Recent evolution of large offspring size and post-fertilization nutrient provisioning in swordtails
C. Y. Payne, D. Ly, R. A. Rodriguez-Soto, D. L. Powell, N. D. Robles, T. R. Gunn, J. J. Baczenas, A. J. Bergman, A. C. Pollock, B. M. Moran, J. C. Baker, D. Reznick, M. Schumer
This study compares reproductive strategies between two swordtail fish species, finding that X. malinche produces larger, more resilient offspring through extended post-fertilization nutrient provisioning.
Proceedings of the Royal Society B: Biological Sciences · Feb 11, 2026Peer-reviewedEvolutionary Biology