﻿REVIEW OF GENUS DOROSOMA — MILLER 395 



sylvania and rarely to Sandy Hook Bay, N. J. (Breder, 1933, pp. 23 

 and 28; Breder and Nigrelli, 1934, p. 194; Hubbs and Lagler, 1947, 

 p. 34; and Vladykov, 1945, pp. 35-37; 1947, p. 201). I recently 

 found a specimen of this species (U. S. N. M. No. 131346) collected 

 by S. E. Meek in the^/all of 1908^from Lake of the Woods, western 

 Ontario, Canada. This may represent an introduction, or perhaps a 

 misplaced specimen, for during the history of the extensive fisheries 

 on that lake no further specimens of gizzard shad have been collected 

 (Carlander, 1948). 



The presence of Dorosoma in the GreatLakes-St.LawrenceBasinmay 

 have resulted from its transfer from the Mississippi Basin during the 

 glacial or postglacial history of the region. Gerking (1945, p. 33) has 

 suggested that the gizzard shad may have entered the Glacial Great 

 Lakes during the Lake Maumee outlet stage. Vladykov (1945, p. 37) 

 firmly believed that the presence of D. cepedianum in the St. Lawrence 

 River resulted from its entrance by way of the Great Lakes rather 

 than by migration up the St. LawTence. The view that the gizzard 

 shad entered the Great Lakes via canal connections seems now to be 

 generally discounted, but I do not feel that tliis*possibility should be 

 eliminated entirely from consideration.^ Kirtland (1850, p. 2) definitely 

 stated, "It has become evident that the species has found its way into 

 the Lake [Erie] through either the Dayton and Maumee or the main 

 Ohio canals, probably thro' the former, and it is likely from its pro- 

 lificness that before many years it will become one of our most abun- 

 dant fishes." Kirtland was impressed with the fact that fishermen 

 had not recognized the gizzard shad in the vicinity of Cincinnati much 

 before 1840 and that they considered it to be an emigrant from the 

 south. Kirtland was perhaps overimpressed by the death of large 

 numbers of D. cepedianum during a hard freeze in the Dayton Canal, 

 for he cited this as supporting evidence for the supposition that the 

 species "was a native of a warmer climate." He was very sure, how- 

 ever, that the species did not occur in the Lake Erie Basin in 1840. 

 He wrote further, "In November 1848 four were taken near the mouth 

 of the Cuyahoga, and brought to me as a curiosity by one familiar 

 with the Lake fishes. In the course of the same month of the present 

 year [1850], some thirty or forty specimens were caught in this vicinity 

 by the same fisherman." 



DOROSOMA ANALE Mwk 



Dorosoma anale Meek, 1904, p. 93, fig. 26 (original description; type locality. 

 El Hule=Papaloapdn, Oaxaca, Mexico). 



This close relative of D. cepedianum replaces that species in southern 

 Veracruz, Mexico. To my knowledge it has been taken only in fresh 

 water. 



5 See also Radforth (1945, p. 58). 

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