org/10.1098/rstb.2010.0170.

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Aquaculture contributed 43 per cent of aquatic animal food for human consumption in 2007 (e.g. fish, crustaceans and molluscs, but excluding mammals, reptiles and aquatic plants) and is expected to grow further to meet the future demand. It is very diverse and, contrary to many perceptions, dominated by shellfish and herbivorous and omnivorous pond fish either entirely or partly utilizing natural productivity. The rapid growth in the production of carnivorous species such as salmon, shrimp and catfish has been driven by globalizing trade and favourable economics of larger scale intensive farming. Most aquaculture systems rely on low/uncosted environmental goods and services, so a critical issue for the future is whether these are brought into company accounts and the consequent effects this would have on production economics. Failing that, increased competition for natural resources will force governments to allocate strategically or leave the market to determine their use depending on activities that can extract the highest value. Further uncertainties include the impact of climate change, future fisheries supplies (for competition and feed supply), practical limits in terms of scale and in the economics of integration and the development and acceptability of new bio-engineering technologies. In the medium term, increased output is likely to require expansion in new environments, further intensification and efficiency gains for more sustainable and cost-effective production. The trend towards enhanced intensive systems with key monocultures remains strong and, at least for the foreseeable future, will be a significant contributor to future supplies. Dependence on external feeds (including fish), water and energy are key issues. Some new species will enter production and policies that support the reduction of resource footprints and improve integration could lead to new developments as well as reversing decline in some more traditional systems.
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Comín, Francisco A. "Management of the Ebro River Basin: Past, Present and Future." Water Science and Technology 40, no. 10 (November 1, 1999): 161–68. http://dx.doi.org/10.2166/wst.1999.0516.

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The Ebro River Basin (85,500 km2 in NE Spain) is characterised by a marked spatial heterogeneity of its geology, topography, climatology and land use. Many reservoirs (138, total water storage capacity of 6,837 hm3) and canals were constructed during this century for agricultural irrigation, electricity production and domestic use. Now, irrigation is allowed in 778,284 ha. There are also 40 aquaculture systems producing 35% of the total Spanish trout production. The mouth of the Ebro River (a 320 km2 delta area) is very productive for agriculture and fisheries. Industrial activities are localised in the upper NW and central parts of the Basin, causing low water quality in the fluvial system. Salinisation of land and river water occurs in the central part, because of salt dissolution, run-off from irrigated fields and groundwater abstraction. Present management is under the responsibility of different administrative agencies. A special agency is responsible for water control and distribution. A new management plan has been recently prepared with the major objective of satisfying the water demands, which are estimated as 7,000 hm3 yr−1 (18,200 hm3 yr−1 is the estimated available water). Most of this comes from agriculture for irrigation (6,310 hm3 yr−1), human use (313 hm3 yr−1) and industrial activities (414 hm3 yr−1). Water is also demanded from other basins. A total water demand of 10,771 hm3 yr−1 has been estimated in the Ebro Basin for the year 2015, maintaining similar proportions as before for the three major uses. In the future, saving and recycling water should be incorporated to the basin management as part of an strategy to distribute water as a function of existing and potential uses in the Basin and for promoting and re-adapting land and water uses to the availability of the resources, including inter-annual climatic fluctuations, and to preserve natural habitats.
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Terech-Majewska, Elżbieta, Joanna Pajdak, Jan Siemionek, and Wojciech Szweda. "Ichtyopathology in Poland: Past, present, future." Medycyna Weterynaryjna 73, no. 6 (2017): 375–82. http://dx.doi.org/10.21521/mw.5699.

