1943 
300. 
301. 
Interior—-Duplicating Section, Washington, D. C. 01662 
that the seale in Pacific waters sre becoming unhealthily overpopulated is 
warranted. The fobben Island population, on the other hand, shows a simple 
sigmoid curve, indicating an increasingly lower ratio between the natural in- 
crement and the mortality rate (annual harvest plue "unexplained disapp 
ances"). As no biological reproductive failure on the part of the Robben Is- 
land animals nor any apparent increase in their mortality rate can be demon- 
strated, the author suggeste the failure of the Robben Island herd to increase 
proportionately to the other Pacific (i.e. Pribilof) seals must be caused by 
overcrowding on a emall island where no more room is left for increase. He 
notes with alarms the proposed increase in the Robben Island kill. From the 
available statistice he shows that an anmial harvest of 10,000 seale could ex- 
tirpate the herd in four years, and an anmial kill of 3,000 might postpone the 
end for about 10 yeare. However, an annual kill of 2,500 should maintain the 
present population indefinitely. 
ere a Tashiyuki. Lecture on Marine Fur Production (Suisan Mohi Sougyo Ni Teuite), 
x 6", 35 pp, unbound pamphlet, publ by Shinyo Chosa Kokyukai (Assoc for Credit 
Investigation), Tokyo, 1943. 
A popular account of the fur seal business for lay consumption. 
Miyagi, Yutaro. The Islands in the Northeast Pacific: Part II, Sea Mammals and the 
Fur Seal Exploitation, Jour Fieh Soc Jap (722), pp 110-114, Jan 1943; (724), pp 67= 
74, Mar 1943; (725). pp 62-67, Apr 1943. 
A general review of the subject, based on past literature entirely. 
the End 
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