Abstract
In quota-managed fisheries in which harvestable mass of individuals varies seasonally, harvesting can be tailored either to reduce exploitation rates without lowering quota or to increase catch limits without raising the fisheries' risk profile. Using data from the South Australian greenlip abalone (Haliotis laevigata) fishery, we demonstrate that changing harvesting from summer to autumn would allow either (1) a 13% reduction in the number of abalone harvested for the same quota, thereby reducing fishing mortality; or (2) a 13% increase in the landed weight of catch (16.5% increase in revenue) while leaving the number and mean length of individuals harvested unchanged. These benefits accrue because (1) the landed weight-to-length ratio is greater in autumn and (2) heavier abalone are more valuable. Consequently, changing the seasonal timing of harvest can serve to increase landed revenue, reduce exploitation rate, or achieve a combination of these 2 management objectives.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
