多感官元件的相互作用在感知上拯救túngara青交配信号
1Department of Biology, Salisbury University, Salisbury, MD 21801, USA.
Science (New York, N.Y.)
|June 8, 2013
概括
雌性túngara青发现组合的声学和视觉信号具有吸引力. 这表明复杂的性信号进化可以通过结合现有的特征而产生的.
科学领域:
- 行为生态学 行为生态学
- 感官生物学 感官生物学
- 进化生物学 进化生物学
背景情况:
- 复杂的性信号通常涉及多种感官模式.
- 了解动物如何整合跨模式信号对于解释信号演变至关重要.
- 以前的研究表明,信号复杂性可能来自于组合更简单的组件.
研究的目的:
- 为了研究雌性túngara青如何感知和整合声学和视觉性信号.
- 为了确定是否组合不那么有吸引力的单个信号可以创建一个更有吸引力的复合信号.
- 探索跨模式感知在复杂动物信号进化的作用.
主要方法:
- 声学回放实验呈现合成的青叫声.
- 视觉刺激演示展示了加拉青的视觉展示.
- 行为测试测量雌性túngara青对单模对双模信号的吸引力.
主要成果:
- 个人声学和视觉信号被发现对雌性túngara青来说相对没有吸引力.
- 一个结合的信号,将声学和视觉组件整合到一个特定的模式中,显著增加了女性的吸引力.
- 这表明了协同效应,即组合信号比其部分的总和更有吸引力.
结论:
- 复杂的性信号可以通过新的整合先前存在的,不那么有吸引力的特征来演变.
- 交叉模式感知在塑造动物沟通进化的过程中发挥着重要作用.
- 意想不到的感知效应可以推动复杂的信号系统的演变.
相关概念视频
01:03Communication
Communication between two animals occurs when one animal transmits an information signal that causes a change in the animal that receives the information. Organisms communicate with one another in a host of different ways. Signals can be auditory, chemical, visual, tactile, or a combination of these. Communication is a critical behavioral adaptation that promotes survival, growth, and reproduction.
01:20Mate Choice
Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
02:39Predator-Prey Interactions
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
02:29Hybrid Zones
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.