Estimating the value of tropical coastal wetland habitats to fisheries: caveats and assumptions

Abrantes, Kátya G., Sheaves, Marcus, and Fries, Jakob (2019) Estimating the value of tropical coastal wetland habitats to fisheries: caveats and assumptions. PLoS ONE, 14 (4). e0215350.

[img]
Preview
PDF (Published version) - Published Version
Available under License Creative Commons Attribution.

Download (2MB) | Preview
View at Publisher Website: https://doi.org/ 10.1371/journal.pone.02...
 
4
92


Abstract

Habitat valuation can provide an objective basis for the prioritisation of conservation and restoration actions. The attribution of fisheries production to particular habitat units is an important measure of value, but is difficult to estimate. Using the case study of habitat use by juvenile banana prawns in a tropical estuary, we assessed the potential to produce valid value estimates at two spatio-conceptual scales: estuary reach and whole estuary. Additionally, we also explore the potential to produce meaningful value estimates at the scale of whole estuary contribution to the offshore fisheries stock. A diversity of potential and actual sources of error and logical problems means that quantification at any scale is at best of uncertain validity and produces estimates that are likely to produce unreliable results if treated as quantitative inputs to production models. Estimates for the whole estuary were the most viable, although still requiring substantial assumptions that may or may not be reasonable in particular situations. Estimates for individual habitats required the unreasonable assumption of limited prawn movement, while estimates of contribution of an estuary to the fishery required difficult-to-obtain and usually unavailable information. Because low occupancy habitats can have trophic value, we also used stable isotope analysis to assess the importance of mangroves and saltmarshes to prawn nutrition. No particular habitat was of critical trophic importance, again suggesting that the habitat-production link is most usefully assessed at the whole-of-estuary scale. While valuable and required to support targeted ecosystem management and protection and restoration efforts, valid estimates of the contribution of particular units to fisheries are likely to be unachievable in many situations.

Item ID: 60522
Item Type: Article (Research - C1)
ISSN: 1932-6203
Copyright Information: © 2019 Abrantes et al. This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY 4.0) License.
Funders: National Environmental Research Program
Projects and Grants: NESP Marine Biodiversity Hub
Date Deposited: 25 Nov 2019 03:05
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050205 Environmental Management @ 10%
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050209 Natural Resource Management @ 40%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 50%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8302 Fisheries - Wild Caught > 830202 Wild Caught Crustaceans (excl. Rock Lobster and Prawns) @ 50%
96 ENVIRONMENT > 9612 Rehabilitation of Degraded Environments > 961201 Rehabilitation of Degraded Coastal and Estuarine Environments @ 50%
Downloads: Total: 92
Last 12 Months: 17
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page