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Author: Stephen Nicol
Publisher: Food & Agriculture Org.
ISBN: 9789251040126
Category : Electronic books
Languages : en
Pages : 116
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Book Description
Euphausiids, or krill, have been harvested since at least the 19th century and possibly earlier (Fisher et al. 1953). It is, however, only in the last 50 years that large scale commercial harvesting of krill has occurred. Despite the widespread distribution of euphausiids throughout the oceans of the world and their undoubted abundance, they have only been harvested in large quantities in two areas - in Antarctic waters and in the coastal waters off Japan. There are, however, experimental or small-scale krill fisheries in other areas and there has been speculation about the potential for such fisheries in still further areas. This report summarises the available knowledge about the existing fisheries and draws together information on other species of euphausiids that have been thought to have commercial potential. A number of other reports have been written on the commercial potential of krill, particularly Antarctic krill (Budzinski et al. 1985; Eddie 1977; Everson 1977; Grantham 1977). Another relatively recent review (Neal and Maris 1985) asessed the harvest of krill in the context of fisheries biology of other shrimps and shrimp-like animals. This report provides additional material to that provided in these reports but no attempt has been made to summarise their content except where it is necessary to understand new developments. Much of the information on the fisheries for Euphausia pacifica is published in Japanese or is published in reports of fisheries agencies. For this reason, the biology of, and the fisheries on, this species are dealt with in some detail utilising these information sources which have not previously been readily available.
Author: Stephen Nicol
Publisher: Food & Agriculture Org.
ISBN: 9789251040126
Category : Electronic books
Languages : en
Pages : 116
Get Book Here
Book Description
Euphausiids, or krill, have been harvested since at least the 19th century and possibly earlier (Fisher et al. 1953). It is, however, only in the last 50 years that large scale commercial harvesting of krill has occurred. Despite the widespread distribution of euphausiids throughout the oceans of the world and their undoubted abundance, they have only been harvested in large quantities in two areas - in Antarctic waters and in the coastal waters off Japan. There are, however, experimental or small-scale krill fisheries in other areas and there has been speculation about the potential for such fisheries in still further areas. This report summarises the available knowledge about the existing fisheries and draws together information on other species of euphausiids that have been thought to have commercial potential. A number of other reports have been written on the commercial potential of krill, particularly Antarctic krill (Budzinski et al. 1985; Eddie 1977; Everson 1977; Grantham 1977). Another relatively recent review (Neal and Maris 1985) asessed the harvest of krill in the context of fisheries biology of other shrimps and shrimp-like animals. This report provides additional material to that provided in these reports but no attempt has been made to summarise their content except where it is necessary to understand new developments. Much of the information on the fisheries for Euphausia pacifica is published in Japanese or is published in reports of fisheries agencies. For this reason, the biology of, and the fisheries on, this species are dealt with in some detail utilising these information sources which have not previously been readily available.
Author: Volker Siegel
Publisher: Springer
ISBN: 331929279X
Category : Science
Languages : en
Pages : 458
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Book Description
This book gives a unique insight into the current knowledge of krill population dynamics including distribution, biomass, production, recruitment, growth and mortality rates. Detailed analysis is provided on food and feeding, reproduction and krill behaviour. The volume provides an overview on the aspects of natural challenges to the species, which involve predation, parasites and the commercial exploitation of the resource and its management. A chapter on genetics shows the results of population subdivision and summarizes recent work on sequencing transcriptomes for studying gene function as part of the physiology of live krill. The focus of Chapter 4 is on physiological functions such as biochemical composition, metabolic activity and growth change with ontogeny and season; and will demonstrate which environmental factors are the main drivers for variability. Further discussed in this chapter are the bottle necks which occur in the annual life cycle of krill, and the mechanisms krill have adapted to cope with severe environmental condition.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309055261
Category : Technology & Engineering
Languages : en
Pages : 189
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Book Description
Fluctuations and declines in marine fish populations have caused growing concern among marine scientists, fisheries managers, commercial and recreational fishers, and the public. Sustaining Marine Fisheries explores the nature of marine ecosystems and the complex interacting factors that shape their productivity. The book documents the condition of marine fisheries today, highlighting species and geographic areas that are under particular stress. Challenges to achieving sustainability are discussed, and shortcomings of existing fisheries management and regulation are examined. The volume calls for fisheries management to adopt a broader ecosystem perspective that encompasses all relevant environmental and human influences. Sustaining Marine Fisheries offers new approaches to building workable fisheries management institutions, improving scientific data, and developing management tools. The book recommends ways to change current practices that encourage overexploitation of fish resources. It will be of special interest to marine policymakers and ecologists, fisheries regulators and managers, fisheries scientists and marine ecologists, fishers, and concerned individuals.
