. Commercial fisheries review. Fisheries; Fish trade. Puerto Rico Trench The level floor of the Puerto Rico Trench consists of soft, blue, extremely sticky clay. "The clay is covered with the largest amount of land plant material yet reported from any trench in the world. Pillsbury tows brought up coconut husks, tree seeds, fronds, tree branches, mangrove roots, and turtle grass ; The Trench probably has "the most uni- form, unchanging environment known in the Atlantic Ocean. At 4|- to 5 miles down, there is no light from the sun, temperature 31 is slightly below 2 C.,
. Commercial fisheries review. Fisheries; Fish trade. Puerto Rico Trench The level floor of the Puerto Rico Trench consists of soft, blue, extremely sticky clay. "The clay is covered with the largest amount of land plant material yet reported from any trench in the world. Pillsbury tows brought up coconut husks, tree seeds, fronds, tree branches, mangrove roots, and turtle grass ; The Trench probably has "the most uni- form, unchanging environment known in the Atlantic Ocean. At 4|- to 5 miles down, there is no light from the sun, temperature 31 is slightly below 2 C., and pressure is 800 times greater than on earth's surface. The Trench is over 200 miles long; at its widest point, it is almost 40 miles. At its deepest, the Milwaukee Deep, it is about 28,700 feet (4,780 fathoms). The National Geographic Society/Univer- sity of Miami Deep-Sea Biological Program investigates "the kinds, distribution, and con- centration of marine life in the tropical waters of the Atlantic Ocean from West Africa to the coast of South America and the Caribbean ; DR. J. L McHUGH APPOINTED IDOE COORDINATOR Dr. J. L. McHugh, the former deputy di- rector of BCF, has been appointed head of the new Office for the International Decade of Ocean Exploration (IDOE) by Dr. William D. McElroy, director of the National Science Foundation, The IDOE is an international effort to ex- pand the uses of the oceans--and to design ways toprotect the marine environment from degradation. IDOE's first year will concentrate on three areas: identification of factors that will help manpredict modifica- tions in the oceans caused by nature or by man; investigation of specific oceanic areas with special attention tofood chains and pol- lutants; and studies of selected areas of the ocean bottom to im- prove man's knowledge of it, and to facilitate location of natural Dr. J. L. McHugh. Please note that these images are extracted from scanned page images that may have
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