FantasticSearch

GUIDELINES FOR ESTIMATING THE GREEN WEIGHT OF KRILL CAUGHT Observation steps and frequency Holding tank volume At the start of fishing Measure the width and length of the holding tank (if the tank is not rectangular in shape, then additional measurements may be required; precision ± 0,05 m) Every month () Estimate the volume-to-mass conversion derived from the drained mass of krill in a known volume (e.g. 10 litres) taken from the holding tank Every haul Measure the depth of krill in the tank (if krill are held in the tank between hauls, then measure the difference in depth; precision ± 0,1 m) Estimate the green weight of krill caught (using equation) Flow meter Prior to fishing Ensure that the flow meter is measuring whole krill (i.e. prior to processing) Every month Estimate the volume-to-mass conversion (ρ) derived from the drained mass of krill in a known volume (e.g. 10 litres) taken from the flow meter Every haul () Obtain a sample from the flow meter and: measure the volume (e.g. 10 litres) of krill and water combined estimate the flow meter volume correction derived from the drained volume of krill Estimate the green weight of krill caught (using equation) Flow scale

Prior to fishing Ensure that the flow scale is measuring whole krill (i.e. prior to processing) Every haul Obtain a sample from the flow scale and: measure the mass of krill and water combined estimate the flow scale mass correction derived from the drained mass of krill Estimate the green weight of krill caught (using equation) Plate tray Prior to fishing Measure the mass of the tray (if trays vary in design, then measure the mass of each type; precision ± 0,1 kg) Every haul Measure the mass of krill and tray combined (precision ± 0,1 kg) Count the number of trays used (if trays vary in design, then count the number of trays of each type) Estimate the green weight of krill caught (using equation) Meal conversion Every month Estimate the meal to whole krill conversion by processing 1 000 to 5 000 kg (drained mass) of whole krill Every haul Measure the mass of meal produced Estimate the green weight of krill caught (using equation) Codend volume At the start of fishing Measure the width and height of the codend (precision ± 0,1 m) Every month Estimate the volume-to-mass conversion derived from the drained mass of krill in a known volume (e.g. 10 litres) taken from the codend

Every haul Measure the length of codend containing krill (precision ± 0,1 m) Estimate the green weight of krill caught (using equation)