The commercial aspects of spiny lobster farming

The Florida spiny lobster, Panulirus argus, is an important item in Florida fisheries, rating high among fishery products. The fishery is centered in south Florida and the Florida Keys but the commercial range may extend into other areas as more exploratory research is done. The majority of the catch is made using wooden traps and discarded ice cans, but large numbers are taken at certain times of the year in bully nets, shrimp trawls, and by hand. The catch is sold alive. The U. S. catches cannot satisfy the demand for this tasty product and each year millions of pounds are imported from South America, Africa, Australia, and other countries. Because of the fairly high market price placed on this animal and because of the large number imported, several persons have become interested in the artificial propagation of the spiny lobster and have requested information on the commercial feasibility of lobster farming. It is for that reason this paper is prepared. (4 page document

Law for the Illinois farmer / 1079

"This circular replaces Circular 886."Cover title

The 15 meter hoop-column antenna dynamics: Test and analysis

A 15 meter model of the hoop-column antenna concept has been vibration tested for model characterization and analytical model verification. Linear finite element analysis predicted the global vibration frequencies accurately. Good agreement between analysis and test data was obtained only after the analytical model was refined using static test data. As structures become more flexible, structural properties determined from static data become more accurate and should be used to update analytical models. Global vibration modes are not significantly affected by the surface mesh which permits simplified analytical models to be used for prediction of global behavior. These reduced models are believed sufficient for preliminary design and controls simulations where only global behavior is desired. The mesh modes were highly damped due to the knit mesh used for the reflector surface. These modes were also highly coupled and very difficult to measure in the laboratory. The inability to fully characterize the antenna mesh modes in the laboratory indicates robust methods for active surface vibration suppression will be needed. Fortunately, the surface mesh exhibits high passive damping which should be beneficial to active control systems