photo of tiger prawns

© Craig Jewell | dreamstime.com

tiger prawns

In the northern Australia fishery, tiger prawns are graded at sea into two sizes of pack: small packs (3 kilograms) and large packs (weight varies between 12 and 15 kilograms).  The grades (by count) offered in each type of package are shown in the table.

Grade
(prawns
per lb.)
Carapace
length
(millimeters)
Small
pack
Large
pack
<6 >46 yes yes
6 – 8 46 – 42 yes yes
<10 >39 no yes
9 – 12 41 – 36 yes yes
10 – 15 38 – 33 no yes
13 – 15 35 – 33 yes yes
16 – 20 32 – 30 yes yes
10 – 20 38 – 30 no yes
>20 <29 yes no
21 – 25 29 – 28 no yes
26 – 30 27 – 26 no yes
21 – 30 29 – 26 no yes

Data from:
Michael F. O'Neill, David J. Die, Brian R. Taylor and Malcolm J. Faddy.
Accuracy of at-sea commercial size grading of tiger prawns (Penaeus esculentus and P. semisulcatus) in the Australian northern prawn fishery.
Fishery Bulletin, vol. 97, number 2 (1999).

Pages 396-401.  On web at http://fishbull.noaa.gov/18oneill.pdf

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