Author: Matt Lilley
Publisher: Tilbury House Publishers and Cadent Publishing
ISBN: 0884488691
Category : Juvenile Nonfiction
Languages : en
Pages : 40
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Book Description
2022 Cybils Award WINNER for Elementary Nonfiction!!! NYPL best books of 2022 California Eureka Silver Honoree award 2022 "To my delight, your average krill is a far stranger story of metamorphosis than anything our butterflies can come up with." - Elizabeth Bird, A Fuse 8 Production A fun exploration of a tiny animal at the base of the ocean food chain Just 2 inches long full-grown, this little guy is the foundation of the Southern Ocean food chain... “Hi. What are you? You appear to be an egg. You are an egg sinking. For many days, you sink. You sink a mile down, and you keep sinking down… down… until…” The unidentified narrator follows one krill among billions as it pursues its brief existence, eating and eating while metamorphosing from one thing into another and trying to avoid being eaten. Questions and advice are hurled at the krill on every page, but the krill never responds—because, after all, krill can’t talk, and this is nonfiction. Krill are the largest animals able to catch and eat phytoplankton, and they in turn are eaten by the largest animals ever to live on earth—blue whales—as well as by seals, penguins, and a host of others. In other words, krill are really good at eating, and they make really good eating. And that makes them the most important animals in the high-latitude oceans. As in The Whale Fall Café, Dan Tavis’s illustrations combine scientific accuracy with Nemo liveliness and humor. Our star krill is so good at gobbling up phytoplankton that he turns green, so we can pick him out from the crowd racing to escape a penguin’s beak or a blue whale’s gaping maw. The book has been reviewed and endorsed by global krill expert Dr. Stephen Nichol, and the manuscript earned an honorable mention in Minnesota’s McKnight Artist Fellowships for Writers. Helpful backmatter is included. The Good Eating manuscript won an honorable mention in Minnesota’s McKnight Artist Fellowships for Writers. Technical review and endorsement from Dr. Stephen Nichol, adjunct professor at the University of Tasmania and author of The Curious Life of Krill.
Author: Dana Hunnes
Publisher: Cambridge University Press
ISBN: 1108832199
Category : Health & Fitness
Languages : en
Pages : 347
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Book Description
Entertaining, easy-to-understand book by dietitian Dr. Dana Ellis Hunnes on how to improve our own and our planet's health.
