[OANNES Foro] Fishing impacts on the marine inorganic carbon cycle

[Ignacio García-Godos]

Esto deben leerlo nuestros manejadores

Ignacio

2009/10/17 Mario Cabrejos <casal en infotex.com.pe>

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> Journal of Applied Ecology
> Volume 46 Issue 5, Pages 976 - 982
> Published Online: 13 Jul 2009
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>
> Fishing impacts on the marine inorganic carbon cycle
> Simon Jennings 1,2* and Rod W. Wilson 3
> 1 Centre for Environment, Fisheries and Aquaculture Science, Pakefield
> Road, Lowestoft, NR33 0HT, UK ;   2 School of Environmental Sciences,
> University of East Anglia, Norwich, NR4 7TJ, UK ; and   3 School of
> Biosciences, Hatherly Laboratories, University of Exeter, Exeter, Devon EX4
> 4PS, UK
>  *Correspondence author. E-mail: simon.jennings en cefas.co.uk
>
> ABSTRACT
> 1.  Teleost fish excrete precipitated carbonate and make significant
> contributions to the marine inorganic carbon cycle at regional and global
> scales. As total carbonate production is linked to fish size and abundance,
> fishing is predicted to affect carbonate production by modifying fish
> abundance and size-structure.
>
> 2.  We draw on concepts from physiology, metabolic ecology, life history
> theory, population dynamics and community ecology to develop, validate and
> apply analytical tools to assess fishing impacts on carbonate production.
> Outputs suggest that population and community carbonate production fall
> rapidly at lower rates of fishing than those used as management targets for
> sustainable yield.
>
> 3.  Theoretical predictions are corroborated by estimated trends in
> carbonate production by a herring population and a coral reef fish community
> subject to fishing. Our analytical results build on widely applicable
> relationships between life history parameters and metabolic rates, and can
> be generalized to most fished ecosystems.
>
> 4.  Synthesis and applications. If the maintenance of chemical processes as
> well as biological process were adopted as a management objective for
> fisheries then the methods we have developed can be applied to assess the
> effects of fishing on carbonate production and to advise on acceptable rates
> of fishing. Maintenance of this ecosystem service would require lower rates
> of fishing mortality than those recommended to achieve sustainable yield.
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