| The people of Spiti have a system of polyandry and primogeniture to combat the short supply of resources that are available in the raw mountains. |
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| Polygyny and polyandry are not allowed, and it is forbidden to marry close family and kin members. |
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| Thus the expectations regarding the strength of sexual selection for polygyny, polyandry, and monogamy are fairly simple. |
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| The polyandry of female Uta may be a strategy to obtain genes to produce both high quality sons and daughters. |
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| Most marriages are monogamous, although fraternal polyandry is permitted and is even considered to be prestigious. |
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| And in any case, polyandry is certainly not the ideal for Indian womanhood. |
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| Most offspring were from monogamous pairs, but a few cases consistent with polygyny by males or sequential polyandry by females were also found. |
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| In the rare mating system called polyandry, the female breeds with several males, which then raise the offspring alone. |
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| We discuss our findings with respect to proximate and ultimate hypotheses regarding the causes and significance of polyandry in female birds. |
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| Birds are polygamists, monogamists, and in certain cases are given to practices of polyandry. |
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| Monogamy is the norm, although some Tibetan-speaking peoples practice fraternal polyandry. |
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| Longevity of monandrous females was not related to female body weight, nor was there any relationship between degree of polyandry and female body weight. |
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| From then on, polygyny replaced polyandry as a marital practice. |
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| Cichlids also employ polyandry, in which females mate with several males. |
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| As a general term, polygamy therefore includes the practices of bigamy, polyandry, and polygyny. |
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| The explanation for a smattering of polyandry in humans, however, remains a matter of guesswork for anthropologists. |
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| The abolition of polygamy and polyandry has been successful because of the witness of our monogamous families. |
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| Accordingly, there is no certainty of the paternity of her children, in case of polyandry. |
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| It is a predominantly monandrous species in which a reduced frequency of polyandry has proved to be modulated by both genetic and environmental or physiological factors. |
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| If level of education and income increases, the dependency on male and vice versa decreases and thereby polygamy and polyandry abolishes or at least decreases. |
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| There they fit the existence of polygamy and polyandry families. |
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| Genetic evidence for cooperative polyandry in reverse dichromatic Eclectus parrots. |
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| Prairie dogs are excellent models for a study of polyandry because they are easy to livetrap, mark, and observe. |
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| Otherwise, why aren't more Chinese and Indian young men, who are facing a dramatic shortage of women to marry thanks to the invention of amniocentesis and sonograms, turning to polyandry? |
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| Selective predation on male frogs by the polecat decreases the occurrence of polyandry in frog populations. |
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| Fourth, there appear a number of similarities between polyandry and matriliny, despite that descent systems stemming from opposite lines. |
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| A few populations practice polyandry, although this does not seem to benefit hatchlings. |
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| That included, for him, the practice of polyandry, by which his mother had slept contentedly with two brothers, one upstairs and one down, and he had never cared which man his father was. |
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| The polyandry system in which a woman can have more than one husband is a common practice in some groups, but limited to female authority professions. |
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| Polygyny can thus only be accepted if polyandry is also accepted. |
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| Although polyandry exists, polygyny is the most common form of polygamy. |
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| This differs from polyandry and polygyny, which are contractual. |
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| This polyandry does not provide the offspring with any special advantages. |
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| Polyandry in lekking species may also occur if assessment criteria are subject to error, and in less well-understood situations. |
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