A. Species

Scientific name: Lamna nasus

Common name(s): Porbeagle shark

Global IUCN Red List Threat Status: Vulnerable

B. Location of use

Geographic location(s):

• New Zealand
• Pacific - southwest

Country/Region:

C. Scale of assessment

Scale of assessment: National Level

Name/Details of location: Waters under New Zealand jurisdiction

D. Timescale of use

Start Year: 1997

End Year: 2013

E. Information about the use

How is the wild species sourced?: Wild species sourced from its natural habitat

Type of use: Extractive

Practice of use: Targeted fishing harvesting/exploiting or collecting wild aquatic resources

Lethal or non-lethal: Lethal

Does this use involve take/extraction of: The whole entire organism

Purpose(s) of end use: Food and feed

Motivation of use: Largescale commercial exploitation for trade

Is this use legal or illegal?: Some use is legal and some is illegal

F. Information about the Users

Which stakeholder(s) does the record primarily focus on?: National / local government, National / local private sector and International private sector

G. Information about the sustainability of use

Is there evidence that the use is having an impact on the target species?: Wild species sourced from its natural habitat

Has an assessment (or judgement) of sustainability of the use of the target species from an ecological perspective been recorded?: Yes, considered sustainable

Has an assessment (or judgement) of sustainability of the use of the target species from an economic perspective been recorded?: not recorded

Has an assessment (or judgement) of sustainability of the use of the target species from a social perspective been recorded?: not recorded

Has an assessment (or judgement) of sustainability of the use of the target species from a human health perspective been recorded?: not recorded

Has an assessment (or judgement) of sustainability of the use of the target species from an animal health/welfare perspective been recorded?: not recorded

Recommendations provided in the record to maintain or enhance the sustainability of the use of the target species

Recommendations to improve the NDF process: 1. Species-specific data continue to be collected on fishing effort; the number, weight, sex, age, total fork length of all porbeagle landed, and those discarded alive or dead. 2. The recreational and customary take under the QMS is estimated through survey of recreational and customary fishers. 3. Increase observer coverage of domestic longline vessels midwater trawl vessels and New Zealand-flagged high seas vessels, especially those operating in areas where porbeagle are often caught. 4. The type of indicator-based analysis performed by Francis et al (2014) should be repeated at 3-5 yearly intervals, and the models improved with more data and testing. Once sufficient data are available, a quantitative stock assessment should be made in conjunction with other countries in the region. 5. Given the increasing proportional importance of bycatch of porbeagle in midwater trawl and bottom longline fisheries, a similar analysis of those porbeagle catches should be conducted. 6. Review, research and implement best practice mitigation methods to minimise captures of porbeagle in each fishery. 7. Research, develop and implement specific methods for handling and releasing porbeagles, and investigate the fate of live discards by tagging a sample from different fisheries, including recreational and customary fisheries. 8. The volumes of porbeagle product introduced from the high seas to New Zealand be monitored closely, and expert advice be sought before the 4 tonne (greenweight or equivalent greenweight estimates using the current porbeagle conversion multipliers of 108 for dried fins and 45 for wet fins) limit above is allowed to be exceeded. 9. New Zealand collaborates with Oceania neighbours, and especially with WCPFC, to better understand the movements and population dynamics of porbeagle moving in and out of the New Zealand EEZ, and especially into other national fishing jurisdictions. At present there is doubt that porbeagle are actually caught in other Pacific fisheries apart from Australia. If necessary, WCPFC establish regional quota to cover the take of porbeagle on the high seas.

Record source

Information about the record source: scientific_pub

Date of publication/issue/production: 2018-01-01T00:00:00+0000

Source Reference(s):

Date of record entry: 2023-09-14