- Title
- Biological evaluation of an existing spatial management network for an exploited penaeid species
- Creator
- Taylor, Matthew D.; Hale, Darren; Johnson, Daniel D.
- Relation
- Regional Studies in Marine Science Vol. 47, no. 101924
- Publisher Link
- http://dx.doi.org/10.1016/j.rsma.2021.101924
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2021
- Description
- Spatial management may be employed to achieve objectives aimed at maintaining or enhancing productivity and sustainability of exploited populations. Spatial management is used in penaeid fisheries to alter the spatiotemporal distribution of fishing effort to achieve outcomes such as avoidance of undesirable size-classes. Eastern King Prawn (Penaeus [melicertus] plebejus; EKP) is a valuable penaeid species for which harvest is supported by an extensive spatial management network, however these closures have never been evaluated. We examine temporal variation in biomass and size structures within three trawl closure areas spanning four degrees of latitude. There was substantial spatial variation in EKP biomass among locations, fished and non-fished zones and sampling periods, which appeared to be influenced by depth, temperature and distance to the adjacent estuarine nursery. Size structure varied among locations and sampling periods, and differed inside and outside of closure areas, however in many cases the majority of prawns that were protected within closure areas were consistently smaller than the estimated size at first capture for optimal yield per recruit. The data suggest that the closures are likely to be effective at achieving their objective, but there may be some scope for adaptive management.
- Subject
- yield per recruit; fisheries management; adaptive management; discards; penaeidae; closure; trawl
- Identifier
- http://hdl.handle.net/1959.13/1447320
- Identifier
- uon:43117
- Identifier
- ISSN:2352-4855
- Language
- eng
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