Inter-Research > DAO > v78 > n2 > p173-177  
Diseases of Aquatic Organisms

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DAO 78:173-177 (2007)  -  DOI:

Dorsoventral transposition of the heart chambers in sturgeon Acipenser naccarii alevins

Alejandro Guerrero1, Ana C. Durán1, José M. Icardo2, Borja Fernández1, Alberto Domezain3, Valentín Sans-Coma1,*

1Department of Animal Biology, Faculty of Science, University of Málaga, 29071 Málaga, Spain
2Department of Anatomy and Cell Biology, University of Cantabria, 30911 Santander, Spain
3Department R&D Piscifactoría ‘Sierra Nevada’, Camino de la Piscifactoría 2, 18313 Riofrío, Granada, Spain
*Corresponding author. Email:

ABSTRACT: This is the first description of a dorsoventral transposition of the heart chambers in sturgeons Acipenser naccarii. The affected individuals were 2 farmed alevins aged 9 and 10 d post-hatching, respectively. One was examined by light microscopy and the other by scanning electron microscopy. In both cases, the atrium and sinus venosus occupied a left ventrolateral position, the ventricle, conus arteriosus and bulbus arteriosus were located dorsally, and the transverse septum was incomplete. The anomalous heart examined by light microscopy did not differ histologically from normal hearts of similar developmental stages. The abnormal dorsoventral arrangement of the heart chambers was presumably due to a distortion of the morphogenetic movements that bring the ventricle to the ventral and the atrium to the dorsal position. The present findings, together with genetic data reported in the literature, suggest that the defective cardiac phenotype detected in the present specimens might result from a mutation affecting the sturgeon ortholog of the zebrafish overlooped (olp) gene.

KEY WORDS: Heart malformation · Cardiac chamber transposition · Sturgeon · Acipenser naccarii

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Cite this article as: Guerrero A, Durán AC, Icardo JM, Fernández B, Domezain A, Sans-Coma V (2007) Dorsoventral transposition of the heart chambers in sturgeon Acipenser naccarii alevins. Dis Aquat Org 78:173-177.

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