23028 version 2
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Describe and perform catch assessment calculations for a netted catch
on a commercial seafood vessel
Level
4
Credits
7
Purpose
People credited with this unit standard are able to describe and perform the
calculation for, on a commercial seafood vessel, an estimate of the: volume
of catch within a trawl net; volume of catch within holding bins; density of fish
in a catch from a sample; catch composition in terms of volume percentage
of each species within a representative sample of a catch; and the
greenweight of each species within a catch.
Subfield
Seafood
Domain
Seafood Vessel Operations
Status
Registered
Status date
16 October 2009
Date version published
16 October 2009
Planned review date
31 December 2014
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
Primary Industry Training Organisation
Accreditation and Moderation Action Plan (AMAP) reference
0123
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Holding bin means any container, receptacle or pound where fish may be held, and
whose volume may be calculated.
2
It is not expected that candidates will know all formulae required, and the assessor is
required to have them available.
 New Zealand Qualifications Authority 2016
23028 version 2
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Elements and performance criteria
Element 1
Describe and perform the calculation for the estimated volume of catch within a trawl net
on a commercial seafood vessel.
Performance criteria
1.1
Description and calculation are consistent with the diameter of the fish filled
section of the net.
Range
from the net plan, from measurements.
1.2
Description and calculation are consistent with the becket count and becket
height in the fish filled section of the net.
1.3
Description and calculation are consistent with the shape of the fish filled
section of the net, and formulae for the calculation of the volumes of spheres,
truncated cones and cylinders.
1.4
Description and calculation produces estimate of catch in the water, and catch
on deck.
Element 2
Describe and perform the calculation for the estimated volume of catch within holding bins
on a commercial seafood vessel.
Performance criteria
2.1
Description and calculation are consistent with the cross sectional area of the
holding bins.
2.2
Description and calculation are consistent with the height of the fish in the
holding bins.
2.3
Description and calculation are consistent with the shape of the holding bins,
and formulae for the calculation of the volumes of cuboids and trapezoids.
Element 3
Describe and perform the calculation for the estimated density of fish in a catch from a
sample on a commercial seafood vessel.
Performance criteria
3.1
Description and calculation are consistent with the measured volume and mass
of a random sample.
 New Zealand Qualifications Authority 2016
23028 version 2
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3.2
Description and calculation are consistent with formulae for the calculation of
density.
Element 4
Describe and perform the calculation for the estimated catch composition in terms of
volume percentage of each species within a representative sample of a catch on a
commercial seafood vessel.
Range
a minimum of five species present in the catch.
Performance criteria
4.1
Description and calculation are consistent with the number of fish of each
species identified within the sample.
4.2
Description and calculation are consistent with the size factor of each species
identified within the sample.
4.3
Description and calculation are consistent with formulae for the calculation of
volume percentages from species numbers and size factors.
Element 5
Describe and perform the calculation for the estimated greenweight of each species within
a catch on a commercial seafood vessel.
Performance criteria
5.1
Description and calculation are consistent with the estimated catch weight.
5.2
Description and calculation are consistent with the estimated catch composition.
5.3
Description and calculation produce an estimated greenweight for each species
identified within the catch.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
 New Zealand Qualifications Authority 2016
23028 version 2
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Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the Primary Industry Training Organisation standards@primaryito.ac.nz if
you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016