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Trawl survey of oreos and orange roughy on the south Chatham Rise, October-November 1993 (TAN9309)

By: McMillan, P.J. (NIWA. Wellington).
Contributor(s): Hart, A.C. (NIWA. Wellington) | NIWA Wellington (N.Z.).
Material type: materialTypeLabelBookSeries: New Zealand fisheries data report ; 60.Publisher: Wellington, NZ : NIWA, 1995Description: 12 p.ISBN: 0478046456.Subject(s): TRAWLING | FISHERY SURVEYS | ORANGE ROUGHY | BLACK OREOS | CHATHAM RISE | FISHERY RESOURCES | SMOOTH OREOS | STOCK ASSESSMENT
Incomplete contents:
This report describes the third in a series of trawl surveys of deepwater fish on the south Chatham Rise carried out using GRV #Tangaroa# in October and November 1993. The survey was carried out in October-November because black oreo and smooth oreo are then at, or near, spawning and biological information associated with spawning can be collected, eg. length at maturity. The principal aim of the survey is to estimate the relative biomass of black oreo (#Allocyttus niger#), smooth oreo (#Pseudocyttus maculatus#), and orange roughy (#Hoplostethus atlanticus#) on the south Chatham Rise. Relative biomass is required for stock assessment of these species from the area. This "high catch rate area" survey, sampled two strata at the western end of the Chatham Rise. Analysis of the oreo commercial catch and effort data showed that these areas (strata) had provided high catch rates in the past. The high catch rate area survey aimed to determine if there was a problem with the standard survey design by sampling areas of high commercial catch rate with an additional 20 stations.
In: New Zealand fisheries data report In: New Zealand fisheries data report
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Item type Current location Call number Copy number Status Date due Barcode
JOURNAL JOURNAL WELLINGTON
STACK
NO. 60 1995 1 Available J010178
JOURNAL JOURNAL WELLINGTON
STACK
NO. 60 1995 2 Available J010179

5 refs; 8 figs; 19 tables; 5 appendices

This report describes the third in a series of trawl surveys of deepwater fish on the south Chatham Rise carried out using GRV #Tangaroa# in October and November 1993. The survey was carried out in October-November because black oreo and smooth oreo are then at, or near, spawning and biological information associated with spawning can be collected, eg. length at maturity. The principal aim of the survey is to estimate the relative biomass of black oreo (#Allocyttus niger#), smooth oreo (#Pseudocyttus maculatus#), and orange roughy (#Hoplostethus atlanticus#) on the south Chatham Rise. Relative biomass is required for stock assessment of these species from the area. This "high catch rate area" survey, sampled two strata at the western end of the Chatham Rise. Analysis of the oreo commercial catch and effort data showed that these areas (strata) had provided high catch rates in the past. The high catch rate area survey aimed to determine if there was a problem with the standard survey design by sampling areas of high commercial catch rate with an additional 20 stations.

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