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Topography of the Ganglion Retinal Layer and Retinal Resolution in the Rough-Toothed Dolphin Steno bredanensis (Cetacea: Delphinidae)

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Abstract

Morphological investigation of the retinal ganglion layer in the rough-toothed dolphin Steno bredanensis was performed using the retinal wholemount technique. Mapping of the density of ganglion cells revealed two areas of their concentration: in the nasal (544 cells/mm2) and temporal (594 cells/mm2) quadrants. Ganglion cell diameters ranged from 12 to 50 µm, with mean values varying from 20 to 29 µm in different areas. The obtained cell densities corresponded to a retinal resolution of 11'.

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ACKNOWLEDGMENTS

The authors are grateful to E. and V. Rodionov for their help in obtaining the material.

Funding

This work was supported by the State budget funding to the Institute of Ecology and Evolution of the Russian Academy of Sciences.

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Authors and Affiliations

  1. Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia

    A. M. Mass & A. Ya. Supin

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  1. A. M. Mass
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Contributions

A.M. Mass: task formulation, processing of the material, examination of preparations, writing a manuscript. A.Ya. Supin: data processing software, quantitative data analysis, writing a manuscript.

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Correspondence to A. M. Mass.

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COMPLIANCE WITH ETHICAL STANDARDS

All applicable international, national and institutional principles of handling and using experimental animals for scientific purposes were observed.

This study did not involve human subjects as research objects.

CONFLICT OF INTEREST

Authors of this study have no conflict of interest.

Additional information

Russian Text © The Author(s), 2021, published in Zhurnal Evolyutsionnoi Biokhimii i Fiziologii, 2021, Vol. 57, No. 2, pp. 136–143https://doi.org/10.31857/S0044452921020042.

Translated by A. Polyanovsky

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Mass, A.M., Supin, A.Y. Topography of the Ganglion Retinal Layer and Retinal Resolution in the Rough-Toothed Dolphin Steno bredanensis (Cetacea: Delphinidae). J Evol Biochem Phys 57, 221–229 (2021). https://doi.org/10.1134/S0022093021020046

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  • DOI: https://doi.org/10.1134/S0022093021020046

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