Differences in demersal community structure and biomass size spectra within and outside the Maltese Fishery Management Zone (FMZ)

Mark Dimech; Mattew Camilleri; Jan G. Hiddink; Michel J. Kaiser; Sergio Ragonese; Patrick J. Schembri

doi:10.3989/scimar.2008.72n4669

Autores/as

Mark Dimech School of Ocean Sciences, Bangor University
Mattew Camilleri Malta Centre for Fisheries Science (MCFS)
Jan G. Hiddink School of Ocean Sciences, Bangor University
Michel J. Kaiser School of Ocean Sciences, Bangor University
Sergio Ragonese Istituto per l’Ambiente Marino Costiero IAMC/CNR Section of Mazara
Patrick J. Schembri Department of Biology University of Malta

DOI:

https://doi.org/10.3989/scimar.2008.72n4669

Palabras clave:

Canal de Sicilia, espectro de biomasa, pesquerías de Malta, campañas de arrastre, mar Mediterráneo, comunidades demersales, Áreas Marinas Protegidas

Resumen

Examinamos el efecto de protección de una zona de protección pesquera establecida desde hace mucho tiempo mediante el estudio de las comunidades demersales y espectros de biomasa de grupos taxonómicos específicos. Los resultados del análisis de comunidades se discuten en el contexto de las campañas de arrastre MEDITS, que sirvieron para generar los datos, y se señalan las implicaciones para la gestión de recursos pesqueros de nuestros resultados. Los recursos pesqueros demersales de fondos de arrastre fangosos se encuentran estratificados en 4 rangos de profundidad: 83-166 m (plataforma continental externa), 140-230 m (límite entre la plataforma y el talud), 270-440 m (talud superior) y 466-701 (talud medio). El único grupo dentro de la zona de protección que resultó diferente significativamente del estrato equivalente fuera de la zona de protección fue el grupo de la plataforma continental externa. Las estaciones de este estrato dentro de la zona de protección resultaron tener el doble de biomasa que las estaciones equivalentes fuera de la zona de protección, así como individuos de tallas superiores para ciertas especies (e.g. elasmobranquios). Los estratos de profundidad identificados no coinciden con los estratos de muestreo de los programas de campañas de arrastre en el canal de Sicilia, que fueron establecidos sin tener en cuenta la estructura de comunidades y su relación con la profundidad. La caracterización de grupos bióticos es importante para mejorar la representación del muestreo en cada estrato de profundidad y tipo de comunidad y debe tenerse en cuenta para el diseño de los planes de campaña de arrastre demersal.

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Biografía del autor/a

Mark Dimech, School of Ocean Sciences, Bangor University

Malta Centre for Fisheries Science (MCFS), Malta.
Department of Biology University of Malta, Malta

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