Galina Nazarova - Academia.edu (original) (raw)
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Papers by Galina Nazarova
Zoologicheskii zhurnal, 2011
Zoologicheskii zhurnal, 2011
Izv. Sib. Otd. Ross. Akad. Nauk, 1986
Izv. Sib. Otdel. Akad. Nauk SSSR. Ser. …, 1986
order, 1994
The aim of the study was to determine the effects of male social status on: (a) its odor attracti... more The aim of the study was to determine the effects of male social status on: (a) its odor attractiveness to females; (b) probability to induce estrus in females and to mate; (c) litter size and sex ratio of offspring. It was found that females preferred the odors of dominant males. In pairs with dominants a greater proportion of the females achieved estrus and were mated, compared to pairs with subordinates. Litters produced by subordinate males were smaller in size and male-biased. The adaptive significance of sex ratio regulation of offspring is discussed.
Ekologiya, 2010
Поступила в редакцию 26.02.2009 г.
Russian Journal of Ecology, 2010
Поступила в редакцию 26.02.2009 г.
Зоологический журнал, 2000
Doklady Akademii Nauk, 2007
Advances in Chemical Signals in …, 1999
The aim of this study was to determine whether pup weight and growth rate are correlated with the... more The aim of this study was to determine whether pup weight and growth rate are correlated with the "attractiveness" of the odor of the male that the female mated with. To determine male attractiveness, receptive water vole (Arvicola terrestris L.) females were exposed to odor stimuli from triads of males. The odor stimulus from each male was presented to 1-5 different females. The average time of odor investigation served as a measure of male attractiveness. For breeding, male-female pairs were chosen randomly. It was found that the attractiveness of a male's odor was positively correlated with the mean birth weight of his progeny and their growth rate to weaning. A relationship between pup characteristics and father's social rank or body weight was not observed. Because the measured attractiveness of the male odor was not based only on the preference of his mate or on the male's social/physical status, we suggest that some mechanisms other than genetic dissimilarity, kinship or dominance are involved in odor attractiveness.
Advances in ethology, 2004
Zoologicheskii zhurnal, 2007
... Mating, ovulation and corpus luteum function in the vole Microtus agrestis // J. Reprod. Fert... more ... Mating, ovulation and corpus luteum function in the vole Microtus agrestis // J. Reprod. Fert. V. 42. P. 3544. Moorhouse TP, Macdonald DW, 2005. Temporal pattern of range use in water vole: do female's territories drift? // J. Mammal. V. 86. P. 655662. Petersen L., 1986. ...
Contemporary Problems of Ecology, 2010
Male aggressiveness can affect male reproductive success both directly by increasing competitiven... more Male aggressiveness can affect male reproductive success both directly by increasing competitiveness and indirectly through female preference. Assuming that significance of male aggressiveness in species having different mating systems can be different, we studied how male aggressiveness relates to sexual attractiveness in polygynous rodents, the water vole (Arvicola terrestris) and the house mouse (Mus musculus), and in a monogamous species, the steppe lemming (Lagurus lagurus). Our analysis revealed that the relation between odor attractiveness and aggressiveness is nonlinear. In polygynous species, males are more aggressive, so females opt for aggressive, albeit not too aggressive, males. In the monogamous steppe lemming, males show low level of intermale aggressiveness, and the most attractive are slightly aggressive males who have greater reproductive potential.
Russian Journal of Developmental Biology, 2008
Postnatal growth, life span, and probability of reproduction in the adult state depended on the m... more Postnatal growth, life span, and probability of reproduction in the adult state depended on the mother’s physical condition during pregnancy and lactation in water vole. The white fat weight in the female abdominal cavity was shown to significantly increase in pregnancy and to decrease in late lactation. As an indicators for nutritional state of females, their body weight difference after parturition (or in late lactation) and expected from the regression equation relating individual body weight at the beginning and the end of each reproductive stage were used (physical condition indexes in pregnancy or lactation). The correlation of the physical condition index in pregnancy with the storage fat weight was 0.67. The metabolic resources of the mother’s body proved to favor faster offspring development. The female offspring weight at the age of 3 and 10 weeks as well as adult ones positively correlated with the mother’s nutritional state in pregnancy, while the male offspring weight demonstrated a similar correlation at the age of 3 and 6 weeks. Increased negative energy balance during lactation proved to decrease the offspring weight in both sexes after separation from mother and at the age of 6 weeks. High nutritional state of mother in pregnancy favored both the probability of reproduction and life span of female offspring. The reproduction of male offspring did not depend on the mother’s physical condition. The life span peaked in male offspring of mothers in a nutritional state below average in pregnancy and above average in lactation. Thus, the physical condition of the mother’s body is an important sex-dependent factor of phenotypic variation in the offspring body weight, reproductive competence, and life span.
