利得曲線の本質
1Royal Botanic Gardens Victoria, Birdwood Avenue, Melbourne, VIC, 3141, Australia.
Biological reviews of the Cambridge Philosophical Society
|January 29, 2026
まとめ
性配分理論における利得曲線には欠陥がある可能性がある。それらはしばしば無制限の配偶者を仮定するが、これは個体群にとって非現実的であり、不正確な進化予測や種パターンの説明につながる可能性がある。
科学分野:
- 進化生物学
- 性配分理論
- 個体群力学
背景:
- 利得曲線は、生殖投資からのフィットネスゲインを例示する、性配分理論における従来のモデルである。
- 現在のモデルは、個体群レベルの配偶動態を反映しない一定の配偶者利用可能性を仮定している。
研究 の 目的:
- 性配分理論における従来の利得曲線の適用可能性を批判的に評価すること。
- 個体群レベルの進化や種間パターンを説明する上での利得曲線の限界を探求すること。
主な方法:
- 個体群力学における利得曲線の仮定の理論的分析。
- 固定利得曲線に基づく進化モデルの批判。
- 経験的パターンと代替説明のレビュー。
主要な成果:
- 利得曲線は個々の生殖成功を単純化し、個体群レベルの動態を正確に表現することはできない。
- 固定された利得曲線を用いたモデルは、オスとメスの機能の不均等な総フィットネスなど、生物学的に不可能な結果をもたらす可能性がある。
- 利得曲線は、局所的な配偶者競争や分散などの要因から注意をそらし、種間パターンを誤って説明する可能性がある。
結論:
- 性配分のより正確な理解のためには、利得曲線フレームワークの修正が必要である。
- 配偶競争や分散などの代替説明は、観察された種間パターンをよりよく説明する可能性がある。
- 性配分理論とその経験的応用を進めるためには、利得曲線の再考が重要である。
関連する概念動画
Gain
410
Gain and phase shift are properties of linear circuits that describe the effect a circuit has on a sinusoidal input voltage or current. The circuit's behavior that contains reactive elements will depend on the frequency of the input sinusoid. As a result, it is observed that the gain and phase shift will all be frequency functions.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.
410
What is Natural Selection?
128.9K
Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
128.9K
Nature and Nurture
22.3K
Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience,...
22.3K
Heating and Cooling Curves
27.8K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
27.8K
Acid-Base Titration Curves
141.1K
A titration curve is a plot of some solution property versus the amount of added titrant. For acid-base titrations, solution pH is a useful property to monitor because it varies predictably with the solution composition and, therefore, may be used to monitor the titration’s progress and detect its endpoint. Acid-base titration can be performed with a strong acid and a strong base, a strong acid and a weak base, or a strong base and a weak acid.
For a titration carried out for 25.00 mL of...
For a titration carried out for 25.00 mL of...
141.1K
Tangent to a Curve
330
The graph of a function where each output is the square of the input creates a smooth curve that bends upward, becoming steeper as one moves further from the center. At any chosen position along this curve, the curve reaches a certain height depending on the input value. This position can be a reference for analyzing how the curve behaves in its immediate vicinity.To understand the change in the curve near a particular position, imagine selecting another point slightly ahead along the curve.
330


