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The visual pigments of wild white sturgeon (Acipenser transmontanus)

Publication: Canadian Journal of Zoology
April 1995

Abstract

The visual pigments of the anadromous white sturgeon (Acipenser transmontanus) taken from relatively saline estuarine water were characterized by means of in situ microspectrophotometry and partial bleaching analysis of a digitonin extract. The three cone pigments (λmax = 605, 539, and ca. 460 nm) and one rod pigment (λmax = 541 nm) of the wild sturgeon are the same as those of cultured sturgeon that spend their entire lives in fresh water. All the visual pigments incorporate a chromophore based on vitamin A2. Unlike other anadromous fishes during the "saline phase," the white sturgeon shows no evidence of the presence of any vitamin A1 based visual pigment in the retina.

Résumé

Les pigments visuels d'Esturgeons blancs (Acipenser transmontanus) capturés dans de l'eau d'estuaire relativement saline, ont été étudiés par microspectrophotométrie in situ et par l'analyse d'un extrait à la digitonine soumis à un blanchissage partiel. Les trois pigments des cônes (λmax = 605, 539 et ca. 460 nm) et un pigment des bâtonnets (λmax = 541 nm) se sont avérés les mêmes chez les esturgeons sauvages que chez des esturgeons de culture qui ont passé toute leur vie en eau douce. Tous les pigments visuels étudiés incorporent un chromophore basé sur la vitamine A2. Contrairement aux autres poissons anadromes durant la phase saline, l'Esturgeon blanc ne semble pas y avoir de pigment visuel basé sur la vitamine A1 dans sa rétine.[Traduit par la Rédaction]

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cover image Canadian Journal of Zoology
Canadian Journal of Zoology
Volume 73Number 4April 1995
Pages: 805 - 809

History

Version of record online: 15 February 2011

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