somites 3, 4, and 5 barely reach mar- 

 gin of somite C.japonicus 



3b. Posterior lateral spines on abdominal 

 somites 3, 4, and 5 extend beyond margin 

 of somite C. bairdi 



Literature Cited 



Garth, J. S. 



1958. Brachyura of the Pacific coast of America. 

 Oxyrhyncha. Allan Hancock Pac. Exped. 21, 854 p. 

 HART, J. F. L. 



1960, The larval development of British Columbia 

 Brachyura. II. Majidae, subfamily Oregoniinae. Can. J. 

 Zool. 38:539-546. 

 HAYNfES, E. 



1973. Descriptions of prezoeae and stage I zoeae of 

 Chionoecetes bairdi and C. opilio (Oxyrhyncha, 

 Oregoniinae). Fish. Bull., U.S. 71:769-775. 

 JEWETT, S. C, AND R. E. HAIGHT. 



1977. Description of megalopa of snow crab, Chionoecetes 

 bairdi (Majidae, subfamily Oregoniinae). Fish. Bull., 

 U.S. 75:459-463. 

 KAMITA, T. 



1941. Studies on the decapod crustaceans of Chosen. Part 

 I. Crabs. Fish. Soc. Chosen, Keijo, Jpn., 289 p. 

 KURATA.H. 



1963. Larvae of Decapoda Crustacea of Hokkaido. 2. 

 Majidae (Pisinae). [In Jpn., Engl, summ.] Bull. Hok- 

 kaido Reg. Fish. Res. Lab. 27:25-31. (Fish. Res. Board 

 Can., Transl. Ser 1124.) 

 MOTOH, H. 



1973. Laboratory-reared zoeae and megalopae of Zuwai 

 crab from the Sea of Japan. Bull. Jpn. Soc. Sci. Fish. 

 39:1223-1230. 

 RATHBUN, M. J. 



1924. New species and subspecies of spider crabs. Proc. 

 U.S. Natl. Mus. 64(2504), 5 p. 

 STEPHENSEN.K. 



1935. Crustacea Decapoda. The Godhaab Expedition, 

 1928. Medd. Gr0nl. 80(1), 94 p. 

 TRASKY, L. L., L. B. FLAGG, AND D. C. BURBANK. 



1977. Impact of oil on the Kachemak Bay environment. 

 In L. L. Trasky L. B. Flagg, and D. C. Burbank (editors). 

 Environmental studies of Kachemak Bay and lower Cook 

 Inlet, Vol. 1, 123 p. Alaska Dep. Fish Game, Anchorage. 

 YAMAURO, A. 



1968. On distinguishing the young stages of tanner 

 crab and red tanner crab. Renraku News 210:2-3. Jpn. 

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 Fish. [Transl.], Wash., D.C.) 



EVANHAYNES 



Northwest and Alaska Fisheries Center Auke Bay Laboratory 



National Marine Fisheries Service, NOAA 



P.O. Box 155 



Auke Bay, AK 99821 



FEEDING RATE OF CAPTIVE ADULT 



FEMALE NORTHERN FUR SEALS, 



CALLORHINUS URSINUS^ 



Overexploitation of fishery stocks in the North 

 Pacific and Bering Sea is thought by some to be 

 contributing to a small but perceptible decline in 

 the northern fiir seal population (Gentry et al.^). 

 To manage both fishery and fiir seal resources 

 intelligently it is necessary to know how much a 

 northern fiir seal eats and to identify the factors 

 that affect its food intake. Our data show that 

 feeding rate of captive adult females is variable 

 and influenced by season of the year and body 

 mass of the individual. 



Methods 



Ten adult northern fur seals (two males and 

 eight females) were captured on St. Paul Island, 

 Pribilof Islands, Alaska, in mid-October 1977.^ The 

 ages of the females were estimated at 5+ yr, based 

 on the color of the vibrissae, which were complete- 

 ly white (Scheffer 1962). After a short observation 

 period all seals were shipped by air freight to 

 Mystic Marinelife Aquarium in Mystic, Conn. On 

 arrival, the females were tagged with monel metal 

 cattle ear tags^ identical to those used in the 

 National Marine Fisheries Service's Pribilof Fur 

 Seal Program. One tag was placed on each seal's 

 left foreflipper above the fur line. Numbers 

 assigned were XCuOl through XCu08. Once accli- 

 mated, all seals were kept together in a large 

 outdoor exhibit. Husbandry requirements, includ- 

 ing feeding rate, were studied for the next 2 yr. 

 This report deals only with the females. 



Feeding rate was recorded daily for 356 days of 

 1978 (5 January through 27 December). Data are 

 summarized in Table 1. The year was divided 

 arbitrarily into three periods, each starting the 

 day after the animals were weighed. Weights were 

 taken 4 January (Period 1 = 5 January through 

 7 March), 7 March (Period 2 = 8 March through 

 25 September), and 25 September (Period 3 = 



'Contribution No. 16, Sea Research Foundation, Inc. 



^Gentry, R. L., J. H. Johnson, and J. Holt. 1977. Behavior 

 and biology, Pribilof Islands. In Marine Mammals Division, 

 Fur seal investigations, 1976, p. 26-39. Northwest Fish. Cent. 

 Processed Rep. 



^Permit No. 178, applied for under the Fur Seal Act of 1966 

 and issued 2 May 1977 by the National Marine Fisheries 

 Service. 



"NASCO, 901 Janesville Avenue, Fort Atkinson, WI 53538. 

 Reference to trade names does not imply endorsement by the 

 National Marine Fisheries Service, NOAA. 



182 



FISHERY BULLETIN: VOL. 79, NO. 1, 1981. 



