fish barrier Articles

  • TURBIDITY BARRIER ULTIMATE GUIDE

    TURBIDITY BARRIER ULTIMATE GUIDE Definition Floating turbidity barriers (a.k.a. silt curtains, silt boom, sediment curtain) are a temporary in-water sediment barrier consisting of a continuous geotextile fabric curtain suspended from a flotation device on the water surface and held in ...

  • Sea Turtle Conservation: An `Illegal` Trade Barrier?

    In fisheries around the globe, by-catch is a serious threat to marine organisms. By-catch includes both non-target species (e.g. fish, seabirds, turtles and marine mammals) and immature individuals of the target species. Experts estimate that discarded by-catch accounts for around 30 per cent of the global catch.1 Several international agree- ments have addressed the issue of by-catch, including ...


    By IOS Press

  • Linking North Slope of Alaska climate, hydrology, and fish migration

    Arctic grayling (Thymallus arcticus) have a life-history strategy specifically adapted to the extreme climate of the North. These fish migrate to spawning grounds just after breakup in the spring, then migrate to feeding sites in early summer, and finally in the fall migrate back to their overwintering sites. The Kuparuk River is a perennial stream originating in the northern foothills of ...


    By IWA Publishing

  • Less Than 3 Percent of Oceans in Marine Parks Despite Recent Growth

    In May 1975, rising concerns about overfishing and deteriorating ocean health prompted scientists and officials from 33 countries to meet in Tokyo for the first global conference on marine parks and reserves. Noting the need for swift action to safeguard more of the sea, the delegates were unanimous in calling for the creation of a global system of marine protected areas (MPAs)—zones ...


    By Earth Policy Institute

  • Hydrocarbon contamination of a typical mangrove floor in Niger Delta, Nigeria

    The impact of petroleum hydrocarbons on the floor of a mangrove system located on one of the intertidal lands behind the barrier islands of Niger Delta basin of southern Nigeria was evaluated following the Obiafu-14 oil spillage. The area covered by the oil spill was delimited by reconnaissance and soils were sampled by grid method from the bottom and middle slopes of oil-affected and unaffected ...

  • Humic substances alleviate the aquatic toxicity of PVP‐coated silver nanoparticles to organisms of different trophic levels

    It was investigated how humic substances (HS) modify the aquatic toxicity of silver nanoparticles (AgNPs) as these particles agglomerate in water and interact with HS. An alga species (Raphidocelis subcapitata), a cladoceran species (Chydorus sphaericus) and a freshwater fish larva (Danio rerio), representing organisms of different trophic levels, were exposed to colloids of the ...


    By John Wiley & Sons, Ltd.

  • Behavioral influences on risk of exposure to fecal contamination in low-resource neighborhoods in Accra, Ghana

    Rapid urbanization in low-resource countries has led to a growing sanitation crisis, with widespread fecal contamination and risk of adverse health outcomes. Understanding how to change sanitation behaviors and reduce exposure to fecal contamination is central to Sustainable Development Goal 6. This study examines behavioral influences on fecal contamination in six low-resource neighborhoods ...


    By IWA Publishing

  • PCB dredging cleanup project begins on Lake Cochituate (USA) case study

    A large ring of yellow buoys floats beside an a LWT 8” Swinging Dragon swinging ladder dredge on the surface of Pegan Cove, marking the area where contractors have started removing sediment contaminated with PCBs, left by an accident at the Soldier Systems Center 30 years ago. The PCBs were found in the section of Lake Cochituate just to the east of Natick Labs. They came from a ...

  • Scientists, a new quota species?

    Globally, marine conservation is high on the agenda. The need to protect and conserve species and habitats from deleterious anthropogenic impacts has never been of more concern than it is currently. However, that is not to say we, as a society, are achieving effective marine conservation, in fact we are far from it. Global summits have come and gone, as have the targets they set for marine ...

