Acronym NA
Category
Aquaculture
Title Teknologiutvikling for fangst, håndtering og føring i fangstbasert akvakultur: Hovedprosjekt - Technology development for capture, handling and guidance in capture-based aquaculture: Main project Programme National Programme
Instrument (FP6)
Contact Type (FP7)
Strand (Interreg)
NA
Theme (FP7)
Activity Area (FP6)
Regional Area (Interreg)
Action (COST)
NA
Specific Programme (FP7)
NA
Funding source National Coordinator Odd-Børre Humborstad Coordinator email odd-boerre.humborstad@imr.no
Coordinator institution
IMR - Institute of Marine Research (Norway)
Institutions involved
NOFIMA - Norwegian Institute of Food, Fisheries and Aquaculture Research (Norway) ,
NA - SINTEF Ocean (Norway) ,
Start year 2009 End year 2013 Funding (€) € 848,562 Website https://www.fhf.no/prosjekter/prosjektbasen/900293/ Summary "The main scope of the project was to provide a knowledge base so that catch-based aquaculture (FBA) can be further developed as a sustainable industry, through technology development for catching, handling and keeping live fish, with an emphasis on profitability and fish welfare.
Specific objectives were:
• To evaluate and develop methods for landing and moving cod: existing and new technology (Nofima).
• To evaluate the transport phase for cod, including monitoring of fish condition, monitoring and requirements for the environment, and development/testing of alternative guide tank design (Marine Research Institute).
• To evaluate and develop vessel design for catching and handling live fish for the coastal fleet (SINTEF).
• To develop twin seine weirs and seines for increased landing of live cod.
With regards to the comparison of bagging and pumping as a boarding method for live cod the experiments showed that under conditions of good conditions for live capture and good sorting, there is little that distinguishes the two boarding methods in degree of fatigue, injuries, survival and healing on cod. Observed differences were not unambiguous in the direction of one of the methods, and neither on injury, physiology or mortality there were alarmingly high levels. The experiments, especially on physiology side, show that the breadth of variation is naturally large. The boarding methods were not different in terms of fish welfare, and the choice of method can be made for other reasons. Misalignment of pumps during emptying of transport tanks can cause crushing injuries regardless of boarding method. It is recommended to take a closer look at water quality during emptying of rooms, and that receiving bins, gutters and the like are to a greater extent designed for efficient sorting. A cruise was carried out with the spinner vessel ""Bernt Oskar"" in 2012 to investigate critical oxygen saturation for stressed fish and the effect of oxygenation on recovery. It was not found elevated critical oxygen saturation values or change in oxygen consumption over time shortly thereafter catching. Both results were somewhat unexpected, but are explained from moderate to slightly stressed fish in the experiments. The experiments also showed that low water flow and low oxygen levels gave equal good recovery as oxygenated groups with high water flow. That fish in ours attempts were little stressed is somewhat atypical, but explained by the large availability of fish and correspondingly short hall with little exhausting swimming. No negative effects of oxygenation were observed. A combination with the addition of oxygen can be recommended in addition to ordinary water supply, e.g. in cases of rapidly declining or persistently low oxygen levels. Given the experimental limitations of field trials over which one has little control stress levels and correspondingly large range of variation, it will be necessary to repeat experiments under more controlled conditions in the lab. Since no clear boundaries were found in this experiment, but in the past have found indications of problems with oxygen uptake in newly caught fish at 70% saturation, it is still recommended to have high saturation in the first hours after capture."
Keywords
Gear technology;
Engineering;
Capture-based aquaculture;
Vessel technology;
Fishing technology;
Fish;
Animal welfare;
Cod;
Marine Region
76
Not associated to marine areas
0
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