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The aim of the study was to present the history of ichtyopathology in Poland and the main achievements of researchers who developed this discipline. The pioneer of ichtyopathological research in Poland was the ichtyologist prof. Teodor Spiczakov, founder of the first Fish Diseases Laboratory at the Jagiellonian University (JU) and initiator of fishery veterinary service. After the Second World War, dr Stanisław F. Śnieszko, a researcher from JU, established a laboratory in the United States, renamed the National Fisheries Center in 1977. In writing about the beginnings of ichthyopathology in Poland, one must also mention prof. Bronisław Kocyłowski, founder and head of the Department of Fish Diseases at PIW in Puławy and lecturer at the Warsaw University of Life Sciences (WULS) and Maria Curie Skłodowska University in Lublin. Prof. Eugeniusz Grabda also contributed to the development of ichtyopathology. He headed the Inland Fisheries Institute (IFI), Fish Disease Laboratory and the Department of Ichthyology with the Department of Fish Diseases at the Fishery Department of the Academy of Agriculture and Technology (AAT) in Olsztyn and co-founded the Department of Marine Fisheries at the Agricultural Academy and the Department of Fish Diseases in Szczecin. In Żabieniec near Warsaw, IFI established a new Ichtiohygiene Division, renamed the Division of Pathology and Fish Immunology, formerly headed by prof. Maria Studnicka and now by prof. Andrzej K. Siwicki. Veterinary inspection in Poland is conducted by the Fish Diseases Laboratory at ZHW under the substantive supervision of the National Veterinary Research Institute & National Reference Laboratories at Fish Diseases Unit in Puławy, headed by prof. Jerzy Antychowicz. Currently the Unit is the National Reference Laboratory for the diagnostics of diseases of aquaculture animals, run by prof. Michal Reichert. Prof. J. Antychowicz and dr. Jan Żelazny taught for many years at the Faculty of Veterinary Medicine at the WULS in Warsaw and at AAT in Olsztyn. The Polish Academy of Sciences has a Department of Ichtiopatology and Fishery Management in Gołysz, headed by prof. Andrzej Pilarczyk, who studies the biological basis of fish farming. “Fish diseases” is a mandatory subject at faculties of veterinary medicine in Poland, and every graduate of veterinary medicine possesses a basic knowledge in this field. The Division of Fish Diseases and Biology in Lublin has been operating since 1963 and for many years was headed by prof. Maria Prost, an authority on the parasitology of fish. The current head of the Division is prof. Antonina Sopińska. The Division of Hygiene Veterinary Laboratory and Fish Diseases Laboratory (later Division of Ichtyopathology) at the Faculty of Veterinary Medicine, Wrocław University af Environmental and Life Sciences were previously headed by prof. Zbigniew Jara, and now by dr Wiktor Niemczuk. At the University of Warmia and Mazury in Olsztyn, prof. Andrzej K. Siwicki and dr Elżbieta Terech-Majewska run the Fish Disease Laboratory and Veterinary Laboratory for Diagnostics of Fish, Amphibians and Reptiles, carry out scientific research, teach and cooperate with fish farmers.
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Wang, Yan, Chen Wang, Ruilian Zhang, and Junzhuo Xu. "Trade-Off Between Aquaculture Closures and Fishermen Livelihoods." SAGE Open 11, no. 2 (April 2021): 215824402110081. http://dx.doi.org/10.1177/21582440211008154.

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The prohibition of aquaculture is an important policy instrument for water quality protection. However, there are lack of observations on the complex interactions between stakeholders in the limiting or closing of fisheries and the internal cooperative mechanism that balances the restoration of water bodies and the livelihoods of fishermen. Using evolutionary game theory and modeling, this article analyzes the complex mutual feedback strategy between local government and the affected fishermen in regard to water body restoration and livelihood security under fishing prohibition. The results show that (a) the performance evaluation mechanism of environmental protection, including rewards and punishments, can provide direct political traction and indirect material guarantees for local governments to perform their duties and allow water body restoration and the transition of fishermen to alternative livelihoods. (b) Whether the local government actively promotes aquaculture closures is restricted by the improvement in the aquatic environment, the aquaculture development under the existing livelihood, and the industrial economic benefits of the new livelihood. And the capacity of them contribute to the overall development of the local government. The development of the net income of both parties in the negotiation will shape the direction of a series of public policies that focus on aquaculture closures.
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Xuan, Bui Bich, and Erlend Dancke Sandorf. "Potential for Sustainable Aquaculture: Insights from Discrete Choice Experiments." Environmental and Resource Economics 77, no. 2 (August 4, 2020): 401–21. http://dx.doi.org/10.1007/s10640-020-00500-6.

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Abstract The growth in global aquaculture production may address the lack of sustainability in wild fisheries, alleviate poverty in rural and coastal areas, and help meet the worldwide increase in demand for animal protein. However, there is an ongoing debate about the severity of the environmental impact of aquaculture production. Investing in new high-tech production systems can address both productivity growth and the environmental externalities, but high investment costs hinder adoption of high-tech production methods. We investigate the potential of a payment for environmental services program easing access to capital for producers to increase willingness-to-invest in more sustainable aquaculture practices in Vietnam. We conducted two discrete choice experiments to explore the supply and demand side of the policy. First, we elicited the public’s willingness-to-pay to reduce the environmental impact of conventional shrimp aquaculture, and second, we elicited farmers willingness-to-accept a credit subsidy to invest in high-tech production methods. Our results show that the public care about reduced environmental impacts, while farmers strongly prefer increased productivity. Furthermore, the public’s willingness-to-pay for reduced environmental impacts exceeds producer’s willingness-to-accept a subsidy to invest under most scenarios. This implies a potential for more sustainable aquaculture production in Vietnam.
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Lam, Mimi E. "The Ethics and Sustainability of Capture Fisheries and Aquaculture." Journal of Agricultural and Environmental Ethics 29, no. 1 (January 18, 2016): 35–65. http://dx.doi.org/10.1007/s10806-015-9587-2.

