Reproductive Biology and Phylogeny of Chondrichthyes

<p>Internal fertilization is universal in chondrichthyan fishes and as such requires a suite of biological activities including behavioral morphological and physiological mechanisms to ensure successful copulation and fertilization. This volume correlates available data and ideas concerning the development reproductive morphology function and phylogeny of chondrichthyan fishes. Coverage includes oogenesis spermatogenesis gestation regulation of reproductive tract function sperm storage nutrient provision placentation and phylogeny. New and exciting data is presented including the idea that yolk sac viviparity is the plesiomorphic state rather than oviparity.</p>