Related Experiment Video
Updated: Jun 26, 2025
07:55
Chemical Isolation, Quantification, and Separation of Skin Lipids from Reptiles
Published on: February 7, 2019
11.0K
Hydric Environment and Chemical Composition Shape Non-avian Reptile Eggshell Absorption
Gerben Debruyn1, Jozefien Geltmeyer2, Ella Schoolaert2
1Department of Biology, Evolution and Optics of Nanostructures Group, University of Ghent, Ledeganckstraat 35, 9000 Ghent, Belgium.
Integrative and Comparative Biology
|May 16, 2024
Summary
Reptile eggs absorb water through their shells, with arid-environment species having highly absorbent shells. This water absorption is influenced by shell composition and is key for embryo development in diverse habitats.
Area of Science:
- Evolutionary biology
- Reproductive biology
- Materials science
Background:
- Amniotic eggs are crucial for reptile reproduction, acting as a vital interface between the embryo and the external environment.
- Non-avian reptiles rely on their oviposition site for embryonic heating and water absorption, making eggshell properties critical for survival.
- Understanding water absorption mechanisms in reptile eggs and their adaptation to local habitats is essential for evolutionary insights.
Purpose of the Study:
- To elucidate the mechanisms of water absorption in reptile eggshells.
- To investigate how eggshell absorptive capacity varies with the aridity of the species' local habitat.
- To test the hypothesis that absorptive capacity increases with environmental aridity.
Main Methods:
- Histology, Fourier-transform infrared spectroscopy, and dynamic vapor sorption experiments were conducted on 56 reptile species.
- Phylogenetic comparative analysis was employed to correlate eggshell properties with environmental aridity.
- Eggshell composition, including calcium content and the presence of a mucopolysaccharide layer, was analyzed.
Main Results:
- Water absorption is enhanced by a superficial mucopolysaccharide layer and reduced by increased calcium content in eggshells.
- Reptile eggs from arid environments exhibit higher water absorptive capacity, particularly in species with weakly calcified shells.
- Eggshell absorptive capacity is evolutionarily tuned to match the environmental moisture levels of the species' habitat.
Conclusions:
- Reptile eggshells possess adaptable absorptive properties that have evolved in response to environmental moisture availability.
- The findings highlight the intricate balance reptiles maintain between conflicting constraints for successful embryonic development.
- Reptile eggshells offer potential inspiration for developing novel biomimetic materials like water filters and humidity sensors.
More Related Videos
Related Concept Videos
04:01Factors Affecting Solubility
33.4K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
33.4K
02:24Comparative Excretory Systems
19.3K
Animals have evolved different strategies for excretion, the removal of waste from the body. Most waste must be dissolved in water to be excreted, so an animal’s excretory strategy directly affects its water balance.
19.3K
01:33Introduction to Electrolytes
10.2K
In humans, electrolytes play a vital role in various physiological processes. Balancing electrolyte levels is essential for normal body functions; their imbalance can be life-threatening. The major electrolytes include sodium, potassium, chloride, calcium, phosphate, and bicarbonate. They are primarily involved in physiological processes, such as nerve signal transmission, membrane trafficking, muscle contraction, buffering body fluids, and balancing water levels in the body.
Role of Sodium
One...
Role of Sodium
One...
10.2K
01:57Adaptations that Reduce Water Loss
25.5K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.5K