This 2006 book examines the ecology of spiny-headed worms and how they survive successfully in aquatic and terrestrial systems.Acanthocephalans, commonly known as the spiny-headed worms, are parasites found in the intestines of many vertebrate hosts, both aquatic and terrestrial. This 2006 book details the ecology of the acanthocephalans, revealing the reasons for their huge success. Essential reading for graduate students and researchers in parasitology, ecology and zoology.Acanthocephalans, commonly known as the spiny-headed worms, are parasites found in the intestines of many vertebrate hosts, both aquatic and terrestrial. This 2006 book details the ecology of the acanthocephalans, revealing the reasons for their huge success. Essential reading for graduate students and researchers in parasitology, ecology and zoology.Acanthocephalans, or spiny-headed worms, are endoparasites found in almost all marine, freshwater and terrestrial systems. They infect a huge range of definitive and intermediate hosts during their life cycles, including both vertebrates and arthropods. This volume, first published in 2006, examines the distribution and abundance of the Acanthocephala, and uses this ecological information to reveal the group's enormous survival success. It discusses how the acanthocephalans have evolved differently to all other groups of parasites, and represent a distinct and alternative pathway of parasite evolution and host parasite-interactions. Written for graduate students and researchers in parasitology, ecology and zoology or anyone interested in reading about parasite ecology and evolution.Preface; 1. Introduction; 2. Life cycles and transmission; 3. Biogeography and distribution; 4. Specificity; 5. Hostparasite interactions; 6. Population dynamics; 7. Community dynamics; 8. Introductions and extinctions; 9. Relations to ecosystem changes; 10. Conclusions; References; Index.'The book has been produced with care, both by the author and the publisher, and islS1