Author: Daniel Pauly
Publisher: Greystone Books Ltd
ISBN: 1771643994
Category : Technology & Engineering
Languages : en
Pages : 139
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Book Description
"Daniel Pauly is a friend whose work has inspired me for years." —Ted Danson, actor, ocean activist, and co-author of Oceana "This wonderfully personal and accessible book by the world’s greatest living fisheries biologist summarizes and expands on the causes of collapse and the essential actions that will be required to rebuild fish stocks for future generations.” —Dr. Jeremy Jackson, ocean scientist and author of Breakpoint The world’s fisheries are in crisis. Their catches are declining, and the stocks of key species, such as cod and bluefin tuna, are but a small fraction of their previous abundance, while others have been overfished almost to extinction. The oceans are depleted and the commercial fishing industry increasingly depends on subsidies to remain afloat. In these essays, award-winning biologist Dr. Daniel Pauly offers a thought-provoking look at the state of today’s global fisheries—and a radical way to turn it around. Starting with the rapid expansion that followed World War II, he traces the arc of the fishing industry’s ensuing demise, offering insights into how and why it has failed. With clear, convincing prose, Dr. Pauly draws on decades of research to provide an up-to-date assessment of ocean health and an analysis of the issues that have contributed to the current crisis, including globalization, massive underreporting of catch, and the phenomenon of “shifting baselines,” in which, over time, important knowledge is lost about the state of the natural world. Finally, Vanishing Fish provides practical recommendations for a way forward—a vision of a vibrant future where small-scale fisheries can supply the majority of the world’s fish. Published in Partnership with the David Suzuki Institute
Author: Joy McCann
Publisher: University of Chicago Press
ISBN: 022662241X
Category : Nature
Languages : en
Pages : 289
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Book Description
“This bracing history charts the myths, the exploration, and the inhabitants of the all-too-real and wild circumpolar ocean to our south.” —The Sydney Morning Herald, Pick of the Week Unlike the Pacific, Atlantic, Indian, and Arctic Oceans with their long maritime histories, little is known about the Southern Ocean. This book takes readers beyond the familiar heroic narratives of polar exploration to explore the nature of this stormy circumpolar ocean and its place in Western and Indigenous histories. Drawing from a vast archive of charts and maps, sea captains’ journals, whalers’ log books, missionaries’ correspondence, voyagers’ letters, scientific reports, stories, myths, and her own experiences, Joy McCann embarks on a voyage of discovery across its surfaces and into its depths, revealing its distinctive physical and biological processes as well as the people, species, events, and ideas that have shaped our perceptions of it. The result is both a global story of changing scientific knowledge about oceans and their vulnerability to human actions and a local one, showing how the Southern Ocean has defined and sustained southern environments and people over time. Beautifully and powerfully written, Wild Sea will raise a broader awareness and appreciation of the natural and cultural history of this little-known ocean and its emerging importance as a barometer of planetary climate change. “A sensitive portrait of a complex ecosystem, from krill to blue whales, and of the ice, winds, and currents that are critical to the circulation of the world’s oceans.” —Harper’s “Wilderness seekers will rejoice in this stirring portrait . . . McCann deftly navigates both natural glories and archival complexities.” —Nature
Author: Kieran Kelleher
Publisher: Food & Agriculture Org.
ISBN: 9789251052891
Category : Business & Economics
Languages : en
Pages : 156
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Book Description
This publication gives an updated review of the quantity of discards in the world's marine fisheries, using information from a broad range of fisheries in all continents. A number of policy issues are discussed including a 'no discards' approach to fisheries management, the need for balance between bycatch reduction and bycatch utilisation initiatives, and concerns arising from incidental catches of marine mammals, birds and reptiles. The report also highlights the need for more robust methods of estimating discards, and the development of bycatch management plans.
Author: J. A. Gulland
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 292
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Book Description
Author: Jonah Young
Publisher: Ice Press
ISBN:
Category : Science
Languages : en
Pages : 79
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Book Description
Note that this book is based on Wikipedia and other public domain resources. Krill are small crustaceans of the order Euphausiacea, and are found in all the world's oceans. The name krill comes from the Norwegian word krill, meaning "young fry of fish", which is also often attributed to other species of fish. Krill are considered an important trophic level connection – near the bottom of the food chain – because they feed on phytoplankton and to a lesser extent zooplankton, converting these into a form suitable for many larger animals for whom krill makes up the largest part of their diet. In the Southern Ocean, one species, the Antarctic krill, Euphausia superba, makes up an estimated biomass of around 379 million tons, more than that of humans. Of this, over half is eaten by whales, seals, penguins, squid and fish each year, and is replaced by growth and reproduction. Most krill species display large daily vertical migrations, thus providing food for predators near the surface at night and in deeper waters during the day.
