Academic
Publications
Modelling the effects of Marine Protected Areas (MPAs) on the southern rock lobster (Jasus edwardsii) fishery of Victoria, Australia

Modelling the effects of Marine Protected Areas (MPAs) on the southern rock lobster (Jasus edwardsii) fishery of Victoria, Australia,10.1080/00288330.

Modelling the effects of Marine Protected Areas (MPAs) on the southern rock lobster (Jasus edwardsii) fishery of Victoria, Australia   (Citations: 7)
BibTex | RIS | RefWorks Download
Since 2002, 5.3% of the Victorian coastal waters have been declared as Marine Protected Areas (MPAs). These are aimed at safeguarding important marine habitats and species, significant natural features, and areas of cultural heritage and aesthetic value. However, MPAs impact the fishery for southern rock lobster (Jasus edwardsii), as total allowable catches (TACs) were previously set to allow the biomass to recover to pre‐specified target levels. The model on which assessments and risk analyses are based is extended to include the impact of MPAs. The MPAs and the area open to fishing are modelled as subpopulations with different levels of mortality and consequently different density and population size‐structure. A range for the probability of a lobster moving from a MPA to the fished area from 0 to 15% is considered, based on the results of tagging studies. The reduction of biomass available to the commercial fishery because of the introduction of MPAs is estimated to be 8% and 16% (Western and Eastern Zones) respectively. The results of a risk assessment show that if the current TACs are maintained, the time to increase the biomass available to the commercial fishery by 50% would be delayed 5–9 years in the Western Zone and 1–4 years in the Eastern Zone because of the impact of displaced effort. In contrast, spawning biomass in the Eastern Zone is currently below the agreed limit reference point, and the introduction of MPAs would enhance the rate of recovery, although only marginally initially, faster than the absence of the MPAs.
Cumulative Annual
View Publication
The following links allow you to view full publications. These links are maintained by other sources not affiliated with Microsoft Academic Search.
    • ...is positive or negative depends on the spatial dynamics of reproduction (Tuck and Possingham 2000), density dependence (Sa ´nchez Lizaso et al. 2000), movement (McGarvey 2004; Hobday et al. 2005), and other spatially variable trophic or habitat interactions...

    Richard McGarveyet al. Estimating historical commercial rock lobster ( Jasus edwardsii ) catc...

    • ...Modelling by Hobday et al. (2005) indicated that displacement of fishing effort from closed areas was likely to delay the recovery of depleted Jasus edwardsii biomass in coastal waters of Victoria, Australia...

    I. Philip Smithet al. Dynamics of closed areas in Norway lobster fisheries

    • ...For example, Hobday et al. (2005) evaluated the impact of MPAs established for habitat and biodiversity conservation on the recovery of rock lobster in the coastal waters of Victoria, Australia, and found that while MPAs would likely enhance the rate of recovery, they would also be likely to delay the recovery of the exploitable biomass in the areas open to fishing, because of the loss of fishable area...
    • ...This has been widely demonstrated in a number of studies of both fishes (Johnson et al. 1999; McClanahan and Mangi 2000; Russ et al. 2003; Willis et al. 2003) and invertebrates (Cox and Hunt 2005; Hobday et al. 2005; Gon˜i et al. 2006)...

    John C. Fieldet al. Does MPA mean 'Major Problem for Assessments'? Considering the consequ...

Sort by: