949 resultados para [JEL:E4] Macroeconomics and Monetary Economics - Money and Interest Rates
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Jellyfishes have functionally replaced several overexploited commercial stocks of planktivorous fishes. This is paradoxical, because they use a primitive prey capture mechanism requiring direct contact with the prey, whereas fishes use more efficient visual detection. We have compiled published data to show that, in spite of their primitive life-style, jellyfishes exhibit similar instantaneous prey clearance and respiration rates as their fish competitors and similar potential for growth and reproduction. To achieve this production, they have evolved large, water-laden bodies that increase prey contact rates. Although larger bodies are less efficient for swimming, optimization analysis reveals that large collectors are advantageous if they move through the water sufficiently slowly.
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"Serial 96-27."
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Mode of access: Internet.
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National Highway Traffic Safety Administration, Washington, D.C.
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As presently used, the immersed weight rate, I sub l, is the volume rate, Q, of longshore transport, multiplied by a constant. For use in engineering problems, I sub l must be converted back to the equivalent Q. The I sub l formulation may be important where the unit weight of sand differs significantly from the unit weight of sand at the open-coast sites contributing data to the design curve. Increase in void ratio may result in a 10- to 20-percent increase in actual (as compared to predicted) shoaling volumes where sand accumulates in protected water. Void ratio should be measured in field studies of longshore transport.
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Mode of access: Internet.
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Mode of access: Internet.
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Cover title.
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WI docs. no.: Cmp.6/3:1971-1978
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Mode of access: Internet.
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Mode of access: Internet.
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Description based on 1991-1992; title from caption.
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Title varies slightly.
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Cover title.
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Reproduction of original in: Public Archives of Canada. Library.