Zoologicheskii zhurnal, 2011
Zoologicheskii zhurnal, 2011
Izv. Sib. Otd. Ross. Akad. Nauk, 1986
Izv. Sib. Otdel. Akad. Nauk SSSR. Ser. …, 1986
order, 1994
The aim of the study was to determine the effects of male social status on: (a) its odor attracti... more The aim of the study was to determine the effects of male social status on: (a) its odor attractiveness to females; (b) probability to induce estrus in females and to mate; (c) litter size and sex ratio of offspring. It was found that females preferred the odors of dominant males. In pairs with dominants a greater proportion of the females achieved estrus and were mated, compared to pairs with subordinates. Litters produced by subordinate males were smaller in size and male-biased. The adaptive significance of sex ratio regulation of offspring is discussed.
Ekologiya, 2010
Поступила в редакцию 26.02.2009 г.
Russian Journal of Ecology, 2010
Поступила в редакцию 26.02.2009 г.
Зоологический журнал, 2000
Doklady Akademii Nauk, 2007
Advances in Chemical Signals in …, 1999
The aim of this study was to determine whether pup weight and growth rate are correlated with the... more The aim of this study was to determine whether pup weight and growth rate are correlated with the "attractiveness" of the odor of the male that the female mated with. To determine male attractiveness, receptive water vole (Arvicola terrestris L.) females were exposed to odor stimuli from triads of males. The odor stimulus from each male was presented to 1-5 different females. The average time of odor investigation served as a measure of male attractiveness. For breeding, male-female pairs were chosen randomly. It was found that the attractiveness of a male's odor was positively correlated with the mean birth weight of his progeny and their growth rate to weaning. A relationship between pup characteristics and father's social rank or body weight was not observed. Because the measured attractiveness of the male odor was not based only on the preference of his mate or on the male's social/physical status, we suggest that some mechanisms other than genetic dissimilarity, kinship or dominance are involved in odor attractiveness.
Advances in ethology, 2004
Zoologicheskii zhurnal, 2007
... Mating, ovulation and corpus luteum function in the vole Microtus agrestis // J. Reprod. Fert... more ... Mating, ovulation and corpus luteum function in the vole Microtus agrestis // J. Reprod. Fert. V. 42. P. 3544. Moorhouse TP, Macdonald DW, 2005. Temporal pattern of range use in water vole: do female's territories drift? // J. Mammal. V. 86. P. 655662. Petersen L., 1986. ...
Contemporary Problems of Ecology, 2010
Male aggressiveness can affect male reproductive success both directly by increasing competitiven... more Male aggressiveness can affect male reproductive success both directly by increasing competitiveness and indirectly through female preference. Assuming that significance of male aggressiveness in species having different mating systems can be different, we studied how male aggressiveness relates to sexual attractiveness in polygynous rodents, the water vole (Arvicola terrestris) and the house mouse (Mus musculus), and in a monogamous species, the steppe lemming (Lagurus lagurus). Our analysis revealed that the relation between odor attractiveness and aggressiveness is nonlinear. In polygynous species, males are more aggressive, so females opt for aggressive, albeit not too aggressive, males. In the monogamous steppe lemming, males show low level of intermale aggressiveness, and the most attractive are slightly aggressive males who have greater reproductive potential.
Russian Journal of Developmental Biology, 2008
Postnatal growth, life span, and probability of reproduction in the adult state depended on the m... more Postnatal growth, life span, and probability of reproduction in the adult state depended on the mother’s physical condition during pregnancy and lactation in water vole. The white fat weight in the female abdominal cavity was shown to significantly increase in pregnancy and to decrease in late lactation. As an indicators for nutritional state of females, their body weight difference after parturition (or in late lactation) and expected from the regression equation relating individual body weight at the beginning and the end of each reproductive stage were used (physical condition indexes in pregnancy or lactation). The correlation of the physical condition index in pregnancy with the storage fat weight was 0.67. The metabolic resources of the mother’s body proved to favor faster offspring development. The female offspring weight at the age of 3 and 10 weeks as well as adult ones positively correlated with the mother’s nutritional state in pregnancy, while the male offspring weight demonstrated a similar correlation at the age of 3 and 6 weeks. Increased negative energy balance during lactation proved to decrease the offspring weight in both sexes after separation from mother and at the age of 6 weeks. High nutritional state of mother in pregnancy favored both the probability of reproduction and life span of female offspring. The reproduction of male offspring did not depend on the mother’s physical condition. The life span peaked in male offspring of mothers in a nutritional state below average in pregnancy and above average in lactation. Thus, the physical condition of the mother’s body is an important sex-dependent factor of phenotypic variation in the offspring body weight, reproductive competence, and life span.