Differences in the Lifespan of the Freshwater Pearl Mussel Margaritifera margaritifera as vidence for the Infeasibility of Negligible Senescence (Based on Data for St. Petersburg and Leningrad Oblast)
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : I. Yu. Popov and A. N. Ostrovsky
- چاپ و سال / کشور: 2011
Description
It is considered that the main specific feature of organisms with negligible senescence is that the probability of adult individuals dying does not change with their age. However, there are almost no direct observations that could either confirm or refute this statement; moreover, such data are unobtainable for many species. From this standpoint, we have studied the freshwater pearl mussel, a species displaying signs of negligible senescence (continuous growth, long maximal lifespan, and the ability to reproduce during its entire life). Examination of individuals that have died in a natural environment suggests that the probability of their death increases with age, i.e., this species is subject to aging. This fact, as well as the gaps in substan tiation of the concept of “negligible senescence”, shows that the concept in question is erroneous.
ISSN 20790570, Advances in Gerontology, 2011, Vol. 1, No. 2, pp. 179–185. © Pleiades Publishing, Ltd., 2011. Original Russian Text © I.Yu. Popov, A.N. Ostrovsky, 2010, published in Uspekhi Gerontologii, 2010, Vol. 23, No. 3, pp. 375–381. Received March 9, 2010
