about 65 percent of the south shore. Over 74 percent 

 of the total catch by the Kaho were chubs (Leucich- 

 thys spp.) followed by American smelt (Osmervs 

 mordax), 10 percent; suckers (Catostomus spp.), 

 6.5 percent; and lake trout (Salveliniisnamaycush), 

 3 percent. Commercially significant catches, 250 

 pounds per one-half hour, of chubs were taken on 

 every cruise and these fish, even if used mainly for 

 animal food products, could apparently support a 

 limited trawl fishery. Smelt, suckers, and common 

 whiteflsh (Coregonus chipeaformis) were caught 

 occasionally in commercially significant quantities 

 and could greatly supplement production efforts. 

 Most lake trout were caught in specific geographic 

 areas and appeared to be segregated by size in 

 specific depth zones. Abundant concentrations of 

 small trout could easily be avoided after being lo- 

 cated by fishing certain depths. With proper care, 

 most trout were returned to the water alive. The 

 alewife (Alosa pseudoharengus) , which is now the 

 basis of a growing trawl fishery in Lake Michigan, 

 and lake herring (Leucichthys artedt) were not 

 taken in significant amounts during the study. 



295. Published in 1968. 



296. Fishery publication index, 1955-64 — 

 Publications of the Fish and Wildlife Service 

 by series, authors, and subjects. Anonymous. 

 May 1969, 240 pp. 



(No abstract.) 



297. Bottom trawl explorations in Green Bay 

 of Lake Michigan, 1963-65. By Norman J. 

 Reigle, Jr. March 1969, 14 pp., 3 figs., 6 tables, 

 2 app. tables. 



ABSTRACT 



A bottom trawling survey was made during 11 

 cruises operating for 36 days over the 3-year study 

 period. Explorations were made at all possible 

 fishing depths and during 8 months. The 179 ex- 

 ploratory drags made during this study represent 

 the first attempts by the Bureau of Commercial 

 Fisheries to determine if bottom trawling in Green 

 Bay is commercially feasible. 



The overall catch rate was at a level that would 

 be commercially feasible for a trawl fishery based 

 primarily on alewife (Alosa pseudoharengus) and 

 smelt (Osmerus mordax) and supplemented by 

 catches of suckers (Catostomus catostomus and C. 

 commersoni), carp (Cyprinus carpio), and yellow 

 perch (Perca flavescens) . Game fish were taken 

 infrequently in the trawl, and trawling would not 

 jeopardize sport fishing in Green Bay. 



298-300. Published in 1968. 



301. Bottom trawl explorations in Southern 

 Lake Michigan, 1962-65. By Norman J. 



Reigle, Jr. February 1969, 35 pp., 6 figs., 13 

 tables, 11 app. tables. 



ABSTRACT 



For 4 years the Bureau of Commercial Fisheries 

 Exploratory Fishing and Gear Research Base at 

 Ann Arbor, Mich., surveyed the abundance, seasonal 

 availability, and depth distribution of various fish 

 stocks. 



The alewife (Alosa pseudoharengus) and chubs 

 (Leucichthys spp.) were taken readily with the 

 bottom trawl. Alewives composed 51.4 percent and 

 chubs 44.0 percent of the trawl catch. Two other 

 commercial species, yellow perch (Perca flavescens) 

 and smelt (Osmerus mordax), were taken occasion- 

 ally in commercial amounts. 



The alewife stocks have increased tremendously 

 in recent years. The poundage of alewives in the 

 trawl catch increased each year from 17 percent 

 in 1962 to 74 percent in 1965. Alewives exhibited 

 pronounced seasonal movements and generally were 

 available to bottom trawls only at specific depths. 

 The trawls caught alewives at depths of less than 

 5 fathoms to over 50 fathoms. Alewives appeared 

 to be distributed universally in the study area during 

 most of the year but were found only in some sections 

 in winter. Alewves were more diflncult to catch 

 between July and the end of December than during 

 January through June. 



Chubs were abundant all year throughout south- 

 ern Lake Michigan. Chubs were caught over a wide 

 depth range throughout the year, although bottom 

 trawling indicated some horizontal dispersal shore- 

 ward in summer and back to deeper water in fall. 



302. Synopsis of the biological data on the Pa- 

 cific Mackerel, Scomber japonicus Houttuyn 

 (Northeast Pacific) . By David Kramer. Feb- 

 ruary 1969, 18 pp., 9 figs., 4 tables. 

 ABSTRACT 

 This synopsis attempts to bring together all 

 knowledge extant on the identity (nomenclature, 

 taxonomy, morphology), distribution, bionomics, life 

 history, population, fishery, and protection and man- 

 agement of the Pacific mackerel. 



303-308. Published in 1968. 



309. Progress report of the Bureau of Com- 

 mercial Fisheries Radiobiological Laboratory, 

 Beaufort, N.C., Fiscal Year 1968. By T. R. 

 Rice. April 1969, 59 pp., 32 figs., 12 tables. 

 ABSTRACT 

 Research activities included studies in estuarine 

 ecology, biogeochemistry, pollution, and radiation 

 effects. 



