Fisheries Infosite

FAR 2018/06 - Relative abundance, size and age structure, and stock status of blue cod off Kaikoura and north Canterbury in 2011โ€“12. Comparisons of potting survey designs and estimates of pot catchability and size selectivity.

Filename
FAR-2018-06-BCO3-North-Canterbury.pdf

Link to file
FAR-2018-06-BCO3-North-Canterbury.pdf (4.6 MB)

Abstract
Third fixed, first random site potting surveys in the time series. Eighty-eight sites surveyed, 6 pots per site, 528 pot lifts. Pot catch weighed, length and sex of blue cod recorded. Otoliths age-length keys applied to the scaled length frequency distributions to estimate population age structures. Estimates of  Z and F%SPR indicate spawning biomass has been reduced to 52% in Kaikoura and 44-45% in Motanau. Density estimates from video transects had only a poor relationship with pot catches.

Document date
Thursday, 14 June 2018
Document type
V 1.3
File format
Adobe PDF
File size
4.6 MB
Reference number
978-1-77665-835-0
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Uploaded from
FAR-2018-06-BCO3-North-Canterbury.pdf

Uploaded date
Thursday, 14 June 2018

Search tags
Species: BCO;
Author: Carbines G.; Haist V.;

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