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Bekyashev, Kamil, and Damir Bekyashev. "CURRENT ISSUES OF THE LEGAL STATUS AND ACTIVITIES OF THE FAO COMMITTEE ON FISHERIES." Fisheries 2021, no. 3 (June 7, 2021): 41–46. http://dx.doi.org/10.37663/0131-6184-2021-3-41-46.

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The article examines the legal status of the FAO Committee on Fisheries and assesses the prospects for its development. The legal nature and competence of the two sub-committees of the FAO Committee on Fisheries, the Sub-Committee on Fish Trade and the Sub-Committee on Aquaculture, are analyzed in detail. The question of the feasibility of creating a new subcommittee on fisheries management and the legal aspects of its establishment was considered. The results of the last – 34th session of the FAO Committee on Fisheries were summed up and its importance for the development of international legal fisheries management was determined.
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Dissertations / Theses on the topic "Environmental Sciences|Engineering, Environmental|Agriculture, Fisheries and Aquaculture"

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McIntosh, Dennis. "Reducing the environmental impact of aquaculture." Diss., The University of Arizona, 2002. http://hdl.handle.net/10150/289234.

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Aquaculture has great potential to help supply the nutritional needs of a growing population. To date, however, the benefits that aquaculture can have, have largely been overshadowed by the environmental degradation some segments of the industry have caused. The following body of work describes my efforts to help reduce the environmental impacts of aquaculture. By integrating aquaculture production into traditional agriculture, the impact of farming on already limited water resources and the reliance on chemical fertilizers can be reduced. Recent expansion of the aquaculture industry in Arizona has made it possible to study the integration of olive groves with marine shrimp culture. In chapter 3, I describe the characterization and evaluation of the effluent from an inland, low-salinity shrimp farm as a potential source of irrigation water. I found that 0.41 kg of ammonia-nitrogen, 0.698 kg of nitrite-nitrogen, 8.7 kg of nitrate-nitrogen and 0.93 kg of total phosphorus (TP) were made available as fertilizer each day in the effluent water. Based on the results of this first study, I decided to conduct a farm trial to quantify the effects of these shrimp farm effluents on olive trees. This work is described in chapter 4. Trees in all treatment groups grew an average of 40.1 cm over the four month study period. While growth of trees irrigated with shrimp farm effluent did not improve in respect to the other treatments, our results do indicate that irrigating with low-salinity water had no noticeable negative effects. Chapter 5 describes work conducted in Idaho, as part of a larger study aimed at reducing the effluent loads of phosphorus (P) from high density, flow-through aquaculture facilities. Research steps were taken to establish a relationship between TP and the carbon 12/13 isotope ratio (δ¹³C) and/or the nitrogen 14/15 isotope ratio (δ¹⁵N). Our findings suggest that both δ¹⁵N and δ¹³C are good better proxies for P, after correcting for P retention. A linear regression of %P (corrected) on δ¹³C and δ¹⁵N resulted in R2 values of 0.843 and 0.8622, respectively. This suggests that by tracking δ¹⁵N and/or δ¹³C through a high-density, flow-through aquaculture facility over time I will be able to determine the residence time of P with a high degree of accuracy.
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Goettel, Michael Thomas. "Analysis of the swimming behavioral response of western blacknose dace in a turbulence modified flow field." Thesis, State University of New York at Buffalo, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1539819.

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Fish passage success rates through hydraulic infrastructure have been historically low due to flow field conditions that exceed the physical or behavioral capabilities of a given species. Significant efforts to design and modify hydraulic structures for enhanced passage rates have failed to achieve the desired results, with a primary reason being a poor understanding of how fish respond to complex hydraulic conditions. Many contemporary research efforts have targeted the inter-relationship between hydraulics and fish behavior in the laboratory using live fish trials in an attempt to better comprehend these interactions and ultimately provide a basis for the development of biologically-based design criteria. In this study experiments were conducted to assess the behavioral responses along swimming trajectories of western blacknose dace ( Rhinichthys obtusus) in turbulent flow conditions. The objective was to test the hypothesis that the dace would preferentially adjust their swim paths to minimize their exposure to elevated turbulent conditions. Experimental data were collected through digital imaging of dace trajectories for fish that had been released into a shallow flume and allowed to swim through turbulence enhanced flow fields. Additionally, detailed velocity measurements were collected with an acoustic Doppler velocimeter to allow the comparison of dace trajectories to flow field conditions represented by average metrics of turbulent kinetic energy and Reynolds shear stresses. Analysis of the data consisted of the quantification of the proportion of the time that a dace's swim path selected a direction toward a lower magnitude turbulence condition when such an option existed. Fish paths were also graphically compared to turbulence contour plots to qualitatively assess the presence of swim path preferences or patterns. Lastly, video footage of each trial was evaluated to qualitatively assess the presence of novel behaviors that could have implications for the swimming trajectories observed. Results indicate that the dace did not preferentially avoid turbulence at statistically significant levels under the conditions experienced in the flume; however, data do suggest that some behavior relative to turbulence was non-random. Qualitative observations of video footage suggest that non-hydraulic factors, such as the presence of conspecifics and light intensity, also influence the swim path trajectories of the western blacknose dace. Future research will require more targeted turbulent conditions, simultaneous multivariate observations and analyses that factor in non-hydraulically-based behavior and the incorporation of coupled behavioral and hydraulic data at reduced time and length scales for primary variables. It is envisioned that the results of this study can provide guidance for future studies aimed at developing biologically based design criteria for enhanced fish passage at hydraulic infrastructure.

