An ecosystem approach to fisheries strives to balance diverse social objectives, by taking into account the knowledge and uncertainties about biotic, abiotic, and human components of ecosystems and their interaction and applying an integrated approach to fisheries within ecological meaningful...
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Classically, fisheries statistics document those components of the catches that are landed whether fishing is for commercial or recreational purposes. Bycatch may include seabirds, marine mammals and non-commercial fish and invertebrates and such bycatch is often discarded is often not...
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Geological surveys provide information on sediment types and these data are useful in the identification of vulnerable habitats. Such data are not part of the fisheries statistics system although data are used in fisheries management.
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Statistics on social and economic aspects of fisheries are required as part of an ecosystem approach. These data are discussed in section on social and economic fisheries statistics.
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Documentation that fisheries impact is within sustainable limits is based on fisheries statistics supplemented with and analysis of these data normally summarized in the form of indicators. Such indicators are often related to reference points that have been agreed as...
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In order to assess fleet capacity, it is necessary as a bare minimum to have estimates of vessel numbers and main vessel characteristics. If the fleet consists of only one type of vessel, the number of fishing vessels may be...
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Vessel tonnage
In international law, as well as in practice, two measurements of tonnage of ships have existed side by side: Gross Registered Tonnage (GRT) defined by the Oslo Convention (1947), and Gross Tonnage (GT) defined by the London Convention (1969)....
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In the context of fisheries data, geographic coordinates will consist of pairs of (x,y) numerical values handled in the spatial reference system considered (refer spatial reference system). If needed, these pairs may be extended to include a third dimension with...
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Geographic coordinates WKT format
In Method 3 above, the recommended format for handling coordinates is the OGC Well-Known-Text format (WKT). Whatever the geometric shape, WKT provides a simple string representation of the geometry. In that way, a single column is...
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Use of Degrees-Minutes-Seconds (DMS)
In the case of handling geographic coordinates in official reports and publications, the geographic coordinates can be enumerated using the Degrees-Minutes-Seconds (DMS) notation. This notation is generally used in the legal context where the DMS appears to...
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