Trawl survey of hoki, hake, and ling in the Southland and Sub-Antarctic areas, November- December 2006 (TAN0617).

By: O'Driscoll, R. L.
Contributor(s): Bagley, N.W. (NIWA. Wellington).
Material type: materialTypeLabelBookSeries: New Zealand fisheries assessment report ; 2008/30.Publisher: Wellington, N.Z. : Ministry of Fisheries, 2008Description: 61 p. : ill., maps. ; 30 cm.ISSN: 1175-1584.Subject(s): FISHERIES | FISHERY DATA | HAKE | HOKI | LING | SOUTHERN OCEAN | SOUTHLAND | STOCK ASSESSMENT | SUBANTARCTIC REGIONSOnline resources: Click here to access online In: New Zealand fisheries assessment reportSummary: The tenth Tangaroa summer trawl survey of the Southland and Sub-Antarctic areas was carried out 110m 24 November to 23 December 2006. Ninety-one trawls were successfully completed in 20 strata. Biomass estimates (and c.v.s) for all strata were 14 747 t (11%) for hoki, 19 661 t (12%) for ling, and 1588 t (17%) for bake. The biomass estimate for hoki in 2006 was 28% lower than in 2005, and the second lowest in the time series (after 2003). Hoki biomass is currently less than 20% of the biomass observed in the Sub-Antarctic in the early 1990s. Biomass estimates for bake and ling in 2006 were almost the same as in 2005, but both species have declined since the resumption of the summer trawl swveys in 2000 and are currently at the lowest levels in either the summer or autumn trawl time series.
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Item type Current location Call number Copy number Status Date due Barcode
JOURNAL JOURNAL WELLINGTON
JOURNALS
NO. 2008/30 1 Available J09559

Includes bibliographical references (p.13-14).

The tenth Tangaroa summer trawl survey of the Southland and Sub-Antarctic areas was carried out 110m 24 November to 23 December 2006. Ninety-one trawls were successfully completed in 20 strata. Biomass estimates (and c.v.s) for all strata were 14 747 t (11%) for hoki, 19 661 t (12%) for ling, and 1588 t (17%) for bake. The biomass estimate for hoki in 2006 was 28% lower than in 2005, and the second lowest in the time series (after 2003). Hoki biomass is currently less than 20% of the biomass observed in the Sub-Antarctic in the early 1990s. Biomass estimates for bake and ling in 2006 were almost the same as in 2005, but both species have declined since the resumption of the summer trawl swveys in 2000 and are currently at the lowest levels in either the summer or autumn trawl time series.

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