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King, Chad Eric. "Integrated agriculture and aquaculture for sustainable food production." Diss., The University of Arizona, 2005. http://hdl.handle.net/10150/280769.

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As we have come to depend on aquaculture to supplement natural fisheries, intensive culture methods have increased production. Accompanying environmental damage--non-point source pollution, loss of biodiversity and struggle for water--has offset food and financial gains. Problems surrounding food production are amplified in arid lands, as the potential of irrigated agriculture is weighed against the value of water. Through the following research, I studied integration of aquaculture and agriculture through multiple uses of water and nutrients, to reduce environmental impacts. When managed properly, integration can provide multiple cash crops, increased food and fiber production with reduced inputs. Integration allows for groundwater and nutrients in water and solid waste to be reused. Shrimp farms in Arizona use low-salinity ground water from aquifers for shrimp ponds and agricultural irrigation. On one of these farms, effluent is reused for irrigation of olive trees and other field crops. In Chapter 3, I described an experiment designed to quantify changes in the height of olive trees due to irrigation with shrimp effluent. Trees receiving effluent grew an average of 61.0 cm over the two-year experiment, 70.4 cm with fertilizer and 48.4 cm in the well water treatment. No negative effects due to effluent irrigation were found, while increases in water use efficiency were realized by producing two crops with the same irrigation water. Multiple uses of water are also possible in smaller scale agriculture systems. I performed a financial analysis of a small-scale aquaponics system, integrated hydroponics and aquaculture, in Chapter 4. Biological viability of such systems is clear. By building and managing this system for five months, I examined economic viability, by analyzing annual costs and revenue. Calculating net present value showed that the system was not financially viable unless labor costs were excluded. Financial returns were between 3,794 and 10,640 over six years. In five months, this system produced 181.4 kg of food, with fish feed, iron and water as the only inputs. This study showed potential for using small-scale aquaponics as a hobby, in schools, and as a tool for agricultural economics education, but not as a business opportunity.
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Brown, Jonathan Jed 1964. "Halophytes for the treatment of saline aquaculture effluent." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282715.

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The discharge of untreated aquaculture effluent can pollute receiving water bodies. I tested the feasibility of using salt-tolerant plants (halophytes) with potential as forage and oilseed crops, as biofilters to treat saline aquaculture effluent. Plants were grown in draining lysimeters in greenhouses and irrigated with effluent salinized with NaCl. Irrigation water came from a recirculating tilapia culture system. I measured yield potential, water use and capacity for nitrogen and phosphorus uptake. In Experiment 1, Suaeda esteroa, Salicornia bigelovii and Atriplex barclayana (Chenopodiaceae) were grown in sand in 0.02 m³ lysimeters. Plants were irrigated with effluent of 0.5 ppt, 10 ppt and 35 ppt salinity, to meet evapotranspiration demand and to allow 30% of the applied water to leach past the plant root zone. Despite the high leaching fraction and short residence time of water in the pots, the plant-soil system removed 98% and 94% of the applied total and inorganic nitrogen, respectively, and 99% and 97% of the applied total and soluble reactive phosphorus respectively. For all species, salt inhibited (P ≤ 0.05) the growth rate, nutrient removal, and volume of water the plants could process. The salt marsh species S. esteroa and S. bigelovii performed better than the desert saltbush, A. barclayana, at 35 ppt. In Experiment 2, Suaeda esteroa, was grown in lysimeters containing approximately 0.8 m³ sandy loam soil and irrigated three times per week with 31 ppt NaCl effluent. I used five irrigation treatments, ranging in volume from 50 to 250% of the potential evaporation rate. Plant biomass and water consumption increased significantly (P ≤ 0.05) with increasing irrigation volume. Nitrate concentrations in water draining from the lysimeters decreased during the experiment, and were significantly lower in the high-volume treatments than in the low-volume treatments. Phosphorus concentrations in the leachate water increased during the experiment as a function of increasing irrigation volume. Irrigating halophyte crops with aquaculture wastewater of seawater-salinity may be a viable strategy for disposal of effluent.
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Azevedo, Celicina Maria da Silveira Borges 1955. "Nitrogen transfer using ¹⁵N as a tracer in an integrated aquaculture and agriculture system." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/288918.

