Parasites as biological tags for stock identification of blackspot seabream, &lt;i&gt;Pagellus bogaraveo&lt;/i&gt;, in Portuguese northeast Atlantic waters

Aurélia Saraiva,Cristina Cruz,Margarida Hermida

doi:10.3989/scimar.03859.17a

Abstract

In this study the following parasites were selected as biological tags for the identification of blackspot seabream ( Pagellus bogaraveo ) stocks in the northeast Atlantic: Diphterostomum vividum (Digenea: Zoogonidae), Anisakis simplex s.l., A. physeteris, Anisakis sp. PB-2010 (Nematoda: Anisakidae), and Bolbosoma sp. (Acanthocephala: Polymorphidae). These parasite species point to the existence of three blackspot seabream stocks in the northeast Atlantic: one in the Azores region (ICES Area X), one in continental Portuguese shelf/slope waters (ICES Area IXa), and one in the waters around Madeira (sub-area 1.2 of FAO 34, central-eastern Atlantic).

Highlights

The blackspot seabream, Pagellus bogaraveo (Brünnich, 1768), is a benthopelagic sparid fish that occurs in the northeast Atlantic and Mediterranean Sea, mostly on the continental shelf break and slope, on seamounts and around islands, at depths of up to 800 m (Spedicato et al 2002, Menezes et al 2006)
Estas especies de parásitos indican la existencia de tres poblaciones distintas de besugo en el Atlántico nordeste: una en la región de los Azores (ICES Zona X), otra en la plataforma/ talud continental portugués (ICES Zona IXa), y una tercera en las aguas adyacentes a la isla de Madeira (Subzona 1.2 de la FAO 34, Atlántico centro-este)
Studies of mitochondrial DNA markers show that P. bogaraveo exhibits an exceptionally low genetic variability, consistent with the occurrence of a past bottleneck (Bargelloni et al 2003, Stockley et al 2005, Lemos et al 2006), which has been estimated to have happened in the late Pleistocene, a period characterized by strong

Summary

Introduction

The blackspot seabream, Pagellus bogaraveo (Brünnich, 1768), is a benthopelagic sparid fish that occurs in the northeast Atlantic and Mediterranean Sea, mostly on the continental shelf break and slope, on seamounts and around islands, at depths of up to 800 m (Spedicato et al 2002, Menezes et al 2006). It is a slow-growing and relatively long-lived species, with a protandric hermaphroditic reproductive system. Studies of mitochondrial DNA markers show that P. bogaraveo exhibits an exceptionally low genetic variability, consistent with the occurrence of a past bottleneck (Bargelloni et al 2003, Stockley et al 2005, Lemos et al 2006), which has been estimated to have happened in the late Pleistocene, a period characterized by strong

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Discussion

Conclusion