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Research Paper | Zoology Science | Volume 15 Issue 3, March 2026 | Pages: 1270 - 1272 | India
Why Natural Selection Differs from Sexual Selection: Exceptions from Reptiles
Abstract: The distinction between natural selection and sexual selection represents a fundamental concept in evolutionary biology, yet their interaction remains complex and context-dependent. Natural selection primarily promotes traits that enhance survival and ecological fitness, whereas sexual selection favours traits that increase reproductive success, often at the cost of survival. This study examines the conceptual differences between these two mechanisms and explores their interaction in reptiles, a group in which sexual selection is generally considered limited. By integrating principles of evolutionary ecology with morphological observations, particularly in crocodilians, this paper highlights how natural and sexual selection may operate simultaneously. The case of Gavialis gangeticus demonstrates a unique overlap where feeding adaptations driven by natural selection are modified by sexually selected traits for mate attraction. These findings suggest that, although sexual selection is less pronounced in reptiles, specific ecological and evolutionary conditions can facilitate its emergence and significance.
Keywords: Natural selection, sexual selection, reptiles, evolutionary ecology, crocodilians, morphological adaptation
How to Cite?: Debanik Mukherjee, M. Vijay, "Why Natural Selection Differs from Sexual Selection: Exceptions from Reptiles", Volume 15 Issue 3, March 2026, International Journal of Science and Research (IJSR), Pages: 1270-1272, https://www.ijsr.net/getabstract.php?paperid=SR26321103205, DOI: https://dx.dx.doi.org/10.21275/SR26321103205