. Pesca commerciale di revisione. La pesca e il commercio di pesce. ROYAL-Gamberi rossi concentrati in 3 potenziali aree commerciali del royal-gamberi rossi (Hymenopenoeus robustus) è una specie sottoutilizzate. Anche se si tratta di una tipica penaeid si differenzia da com- mercial penaeids del genere Penaeus essere- cause predilige profonde, acqua fredda. Essa abita il superiore pendio continentale dal lontano nord. come Cape Hatteras, Carolina del Nord, a sud fino alla costa della Guyane in Sud America. Ma è abbondante solo in alcune aree. Poco si sa della sua biologia, Partec- ularly la sua riproduzione e i primi anni di vita la storia

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. Commercial fisheries review. Fisheries; Fish trade. ROYAL-RED SHRIMP CONCENTRATED IN 3 POTENTIAL COMMERCIAL AREAS The royal-red shrimp (Hymenopenoeus robustus) is an underused species. Although it is a typical penaeid, it differs from com- mercial penaeids of the genus Penaeus be- cause it prefers deep, cold water. It inhabits the upper Continental Slope from as far north. as Cape Hatteras, North Carolina, to as far south as the coast of the Guianas in South America. But it is abundant in only a few areas. Little is known of its biology, partic- ularly its reproduction and early life history, 3 Potential Commercial Areas Royal-red shrimp concentrations in the Gulf of Mexico were discovered in 1950. Since then, BCF's Exploratory Fishing and Gear Research Base, Pascagoula, Miss., has made periodic trawling surveys along the Continen- tal Slope from North Carolina to Brazil to evaluate the commercial potential. The re- sults indicate that three grounds off the U.S. coast support commercial quantities of royal- red shrimp: east of St. Augustine, Florida, in the western Atlantic; south-southwest of the Dry Tortugas in the Florida Straits; and southeast of the Mississippi River Delta in the Gulf of Mexico. How Catch Divided Preliminary records indicate the 1968 U.S. commercial catch of royal-red shrimp was less than 120, 000 pounds (heads-off). Of this total, 53% came from the Mississippi River Delta area, 39% from off St. Augustine, and 8% from Dry Tortugas area. Soft Bottom, 8°-120 C. The distribution of royal-red shrimp is restricted to soft-bottom types and to water temperatures of 8° to 12° C. The highest shrimp concentration is in 9° to 10° C. water. Shrimp densities vary seasonally on all three grounds. Late summer and fall are periods of high density on the St. Augustine and Mississippi Delta grounds; late spring and summer for the Dry Tortugas grounds. Depth Distribution Varies Seasonally The depth distribution of shrimp also varies seasonally: the shrimp m

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