collected in lower Cozy Lake. In the Shelikof 

 Strait systems they were collected in Big 

 River, in a tributary of Dakavak Lake, and in 

 outlet streams of lower Kaflia Bay and Devils 

 Cove Lakes. 



Slimy sculpin, Cottus cognatus Richardson,- - 

 Slimy sculpins were collected in the Naknek 

 and King Salmon systenns. In the Naknek sys- 

 tem, they were taken in Coville, Grosvenor, 

 Brooks, and Idavain Lakes; all basins of Nak- 

 nek Lake; Coville, Grosvenor, Brooks, Savo- 

 noski, and Ukak Rivers; and American, Mar- 

 got, Headwater, Hidden, One Shot, and West 

 Creeks. This sculpin also occurs in Ham- 

 mersly Lake. In the King Salnnon system, 

 slimy sculpins were collected in Takayoto 

 Creek, 



Both species of cottids in the nnonument 

 spawn in the spring, although their spawning 

 sites and behavior have not been observed. 

 Although the two species occur sympatrically 

 in streams and lakes of the Naknek system, 

 collections from Brooks Lake and its tribu- 

 taries suggest the coastrange sculpin is usu- 

 ally the donninant streann fornn and the slimy 

 sculpin is usually prevalent in lakes. Slinny 

 sculpin was the only cottid collected fronn 

 depths greater than 30 m. in any lake. 



EURYHALINE FORMS 



At least four marine fishes occur in fresh- 

 water portions of streams that lie within the 

 monurrient or flow from the monument. We 

 collected specinns of three of the species be- 

 tween 1962 and 1964, and Greenbank (see foot- 

 note 4) reported the fourth. These fishes were 

 collected upstream fronn the upper zones of 

 tidal influence, and although no corroborative 

 salinity data are available for any of the col- 

 lections, the species are all listed as euryha- 

 line forms by Gunter (1956), 



Osmeridae 



Arctic smelt, Osmerus dentex Steindach- 



ner .-- Arctic smelt nnove into Naknek River 

 from Bristol Bay in late winter and early 

 spring on their spawning migrations. They 

 were collected as far upstream as the Naknek 

 Rapids, a fast-water section of Naknek River 

 about midway between the outlet of Naknek 

 Lake and the town of King Salmon. Some of 

 these smelt may move into Naknek Lake near 

 the outlet of the river. 



Gadidae 



Pacific cod, Gadus macrocephalus Tile- 



si us . --Greenbank (see footnote 4) reported 

 that a Pacific cod was taken by an angler in 

 Naknek River just below the outlet of Naknek 

 Lake. He speculated that cod might occasionally 

 stray into the lake. According to Gunter (1956) 

 Greenbank's account was the first euryhaline 

 record of this species, 



Cottidae 



Pacific staghorn sculpin, Leptocottus arnna- 



tus Girard.--We collected 10 staghorn scul- 

 pins { 14-65 mm, total length) from Katmai 

 River 3.2 km. above the stream nnouth on 

 August 21. 1964. 



Pleuronectidae 



Starry flounder, Platichthys stellatus (Pal- 

 la^). --Several starry flounders have been 

 taken in Naknek River as far upstream as 

 Naknek Rapids, and C. J. DiCostanzo-"-^ re- 

 ported that he has observed this fish in Nak- 

 nek River at the outlet of Naknek Lake. We 

 collected eight small starry flounders (34- 

 44 mm. total length) from a shallow riffle 

 area of Katmai River about 3.2 km. above the 

 stream mouth on August 21, 1964. 



ZOOOEOGRAPHICAL IMPLICATIONS 



Additional collecting will undoubtedly reveal 

 new locality records, but sufficient data are 

 now available to define the basic distribution 

 of fish in the principal drainages of Katmai 

 National Monument. Striking differences occur 

 in these drainages, and the mountains of the 

 Aleutian Range (fig, 2) appear to have been an 

 effective barrier to the southward dispersal of 

 many fishes now in the Bristol Bay drainages. 



All fishes along the Shelikof Strait side of 

 the monument --salmon, char, sticklebacks, 

 and sculpins --are from groups known to have 

 high tolerance to salinity and to be capable 

 of marine dispersal. None of the principally 

 fresh-water fishes north of the Aleutian 

 Range--whitefishes, lake trout, grayling, 

 blackfish, pike, suckers, and burbot-.occur 

 in the Shelikof Strait drainages (table 2), 



The term "primary freshwater fishes" was 

 used by Miller (1958) for families that have 

 been restricted to fresh water throughout 

 their known history. His classification applied 

 to fishes in the monument would include only 

 blackfish, pike, and suckers, although Wal- 

 ters (1955, p, 334) reported that the longnose 

 sucker "readily enters coastal waters" in the 

 Arctic, Other cold-water fishes suchas white- 

 fishes, lake trout, grayling, and burbot that 

 are normally confined to fresh-water streams 

 and lakes in the southern parts of their ranges 

 do invade coastal waters in the Arctic (Wal- 

 ters, 1955), We have no evidence that any of 



■"■'chief, Salmon Investigations, Bureau of Commercial 

 Fisheries Biological Laboratory, Box 155, Auke Bay, 

 Alaska 99821. Personal communication, 1964. 



14 



