Shallow-water Reeffish Fishery (PR,VI) PDF Download
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Category :
Languages : en
Pages : 50
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Author:
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Languages : en
Pages : 50
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Category :
Languages : en
Pages : 280
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Author: Polunin Nicholas V.C.
Publisher: Springer Science & Business Media
ISBN: 9401587795
Category : Science
Languages : en
Pages : 488
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Book Description
Reef ecosystems extend throughout the tropics. Exploited by small-scale fishers, reefs supply food for millions of people, but, worldwide, there are growing worries about the productivity and current state of these ecosystems. Reef fish stocks display many features of fisheries elsewhere. However, habitat spatial complexity, biological diversity within and among species, ecosystem intricacy and variable means of exploitation make it hard to predict sustainable modes and levels of fishing.
Author: Oleg P. Martens
Publisher:
ISBN:
Category : Reef fisheries
Languages : en
Pages : 56
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Author: Richard S. Appledoorn
Publisher:
ISBN:
Category : Fish stock assessment
Languages : en
Pages : 150
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Author: Yvonne Sadovy de Mitcheson
Publisher: Springer Science & Business Media
ISBN: 9400719795
Category : Science
Languages : en
Pages : 639
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Book Description
Reef fish spawning aggregations, ranging from small groups to many tens of thousands of individuals, are spectacular but poorly known natural phenomena whereby fish assemble at specific times and locations to spawn. For some species these large groups may be the only form of reproduction, the high fish numbers briefly giving a false impression of stability and abundance—an ‘illusion of plenty’. They are often a focus for intensive seasonal fishing because of their predictability and because many important commercial fishes form them. Highly vulnerable to overexploitation, many aggregations and their associated fisheries, have disappeared or are in decline. Few are effectively managed or incorporated into protected areas. Aggregations are not well understood by fishery scientists, managers and conservationists and their significance little appreciated by fishers or the wider public. To ensure their persistence to replenish important fisheries in coral ecosystems, maintain their ecosystem function and continue to delight divers, a significant change in perspective is needed to foster protection and management. This book provides comprehensive and practical coverage of the biology, study and management of reef fish aggregations, exploring their how, when, where, and why. It explores ways to better protect, study, manage and conserve them, while identifying key data gaps and questions. The text is extensively illustrated with many unique, never before published, photographs and graphics. Case studies on over 20 interesting and important fishes are included, outlining their biology and fisheries and highlighting major concerns and challenges.
Author: C. Herb Ward
Publisher: Springer
ISBN: 1493934562
Category : Technology & Engineering
Languages : en
Pages : 948
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Book Description
This book is open access under a CC BY-NC 2.5 license. The Gulf of Mexico is an open and dynamic marine ecosystem rich in natural resources but heavily impacted by human activities, including agricultural, industrial, commercial and coastal development. The Gulf of Mexico has been continuously exposed to petroleum hydrocarbons for millions of years from natural oil and gas seeps on the sea floor, and more recently from oil drilling and production activities located in the water near and far from shore. Major accidental oil spills in the Gulf are infrequent; two of the most significant include the Ixtoc I blowout in the Bay of Campeche in 1979 and the Deepwater Horizon Oil Spill in 2010. Unfortunately, baseline assessments of the status of habitats and biota in the Gulf of Mexico before these spills either were not available, or the data had not been systematically compiled in a way that would help scientists assess the potential short-term and long-term effects of such events. This 2-volume series compiles and summarizes thousands of data sets showing the status of habitats and biota in the Gulf of Mexico before the Deepwater Horizon Oil Spill. Volume 2 covers historical data on commercial and recreational fisheries, with an analysis of marketing trends and drivers; ecology, populations and risks to birds, sea turtles and marine mammals in the Gulf; and diseases and mortalities of fish and other animals that inhabit the Gulf of Mexico.
Author: Field,
Publisher: Routledge
ISBN: 1317847881
Category : Social Science
Languages : en
Pages : 193
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Book Description
First published in 1998. Routledge is an imprint of Taylor & Francis, an informa company.
Author: David A. Ross
Publisher: Stackpole Books
ISBN: 9780811727716
Category : Science
Languages : en
Pages : 324
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Book Description
Tides, currents, fish senses and behavior "Reading Dave Ross's work will give you in-depth knowledge of the ocean, its processes, and marine fish, which can only make you a better saltwater angler."--Joe Healy editor, Saltwater Fly Fishing Here at last, in layman's terms, is a fisherman's guide to the habitat and behavior of saltwater fish. The author, an oceanographer and avid fly fisherman, explains the marine environment and the factors that affect where game fish congregate, how they move with tides and currents, what they see, smell, taste, and hear. The copiously illustrated text covers inshore and offshore habitat and will prove invaluable to anyone who fishes in saltwater, whether in the surf, on the flats, or out at sea. The ocean is vast. It pays to be educated.
Author:
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ISBN:
Category :
Languages : en
Pages : 448
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