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These pages are still under construction
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Indicator summary
Summary of indicator structure and function
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| Indicator examples | Current status and trends | Management objective/direction | Stakeholder/Public acceptability |
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| Examples of how the indicator is used. | Pick one of the following:
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| meta-study of pelagic:demersal (P:D) biomass ratios from 270 coastal marine systems around the world (mostly from North America, Europe and Australasia) | |||
Definition and/or background
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tropic structure
Purpose
fisheries
Taxa
Data required
The following is from Fulton et al 2004a -
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Investigated for mostly temperate shelf to coastal inshore regions and some tropical reefs in Northern and Southern hemispheres (Fulton unpub, Caddy 2000). Not as established for tropical lagoonal systems or deepwater slope regions, though some work based on FAO data has incorporated deepwater sites (Caddy and Garibaldi 2000).
Identified capability
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Otherwise can leave this section blank and just fill in the table instead.
Biological classification level
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Response variable
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Drivers
Is there any additional information that would be of interest in regards to ecological drivers?
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Robustness
The following is from Fulton et al 2004a -
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In a meta-study of pelagic:demersal (P:D) biomass ratios from 270 coastal marine systems around the world (mostly from North America, Europe and Australasia) the P:D ratio for the entire system, not just the harvested components, was found to be consistently around the 0.15 – 0.3 level (Fulton unpub). Similarly, in a study concentrating on Port Phillip Bay, Victoria, the P:D ratio was 0.26 (Fulton unpub). These studies potentially provide some reference points for using the P:D indicator. If the ratio of small pelagics begins to increase beyond these sorts of levels, then ecosystem impacts are indicated. However, if the indicator is based on landings rather than fisheries independent biomass data the ratio may be much higher even in “healthy” systems. Thus, trends in the ratio are more informative than strict values.
Management strategies and/or objectives
define a standard set of management objectives?? ie from Indiseas
- Conservations biodiversity
- Ecosystem stability and resistance to perturbations
- ecosystem structure and functioning
- resource potential
has it been used in a management strategy? if so how?
relationship to management strategies/ objectives
Stakeholder/public acceptability
Acceptability with stakeholders
- by all stakeholder
- by the public
- understandable to the stakeholders
Associated links
References
Fulton, E.A., Smith, A.D.M., Webb, H., and Slater, J. (2004a) Ecological indicators for the impacts of fishing on non-target species, communities and ecosystems: Review of potential indicators. AFMA Final Research Report, report Number R99/1546.
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Fulton, E.A., Fuller,M., Smith, A.D.M., and Punt, A. (2004) Ecological indicators of the ecosystem effects of fishing: Final report. AFMA Final Research Report, report Number R99/1546.
Possible references for updating this indicator
Citation
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Reviewers
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Additional notes may include: personal communication, email feedback
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