Relative abundance, population structure, and stock status of blue cod off north Otago in 2013. Concurrent fixed and random site potting surveys / G. Carbines, V. Haist.

By: Carbines, Glen D. (Glen David), 1968- [author.].
Contributor(s): Haist, Vivian [author.] | New Zealand. Ministry for Primary Industries [issuing body.].
Material type: materialTypeLabelBookSeries: New Zealand Fisheries assessment report: 2018/07.Publisher: Wellington : Ministry for Primary Industries, 2018.Description: 1 online resource : colour illustrations.ISBN: 9781776658367 (online).Subject(s): PARAPERCIS COLIAS | BLUE COD | COD | FISHERIES | STATISTICS | NEW ZEALAND | NORTH OTAGO | FISH STOCK ASSESSMENT | FISH POPULATIONSHoldings: ELECTRONIC Online resources: FAR 2018/07 Fisheries Infosite | Relative abundance, population structure, and stock status of blue cod off north Otago in 2013. Concurrent fixed and random site potting surveys NIWA document server Summary: Third fixed and first random site potting surveys in north Otago time series. Twenty-seven fixed and 40 random sites surveyed (6 pots per site, 402 pot lifts) from 4 coastal and 2 offshore strata. Pot catch weighed, length and sex of blue cod recorded. Otoliths from random and fixed sites produced age-length keys applied to the scaled length frequency distributions to estimate the population age structures. Estimates of Z and F%SPR indicate that spawning biomass has been reduced to 34-36%.
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"May 2018".

Includes bibliographical references.

Third fixed and first random site potting surveys in north Otago time series. Twenty-seven fixed and 40 random sites surveyed (6 pots per site, 402 pot lifts) from 4 coastal and 2 offshore strata. Pot catch weighed, length and sex of blue cod recorded. Otoliths from random and fixed sites produced age-length keys applied to the scaled length frequency distributions to estimate the population age structures. Estimates of Z and F%SPR indicate that spawning biomass has been reduced to 34-36%.

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