plentiful at ZO-60 fathoms. Abundance 

 on east shore of lower half of Lake was 

 seven tinnes that on west shore and three 

 tinnes that in northern part of Lake. 

 Age-group IV {average length 10.9 

 inches; average weight 6.1 ounces) 

 dominated samples. Females outnum- 

 bered males and survived to greater 

 age. 



JOBES, FRANK W. 



1949a, The age, growth, and bathymetric 

 distribution of the bloater, Leucichthys 

 hoyi (Gill), in Lake Michigan. Pap. 

 Mich, Acad. Sci. Arts Lett. 33:135-172. 



Study of distribution from 1930-32 

 collections fronn experimental gill nets 

 and of growth from earlier (1919 and 

 1928) collections from Grand Haven, 

 Mich. Bloaters were nnost plentiful at 

 20-59 fathoms (the larger fish were in 

 the deeper water in some months); 

 abundance on the east shore of lower 

 part of Lake was 1-1/2 times that on the 

 west shore and 2-1/3 times that in the 

 northern part of the Lake. Samples were 

 dominated by age-group IV in 1919 and 

 (weakly) by age-group II in 1928. Growth 

 was slightly more rapid in females than 

 in males but was slow in both sexes 

 (barely 8 inches in 5 years). Females 

 outnunnbered males. 



JOBES, FRANK W. 



1949b. The age, growth, and distribution of 

 the longjaw cisco, Leucichthys alpenae 

 Koelz, in Lake Michigan. Trans. Amer. 

 Fish. Soc. 76:215-247. 



Study of the distribution from 

 1930-32 collections from experimental 

 gill nets and of growth from earlier 

 (1923 and 1928) collections. Longjaw 

 was most plentiful at less than 70 

 fathoms and more than four times as 

 abundant in the northern part of Lake 

 and along the east shore as on the west 

 shore of the lower Lake, Samples were 

 dominated by age-groups III or IV. 

 Growth was similar off Grand Haven, 

 Mich., and in northeastern Lake 

 Michigan (average length about 1 1 inches 

 and average weight about 6- 1/4 ounces 

 at end of 4 years). Sex ratio was var- 

 iable, but females generally outnum- 

 bered males and reached higher ages. 



JOBES, FRANK W. 



1952, Age, growth, and production of yellow 

 perch in Lake Erie, Fish Wildl. Serv,, 

 Fish. Bull. 52:205-266. 



Review of production statistics, 1885- 

 1947, and detailed life-history study. 

 Includes materials on validity of scale 



readings, body-scale relation, size and 

 age distribution, growth (including an- 

 nual fluctuations, length of growing 

 season, and growth compensation), 

 length-weight relation and condition (in- 

 cluding fluctuations by month and year 

 and according to age and sexual state), 

 maturity, and sex ratio. 



JOBES, FRANK W., vide: RALPH HILE; JOHN 

 VAN OOSTEN. 



JOERIS, LEONARD S, 



1953, Technique for the application of a 

 streamer-type fish tag. Trans. Amer. 

 Fish. Soc. 82:42-47. 



Principal features of the technique 

 are: attachment of tag by a nylon- 

 thread loop prepared in advance of field 

 work; application of tag by means of a 

 curved surgical needle with a cutting 

 edge and a split eye. Preparation of 

 needle and tagging procedure are de- 

 scribed. 



JOERIS, LEONARD S. 



1957. Structure and growth of scales of 

 yellow perch of Green Bay. Trans. 

 Amer. Fish. Soc. 86:169-194. 



Establishes the validity of theannulus 

 as a year-mark in Green Bay yellow 

 perch. Variations in tinne of annulus 

 formation by calendar year, locality, 

 and age are described in relation to the 

 problenn of age determination for fish 

 caught early in the growing season. 

 Body-scale regressions are given and 

 compared for "key scales" from two 

 positions on the fish. 



JOERIS, LEONARD S. 



1959. Rapid measurement of fish. Progr. 

 Fish-Cult. 21(4):190-191. 



Lengths of fish are recorded rapidly 

 by punching holes with a needle (usually 

 soldered to a thimble) on strips of used 

 X-ray film from which the emulsion has 

 been washed. In the laboratory, the 

 strips are placed on a transparent ruler 

 on a surface illuminated from below and 

 points between graduations are counted. 

 Advantages of the method are listed and 

 procedures aboard vessels described. 



JOERIS, LEONARD S. 



1964, A horizontal sannpler for collection of 

 water samples near the bottom, Linnnol, 

 Oceanogr, 9(4):595-598. 



The new sampler pernnits more ef- 

 fective study of water characteristics 

 in a narrow stratum, particularly the 



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