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Integration of aquaculture with agriculture appears to be an excellent way to save water, dispose of aquaculture effluents, and provide additional fertilizer to the agricultural crop. However, the amount of nitrogen transferred from fish effluent to plants has not been quantified. Therefore, I tested the feasibility of using ¹⁵N labeled fish feed, to produce a labeled effluent that could be used to study the fate of nitrogen in an integrated aquaculture and agriculture system. A pilot project showed that tilapia accepted labeled feed, that ¹⁵N ammonium sulfate was not hazardous to fish, and that labeled effluent could be detected in lettuce. Two experiments irrigating lettuce with the labeled effluent showed the pathways of nitrogen movement. Different combinations of chemical fertilizer and tap water and fish effluent were used to irrigate lettuce. Nitrogen transfer was quantified based on the percentage of ¹⁵N recovered from the fish effluent by plants. Lettuce that received fish effluent as the only source of nitrogen recovered practically all the available inorganic nitrogen. However, there was not sufficient nitrogen for optimal plant growth. Plants that received a combination of fish effluent and chemical fertilizer were more efficient at uptaking the nitrogen in the chemical fertilizer than in the fish effluent. Available inorganic nitrogen levels in fish effluent were generally too low to meet the nitrogen needs of plants. However, decomposition of organic material over time may improve long term soil fertility. Concentration of fish culture effluent might also increase nutrient content. The nitrogen budget for fish tanks used to produce effluent for these studies showed that fish contained the highest amount of nitrogen, followed by algae and effluent in descending order. Estimates of nitrogen assimilation based on ¹⁵N recovery from labeled fish feed did not agree with calculations based on recovery of total nitrogen. Therefore ¹⁵N recovery does not appear to be a good indicator of nitrogen assimilation by fish in short term experiments.
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Shomo, Laurie Suzanne 1951. "Biotic and physico-chemical conditions in a cooling reservoir of a coal-fired power plant." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/277958.

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Cholla Lake is a cooling reservoir for the coal-fired Cholla electrical generating plant. The lake provides recreational fishing and water contact recreation. The fish populations are self-sustaining. I collected water, sediment, and whole body fish samples to be analyzed for levels of some possibly toxic inorganic constituents. I also measured dissolved oxygen, pH, Secchi disk transparency. I compared current fish population structure, fish stomach contents, and the frequency of occurrence of benthos, with those same parameters in previous studies. Water temperature and turbidity have increased; catfish and bluegill have increased in their relative abundance; and the density of benthic invertebrates has decreased. Aquatic insects occur most commonly in the stomach contents of bluegill and filamentous algae in the stomachs of catfish. Selenium levels in all matrices exceed national averages and are above levels in a nearby reservoir unaffected by the power station.
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Villegas, Selso Valenzuela 1952. "Dynamics of selenium in Cibola Lake, Arizona." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/288703.

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Selenium bioaccumulates along the lower Colorado River and may impact fish and waterfowl. Selenium may be reduced in lakes or reservoirs by flushing (increasing the water exchange rate). Therefore, I monitored selenium levels in water, sediment, and bluegill (Lepomis macrochirus) in response to flushing on the Cibola NWR in the lower Colorado River Valley, California and Arizona. Selenium in the lakewater was below the detection level of 5.6 ppb wet weight (WW) but data from the US Geological Survey (1990-1995) showed that selenium levels in the water ranged from 1 to 3 ppb WW in the mainstem Colorado River 135 km upstream from Cibola Lake. There was no predictable trend in selenium in the sediment after flushing. It was the same after the first flushing, lower after the second flushing, and higher after the third flushing. Selenium levels in the biota also did not vary in a predictable way after flushing. It went up after the first flushing, down after the second flushing, and up after the third flushing. One might speculate that higher flushing rates, or continuous flushing might result in lower selenium levels in biota and sediment. However, selenium levels in the sediment (1.10 ppm DW) and bluegill (4.93 ppm DW) in Cibola Lake were not significantly different than levels in the sediment (0.86 ppm DW) and bluegill (4.83 ppm DW) in a comparable backwater lake (Mittry Lake, Arizona) that was continuously flushed. Therefore, flushing does not appear to be a viable strategy for managing selenium levels in backwater lakes along the lower Colorado River.
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Bourillon-Moreno, Luis. "Exclusive fishing zone as a strategy for managing fishery resources by the Seri Indians, Gulf of California, Mexico." Diss., The University of Arizona, 2002. http://hdl.handle.net/10150/279963.

