In the evolutionary biology of sexual reproduction, operational sex ratio (OSR) is the ratio of sexually competing males that are ready to mate to sexually competing females that are ready to mate, or alternatively the local ratio of fertilizable females to sexually active males at any given time. This differs from physical sex ratio which simply includes all individuals, including those that are sexually inactive or do not compete for mates.
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| - Sex-ratio opérationnel (fr)
- 작동 성비 (ko)
- Operational sex ratio (en)
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| - Le sex-ratio opérationnel (ou OSR pour Operating Sex-ratio en anglais) est une mesure chez les espèces sexuées du sex-ratio, c'est-à-dire le taux comparé de mâles et femelles, prenant en compte la fertilité des individus et la disponibilité de ceux-ci pour la reproduction. Il est défini comme le quotient du nombre de femelles sexuellement disponibles sur le nombre de mâles sexuellement disponibles à un moment donné. (fr)
- 성적 생식의 진화 생물학에서, 작동 성비(operational sex ratio , OSR)는 짝짓기 준비가 되어있는 성적으로 선택권이 있는 암컷(또는 배우자)과 짝짓기를 할 수 있는 동성들과 암컷을 두고 서로 경쟁하는 수컷(또는 이성 배우자)의 비율이다. 이것은 일종의 성비이지만 수정 가능한 암컷 대 성적으로 번식능력이 있는 수컷에 대한 비율인 신체적 성적 비율인 성비와는 구분된다. (ko)
- In the evolutionary biology of sexual reproduction, operational sex ratio (OSR) is the ratio of sexually competing males that are ready to mate to sexually competing females that are ready to mate, or alternatively the local ratio of fertilizable females to sexually active males at any given time. This differs from physical sex ratio which simply includes all individuals, including those that are sexually inactive or do not compete for mates. (en)
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| - In the evolutionary biology of sexual reproduction, operational sex ratio (OSR) is the ratio of sexually competing males that are ready to mate to sexually competing females that are ready to mate, or alternatively the local ratio of fertilizable females to sexually active males at any given time. This differs from physical sex ratio which simply includes all individuals, including those that are sexually inactive or do not compete for mates. The theory of OSR hypothesizes that the operational sex ratio affects the mating competition of males and females in a population. This concept is especially useful in the study of sexual selection since it is a measure of how intense sexual competition is in a species, and also in the study of the relationship of sexual selection to sexual dimorphism. The OSR is closely linked to the "potential rate of reproduction" of the two sexes; that is, how fast they each could reproduce in ideal circumstances. Usually variation in potential reproductive rates creates bias in the OSR and this in turn will affect the strength of selection. The OSR is said to be biased toward a particular sex when sexually ready members of that sex are more abundant. For example, a male-biased OSR means that there are more sexually competing males than sexually competing females. (en)
- Le sex-ratio opérationnel (ou OSR pour Operating Sex-ratio en anglais) est une mesure chez les espèces sexuées du sex-ratio, c'est-à-dire le taux comparé de mâles et femelles, prenant en compte la fertilité des individus et la disponibilité de ceux-ci pour la reproduction. Il est défini comme le quotient du nombre de femelles sexuellement disponibles sur le nombre de mâles sexuellement disponibles à un moment donné. (fr)
- 성적 생식의 진화 생물학에서, 작동 성비(operational sex ratio , OSR)는 짝짓기 준비가 되어있는 성적으로 선택권이 있는 암컷(또는 배우자)과 짝짓기를 할 수 있는 동성들과 암컷을 두고 서로 경쟁하는 수컷(또는 이성 배우자)의 비율이다. 이것은 일종의 성비이지만 수정 가능한 암컷 대 성적으로 번식능력이 있는 수컷에 대한 비율인 신체적 성적 비율인 성비와는 구분된다. (ko)
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