Related Experiment Video
Updated: Feb 9, 2026
06:23
Leveraging Micro-CT Scanning to Analyze Parasitic Plant-Host Interactions
Published on: January 12, 2022
2.4K
Melanin-based coloration and host-parasite interactions under global change
J Côte1, A Boniface2, S Blanchet3
1Laboratoire Évolution & Diversité Biologique EDB, UMR 5174, UPS; CNRS; ENSFEA; IRD, Université Toulouse 3 Paul Sabatier, Toulouse, France.
Proceedings. Biological Sciences
|June 1, 2018
Summary
Melanin coloration influences animal disease resistance and parasite exposure. Understanding this link is crucial for predicting how animals will adapt to changing environments and disease risks.
Area of Science:
- Ecology
- Evolutionary Biology
- Animal Behavior
Background:
- Melanin-based color polymorphism is common in vertebrates.
- The role of parasites in shaping this polymorphism and its consequences for disease resistance are debated.
Purpose of the Study:
- To review evidence linking melanin coloration to behavioral and immunological defenses against parasites.
- To propose mechanisms by which color morphs affect parasite exposure and infection outcomes.
- To discuss the implications for sexual selection, natural selection, and the maintenance of color polymorphism.
Main Methods:
- Literature review of recent evidence.
- Synthesis of findings on coloration, behavior, immunity, and parasite interactions.
- Theoretical propositions on the evolutionary dynamics.
Main Results:
- Color morphs can influence parasite exposure through differential attractiveness or behavioral variations.
- Immune system variations between color morphs can affect parasite coping abilities.
- These factors can drive variable selection pressures and influence sexual selection.
Conclusions:
- Parasites likely play a significant role in maintaining melanin-based color polymorphism.
- Future studies must integrate coloration into predictions of animal evolutionary responses to climate change and altered disease landscapes.
Related Concept Videos
01:50Global Climate Change
29.0K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
29.0K
03:02Colors and Magnetism
14.2K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.2K
01:24Color Vision
1.5K
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
1.5K
02:39Predator-Prey Interactions
21.7K
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.
21.7K
01:20Rates of Change
130
The rate of change is a central concept in mathematics that quantifies how one variable varies in response to another. It serves as a foundational tool in modeling dynamic systems across disciplines such as physics, biology, economics, and engineering. Understanding both average and instantaneous rates of change enables the analysis of behavior in functions that describe real-world phenomena.Average Rate of ChangeFor a function f(x) defined over an interval [x1,x2], the average rate of change...
130
01:17Work Done During Volume Change
5.2K
In mechanics, work is done on an object when the force acting on it displaces the object. In thermodynamics, work done on a system can be estimated when the system's volume changes during any thermodynamic process.
Consider a gas confined to a cylinder fitted with a movable piston at one end. If the gas expands from volume V1 to volume V2, it exerts a force on the piston, such that the piston moves by a distance dr.
The work done by the gas on the piston can be expressed as
Consider a gas confined to a cylinder fitted with a movable piston at one end. If the gas expands from volume V1 to volume V2, it exerts a force on the piston, such that the piston moves by a distance dr.
The work done by the gas on the piston can be expressed as
5.2K