THE NATURALIZED FISHES OF THE WORLD. By Christopher Lever.

"This book describes where, when, how and by whom the alien inland fishes now living in a wild state throughout the world were introduced, how they subsequently became naturalized and what, if any, effects they have had in their new environment". Feral fish occur all over the world, having their origin in sporting and ornamental introductions, fish farm escapees and attempts at biological control of various pests. Detailed examination of this important ecological phenomenon by a leading authority on species introduction, and author of The Naturalized Animals of the British Isles, and other works on introduced mammals, birds, reptiles and amphibians. * This copy is inscribed on the half-title by the author, to the noted ichthyologist Alwyne Wheeler. Wheeler's bookplate is on the front end-paper and two notes from the author to Wheeler, thanking him for his assistance, are laid in.