54 Conservation Department 



in the majority of trout .streams of the region. The sucker is 

 the least abundant of the three. 



Little is known upon the subject of minnows and their relation 

 to trout. It is known, however, that trout eat some minnow^s and 

 other fishes. A 18-inch brown trout taken on Mill creek (near 

 Patchinsville, X. Y., Steuben county) July 26, 1926, had eaten a 

 young' sucker (Catostomus commersonnii) and a black-nosed dace 

 {Rhinichfhys atronasus). These made 40 per cent of the food of 

 this individual. A T-y^-mah brown trout taken on East Koy creek 

 August 29, 1926, had eaten a small minnow. A rainbow trout H 

 inches in length taken on the Genesee river at Belmont, N, Y., 

 on June 20, 1926, had likewise taken a small minnow. A 3V2-inch 

 brook trout from Browning Spring cove (Allegany county) had 

 a stone-roller minnow^ {Camposfoma anornahim) 1 inch long in 

 its mouth when it was captured. Two sticklebacks {Eucalia incov- 

 stans) made 92 per cent of the food of a 6-inch brook trout taken 

 from Seven Springs pond, near Batavia, N. Y., August 31, 1926. 

 Dr. Juday (1907) found suckers in Colorado specimens of brook 

 trout. Embody and Gordon (1924) found sculpins {Coitus) in 

 the stomachs of brook trout from streams of Tompkins county, 

 N. Y. 



The fish item of the brook trout is rather small, however, accord- 

 ing to Embody and Gordon (1924), who list fishes as 2.52 per cent 

 of the food. That minnows compete with trout for food is appar- 

 ent from the following data taken from specimens from Mill creek, 

 near Patchinsville, N. Y. (Steuben county), August 1, 1926: 



Black-nosed dace {Rhinichfhys atronasus), 3 specimens, 2i/4 to 

 2V2 inches long. Midge larvae and pupae {Chironomidae) , 98.4 

 per cent. One water mite {Hydracarina) , 1.6 per cent. 



Horned dace {t^emofiJtcs atromaculafus), 2 specimens, 2^4 to 

 2% inches long. Snails, 25 per cent ; land insects, 62.5 per cent ; 

 aquatic insects (nym])hs of Ephemerida), 2.5 i)er cent; grass 

 seeds, 10 per cent. A third specimen was nearly empty, having 

 eaten only a small mayfly n3'm])h {Ephemerida). 



Brook trout {SalvelinMS fonfinolis), 3, 4, 8 inches long. Snails, 

 8.3 per cent; land insects, 42.6 per cent; aquatic insects, 49 ])er 

 cent (midge larvae, 8 per cent). 



Brown trout {^alm<o fario), 2 specimens, 6^ {. and 7 inches. 

 Snails, 9 ])er cent; land insects, 30 per cent; aquatic insects, 59 

 ])er cent (midge larvae, 12.5 ])er cent) ; grass seeds, 2 per cent. 



Rainbow trout {Sdlmo irideiis), 4 inches long. Land insects, 

 66 i)er cent; water insects, 29 per cent (midge larvae, 3 per cent) ; 

 grass seeds, 5 per cent. 



Note that midge larvae {Chironomidue) were taken by blacU- 

 nosed dace and trout and that horned dace were feeding upon the 

 same type of surface food (insects) that trout were taking. The 

 grass seeds eaten by the fislies were ])robably mistaken for floating 

 insects. 



The German Carp. — The distribution of the Gei'man carp in 

 the Genesee region is i-atlier general, occurring in suitable parts 

 of the Genesee river from Wellsville to Lake Ontario. It is estab- 



