448 



BULLETIN OF THE BUREAU OF FISHERIES 



GEOGRAPHICAL DISTRIBUTION 



The records on the occurrence of Jciyi in Lake Ontario are given in Table 54 

 and are shown platted on the lake chart in Figure 7. For the most part they are 

 derived from the use of the special 2% and 2% inch nets. It appears that Jciyi was 

 taken out of every port from which the nets were set, and as the ports are distributed 

 along the shore line of the lake it may be concluded safely that Jciyi occurs through- 

 out the waters of the lake where suitable conditions obtain. 



BATHYMETRIC DISTRIBUTION 



The chief data on the depth distribution of the kiyi are derived from the use 

 of the 23^2 and 2% inch nets, which were set under my direction during the summers 

 of 1921 and 1923. A few specimens have been seen, also, that were taken accidentally 

 in the nets of larger mesh. All nets were set between the depths of 20 and 75 fathoms 

 and in every locality took specimens of the species. No effort was made to determine 

 the limits of the range of the species, so that for the present it can be stated only that 

 individuals of the species range during the year between 20 and 75 fathoms. 



RELATIVE ABUNDANCE 



The experimental nets did not take Jciyi abundantly at any time, but it is interest- 

 ing to record the relative abundance of this and the other species taken with it. On 

 July 19, 1921, 6^ miles N. by W. Y 2 W. of Wilson, N. Y., in 65 fathoms (record 

 12), 75 percent of the catch was of Jciyi. On June 25, 1921, 5 miles north, in 50 fathoms 

 (record 10), Jciyi comprised 40 per cent of the fish taken; on July 4, 1921, 7 miles 

 off Braddock Point Light, in 65 fathoms (record 8), the percentage was about one- 

 third, and on July 12, 1921, 8^ miles NNW. of Sodus Point, N. Y, in 60 fathoms 

 (record 7), about one-fourth. But few Jciyi were taken in other lifts made 20 miles 

 S. by W. of Presque Isle Light, Ontario, on June 10, 1921, in 40 to 50 fathoms (record 

 2); on June 29, 1921, 13 miles E. Yi S. of Bronte, Ontario, in 40 to 50 fathoms (record 

 1); on June 23, 1921, 3 miles north of Wilson, N. Y., in 30 fathoms (record 9), on 

 July 16, 1921, 5 miles north, in 50 fathoms (record 11), and on July 21, 1921, 2 miles 

 north, in 20 fathoms (record 13); on August 30, 1923, 14 miles west of Sandy Pond, 

 N. Y., in 60 fathoms (record 3) ; and on September 4, 1923, 8^ miles W. by N. Y 2 N. 

 of Oswego, N. Y., in 70 to 75 fathoms (record 6). The specimens taken in the 3-inch 

 nets off Selkirk and Oswego, N. Y. (records 4 and 5), were accidental captures. 



It must be borne in mind that, unlike Lakes Michigan and Huron, in which 

 grounds suitable for deep-water Leucichthys or chubs have been located through 

 seasons of experience, most of Lake Ontario never has been exploited for these species, 

 and the areas where they occur most abundantly are as yet unknown. For this 

 reason the experimental nets, from the use of which these data on relative abundance 

 are derived, were of necessity set at random in the lake, with depth alone as the 

 directing factor, and therefore it can not be expected that the nets will yield conclusive 

 data on absolute abundance or even on relative abundance. In the case of the kiyi, 

 from our knowledge of the habits of the species in other lakes such observations 

 as have been recorded may be taken to indicate that the center of abundance of 

 kiyi is attained in depths of 60 fathoms or more. 



