1954. Fisheries knowledge increased 1955. 



through research vessel. The 

 Fisherman, Vol. 22, No. 3, pp.7 

 and 13-14. 

 Description of the vessel Cisco , with 

 photograph, deck plans, and sectional 

 sketch; listing of equipment and gear 

 for navigation and for fishery, limno- 

 logical, and hydrographic research; 

 discussion of types of research made 

 possible by the vessel and of practical 

 contributions to fishery knowledge and 

 management. 1956. 



1954. Killers of the Great Lakes . The 



Book of Knowledge Annual, 1954, 



pp. 125-127. 

 Popular, illustrated story of the sea 

 lamprey, its damage to the fishery, 

 and research aimed at the development 

 of effective control . 



1954. A research program for Lake Erie. 



The Fisherman, Vol. 22, No. 1, 



pp. 7, 11-12, and 14. 

 Detailed suggestions are offered for 

 research along four major lines: 

 identities, distribution, and move- 1957 



ments of stocks; fluctuations of catch 

 and availability in relation to year- 

 class strength, size at capture, and 

 rate of exploitation; factors of abun- 

 dance; experimental management. 



1956. Status of sea lamprey control. 



Wis. Cons. Bull., Vol. 21, No. 4, 

 pp. 14-17. 

 Up-to-date statement of progress, ex- 

 tent, and methods of current control 

 program; plans for expansion are out- 

 lined and possible alternative use of 

 chemicals is discussed. 



1956. The lake trout endangered in the 



Great Lakes. In: Our Endangered 

 Wildlife, Nat. Wildlife Fed., pp. 

 23-24. 

 Review of effects of sea lamprey pre- 

 dation which has brought the lake trout 

 to near extinction in Lakes Huron and 

 Michigan and warning of impending 

 collapse in Lake Superior if lamprey 

 control is not achieved soon. 



Fisheries of the Great Lakes. 



In: The Great Lakes and Michigan. 



Great Lakes Res. Inst., Univ. Mich., 



pp. 36-37. 

 Includes brief comments on: the limits 

 of research of earlier years; expansion 

 of studies in the face of the sea lamprey 

 crisis; present research program on 

 the lamprey, and on limnology and 

 fisheries; the outlook for future re- 

 search. 



Great Lakes Fishery Commission: 

 role of the Commission in the solu- 

 tion of fishery problems, hv. Great 

 Lakes- -Programs and Problems, 

 Great Lakes Comm., pp. 14-16. 

 Describes the origin and organization 

 of the Commission; lists its principal 

 duties as (1) the development and im- 

 plementation of programs for research 

 on and control of the sea lamprey and 

 (2) coordination of fishery research on 

 the Great Lakes; reviews early activ- 

 ities of the Commission and its Scientific 

 Advisory Committee. 



Recent changes in the deep-water 



fish populations of Lake Michigan. 



Trans. Am. Fish. Soc, Vol. 86 



(1956), pp. 393-408. 

 The invasion of the sea lamprey pre- 

 cipitated a series of sweeping changes 

 that are still in progress. First came 

 the destruction of stocks of lake trout 

 and burbot, and with it an end of pre- 

 dation by these fish on smaller species, 

 principally the bloater (a chub) and 

 cottids. At the same time lampreys 

 were forced to turn to the larger species 

 and individuals of ciscoes or chubs as 

 food. As a result, bloaters (and pre- 

 sumably cottids also) increased in 

 abundance and larger chubs grew scarce . 

 By 1954-55 the abundance of bloaters 

 was 347 percent but that of large chubs 

 (10 inches or longer) only 37 percent 

 of that in 1930-32 when an earlier survey 

 was made. 



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