The Design and Development of an Alternating Current Electronarcosis Unit for Use with Freshwater Fish
Author: W. T. Barham
Publisher:
Published: 1987
Total Pages: 32
ISBN-13:
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Author: W. T. Barham
Publisher:
Published: 1987
Total Pages: 32
ISBN-13:
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Publisher:
Published: 1989
Total Pages: 364
ISBN-13:
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Publisher:
Published: 1995
Total Pages: 342
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Publisher:
Published: 1992
Total Pages: 364
ISBN-13:
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Publisher:
Published: 1989
Total Pages: 774
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DOWNLOAD EBOOKIncludes publications received in terms of Copyright Act no. 9 of 1916.
Author: Jerry Johnson
Publisher: Rowman & Littlefield
Published: 2010-06-16
Total Pages: 185
ISBN-13: 1589795229
DOWNLOAD EBOOKVisitors to Yellowstone National Park are drawn to the spectacular scenery, unique thermal features, and the large numbers of wild animals easily observed in their natural habitat. The thoughtful visitor to the park cannot help but be captivated by the unparalleled breadth of scientific knowledge needed to understand the intricate interrelationships that make up the yellowstone landscape. Knowing Yellowstone explores how scientists discover what they know about America's first national park and the surrounding lands. The chapter authors are scientists who represent the best of their fields of study. The science they describe is leading the way to our understanding of complex ecosystems worldwide.
Author: Ergün Demir
Publisher: Tudás Alapítvány
Published: 2020-01-16
Total Pages: 326
ISBN-13:
DOWNLOAD EBOOKAquaculture is one of the fastest way to produce animal protein for growing population in the World. Aquaculture is the art, science, and business of producing aquatic plants and animals useful to humans. Fish farming is an ancient practice and date back as far as 2500 BC. In Europe, fish raised in ponds became a common source of food during the Middle Ages. Today, aquaculture plays a major role in global fish supply. Today, the global community faces financial and economic crisis, climatic changes and the pressing food and nutrition needs of a growing population with finite natural resources. As the world’s population continues to increase over the coming decades, and global living standards rise, demand for fish is set to keep on growing. With most wild capture fisheries already fully exploited, much of that new demand will have to be met from aquaculture. According to FAO estimates, more than 50 % of all fish for human consumption now comes from aquaculture. Aquaculture is one of the most resource-efficient ways to produce protein. Fish come out well because, in general, they convert more of the feed they eat into body mass than livestock animals. Salmon is the most feed-intensive farmed fish to convert feed to body weigt gain and protein followed by chicken. Aquaculture is the controlled cultivation and harvest of aquatic organisms. Most commonly grown are finfish and shellfish, but other aquatic organisms are also cultivated such as seaweed, microalgae, frogs, turtles, alligators, and endangered species. There are many similarities between aquaculture and agriculture, but there are some important differences as well. Aquaculture, like agriculture, is necessary to meet the food demands of a growing global population with diminishing natural fisheries stocks. Aquaculture and agriculture are both farming. However, aquaculture is farming in the water and therefore requires a different set of knowledge, skill, and technology.
Author: National Research Council Canada
Publisher: NRC Research Press
Published: 1993
Total Pages: 276
ISBN-13: 9780660149547
DOWNLOAD EBOOKUp-to-date information, knowledge and research in progress in scientific fields related to natural production of juvenile Atlantic salmon and some other ecologically similar fluvial salmonids is contained in the 25 papers and 12 abstracts contained in this publication, which were prepared for an international symposium held in St. John's, Newfoundland. Studies relate to stream ecology, invertebrates and predators, habitat improvement, competitive effects, behaviour and dispersal, habitat and production of juvenile salmon, population dynamics and relationships of juvenile salmon estimates to smolt yields. A list of participants at the conference is also provided.
Author: Ulrich Schwevers
Publisher: Springer
Published: 2019-06-24
Total Pages: 289
ISBN-13: 3030192423
DOWNLOAD EBOOKThis book offers a comprehensive review of current systems for fish protection and downstream migration. It offers the first systematic description of the currently available technologies for fish protection at hydropower intakes, including accurate and timely data collected by the authors and other researchers. It describes how to design and test them in agreement with the guidelines established from the EU Water Framework Directive. The book includes important information about fish biology, with a special focus on swimming and migration mechanisms. It offers a robust bridge between concepts in applied ecology and civil hydraulic engineering, thus providing biologists and hydraulic engineers with an authoritative reference guide to both the theory and practice of fish protection. It is also of interest for planners, public authorities as well as environmental consultants