450 Roosevelt Wild Life Annals 



ACAXTHOCEPHALA 



Neoechiiiorliyiu lilts sp. Pratt, '23, p. 67. 



Neoechiiiorliyinliiis cylinilratiis ( N'anCleave). Pearse, 24, p. 80. 



Nematolm:s 

 DacuitJioidcs cotyloplwra Ward and Alagath. York and Mapleton, "26, p. 384. 



COPI^PODS 



Eri/asiliis cciitrarcliidaniui. Evermann and Clark. '20. p. 299. 

 Ar<jidns sp. Wilson. '04. p. 119. 



MOLLUSKS 



Laiiipsiliis (jliiteola, Coker, '21. p. 162; glochidia. 



In the literature on Pike Perch are notes on parasites not specifically deter- 

 mined, at least the species names are not recorded. Evermann and Clark ("20, 

 p. 423) foinid trematodes abundant in the stomachs of Pike Perch from Lake 

 Maxinkuckee examined by them. Ward ('11, p. Jjy ) notes 478 parasitic worms 

 in iS of these fish; others were not examined. He found 139 cestodes and ^t,^ 

 acanthocephalans. Bean ('07, p. 216) found an eye disease affecting young Wall- 

 eyed Pike in Scriba Creek, a tributary of Oneida Lake, at Constantia, X. Y. The 

 disease also attacked other small fishes, like Trout Perch. Evermann and Clark 

 (20, p. 299) tell of the abundance of leeches on Wall-eyed Pike at Swanton, \'er- 

 mont. Here nearly every one of two hundred specimens examined had at least 

 a few leeclu-- Minuwhere on its l)o<ly. Fn m the roof of the mouth of a four pound 

 female, forty leeches were taken. 



Little concerning the ])redatory enemies of this species could l)e found in 

 literattu'e. Cheney ('97. p. 205) says: ".Xt spawning time, the only fish they seem 

 to fear is the real ])ike, Liiriiis hiciiis. . . . lor this fish will drive them from 

 their lied wIkii the Mack bass will not." l!e,-in ('ij. p. 201) tells of a spawning 

 stream at Constantia being filleil with sni.ilj I'erch ;ui(l minnows which fed on the 

 eggs and fry of Pike Perch, and he belie\es that the percentage that escaped these 

 depredations was very small. Cole ( '115. p. 51)5 ) notes the Carp as a ])ossil)Ic enemy 

 of Pike Pen-h. by interfering with its eggs attached to water plants. P>ean ('13, 

 p. 274), in writing of the destructiveness of the Lake Lamprey in Oneida Lake, 

 lists the \\',il] I'xed I'ike as a fish attacked b>- this parasite and ("10, p. 255) men- 

 tions that b'oreman Scriba. of ( nuslantia I l:itcliery. in julv and August fomid 

 the lake literally covered with dead fish, most of which wvvv I'ike I'erch and Cis- 

 coes (Tullibees), and practicallv all of them bore Lamprey marks. 



Eeonoinic Importance. A fish of large size with pi.scivorous habits, when 

 abundant, is likely to afTect the other animal life of the body of water in which 

 it dwells in an important way. lMirtnnatel\ . however, the Pike Perch does not 

 feed extensively, in large natm-;il bodies of water, upon lish directly useful to m;m. 

 Minnow^s and other soft-rayed fishes, which are mostly of the "rough" class of fish, 

 appear to be its usual food (bdrbcs, 'S(], p. 35; Leach, '27, p. 4). Forbes (l.c) 

 shows the inii)ortance to man of ilir I'ike I'erch feeding upon Gizzard Shad. He 



