Area-based management is an important tool to improve integrated conservation of high seas biodiversity. While States clearly support the need to protect high seas biodiversity, some States remain reluctant to adopt internationally binding measures that may have an impact on high seas freedoms. Since there is limited experience to date with the application of area-based management tools on the high seas, this article examines the practical implications of establishing such measures through an analysis of the International Maritime Organization's (IMO) particularly sensitive sea area concept. After providing an overview of the legal complexities associated with the designation of high seas marine protected areas, this article introduces the PSSA concept and identifies the unique features that make it appropriate as a measure for protecting high seas biodiversity. The core of the analysis is an examination of State practice within the IMO in the context of the potential designation of a PSSA in the Southern Ocean.

Recreational anglers were interviewed in the Blackwood Estuary, Western Australia, to ascertain demographics, spatial and temporal patterns of use, expenditures, and attitudes to conservation and fisheries management. Although almost half of the angling groups encountered were tourist families staying in caravan parks, most anglers were male, 31-45 years old, with relaxation as the primary motive for fishing. On average, boat-based anglers fished more frequently than shore-based anglers and locals fished more frequently in the Blackwood Estuary than tourists. Expenditures by anglers on bait, tackle, and capital equipment were considerable. Although support for biodiversity conservation measures and fisheries management regulations was high, noncompliance with minimum size limits was common and further education of anglers appears to be necessary. The study has shown that for fisheries management purposes, any creel survey of the Blackwood Estuary should ensure that local anglers and boat-based anglers are adequately surveyed.

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