Electronic Journal of Differential Equations, Vol. 2001(2001), No. 52, pp. 1-18. Title: A priori bounds and global existence for a strongly coupled quasilinear parabolic system modeling chemotaxis Author: Hendrik J. Kuiper (Arizona State Univ., Tempe, AZ, USA) Abstract: A priori bounds are found for solutions to a strongly coupled reaction-diffusion system that models competition of species in the presence of chemotaxis. These bounds are used to prove the existence of global solutions. Submitted May 14, 2001. Published July 19, 2001. Math Subject Classifications: 35K57, 35B45. Key Words: Strongly coupled; reaction-diffusion; chemotaxis.