  • Design of a channel and floodplain corridor to restore aquatic habitat, geomorphic function and water quality in an urbanized and regulated watershed

    The City of Cupertino, California has proposed the establishment of the Stevens Creek Corridor Park. At the park site, Stevens Creek has an incised alluvial channel. Bed morphology is typified by riffles and pools with some external forcing by in-stream large woody material. The channel has been subjected to hydromodification and general anthropogenic disturbance due to upstream reservoir ...

  • The quick and easy solution for pond leaks

    Are you tired of trying to fix that pond leak. Tried product after products For over 30 years ponds and fountains have been coated with epdm liners and have been seen as the only solution for pond repair. Many people are not aware that there is a liquid version of epdm rubber that has been specially formulated for fish friendly ponds. This one coat application has been the solution for thousands ...


    By Pondpro2000

  • Orange county goes green

    As individuals, many Orange County residents help fulfill the mandate to be environmentally conscious by recycling plastic bottles and aluminum cans, employing strategies to reduce domestic water consumption and making personal transportation more fuel-efficient. In the Orange County governmental structure, similar and often little known practices are being followed by departments and agencies ...


    By Waste Advantage Magazine

  • In Your Face (Mask) - Environmental degradation starts to affect us here and now.

    Untitled Document What propelled environmental issues to the forefront of public concern from the late 1960s to the mid 1980s? The problems were in your face and up your nose. The ...

  • Wetlands International Annual Review 2010

    Our annual review provides a great and global overview of all our achievements, our projects, our publications and other products, our donors and our financial situation. Conserving wetland biodiversity 2010 was the International Year of Biodiversity, which culminated in the Nagoya conference on the Convention for Biological Diversity (CBD). Thanks to the work of our team, the ...


    By Wetlands International

  • Water quality is key to the success of Cardiff Bay

    Water quality has been a central theme in a redevelopment project that began with the creation of the Cardiff Bay Development Corporation in April 1987. This article will examine the role that water quality has played in the remarkable transformation that has taken place in Cardiff and explain how monitoring technology has developed to the stage whereby any person, anywhere in the world, can view ...

  • The Trans-Pacific Partnership — friend or foe to the environment?

    On October 5, 2015, Canada announced that it had concluded negotiations of the Trans-Pacific Partnership (“TPP”). The TPP is a free trade agreement which will provide Canada with preferential and unprecedented access to the Asia-Pacific Region. The TTP is currently comprised of twelve Pacific-rim countries, representing a market of 800 million people. The TTP will need to be ...


    By GLOBE SERIES

  • Obama provides economic stimulus money for important water projects

    California and indeed the entire western region of the United States, face chronic issues with respect to water use management. As reported in a December 2008 article on this site, California faces special problems intensified by cycles of drought; additionally, budget shortfalls are compounding the problems by limiting what the State can accomplish. Some relief may be in sight, though; in April ...


    By H2bid, Inc.

  • How Much Are Ecosystems Really Worth?

    How do people, governments, and corporations “value” ecosystems? And how can you put a price on the vast array of social, economic, and environmental benefits that ecosystems provide? These are just two of the questions experts sought to address at “The Future of Revaluing Ecosystems,” an event WRI recently convened in ...

  • Regulating Health and Environmental risks under WTO Law: A critical analysis of the SPS Agreement

    The WTO has now been in existence for over 15 years. Primarily designed to regulate inter-national trade, the link with environmental protection is increasingly being recognised by policy makers and is now also being reflected in scholarly research and publication. This book is one such text. It considers the specialised subject of health and environmental risks under WTO law, in particular, ...


  • The Benefits of Nitrogen and Carbon Dioxide for Food Processing

    The Benefits of Nitrogen and Carbon Dioxide for Food Processing A blend of gases -- carbon dioxide, oxygen, and nitrogen -- help preserve packaged food by reducing the amount of oxygen inside the sealed package. Gas flushing or Modified Atmosphere Packaging, as the process is called, also reduces the amount of processing that food must undergo. This preserves the quality and ...

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