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I analyzed the Seri Exclusive Fishing Zone (SEFZ) in the Gulf of California, to assess its efficiency in solving common fisheries management problems related to open access resources. A review of the major historical changes in the socio-cultural context of marine natural resource use in the region showed the SEFZ has allowed the Seri to successfully keep and improve control of access to the Infiernillo Channel, as well as reduce competition with fishers from Bahia Kino in a region with increasing competition for marine resources. However, the SEFZ showed severe limitations that produced conflicts of variable intensity. The most important were lack of clear geographic limits to SEFZ, clear systems to transfer fishing rights, and rights to defend with armed guards the integrity of their marine territory. The role of Seri and Federal Government authorities in conflict creation and resolution and the perception of the outcomes of these conflicts for Seri and Bahia Kino fishers are analyzed on four recent conflict events. Several potential opportunities to promote co-management of fisheries by the federal government and local fisheries management authorities emerged from the SEFZ. However, none of these opportunities, in the form of informal arrangements, succeeded in creating better relationships between Seri and Bahia Kino communities of fishers. I used the jaiba (Callinectes bellicosus) crab fishery inside the SEFZ to assess dynamics of marine resources under Seri common property ownership. I found that inside the SEFZ fishing effort is controlled, the fishing ban is honored, fishing areas are rotated throughout the season, and no-fishing zones are functional. I used data from jaiba buyers, and extensive catch sampling during two fishing seasons, to determine yearly production in Punta Chueca, as well as average daily catch and other descriptive catch statistics. Jaiba is an important resource in the economy of Punta Chueca, and its local management has been facilitated by the SEFZ to produce a fishery that, to date, appears to be sustainable. However, the long-term viability of this fishery inside the SEFZ is vulnerable to outside harvesting patterns and to political and economic influences over which the Seri have no control.
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9

Al-Reasi, Hassan Ali. "Tracking mercury biomagnification in fish from the Gulf of Oman using stable isotopes (carbon-13carbon-12 and nitrogen-15nitrogen-14)." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/26836.

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Attempts to use stable isotope carbon (delta13C) and nitrogen (delta15N) ratios to construct trophic positions and track mercury biomagnification in zooplankton and 13 fish species from a coastal food web of the Gulf of Oman illustrated some potential differences in this environment compared to the aquatic ecosystem of the northern hemisphere. Due to the large difference in delta13C values (3.4‰) between zooplankton planktivorous fish species (S. crumenophthalmus, S. longiceps and R. kanagurta), zooplankton would seem to not be the primary diet of these fish species as commonly described in literature. Total mercury (T-Hg) concentrations of zooplankton were very low (range 0.010 to 0.037 mug·g-1, N = 27) with a mean methyl mercury (MeHg) of 0.001 mug·g-1 (range 1-19%, N = 5). The lowest T-Hg (0.003 mug·g-1) was found in planktivore (S. longiceps) and the highest was 0.760 mug·g -1 in predator shark (R. acutus) with average MeHg for all fish of 72% (range: 33-100%, N = 150). Using 15 N as indicator of trophic position, neither total mercury (T-Hg) nor methyl mercury (MeHg) were found to biomagnify. Regression slopes were 0.08 and 0.05 for T-Hg and MeHg respectively as a function of delta15 N. This indicates that biomagnification was lower in this tropical ocean compared to that found in freshwater and marine ecosystems of the arctic and temperate zones. Methyl mercury levels in the fish species commonly consumed are low and intake calculations showed that individuals can safely consume fish.
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Nwobu, Ogochukwu L. "Methylmercury uptake and bioconcentration by the freshwater green alga Pseudokirchineriella subcapitata." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/26997.

