12 UNIVERSITY OF WISCONSIN STUDIES 



noted by him were not observed by the writer during the 

 summer of 1920: Acipenser rubicundus, AmUoplites rupestris, 

 Apomotis cyanellus, Hadropterus guentheri, Hybopsis storerianus, 

 Lota maculosa, Moxostoma aureolum, Notropis blennius, Notropis 

 rubifrons, Notropis whipplei. The following thirteen species 

 not recorded by Wagner were taken by the writer: Aphredo- 

 derus say anus, Ameiurus melas, Ameiurus natalis, Ameiurus 

 nebulosus, Carpoides carpio, Carpoides thompsoni, Eupomotis 

 gibbosus, Morone interrupta, Moxostoma breviceps, Notropis 

 jejunus, Notropis atkerinoides, Notropis heterodon, Pomoxis 

 annularis. A complete list of all the species examined is given 

 under the section on food (pp. 29-39). 



Marked changes have evidently occurred in the fish fauna 

 of the lake since Wagner (1908) made his observations in 1903 

 and 1904. The lamprey eel is no longer common probably 

 because its usual host, the spoonbill, has decreased in numbers. 

 Wagner says (p. 27), "the spoonbill is one of the most abundant 

 forms in Lake Pepin throughout the summer." In 1920 this 

 species was rather uncommon. Again Wagner says that the 

 rock sturgeon is "not uncommon," and that the hackleback is 

 rare. In 1920 (Table II) the hackleback was abundant and the 

 rock sturgeon (not seen by the writer) very rare. Wagner took 

 no bullheads, except the tadpole cat. Three species were com- 

 mon in 1920. The buffalo (Ictiobus cyprinella) was "very 

 abundant," and is now rather uncommon. It has been replaced 

 by the carp, which in 1920 led all other species in commercial 

 value. Wagner found the skipjack "very common" and in 1920 

 it was quite rare. He found the rock bass very common and the 

 young were "extraordinarily numerous alongshore." In 1920 no 

 rock bass were caught, although special efforts were made. The 

 local fisherman all agreed that it was an exceedingly rare fish. 

 The perch was rare in 1904 and in 1920 was rather common. 

 Small largemouth black bass are no longer so abundant along- 

 shore as to be a "nuisance in fishing with a minnow seine." 



The spoonbill, rock sturgeon, and buffalo have evidently 

 been more or less "fished out" during the past fifteen years and 

 the last has been replaced by the carp, which has similar habits. 

 Wagner probably took no bullheads because he did not fish 

 with trot-lines. The writer sees no apparent reason for the 

 marked decrease of the skipjack and rock bass. 





