Krill

Krill, or euphausiids, a group of immense importance in marine ecosystems, comprises over 80 species, most of which are planktonic. Krill are widespread with species to be found in all the oceans of the world. Their numerical density in some regions increases their importance to marine ecosystems and has led to commercially successful krill harvesting. This comprehensive volume, thoroughly edited by Inigo Everson, well known for his work in this area, comprises chapters written by internationally acknowledged experts. The contents include coverage of: sampling and distribution, population, aggregation, reproduction and the role of krill in the ecosystem. Further specific chapters include krill harvesting, products and details of management in Japanese, Canadian and Southern Ocean waters. Drawing on the experience in each, the ecosystem approach to management is discussed in detail and how it might be applied more widely for example in forage fisheries. This most important volume draws together, for the first time, a vast amount of vital information for all those involved in work on these important marine organisms. Krill will be of great use to fisheries scientists, marine biologists and ecologists, oceanographers, zoologists and invertebrate biologists and all those involved in the commercial harvesting, exploitation and management of krill, world wide. Libraries in all aquatic and marine research stations and universities where marine and fisheries sciences are studied and taught should have multiple copies of this landmark publication on their shelves. Contributions from internationally-recognised experts in the field. Well-edited to provide an accessible and user-friendly book. Krill are a key part of ocean ecosystems. Part of exciting new Blackwell Science Series.

Series Foreword v Acknowledgements ix List of Contributors x Chapter 1 Introducing Krill 1 Inigo Everson Chapter 2 Sampling Krill 8 2.1 Direct sampling 8 Jon Watkins 2.2 Acoustic estimation of krill abundance 20 Michael Macaulay 2.3 Biological observations 33 Inigo Everson Chapter 3 Distribution and Standing Stock 40 3.1 Japanese waters 40 Yoshi Endo 3.2 Canadian waters 53 Inigo Everson 3.3 The Southern Ocean 63 Inigo Everson Chapter 4 Aggregation and Vertical Migration 80 Jon Watkins Chapter 5 Population Parameters 103 Volker Siegel and Stephen Nicol Chapter 6 Reproduction in Euphausiacea 150 Robin Ross and Langdon Quetin Chapter 7 Role of Krill in Marine Food Webs 182 7.1 Japanese waters 182 Yoshi Endo 7.2 Canadian waters 190 Ron Tanasichuk 7.3 The Southern Ocean 194 Inigo Everson Chapter 8 Ecosystem Dynamics Involving Krill 202 Inigo Everson Chapter 9 Krill Harvesting 228 Taro Ichii Chapter 10 Products Derived from Krill 262 Stephen Nicol, Ian Forster and John Spence Chapter 11 Management of Krill Fisheries in Japanese Waters 284 Yoshi Endo Chapter 12 Management of Krill Fisheries in the Southern Ocean 300 Denzil Miller and David Agnew Chapter 13 Management of Krill Fisheries in Canadian Waters 338 Inigo Everson Chapter 14 Krill Fisheries and the Future 345 Inigo Everson, David Agnew and Denzil Miller Glossary 349 Index 355 Taxonomic index 369 List of Abbreviations 371 Please note: the plate section falls between pp. 182 and 183.