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Methylmercury (MeHg) enters most aquatic food webs primarily at the phytoplankton level. However, in the complex aquatic ecosystem, it is difficult to fully examine specific pathways. Consequently, in this study, the uptake of environmentally realistic levels of added MeHg concentrations (0.21 to 20 ng Hg L-1 ) by the freshwater green alga Pseudokirchniriella subcapitata grown in batch and semi-continuous cultures at biomass levels of (0.03, 0.15, 0.3 and 3 mg (dw) L-1) was investigated. In algal culture media without dissolved organic carbon (DOC) and in river water samples with DOC concentration of (2.8 mg L-1) uptake, uptake rate constant, algal concentration of MeHg and the bioconcentration factor (BCF) after 48 h was measured. MeHg uptake was biphasic, with rapid uptake of at least 50% of the total uptake taking place over the first 2 h of incubation followed by a more gradual uptake for the remaining 46 h. Desorption of MeHg from algal cells by re-suspension in acidic medium (pH 3) was < 10% of the total uptake at 48 h. Uptake rate constants of MeHg (ku) increased with aqueous MeHg concentration (r2 = 0.99). At 48 h, algal concentration of MeHg (MeHg (ng) divided by dry weight of algal biomass (g)) increased with aqueous MeHg concentration (r2 = 0.98) but decreased with increasing biomass (r2 = 0.75). This was shown to be a biomass dilution effect as the total uptake of MeHg did increase with biomass. Log MeHg BCF decreased with increasing algal biomass (r 2 = 0.99) with values of 6.9, 6.2 and 5.2 at 0.03, 0.3 and 3 mg (dw) L-1 respectively at all concentrations of MeHg added (0.5, 1.0 and 20 ng L-1).
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Books on the topic "Environmental Sciences|Engineering, Environmental|Agriculture, Fisheries and Aquaculture"

1

Symposium on Climatic Change and Northern Fish (1992 Victoria, B.C.). Climate change and northern fish populations. Ottawa: National Research Council of Canada, 1994.

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L, Hamelink J., and SETAC (Society), eds. Bioavailability: Physical, chemical, and biological interactions. Boca Raton: Lewis Publishers, 1994.

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Benson, William H., Jerry Hamelink, Peter F. Landrum, and Harold Bergman. Bioavailability: Physical, Chemical, and Biological Interactions (Setac Special Publications Series). CRC, 1994.

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1946-, Davenport J., ed. Aquaculture: The ecological issues. Malden, MA, USA: Blackwell Science, 2003.

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Burnell, Gavin, Sarah Culloty, Suki Ekaratne, Bob Furness, and Tom Cross. Aquaculture: The Ecological Issues. Wiley & Sons, Incorporated, John, 2008.

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Davenport, John, Gavin Burnell, Sarah Culloty, Suki Ekaratne, and Tom Cross. Aquaculture: The Ecological Issues. Wiley & Sons, Incorporated, John, 2009.

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Davenport, John, Gavin Burnell, Sarah Culloty, Suki Ekaratne, Bob Furness, Maire Mulcahy, Helmut Thetmeyer, Tom Cross, and Kenneth Black. Aquaculture: The Ecological Issues (Ecological Issues Series). Blackwell Publishing Limited, 2003.

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1937-, Cooke G. Dennis, ed. Restoration and management of lakes and reservoirs. 2nd ed. Boca Raton, Fla: Lewis Publishers, 1993.

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Welch, Eugene B., Spencer Peterson, Peter Newroth, and G. Dennis Cooke. Restoration and Management of Lakes and Reservoirs, Second Edition. 2nd ed. CRC, 1993.

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Nichols, Stanley A., Eugene B. Welch, Spencer Peterson, and G. Dennis Cooke. Restoration and Management of Lakes and Reservoirs. Taylor & Francis Group, 2016.

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Book chapters on the topic "Environmental Sciences|Engineering, Environmental|Agriculture, Fisheries and Aquaculture"

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Navarro-Barranco, Carlos, Macarena Ros, José M. Tierno de Figueroa, and José M. Guerra-García. "Marine Crustaceans as Bioindicators: Amphipods as Case Study." In Fisheries and Aquaculture, 436–62. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190865627.003.0017.

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A bioindicator species can be defined as “an organism that provides information on the environmental conditions of its habitat by its presence or absence, and its behavior.” In this sense, crustaceans present many biological and ecological characteristics that make them particularly useful as bioindicators (e.g., widespread distribution in different habitats and geographical areas, key role in community functioning, great diversity of life history strategies). Within Crustacea, the order Amphipoda has been considered an especially relevant and suitable group due to its direct development and its special sensibility to disturbances, among other reasons. Crustaceans can be used in biomonitoring studies in a wide variety of habitats (e.g., both soft- and hard-bottom substrata from intertidal to deep environments) and for different types of environmental stressors. An extensive amount of literature has reported the sensitivity of crustacean species to heavy metal contamination, sewage and desalination discharges, or engineering and aquaculture activities, among others. Special emphasis has been placed on the role of crustaceans in the most used indexes (e.g., AMBI, BENTIX, BOPA) developed to establish the environmental quality of European coastal and marine areas. Crustaceans are one of the groups with a higher contribution to those indexes, although their presence is not necessarily indicative of low environmental disturbances. Within amphipods, the importance of the family Caprellidae as a monitoring tool in environmental programs (e.g., trace metal or tributyltin pollution) is highlighted. Alien crustaceans can also play a pivotal role as bioindicators of anthropogenic pressures, and their likely influence on the accuracy of ecological assessment programs should be taken into account. Finally, there is an increasing need to improve our scarce taxonomic knowledge in many crustacean groups since that information is vital for the correct development of monitoring tools. Studies dealing with the species’ ecological and biological traits are also encouraged in order to understand the potential application of these species as bioindicators.
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Conference papers on the topic "Environmental Sciences|Engineering, Environmental|Agriculture, Fisheries and Aquaculture"

1

Khoshnevis Yazdi, Soheila, and Anahita Fashandi. "The economic effects of climate change on fisheries and aquaculture." In 2010 International Conference on Environmental Engineering and Applications (ICEEA). IEEE, 2010. http://dx.doi.org/10.1109/iceea.2010.5596159.

