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Inland Water Biology

, Volume 12, Issue 1, pp 128–131 | Cite as

Disturbance of Synchronous Oocyte Development in Bream Abramis brama L. from the Rybinsk Reservoir

  • A. V. GermanEmail author
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Abstract

The seasonal dynamics of oocyte sizes in bream has been studied. Asynchronous oocyte development causes the formation of the second batch of eggs in some specimens in the sample. The dynamics of the formation of the second oocyte batch, the high variability of their number and proportion of the total number of oocytes, and the resorption of the first batch of eggs after spawning differ from a typical asynchronous oocyte development in species with portioned spawning. The repeated spawning of bream is currently unlikely.

Keywords:

bream oocytes asynchronous development 

Notes

ACKNOWLEDGMENTS

This study was conducted within the framework of a state assignment, project no. g/r АААА-А18-118012690104-3.

COMPLIANCE WITH ETHICAL STANDARDS

Conflict of interests. The authors declare that they have no conflict of interest.

Statement on the welfare of animals. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  1. 1.Papanin Institute for Biology of Inland Waters, Russian Academy of SciencesBorokRussia

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