Download or read book Reproductive Biology and Phylogeny of Fishes, Vol 8B: Part B: Sperm Competion Hormones written by Barrie G M Jamieson and published by CRC Press. This book was released on 2019-07-28 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: The animals loosely termed fish constitute more than half of all known vertebrate species. There are approximately 27,000 described living species of bony fishes (Euteleostomi = Osteichthyes), about 70 species of hagfishes and some 34 species of lampreys. Approximately 970 species are chondrichthyans, the sharks and their relatives, which were the