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Current Occurrence of the Atlantic Sturgeon Acipenser oxyrinchus in Northern Spain: A New Prospect for Sturgeon Conservation in Western Europe.

Elvira B, Leal S, Doadrio I, Almodóvar A - PLoS ONE (2015)

Bottom Line: Because the sturgeon was found far away from any known breeding area, it was considered a stray or vagrant specimen.Likewise, it is imperative for southwestern European countries with an historic or recent occurrence of A. oxyrinchus to protect the species through domestic and international legislation.Accurate monitoring is mandatory to obtain appropriate information for an assessment of the current occurrence of A. oxyrinchus in southwestern Europe.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, Faculty of Biology, Complutense University of Madrid, Madrid, Spain.

ABSTRACT
Acipenser oxyrinchus is considered extirpated in Europe, but numerous breeding populations still exist on the Atlantic coast of North America. An adult female A. oxyrinchus, 2500 mm total length and 120 kg wet weight, was accidentally fished on 24 November 2010 near the coast of Gijón, Asturias, Spain. The fish was identified by its morphological pattern as well as by mitochondrial and nuclear DNA analyses. Because the sturgeon was found far away from any known breeding area, it was considered a stray or vagrant specimen. It certainly has a natural origin, but its eventual birthplace could not be determined. Because its current occurrence was unknown in southwestern Europe until now, the species is not cataloged or protected in this area. Therefore, the residual European stocks of A. oxyrinchus ought to be listed as Critically Endangered (CR) according to the IUCN categories. Likewise, it is imperative for southwestern European countries with an historic or recent occurrence of A. oxyrinchus to protect the species through domestic and international legislation. The present sympatric occurrence of A. sturio and A. oxyrinchus raises new challenges about key questions, such as the species selection for restoration program in European countries. Accurate monitoring is mandatory to obtain appropriate information for an assessment of the current occurrence of A. oxyrinchus in southwestern Europe.

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Partial dorsal view of the head.A pineal bone fills the fontanel space and is clearly visible between the frontal bones, anteriorly to the parietal bones (Photo B. Elvira, 11 May 2011).
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pone.0145728.g002: Partial dorsal view of the head.A pineal bone fills the fontanel space and is clearly visible between the frontal bones, anteriorly to the parietal bones (Photo B. Elvira, 11 May 2011).

Mentions: Morphometric and meristic characters of the sturgeon specimen caught off the coast of Gijón in 2010 are included as Supporting Information (S1 Table). The nuchal or postoccipital bone (sometimes considered as the first dorsal scute) is fused with the dermocranium behind the supraoccipital bone. Some plates are present on the left and right side of the dorsal and anal fin base. The laterodorsal and lateroventral surface of the body is densely armored with rhombic plates arranged in oblique rows. The specimen shows a typical alveolar pattern on the surface of its large scutes (Fig 1). The small rhombic plates on the laterodorsal body surfaces also display these characteristic differences. A pineal bone fills the fontanel space and is clearly visible between the frontal bones, anteriorly to the parietal bones (Fig 2).


Current Occurrence of the Atlantic Sturgeon Acipenser oxyrinchus in Northern Spain: A New Prospect for Sturgeon Conservation in Western Europe.

Elvira B, Leal S, Doadrio I, Almodóvar A - PLoS ONE (2015)

Partial dorsal view of the head.A pineal bone fills the fontanel space and is clearly visible between the frontal bones, anteriorly to the parietal bones (Photo B. Elvira, 11 May 2011).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4696671&req=5

pone.0145728.g002: Partial dorsal view of the head.A pineal bone fills the fontanel space and is clearly visible between the frontal bones, anteriorly to the parietal bones (Photo B. Elvira, 11 May 2011).
Mentions: Morphometric and meristic characters of the sturgeon specimen caught off the coast of Gijón in 2010 are included as Supporting Information (S1 Table). The nuchal or postoccipital bone (sometimes considered as the first dorsal scute) is fused with the dermocranium behind the supraoccipital bone. Some plates are present on the left and right side of the dorsal and anal fin base. The laterodorsal and lateroventral surface of the body is densely armored with rhombic plates arranged in oblique rows. The specimen shows a typical alveolar pattern on the surface of its large scutes (Fig 1). The small rhombic plates on the laterodorsal body surfaces also display these characteristic differences. A pineal bone fills the fontanel space and is clearly visible between the frontal bones, anteriorly to the parietal bones (Fig 2).

Bottom Line: Because the sturgeon was found far away from any known breeding area, it was considered a stray or vagrant specimen.Likewise, it is imperative for southwestern European countries with an historic or recent occurrence of A. oxyrinchus to protect the species through domestic and international legislation.Accurate monitoring is mandatory to obtain appropriate information for an assessment of the current occurrence of A. oxyrinchus in southwestern Europe.

View Article: PubMed Central - PubMed

Affiliation: Department of Zoology, Faculty of Biology, Complutense University of Madrid, Madrid, Spain.

ABSTRACT
Acipenser oxyrinchus is considered extirpated in Europe, but numerous breeding populations still exist on the Atlantic coast of North America. An adult female A. oxyrinchus, 2500 mm total length and 120 kg wet weight, was accidentally fished on 24 November 2010 near the coast of Gijón, Asturias, Spain. The fish was identified by its morphological pattern as well as by mitochondrial and nuclear DNA analyses. Because the sturgeon was found far away from any known breeding area, it was considered a stray or vagrant specimen. It certainly has a natural origin, but its eventual birthplace could not be determined. Because its current occurrence was unknown in southwestern Europe until now, the species is not cataloged or protected in this area. Therefore, the residual European stocks of A. oxyrinchus ought to be listed as Critically Endangered (CR) according to the IUCN categories. Likewise, it is imperative for southwestern European countries with an historic or recent occurrence of A. oxyrinchus to protect the species through domestic and international legislation. The present sympatric occurrence of A. sturio and A. oxyrinchus raises new challenges about key questions, such as the species selection for restoration program in European countries. Accurate monitoring is mandatory to obtain appropriate information for an assessment of the current occurrence of A. oxyrinchus in southwestern Europe.

Show MeSH
Related in: MedlinePlus