Table 6.— Summary of data collected on shrimps caught in the northeastern Chukchi and western Beaufort Seas during August-Septem- 

 ber 1977. 



Eualus fabricii was caught in only two trawls at depths of 50 and 

 60 m. Size range was 7-10 mm CL. None was ovigerous. Else- 

 where they are reported from the Japan Sea and the east Siberian 

 coast to Alaska, the Arctic Ocean off Alaska, and the northwest 

 Atlantic, at 4-200 m (Squires 1970). 



Eualus suckleyi was identified from four trawls at depths of 

 50-1 10 m. No further information was noted for these specimens. 



Lebbeus polaris was present in 12 trawls at depths of 50-150 m. 

 Size range was 4-16 mm CL with modal sizes at 6 and 10 mm. 

 Three percent of all individuals were ovigerous with the smallest 

 ovigerous female measuring 12 mm. Squires (1970) in the Cana- 

 dian Arctic reported the smallest ovigerous female to be 10 mm. In 

 this trawl series L. polaris was found mainly east of Barrow. 

 MacGinitie (1955) caught three specimens off Barrow. Squires 

 (1970) summarized distributional information forZ.. polaris as fol- 

 lows: in the North Atlantic from the polar regions to Skaggerak and 

 the Hebrides in Europe, to Cape Cod in America, in the North 

 Pacific from the Aleutians, and Bering and Okhotsk Seas, at 0-930 

 m. 



Six specimens of Lebbeus groenlandicus v/ere caught at three 

 stations in depths of 50-80 m. Carapace length ranged from 13 to 

 22 mm. A single individual (22 mm CL) was ovigerous. Lebbeus 

 groenlandicus is present in the North Atlantic from east and west 

 Greenland and from the Canadian Arctic to Cape Cod, in the North 

 Pacific from arctic Alaska, the Bering Sea to Puget Sound, and the 

 Sea of Okhotsk at depths <200 m (Squires 1970). 



Spironiocaris spina was caught in 2 1 trawls at depths of 45-400 

 m. It was the fourth most numerous species of shrimp. Carapace 

 lengths ranged from 5 to 16 mm with the main size mode at 9 mm. 

 Thirty-six percent of all individuals were ovigerous and the small- 

 est ovigerous female measured 7 mm CL. This species seemed to 

 prefer rocky bottoms although it occurred at least once on a hard 

 mud bottom. Spironiocaris spina is circumpolan It is widespread in 

 the North Atlantic, in the North Pacific from arctic Alaska, Bering 

 Strait. Bering Sea, the Siberian east coast to the Alaska Peninsula 

 and Vancouver, B.C. (Rathbun 1904: Squires 1970). 



A single specimen of Spironiocaris phippsi was caught in 1977 in 

 50 m of water in the eastern part of the study area. Twenty-four 

 individuals were caught in a single trawl off Pitt Point in 1976 at 40 

 111. Distribution is circumpolan It occurs from arctic Alaska to the 



Shumagins, the Atlantic coast of America southward to Cape Cod, 

 off northern Europe, in 10-250 m (Rathbun 1904). 



Family Pandalldae.— We caught a single species of pandalid 

 shrimp, Pandalus goniurus. Pandalus borealis was also reported 

 near Point Barrow by MacGinitie (1955). Pandalus goniurus 

 occurred in 12 trawls at depths of 40-400 m. Only 3% of the indi- 

 viduals were caught east of Pmdhoe Bay. Individuals ranged from 7 

 to 25 mm CL. Although total sample size was relatively small (59) 

 there appeared to be three size modes at 9, 13, and 19 mm. Seven 

 percent of all individuals were ovigerous, the smallest ovigerous 

 female measuring 16 mm CL. According to Rathbun (1904) P 

 goniurus ranges from the arctic coast of Alaska southward to the 

 Okhotsk Sea and Puget Sound, in 5-250 m. Occurrence in water > 

 100 m is unusual. 



Family Crangonidae.— Five species of crangonid shrimps were 

 identified. Of these five, only one, Sabinea sepiemcarinata. was 

 widespread and abundant. 



Sabinea sepieincarinala, the second most numerous shrimp in 

 our samples, was collected in 28 trawls at depths of 40-400 m. It 

 was the most numerous shrimp species in 15 trawls, all of which 

 were east of Barrow. Sabinea occurred west of Point Barrow, but 

 only in very low numbers ( < 3% of the total shrimp catches). Car- 

 apace lengths ranged from 6 to 19 mm, with modes at 10 and 16 

 mm. Only 7% of all individuals were ovigerous and the smallest 

 ovigerous female was 16 mm, considerably larger than the smallest 

 ovigerous female (10 mm) reported by Squires (1970) for the east- 

 ern Canadian Arctic. Sabinea sepiemcarinata is widely distributed 

 throughout the North Atlantic. It occurs in the Beaufort Sea and the 

 east Siberian Sea at 45-345 m (Squires 1970). 



Sclerocrangon boreas was present in only four trawls, all west of 

 Point Barrow, in 44-102 m. Only two rocky bottom stations 

 occurred west of Barrow and 5. boreas was the dominant shrimp at 

 both of those stations. Carapace lengths ranged from 13 to 25 mm 

 with modes at 15 and 20 mm. No ovigerous females were pre.sent. 

 Leech egg cases, reported by MacGinitie (1955) to be Crangonob- 

 delki murmanica, were present on the pleopods of several individ- 

 uals. Sclerocrangon boreas is primarily an arctic species. It is 

 present throughout the North Atlantic, in the North Pacific from 



