Fish Handling Articles

  • Prevent Fish Kill in the Spring

    Pond Deicing Can Help Prevent Fish Kill Keeping the pond open will help keep oxygen in the water, attract water fowl and help prevent fish kills in the spring. The most common cause of fish kills is suffocation due to lack of dissolved oxygen. Most dissolved oxygen is produced by algae and aquatic plants through photosynthesis. A lesser but also important source of oxygen in water ...


    By Keeton Industries, Inc.

  • Samson Pumps match the strict demands of the fishing industry - Case Study

    "Samson pumps are far more robust and reliable than other pumps on the market. This is particularly important for the fishing industry," says Søren Toft Sørensen from Beva Special Svejs ApS, which specialises in the repair and servicing of large fishing vessels "It is a solid product. A really solid product, actually. The more I see what else there is on the pump market, the more ...


    By Samson Pumps A/S

  • Reliable pumps are the be-all and end-all - Case Study

    "The introduction of the vacuum system is the biggest positive change that has taken place in the fishing industry in all the years I have been a fisherman," says Roi Magnussen, chief engineer and co-owner of "H265 Asbjørn", which is one of Denmark's largest and most modern fishing vessels When "H265 Asbjørn" was built in 2008 – then under the name of "Gitte Henning" – ...


    By Samson Pumps A/S

  • Liquid ring pumps is the heart for conveying fish - Case Study

    Liquid ring pumps are real survivors. Fish Processors would be hard pressed to live without them. With other forms of vacuum pumps being made, Liquid Ring vacuum pumps have proven to be the most reliable. Statement by Jon Ellison Project Manager at Marel, Seattle USA With many years of experience designing and building fish processing systems I can tell you that Liquid Ring Vacuum Pumps have been ...


    By Samson Pumps A/S

  • Travelling the world to install vacuum pumps in the fishing industry - Case Study

    Travelling the world to install vacuum pumps in the fishing industry A senior supervisor at Havyard/MMC, Asbjørn travels as much as 200 days a year. It is a requirement from nearly all ship owners and shipyards that only pumps from Samson Pumps in Denmark be installed in their ships Meet Asbjørn Tråseth Aged 41, married and father of two children – a ...


    By Samson Pumps A/S

  • Corrosion In Perishables Containers

    The presence of corrosive gases inside containers used for transporting perishables can quickly cause chemical reactions within the metals, producing corrosion - even at very low concentrations (ppm). The main corrosive gases involved are acid ...


    By Bioconservacion SA

  • Toxicokinetics of perfluorooctane sulfonate (PFOS) in rainbow trout (Oncorhynchus mykiss)

    Rainbow trout (Oncorhynchus mykiss) confined to respirometer‐metabolism chambers were dosed with perfluorooctane sulfonate (PFOS) by intra‐arterial injection and sampled to obtain concentration time‐course data for plasma, and either urine or expired water. The data were then analyzed using a two‐compartment clearance‐volume model. Renal and branchial clearance rates (CLR and CLB; mL/d/kg) ...


    By John Wiley & Sons, Ltd.

  • Modeling fish production for Southern California's petroleum platforms

    California's oil platforms are nearing the end of their productive lives, and therefore will be decommissioned in the near future. These structures have been shown to be important habitat for both settlement and growth for reef fishes. Important information on the biological effects (i.e. loss of biomass and production) of different decommissioning options has not yet been explored in detail. ...


    By John Wiley & Sons, Ltd.

  • Spatio-temporal variability in the thermal regimes of the Danjiangkou reservoir and its downstream river due to the large water diversion project system in central China

    Understanding water temperature variation in regulated rivers and reservoirs becomes increasingly important as the environment and ecosystem are approaching their thermal limits. In this paper, a multi-model approach is used to quantitatively access the spatio-temporal change in thermal structures of the Danjiangkou reservoir and its downstream river. The area is subject to thermal and ...


