shellfisheries group at the North Carolina Division of 

 Marine Fisheries provided useful advice, especially 

 M. Marshall, F. Munden, D. Spitsbergen, and M. 

 Street. M. S. Fonseca, G. W. Thayer, and two anony- 

 mous reviewers helped improve the manuscript. This 

 study was sponsored by the University of North Car- 

 olina Institute of Marine Sciences and by the Office 

 of Sea Grant, NOAA, U. S. Department of Commerce 

 under grant No. NA81AA-D-00026, North Carolina 

 Department of Administration. 



Beaufort, North Carolina. Ecol. Monogr. 47:425-446. 

 Thayer, G. W., D. A. Wolfe, and R. B. Williams. 



1975. The impact of man on seagrass systems. Am. Sci. 

 63:288-296. 



Charles H. Peterson 



Henry C. Summerson 



Stephen R. Fegley 



Institute of Marine Sciences 



University of North Carolina at Chapel Hill 



Morehead City, NC 2855 7 



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Caddy, J. F. 



1973. Underwater observations on tracks of dredges and 

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Folk, R. L. 



1974. Petrology of sedimentary rocks. Hemphill Publ. Co., 

 Austin, Tex., 182 p. 



Glude, J. B., and W. S. Landers. 



1953. Biological effects on hard clams of hand raking and 

 power dredging. U. S. Fish Wildl. Serv., Spec. Sci. Rep. 

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 Ingram, R. L. 



1971. Sieve analysis. MR. E. Carver (editor), Procedures in 

 sedimentary petrology, p. 49-67. Wiley- Interscience, N.Y. 



MEDCOF, J. C, AND J. S. MACPHAIL. 



1964. Fishing efficiency of clam hacks and mortalities inci- 

 dental to fishing. Proc. Natl. Shellfish. Assoc. 55:53-72. 

 Nelson, W. G. 



1979. An analysis of structural pattern in an eelgrass (Zostera 

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O'GOWER, A. K., AND J. W. WACASEY. 



1967. Animal communities associated with Thalassia, Dip- 

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1977. The importance of sediment stability in seagrass com- 

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1977. Development and stability of the fouling community at 



HETEROCARPUS LONGIROSTRIS 



MacGILCHRIST FROM 



THE NORTHERN MARIANA ISLANDS 



In March and April 1981 the National Marine Fish- 

 eries Service Honolulu Laboratory chartered the FV 

 Typhoon to conduct a fisheries resource survey in the 

 waters of the Commonwealth of the Northern Mari- 

 ana Islands. One of the major objectives of this sur- 

 vey was the investigation of deepwater pandalid 

 shrimp stocks. Although not previously recognized 

 as a species of commercial interest (Holthuis 1980), 

 Heterocarpus longirostris MacGilchrist 1905 was 

 caught in sufficient numbers on this cruise to suggest 

 a commercial potential. 



Heterocarpus longirostris has been recorded in the 

 literature from a few specimens caught in the Indian 

 Ocean. MacGilchrist (1905) reported taking two 

 male specimens at 1,754 m in the Bay of Bengal; 

 Balss (1925), one female specimen taken at 1,143 m 

 off Nias Island, Sumatra; and Caiman (1939), one 

 female specimen taken at 9 1 4- 1 ,463 m in the Maldive 

 area. Catches from this cruise constitute a first 

 record of this species from the Pacific Ocean. 

 Heterocarpus longirostris is very similar to H. laevi- 

 gatus in general morphology. Heterocarpus longiros- 

 tris differs from H. laevigatus in that the preorbital 

 dorsal surface of the rostrum is multidentate and 

 there is a blunt point posteriorly on the carina of the 

 third abdominal somite. In H. laevigatus the dorsal 

 surface of the rostrum is edentate in advance of the 

 orbit and the posterior portion of the third abdominal 

 somite is rounded. Further differences are discussed 

 in MacGilchrist (1905). 



The FV Typhoon fished for shrimp in the Saipan- 

 Tinian area using traps baited with chopped fish, 

 usually skipjack tuna, Katsuwonus pelamis. The 

 traps consisted of half-round frames of iron rebar (9 1 

 X 72 X 42 cm) wrapped with 13 X 25 mm or 13 X 13 



434 



FISHERY BULLETIN: VOL. 81, NO. 2, 1983. 



