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Trophic structure and energy fluxes around a Mediterranean fish farm

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  • Bayle-Sempere, Just T.
  • Arreguín-Sánchez, Francisco
  • Sanchez-Jerez, Pablo
  • Salcido-Guevara, Luis A.
  • Fernandez-Jover, Damián
  • Zetina-Rejón, Manuel J.

Abstract

A fish farm in Southeastern Spain was described using an Ecopath mass-balanced model, aimed at characterising its structure, the interactions among ecological groups and the impact of fish farms and fisheries. The model comprised 41 functional groups (including the artificial food input). Comparing consumption and respiration to total system throughput suggests lower energy use in the fish farm, resulting in an accumulation of detritus. The production to total system throughput ratio was low due to the low efficiency of the modelled ecosystem. The connectance and system omnivory indexes were low, typical of a simple or immature food web in terms of structure and dynamics. Artificial food pellets provided energy and nutrients to sustain system function and generate a considerable reserve from which it can draw to meet unexpected perturbations. The study shows the substantial effect the artificial food pellets have on the wild aggregated fishes, which could act to buffer the ecosystem and hence prevent environmental degradation.

Suggested Citation

  • Bayle-Sempere, Just T. & Arreguín-Sánchez, Francisco & Sanchez-Jerez, Pablo & Salcido-Guevara, Luis A. & Fernandez-Jover, Damián & Zetina-Rejón, Manuel J., 2013. "Trophic structure and energy fluxes around a Mediterranean fish farm," Ecological Modelling, Elsevier, vol. 248(C), pages 135-147.
    • Handle: RePEc:eee:ecomod:v:248:y:2013:i:c:p:135-147
    DOI: 10.1016/j.ecolmodel.2012.08.028
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    References listed on IDEAS

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    1. Díaz López, Bruno & Bunke, Mandy & Bernal Shirai, Julia Andrea, 2008. "Marine aquaculture off Sardinia Island (Italy): Ecosystem effects evaluated through a trophic mass-balance model," Ecological Modelling, Elsevier, vol. 212(3), pages 292-303.
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    3. Tsagaraki, Tatiana M. & Petihakis, George & Tsiaras, Kostas & Triantafyllou, George & Tsapakis, Manolis & Korres, Gerasimos & Kakagiannis, George & Frangoulis, Constantin & Karakassis, Ioannis, 2011. "Beyond the cage: Ecosystem modelling for impact evaluation in aquaculture," Ecological Modelling, Elsevier, vol. 222(14), pages 2512-2523.
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    Cited by:

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    2. Ortiz, Marco & Berrios, Fernando & Campos, Leonardo & Uribe, Roberto & Ramirez, Alejandro & Hermosillo-Núñez, Brenda & González, Jorge & Rodriguez-Zaragoza, Fabián, 2015. "Mass balanced trophic models and short-term dynamical simulations for benthic ecological systems of Mejillones and Antofagasta bays (SE Pacific): Comparative network structure and assessment of human ," Ecological Modelling, Elsevier, vol. 309, pages 153-162.
    3. Paoli, C. & Povero, P. & Burgos, E. & Dapueto, G. & Fanciulli, G. & Massa, F. & Scarpellini, P. & Vassallo, P., 2018. "Natural capital and environmental flows assessment in marine protected areas: The case study of Liguria region (NW Mediterranean Sea)," Ecological Modelling, Elsevier, vol. 368(C), pages 121-135.

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