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Jeong, S. J., J. K. Shin, J. Y. Lee, and J. H. Yoon. "Development of the New Aquaculture Fishcage for Open Ocean Areas." In 25th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/omae2006-92534.

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Until now, Korean aquaculture industry has been grown largely in quality and quantity. However, an increase of quantity has caused lots of problems like sea pollution lately. Nearly 82% of Korean aquaculture farms had been installed mainly at inshore of the southern sea, so, sewage, factory wastes, high density of farms at the limited area and autoinfection have deteriorated inshore fisheries. Now, the open sea has been on the rise for the solution to these problems since it has clear seawater that will expect to decrease the environmental pollution with much current. As a matter of fact, it is impossible to move the existing fish cages to the open sea due to the rough environmental conditions such as higher waves, strong currents etc.; therefore, it is necessary to develop new fish cage equipment that will fully meet the open sea conditions. In this research, the theoretical study and experimental analysis have been carried out for the structural fish cage design which is feasible for the open sea.
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Leira, Bernt J. "Multi-Purpose Offshore-Platforms: Past, Present and Future Research and Developments." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62691.

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Energy, fisheries and transport infrastructures are increasingly being established offshore. Facilities such as offshore wind farms may occupy large areas and compete with other users of the maritime space. Accordingly, offshore platforms that can combine many functions within the same infrastructure could offer significant benefits. This applies to economy, optimization of spatial planning and minimization of the impact on the environment. In the present paper, some proposed innovative designs for multi-use offshore platforms are described. The technical, economical and environmental feasibility of designing, installing, operating, servicing and maintaining such platforms are discussed. The relevant platforms under consideration are targeted towards ocean renewable energy (in particular offshore wind), aquaculture and related transport maritime services. Innovative designs for multi-use offshore platforms that intend to allow optimal coupling of the various activities and services are highlighted. Issues such as safe and efficient installation, operation, maintenance and monitoring are also briefly discussed in the paper.
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Lagasco, F., M. Collu, A. Mariotti, E. Safier, F. Arena, T. Atack, G. Brizzi, et al. "New Engineering Approach for the Development and Demonstration of a Multi-Purpose Platform for the Blue Growth Economy." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96104.

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Abstract Aquaculture is currently the fastest growing food sector in the world and the open oceans are seen as one of the most likely areas for large-scale expansion [1], [2], [3]. The global demand for seafood is continuing to rise sharply, driven by both population growth and increased per capita consumption, whilst wild-capture fisheries are constrained in their potential to produce more seafood. A recently funded EC project, the Blue Growth Farm – BGF (GA n. 774426, 1st June 2018 – 30th September 2021) aims at contributing to this world need with an original solution. The Blue Growth Farm proposes an efficient, cost-competitive and environmentally friendly multi-purpose offshore farm concept. It is based on a modular floating structure, moored to the seabed, meeting requirements of efficiency, cost-competitiveness and environmental friendless, where automated aquaculture and renewable energy production systems are integrated and engineered for profitable applications in the open sea. In the present paper, the overall engineering approach developed to carry out the research work is presented, described and justified. Different technical and scientific challenges are addressed through an integrated industrial engineering design approach, where all disciplines are tuned to achieve the Blue Growth Farm main targets. These are represented by: i) guaranteeing expected nominal fish production thanks to advanced automation and remote control capabilities; ii) minimizing the pollution introduced at marine ecosystem level when exploiting the marine natural resources, whilst increasing the social acceptance and users community agreement; iii) maximizing the electricity production in the Blue Growth Farm potential installation area ecosystem to provide energy supply to the on-board electrical equipment and to dispatch the extra produced electric energy to the land network. Preliminary engineering design results are promising to demonstrate effective increase of safety and efficiency by reducing on-board human effort and consequently risks at offshore, thus to make commercial-scale open ocean farming a reality. The present paper introduces overall concepts and design methodology whilst other companion works submitted at OMAE2019 [4], [5], [6] provide insight of specific aspects of the Blue Growth Farm project elaborated during the first six months activity.
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