Author: Texas
Publisher:
ISBN:
Category : Game-laws
Languages : en
Pages :

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Author: Frank S. Shipley
Publisher:
ISBN:
Category : Ecosystem management
Languages : en
Pages : 256

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Author: Sewell Hepburn Hopkins
Publisher:
ISBN:
Category : Clams
Languages : en
Pages : 270

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Book Description
In the search for a laboratory test that could be used to determine when estuarine salinity changes were favorable or unfavorable, salinities in the range from 0 to 38 were tested on adult Rangia clams for effects on survival; regulation of internal salinity; intake, use and release of amino acids; respiration; glycogen use under aerobic and anaerobic conditions; feeding rate; ciliary activity; uptake of glucose; glycogen storage and 'index of condition' in natural environments through a seasonal cycle; carbohydrate-digesting enzymes; and reproduction. It was determined that Rangia cuneata has a system of compensating reactions that allows it to adjust to changes in salinity over the range from 0 to 38 ppt and over the temperature range from 10 to 35C without harm. It was concluded from these and further studies that the key to the welfare of a Rangia population is not the physiology of the adult individuals, but reproduction and recruitment. The keys to the use of Rangia cuneata as an indicator were found to be two facts: (1) a change in salinity, either up from near 0 or down from 15 ppt and above, is necessary to induce spawning; (2) the embryos and early larvae can survive only in salinities between 2 and 10 (or 15) ppt. (Modified author abstract).

Author: Joseph R. Geraci
Publisher: National Aquarium in Baltimore
ISBN: 0977460908
Category : Marine mammals
Languages : en
Pages : 386

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Book Description
Comprehensive manual for understanding and carrying out marine mammal rescue activities for stranded seals, manatees, dolphins, whales, or sea otters.

Author:
Publisher:
ISBN:
Category : State government publications
Languages : en
Pages : 838

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Author: United States. Department of the Interior. Library
Publisher:
ISBN:
Category : Library catalogs
Languages : en
Pages : 820

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Author: Citizens Against Government Waste
Publisher: St. Martin's Griffin
ISBN: 146685314X
Category : Political Science
Languages : en
Pages : 212

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Book Description
The federal government wastes your tax dollars worse than a drunken sailor on shore leave. The 1984 Grace Commission uncovered that the Department of Defense spent $640 for a toilet seat and $436 for a hammer. Twenty years later things weren't much better. In 2004, Congress spent a record-breaking $22.9 billion dollars of your money on 10,656 of their pork-barrel projects. The war on terror has a lot to do with the record $413 billion in deficit spending, but it's also the result of pork over the last 18 years the likes of: - $50 million for an indoor rain forest in Iowa - $102 million to study screwworms which were long ago eradicated from American soil - $273,000 to combat goth culture in Missouri - $2.2 million to renovate the North Pole (Lucky for Santa!) - $50,000 for a tattoo removal program in California - $1 million for ornamental fish research Funny in some instances and jaw-droppingly stupid and wasteful in others, The Pig Book proves one thing about Capitol Hill: pork is king!

Author: National Research Council
Publisher: National Academies Press
ISBN: 0309174406
Category : Technology & Engineering
Languages : en
Pages : 194

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Ocean harvests have plateaued worldwide and many important commercial stocks have been depleted. This has caused great concern among scientists, fishery managers, the fishing community, and the public. This book evaluates the major models used for estimating the size and structure of marine fish populations (stock assessments) and changes in populations over time. It demonstrates how problems that may occur in fisheries dataâ€"for example underreporting or changes in the likelihood that fish can be caught with a given type of gearâ€"can seriously degrade the quality of stock assessments. The volume makes recommendations for means to improve stock assessments and their use in fishery management.

Author:
Publisher:
ISBN:
Category : Education
Languages : en
Pages : 1034

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Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251306079
Category : Technology & Engineering
Languages : en
Pages : 654

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Book Description
This report indicates that climate change will significantly affect the availability and trade of fish products, especially for those countries most dependent on the sector, and calls for effective adaptation and mitigation actions encompassing food production.