Influence of the Concentration of Dissolved Oxygen on Embryonic Development of the Common Toad (Bufo bufo)статья

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Дата последнего поиска статьи во внешних источниках: 15 января 2016 г.

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[1] Dmitrieva E. V. Influence of the concentration of dissolved oxygen on embryonic development of the common toad (bufo bufo) // Russian Journal of Developmental Biology. — 2015. — Vol. 46, no. 6. — P. 368–380. Several series of experiments investigating the influence of dissolved oxygen concentrations on the growth rates and mortality in the embryogenesis of the common toad Bufo bufo were carried out. The experiments showed that, when the eggs develop singly, the lack of oxygen does not lead to an increase in mortality by the time of hatching and results only in a change in the dynamics of mortality: mortality occurs at an earlier stage of development than in the conditions of normal access to oxygen. Taking into account the combined effect of the density of eggs and the dissolved oxygen concentration, we increase the accuracy of analysis of the experimental results and improve the interpretation of the results. In the conditions of different initial density of eggs, the impact of the concentration of dissolved oxygen on mortality and rates of development of the common toad embryos is manifested in different ways. At high density, only a small percentage of embryos survives by the time of hatching, and the embryos are significantly behind in their development compared with the individuals that developed in normal oxygen conditions. The lack of oxygen dissolved in the water slows down the development of embryos of the common toad. [ DOI ]

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