    By IWA Publishing

  • Bisphenol A reduces fertilizing ability and motility by compromising mitochondrial function of sperm

    Bisphenol A acts as an endocrine disruptor, affects animal reproductive success in vivo, and affects sperm functions in vitro at environmentally relevant concentrations leading to reduction in sperm motility and fertilizing ability in fish. The effect of in vitro BPA on avian sperm functions has not been explored. We tested the effect of environmentally relevant concentrations of BPA (0, 0.18, ...


    By John Wiley & Sons, Ltd.

  • We only have one Earth, so we better start taking care of it.

    Clocks are ticking, and the only planet we have to live on is changing right before our eyes. What are we going to do about it? We are all connected. Farmer or finance minister, president or plumber, we share the same home — this single, living planet. It’s the only home we have. And from my perspective it’s in dire need of attention. ...


    By Ensia

  • Stop and Smell the Coral

    Marine protected areas are a popular way to try and combat the massive decline of coral reefs around the world, in part due to overfishing. But, what if, once damaged, the fish and coral you need to make the area healthy again don’t want to move back in? Turns out you might be left with a seaweed protected area. In a study published today in ...


    By Ensia

  • Trip generation and modal choice among commuters of road and water transport in Nigerian coastal communities

    This study analysed trip–making behaviour in the riverine communities of Ondo State, Nigeria. The number and purposes of trips made for one week and factors influencing commuters' mode choice were examined. 240 household heads, proportionally–selected from 13 communities were sampled. Results showed that 2,337 trips were generated per week, with 1,638 trips by water transport and 699 by road, ...


    By Inderscience Publishers

  • The disappearing rivers of Bangladesh

    Bangladesh is a land of rivers, but changing climate has caused a third of the country’s more than 300 large rivers to disappear. The rivers are drying out as a result of barriers built upstream to divert water and protect people from floods that have become more frequent as the weather becomes more ...


    By SciDev.Net

  • Moving Up the Food Chain

    For most of the time that human beings have walked the earth, we lived as hunter-gatherers. The share of the human diet that came from hunting versus gathering varied with geographic location, hunting skills, and the season of the year. During the northern hemisphere winter, for instance, when there was little food to gather, people there depended heavily on hunting for survival. Our long history ...


    By Earth Policy Institute

  • Trophic dynamics of hexabromocyclododecane diastereomers and enantiomers in fish in a laboratory feeding study

    The in laboratory trophic transfer of hexabromocyclododecanes (HBCDs) was studied using predatory (oscar) fish and a prey species (tiger barb) exposed to a technical HBCD. Gut absorption, dynamic changes of diastereomer pattern and enantiomer fractions (EFs), and potential metabolism of HBCDs were examined. Compared to β‐ or γ‐HBCD, α‐HBCD showed lower absorption efficiency in oscar gut. A ...


    By John Wiley & Sons, Ltd.

  • Application of mercury isotopes for tracing trophic transfer and internal distribution of mercury in marine fish feeding experiments

    We performed feeding experiments to investigate mercury (Hg) isotope fractionation during trophic transfer and internal distribution of total Hg (THg) in marine fish upon exposure to natural seafood. Young‐of‐the‐year amberjack (Seriola dumerili) were fed with either blackfin tuna (Thunnus atlanticus) (2647 ng/g THg) or brown shrimp (Farfantepenaeus aztecus) (25.1 ng/g THg) for 80 and 50‐days, ...


    By John Wiley & Sons, Ltd.

  • Invasive dreissenid mussels and round gobies: A benthic pathway for the trophic transfer of microcystin

    In this preliminary study, we identify two pathways through which invasive dreissenid mussels can transfer microcystin to higher trophic levels: either directly, through consumption by benthivorous fish such as the round goby; or indirectly, through their biodeposits which are an important food source for benthic invertebrates. Our results suggest that dreissenid mussels represent a ...


    By John Wiley & Sons, Ltd.

  • 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 ...


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