Oneida Lake I'isUcs 



IWIN*-. THE F(M)I> OF THE LaRGE COMMMN Sl'NFIsH FROM IINEIDA I.AKE AS 



Revealed hy Stomach Examinations 



.^cvfii wiTi- a<liilt> iK-arJy >ix iiu-lics limj;. fnun difj) water ( 12-K1 It. ( near 

 Constaiitia. 'I"ht>f hail Ik-cii eating snails almost ciitiri-ly. .\ cousitjeralilc niiuuiiit 

 of criistacfai) material was found in one stomach, .^cvcn s|)ocimi'ns t-xamiiictl 

 wiTf catifs'ht in the shallow water of i-owcr ."^oiith Hay. These were nietlitun size<l 

 C3-5''J inches I an<l ha<l U-en feeding ihmmi snails aii<l Crustacea, the latter of 

 these forminj; a iiru|M(rtionately greater part of the f«MHl than in the adtilts from 

 <lef|) water. iLiker (I.e.. |>p. 1S4. iSS) sumniari/e<l the resnits of Forlics" ('So. p. 

 54 t studies of the fo«><| of this s|iecies, those of llankinson ( "oS. p. J13. J45) at 

 Walnut I-ike aiul of Reichard ("15. p. j^.^ ( at !)«uii;las I-nke. Michigan, and those 

 of Marshall and CiillK-ri (05, |>. 5n>) at i-ike Mendota. Wisconsin. He con- 

 clndis that the I'linipkiiiseed "of Illinois waters. DKii^las l.;ike. Michij;aii. Mendola 

 I.ake. \\ isconsin. ami < Ineida I-nke, New York, are larcfly mollusk eaters. Those 

 of Walnut I.;ike, Michigan, are insect eaters, ihere may lie sonte, as yet unkiuiwn, 

 factors which cau^e this variation in the fiHMl of a typical mollusk-ratin^ fish. 

 It cannot he lack of mollusks in this lake. Itecause ei^ht or more availaMc >j)ccies 

 are known lo live in the lake ( Ilnnkinsoii. '(iS. p. ji,i,\. \s Ixittom inhahiting 

 insect larvae are present an<l eaten there nnist l>e some selection l>y the M\" 



