Showing results for: fishery Articles
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When the traditional meets the modern: the sustainability of the artisanal fishing in Guanabara Bay, Brazil
The industrial development that has contributed to economic prosperity and advancement of standard of living has also brought new risks to people's every day lives and to the environment. This fact has been evident in the multiple uses of environmentally sensitive ecosystems, often resulting in conflicts among the users. This trend is especially apparent in countries like Brazil, where the issues ...
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The economic contributions of anglers to the Los Cabos economy: quantifying value in a sustainable fishery
In 2007 and 2008, a comprehensive study was conducted to estimate the dollars, jobs and tax revenues created by anglers in the Los Cabos region. In that period an estimated 354,013 people, most all of them international visitors, fished in Los Cabos. While in Los Cabos, they spent an estimated $1,785 each for lodging, charter boats, food, transportation, tackle, fuel, and much more. These ...
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The Role of Mangroves in Fisheries Enhancement
In 2011 humans caught and consumed 78.9 million tonnes of fish, crustaceans, molluscs and other species groups from the world’s oceans, accounting for 16.6% of the world’s animal protein intake (FAO 2012). This is projected to increase further, to over 93 million tonnes by 2030 (World Bank 2013). Global demand for fish products has increased dramatically over recent decades. Fishing ...
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Effects of ENSO 1997?1998 on the distribution of small pelagic fish off the west coast of Baja California
Changes in the Small Pelagic Fish (SPF) densities and distribution during ENSO 1997?1998 were found from observations made between 1994 and 2001 along the northwestern coast of Baja California, Mexico. Results showed that temperature and variables associated with the surface mixing processes had an effect on the SPF shoal behaviour and distribution. Between September and December 1997, acoustic ...
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Expanding marine protected areas to restore fisheries
After World War II, accelerating population growth and steadily rising incomes drove the demand for seafood upward at a record pace. At the same time, advances in fishing technologies, including huge refrigerated processing ships that enabled trawlers to exploit distant oceans, enabled fishers to respond to the growing world demand. In response, the oceanic fish catch climbed from 19 million tons ...
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Adsorption isotherm of uranyl ions by scales of Corvina fish
Fish scale is a by-product of fishery. The scales are mainly formed by hydroxyapatite and collagen, forming a kind of natural composite with a large specific surface area that intensifies the adsorption process. In this paper, the potential of adsorption of scales of Corvina fish for uranyl ions from nitric solutions was studied. Equilibrium and kinetic studies in adsorption of uranyl ions in ...
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What are the impacts and solutions to rising feed ingredient prices for aquaculture?
Our world population is climbing, and agriculture must rise to the challenge of producing a much larger portion of daily food intake for that population. One option that is gaining popularity is aquaculture, which provides much greater yields at lower inputs than harvesting a dwindling wild population of edible fish. But rising feed ingredient prices are beginning to have an impact on the ...
By BESTMIX
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Taxpayer dollars subsidizing destruction
One way to correct market failures is tax shifting—raising taxes on activities that harm the environment so that their prices begin to reflect their true cost and offsetting this with a reduction in income taxes. A complimentary way to achieve this goal is subsidy shifting. Each year the world's taxpayers provide at least $700 billion in subsidies for environmentally destructive activities, such ...
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Community response to ban on fishing and associated environmental problems: lesson learnt from River Swat, North of Pakistan
This study was conducted during 2006–2010 on River Swat, North of Pakistan. River Swat is the largest tributary of the Kabul River, which ultimately joins the Indus River. Fishing is a regular activity on the entire River Swat and is a major source of recreation and livelihood. This activity caused a decline in fish populations and ultimately fishing has been banned since 1982. This study ...
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The advantages and disadvantages of culturing fish.
The advantages and disadvantages of culturing fish. Experts develop practical recommendations for decision-makers, scientists and producers for a sustainable development of Mediterranean aquaculture. Human demand for fish is growing steadily. With fisheries decreasing worldwide, aquaculture is becoming an important socio-economic alternative and a source of proteins and healthy oils. ...
