Journal article
Stock assessment of school shark, Galeorhinus galeus, based on a spatially explicit population dynamics model
Marine and Freshwater Research, Vol.51(3), pp.205-220
2000
Abstract
The school shark (Galeorhinus galeus) resource off southern Australia is assessed by use of an assessment approach that takes account of the spatial structure of the population. The population dynamics model underlying the assessment considers the spatial as well as the age-specific characteristics of school shark. It allows for a series of fisheries (each based on a different gear type), explicitly models the pupping/recruitment process, and allows for multiple stocks. The values for the parameters of this model are determined by fitting it to catch-rate data and information from tagging studies. The point estimates of the pup production at the start of 1997 range from 12% to 18% of the pre-exploitation equilibrium size, depending on the specifications of the assessment. Allowing for spatial structure and incorporating tag release–recapture data lead to reduced uncertainty compared with earlier assessments. The status of the resource, as reflected by the ratio of present to virgin pup production and total (1+) biomass, is sensitive to the assumed level of movement between the stocks in New Zealand and those in Australia, with lower values corresponding to higher levels of movement.
Details
- Title
- Stock assessment of school shark, Galeorhinus galeus, based on a spatially explicit population dynamics model
- Authors/Creators
- A.E. Punt (Author/Creator)F. Pribac (Author/Creator)T.I. Walker (Author/Creator)B.L. Taylor (Author/Creator)J.D. Prince (Author/Creator)
- Publication Details
- Marine and Freshwater Research, Vol.51(3), pp.205-220
- Publisher
- CSIRO Publishing
- Identifiers
- 991005544746807891
- Copyright
- © CSIRO 2000
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Metrics
49 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.2 Marine Biology
- 3.2.92 Fisheries Ecology
- Web Of Science research areas
- Fisheries
- Limnology
- Marine & Freshwater Biology
- Oceanography
- ESI research areas
- Plant & Animal Science