fish hatchery Articles

  • The Use of Ozone as a Disinfectant in Fish Hatcheries and Fish Farms

    The ever increasing load on the environment calls for more intensive measures to maintain the natural equilibrium. This is especially the case when it comes to the different life forms in rivers and lakes. In order to maintain indigenous fish populations it has become necessary in many countries to introduce stocking programs for coarse fish in addition to the ever increasing activities involving ...

  • State Fish Hatcheries and Invasive Species Don’t Mix

    INTRODUCTION The Vermont Fish and Wildlife Department is responsible for the protection and management of the state’s fish populations. Cultured fish are stocked in natural and manmade areas that are excellent for growth and survival but have little or no spawning habitat. Other stocking areas include natural water bodies where spawning and nursery habitats have been destroyed or isolated from ...

  • Hatchery- Grieg Seafood, Canada

    Installed in November 2004 Scope of supply: Three systems, Photon PMD320K6/10, including automatic quartz cleaning system. Duty/ Standby operation. Challenge: The main target organism is Furunculosis (Ameromonas Salmonicida). Total Flow: 900 m3/h Transmittance: 88% in a 10 mm cell Background The threat of disease is one of greatest dangers to a ...

  • Wild Rose State fish hatchery renovation case study

    Wisconsin Department of Natural Resources Wild Rose, Wisconsin, USA After more than 100 years, the Wild Rose hatchery in central Wisconsin was showing its age. Wastewater discharge to a nearby Class 1 trout stream was also a cause of concern. With HDR as its fisheries consultant, the state decided to replace the facility based on the need to address comprehensive ...


  • Monitoring Ozone (in the air) in Hatchery & Fish Farm Ozone Injection Systems

    Hatcheries, fish farms and such in the aquaculture industry require clean water to maintain a high survival rate while rearing aquatic animals. Contaminated water increases the risk of infection which in turn can compromise production. A common way to disinfect water is by generating ozone on-site with an ozone generator, which is commonly inside an ozone generator room. For human safety, ...

  • Migration barriers protect indigenous brown trout (Salmo trutta) populations from introgression with stocked hatchery fish

    Brown trout populations in the Belgian rivers Scheldt and Meuse have been intensively stocked in the past decades, often with material of uncertain origin. Moreover, the species habitat has become increasingly fragmented, preventing gene flow between neighboring populations. We assessed how this impacted genetic diversity and population structure by analyzing 12 wild populations (total n=309) and ...


    By Springer

  • Fish Farms - Inspections below the surface

    Fish farms are tackling the increased demand for aquatic food, while underwater drones are tackling regular and ongoing inspections to ensure fish health and the integrity of the enclosures. According to the Food and Agriculture Organization of the United Nations, by the year 2050, there will be nearly 2 billion more humans populating the earth. Meaning that we will need to produce ...


    By Deep Trekker Inc.

  • The improvement of livelihood and rural development by the exotic Pangasiid catfish farming in Bangladesh

    A study was conducted to improve the livelihood and rural development by the catfish (Pangasius hypophthalmus) farming in Mymensingh district in Bangladesh from April 2005 to March 2006 using Participatory Rural Appraisal (PRA) tools. A total of 117 respondents were randomly chosen, among them 7 hatchery owners, 20 nursery pond owners, 20 fingerling traders, 30 Pangus farmers, 40 market ...


    By Inderscience Publishers

  • 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 ...


    By Earth Policy Institute

  • Building a filter defense against Zebra and Quagga mussles

    Tiny mussels can create massive problems for intake structures, vaLves, pumps, screens and other water infrastructure around the US. Some filtration systems can provide chemical-free protection against invasive zebra and quagga mussels, but it is vital to understand the problem and develop the right system to avoid being overrun by the alien species. Zebra mussels (Dreissena polymorpha) and their ...

  • 9 images of climate impacts and adaptation in the Pacific Northwest

    Residents of the Pacific Northwest begrudgingly refer to the month of June as “June-uary,” a reference to the fact that the wet weather can often make it feel like midwinter. But this past June, Seattle had less rain than Phoenix. Even more significant is that last winter there was very little snow. That’s especially important for the Pacific Northwest, one of the few parts of ...


    By Ensia

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