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Future Brief: Sustainable Aquaculture
Is sustainable aquaculture possible? Aquaculture is facing a new era of expansion in Europe. What are the environmental implications of this, and how can the sector expand sustainably? This Future Brief from Science for Environment Policy presents an overview of research into aquaculture’s impacts, and considers how it could develop in harmony with environmental goals. The EU’s Blue ...
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The Effect of Creosote on Vitellogenin Production in Rainbow Trout (Oncorhynchus mykiss)
Abstract As part of a broader investigation into the effects of creosote treatments on the aquatic biota in pond microcosms, we examined the possible implications for vitellogenin (Vtg) production in Oncorhynchus mykiss [rainbow trout (RT)]. Vtg is the precursor of egg yolk protein and has emerged as a useful biomarker of exposure to estrogenic substances. Our a priori intent was to assess the ...
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Linton Lock (UK) - Case Study
At Linton Lock on the River Ouse between York and Harrogate (North Yorkshire) a LANDY hydropower screw is used to generate sustainable energy, in a fish-friendly way. The screw dimensions 3 meter diameter and 8.5 meter length. It concerns an open compact Archimedes screw, which requires minimal civil work on site. Location: Linton Lock, York, UK Type of screw: compact Capacity: 4.5 m3/sec ...
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A novel fish-drying technique for better environment, quality and sustainability
This study deals with the development of appropriate sustainable strategies for environmental-benign aquatic processing systems. In this regard, the interactions between the aquatic system and its environment are first defined. Second, the effect of environmental pollution decreasing the fish quality in the aquatic systems has been exposed. Third, some sustainable strategies for improving the ...
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Effect of three fungicides on in vitro growth of Fusarium solani and Fusarium semitectum, parasitic on Odontesthes bonariensis eggs
An in vitro evaluation of the effect of three fungicides on the growth rate (GR) of Fusarium solani and Fusarium semitectum was performed. The tested fungicides, commonly used in fish farming, were sodium chloride (NaCl), methanol-stabilised formaldehyde (F) and malachite green (MG). Both Fusarium species were isolated from eggs of the Argentinean pejerrey Odontesthes bonariensis (Valenciennes, ...
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Smell no evil: Copper disrupts the alarm chemical response in a diadromous fish, Galaxias maculatus
Fish, at all life stages, utilise olfactory information in the decision‐making processes essential to survival. Olfaction is a sensitive sensory process, and toxicants within urban aquatic environments can have destructive or depreciating effects. In this study, we exposed Galaxias maculatus, a native fish commonly found in urban waterways throughout south‐eastern Australia, to one of five ...
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Response of fish tissue mercury in a freshwater lake to local, regional, and global changes in mercury emissions
A suite of mechanistic atmospheric and mercury cycling/bioaccumulation models is applied to simulate atmospheric mercury deposition and mercury concentrations in the water column and fish in a mercury‐impaired freshwater lake located in the northeastern United States that receives its mercury loading primarily through deposition. Two future‐year scenarios evaluate the long‐term response of ...
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Detection of biotic responses to urbanization using fish assemblages from small streams of western Georgia, USA
We examined relationships between stream fish assemblages and land use alteration associated with urbanization in 15 lower Piedmont watersheds along an urbanization gradient north of Columbus, western Georgia. Based on land cover data from 2002 Landsat 7 TM imagery aerial photos, streams drained watersheds that were largely urban, developing (suburban), agricultural (pasture), managed pine ...
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Improving fish farmers’ climate change adaptation strategies through information utilisation in Akinyele local government area of Oyo State, Nigeria: implication for sustainable fish production
This paper assesses the information utilisation by fish farmers on climate change adaptation strategies with the view of improving their adaptation to climate change and as well increasing fish production in Nigeria. A survey was carried out to obtain data from the farmers. The data collected were analysed by using frequency count, mean and percentage. Information that could have improved ...
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Modifications of macrobenthos assemblages on land–based fish farm phytotreatment basins in the Orbetello lagoon
In the Orbetello lagoon basin there are some intensive land–based fish–farming facilities which contribute to cause a significant cyclic development of the opportunistic chorophycea Ulva laetevirens, and consequent serious decay events in spring and summer. To minimise the nutrients' impact, fish farming was supplied with phytotreatment system. The purpose of this study was to ...
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