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相关概念视频

Frequency-dependent Selection01:21

Frequency-dependent Selection

When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.Positive Frequency-Dependent SelectionIn positive...
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...

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Emerging tools to advance neuroethology in butterflies and moths.

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Evolution of the olfactory system during the radiation of Heliconiini butterflies.

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Weighting of sensory cues reflect changing patterns of visual investment during ecological divergence in <i>Heliconius</i> butterflies.

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Selection drives divergence of eye morphology in sympatric Heliconius butterflies.

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相关实验视频

Updated: Jun 23, 2026

Determination of Photoreceptor Cell Spectral Sensitivity in an Insect Model from In Vivo Intracellular Recordings
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在蝶Heliconius中量化视力敏度.

Daniel Shane Wright1, Anupama Nayak Manel1, Michelle Guachamin-Rosero1,2

  • 1Division of Evolutionary Biology, Faculty of Biology, LMU Munich, Planegg-Martinsried, Germany.

Biology letters
|December 13, 2023
PubMed
概括

这项研究首次估计了Heliconius蝶的视力敏度,发现雄性比雌性视力更敏. 这影响了蝶与捕食者相比如何感知翅膀图案.

关键词:
后遗症主义是一种后遗症.颜色图案的颜色模式感官感知是一种感官感知.

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科学领域:

  • 动物行为 动物行为
  • 进化生物学是进化的生物学.
  • 感官生态学 感官生态学

背景情况:

  • 蝶使用彩色的翅膀图案来威捕食者和选择伴侣.
  • 了解视觉能力对于解释这些信号的功能至关重要.
  • 以前的研究集中在色彩视觉和神经解剖学上,但视觉敏度仍然没有研究.

研究的目的:

  • 提供第一个对Heliconius蝶视力敏度的定量估计.
  • 为了比较雄性和雌性Heliconius之间的视觉敏度.
  • 评估Heliconius的视觉敏度如何影响它们对视觉信号的感知相对于鸟类捕食者.

主要方法:

  • 用一种行为性光运动测试来测量视力敏度.
  • 检查了眼睛形态,包括ommatidia数量.
  • 通过比较蝶和鸟类捕食者的分辨能力来估计视觉感知.

主要成果:

  • 蝶的平均视觉敏度估计为每度0.49个周期 (cpd).
  • 男性的视力敏度明显高于女性.
  • 与女性眼相比,男性Heliconius的眼睛具有更多的眼球.
  • 虽然鸟类捕食者保留了高分辨率,但Heliconius蝶在更远的距离上失去细节感知.

结论:

  • 这项研究确定了Heliconius的基线视觉敏度,揭示了性二态.
  • 这些发现表明,Heliconius可能更多地依赖颜色而不是细节来进行远距离信号传输.
  • 结果为有关Heliconius翅膀模式多样化和物种化的进化研究提供了关键的见解.