436 



BULLETIN OF THE BUREAU OP FISHERIES 



VARIATIONS 



There are not enough specimens in my collection for a study of local variation, 

 and the examples in the collection are too nearly uniform in size to yield data on 

 changes with growth. 



COMPARISONS 97 



Kiyi resembles nigripinnis and hoyi more closely than any other Leucichthys 

 of the lake. It is contrasted with the former on page 419. It differs from hoyi in body 

 shape (which is rather ovate in side view in Tciyi and elliptical in hoyi), in the fewer 

 gill rakers on the first branchial arch, more lateral-line scales, and longer paired fins. 

 The last-mentioned characters are compared below: 



Gill rakers on the first branchial arch: 



kiyi, (34) 36-41 (45), with 14 per cent more than 40. 



hoyi, (37) 41-44 (48), with 86 per cent more than 40. 

 Lafteral-line scales: 



kiyi, (71) 77-87 (91), with 88 per cent more than 77. 



hoyi, (60) 67-77 (84) with 7 per cent more than 77. 

 Pv/P: 



kiyi, (1.1) 1.4-1.7 (2.1), with 13 per cent more than 1.7. 

 hoyi, (1.3) 1.7-2 (2.5), with 74 per cent more than 1.7. 

 Av/V: 



kiyi, (0.9) 1-1.3 (1.4), with 1 per cent more than 1.3. 

 hoyi, (1) 1.2-1.4 (1.7), with 33 per cent more than 1.3. 



In addition, Tciyi has a relatively longer head, a narrower body, and, on the aver- 

 age, more pigmentation. The state of development of the sex organs, especially in 

 females, may also be of aid in separating the two forms, as Tciyi probably spawns in 

 October and hoyi in March. 



Only the smaller specimens of artedi can be confused with Tciyi, as the latter has 

 not been seen to attain a length of more than 245 millimeters. Kiyi has fewer gill 

 rakers on the first branchial arch and longer .paired fins. These characters are com- 

 pared below: 



Gill rakers on the first branchial arch: 



kiyi, (34) 36-41 (45), with 14 per cent more than 40. 



artedi, (41) 46-50 (55). 

 Pv/P: 



kiyi, (1.1) 1.4-1.7 (2.1), with 7 per cent more than 1.8. 

 artedi, (1.6) 1.8-2.1 (2.5), with 80 per cent more than 1.8. 

 Av/V: 



kiyi, (0.9) 1-1.3 (1.4). 



artedi, (1.3) 1.5-1.7 (2), with 93 per cent more than 1.4. 



The body shape of Tciyi, as seen from the side, is more or less ovate, as contrasted 

 with the elliptical form of artedi; the body is narrower and less pigmented; the head 

 and maxillary are relatively longer; the lower jaw is usually longer than the upper 

 and the mandible is usually hooked, while in artedi it is usually shorter than the upper. 

 Kiyi probably spawns about a month earlier than artedi (in October), and the state 



" All figures given under this section are based on an examination of all collected specimens, except proportions for artedi, which 

 are given for specimens less than 225 millimeters in length. 



