The evolutionary ecology of animal fertility: The fitness of progeny is determined by their prenatal development (according to the example of the European water vole, Arvicola terrestris L.)

Назарова, Г. Г.; Evsikov, V. I.

doi:10.1134/s2079059712010121

Cited by 7 publications

(8 citation statements)

References 32 publications

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“…Because of the close interrelationship between the indices (reflecting energy provision of the female organism) with potential and realized fertility, the ecologically optimal regulation of the reproduction level is realized through the modification of the physiological condition which is highly sensitive to the changes in parameters of biotic and abiotic environment [7]. As follows from the population studies, pregnant females, as a rule, are in better physical condition at the peak of the population size.…”

Section: Discussionmentioning

confidence: 98%

“…Embryos actively participate in trafficking of the incoming nutrients and their allocation for their own needs. A coordination of the female-offspring conflicting needs for vital resources is fulfilled through the timely morpho-physiological adaptations which provide a normal growth of embryos and preparation of the maternal organism for energy-consuming milk production [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Correlations of reproductive indices of water vole females (Arvicola amphibius) with morphometric and hormonal characteristics

Yuzhik

Proskurnyak

Назарова

2015

J Evol Biochem Phys

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Fluctuations in water vole population size depend on abiotic and intra-population factors affecting the physiological condition of females. The relationship between reproductive success variability and morpho-physiological indices of females during pregnancy is studied quite poorly. In standard vivarium conditions, the morphometric and hormonal indices of females were assessed at different terms of pregnancy (first trimester-days 4-7, second trimester-days 8-14, third semester-days 15-20), and their relationship with potential and realized fertility and embryonic death rate was examined. The general regression model was used for the data analysis. Positive correlations were found between the potential fertility and the female body mass at mating, condition index, white adipose tissue index, and blood testosterone level. The reproductive indices under study were independent of the blood thyroxin level. A positive correlation was established between the level of embryonic loss and the liver and lung indices. Liver and spleen are essential for the maintenance of the female body mass homeostasis during the reproductive period.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Correlations of reproductive indices of water vole females (Arvicola amphibius) with morphometric and hormonal characteristics

Yuzhik

Proskurnyak

Назарова

2015

J Evol Biochem Phys

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“…Nevertheless, we found that a clear 12-year cycle is manifested in the Tomsk Region, whereas in our studies, surges in water vole numbers were observed between the intervals of 35 years. Some studies show that in conditions of anthropogenic transformation, in particular, under the influence of agriculture, the natural rhythm of population dynamics and the nature of its peaks are disrupted (Nazarova & Evsikov, 2012;Litvinov et al, 2013;Erdakov & Litvinov, 2014;Evsikov et al, 2016;Meulemans, 2020).…”

Section: Discussionmentioning

confidence: 99%

Water vole (Arvicola amphibius) as an object of long-term biomonitoring in a floodplain area (Western Siberia, Russia)

2021

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The paper is devoted to the dynamics of the water vole population in the conditions of total deforestation of valley forests and their subsequent restoration. We analyzed the relative population of small mammals in the typical biotopes in the Tom River basin (Western Siberia) on the border of the forest-steppe and taiga zones. From 1978 to 2019, 1,139 water voles Arvicola amphibius (Linnaeus, 1758) (synonym of A. terrestris) were caught with 50-meter trapping grooves; for 788 individuals we assessed the condition of non-metric features (phenes) of the skull. It was found that changes in the population level are non-cyclical, while against the background of a generally low occurrence of the species in the region, the population level increased tenfold in some years. It was shown that such episodic population surges can significantly impact the structure of the community of small mammals. In the valley of the Tom River, the water vole prefers inhabit wet meadows and ecotone areas between the meadow and the dark coniferous taiga forest. During the years of population surges, the water vole intensely occupies new nesting sites due to the dispersal activity of young animals but at the same time retains the original biotopic preferences. Dispersal of the species takes place in waterlogged wetlands. Most of the animals caught during the peak of their numbers were young animals of late broods born from overwintered individuals. The conducted phenetic analysis revealed the heterogeneity of young animals during the population surge, which allowed us to assume the participation of several populations in the formation of the peak. In the final surge year, the surge was characterized by an extremely low percentage of participation in the breeding of young females and the appearance of a large number of weakened animals, which led to crisis in the species population and the disappearance of the water vole from the captures. The research shows that one cannot predict the success of this process at the current stage; therefore, after flooding, it is necessary to continue monitoring.

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“…The ecological factors of local environment and individual maternal characteristics play an important role in fulfillment of reproductive potential and demographic dynamics of the water vole (Nazarova and Evsikov, 2000, 2004, 2007, 2008, 2012a; Muzyka et al, 2010). During breeding season, reproductive groups composed of males and females of various ages form the basic unit of the spatial organization of a water vole population (Evsikov et al, 2001; Muzyka et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…According to the results of several long-term population studies, mothers from decline phases have lower nutritional conditions, fecundity and quality offspring than those from increase or peak phase of the population cycle (Norrdahl and Korpimäki, 2002; Evsikov et al, 2008; Nazarova and Evsikov, 2012a). …”

Section: Introductionmentioning

confidence: 99%

Effects of seasonal, ontogenetic, and genetic factors on lifespan of male and female progeny of Arvicola amphibius

Назарова¹

2013

Front. Genet.

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The water vole (Arvicola amphibius) in the forest-steppe of West Siberia is known to have wide fluctuations in abundance. These fluctuations are accompanied by changes in birth and death rates, sex-age structure of the population, and individual morphophysiological and behavioral characteristics of the animals. Survival of the animals depends on season, phase of population cycle, and sex. Based on the data of long-term captive breeding of water voles, the maximal lifespan of males was found to be 1188 days and that of females, 1108 days. There were no differences between the sexes in mean lifespan. The probability of living 2 years or longer was 0.21. Individuals who began breeding at an older age had a significantly longer lifespan and produced more offspring. The survival curves of the spring-born animals were steeper than of those summer-/autumn-born. Maternal factors had a differential effect on males and females with respect to lifespan. Male lifespan correlated negatively with maternal age, parity, and litter size, whereas female lifespan did not correlate with these characteristics. To estimate heritability, parent-offspring correlations of lifespan were calculated, as well as full-sib intraclass correlations. No statistically significant correlation was found for lifespan between sons and mothers, sons and fathers, and daughters and fathers. Daughters' lifespan correlated positively with maternal lifespan (r = 0.21, p < 0.001). Female full-sibs and male full-sibs had the same intraclass correlations, 0.22, p < 0.001.

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The evolutionary ecology of animal fertility: The fitness of progeny is determined by their prenatal development (according to the example of the European water vole, Arvicola terrestris L.)

Cited by 7 publications

References 32 publications

Correlations of reproductive indices of water vole females (Arvicola amphibius) with morphometric and hormonal characteristics

Correlations of reproductive indices of water vole females (Arvicola amphibius) with morphometric and hormonal characteristics

Water vole (Arvicola amphibius) as an object of long-term biomonitoring in a floodplain area (Western Siberia, Russia)

Effects of seasonal, ontogenetic, and genetic factors on lifespan of male and female progeny of Arvicola amphibius

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