Iowa Fish Atlas

Native: Yes

State Rank: S5

ITIS Code: 163376          

National Rank:  N5

Global Rank: G5

Modeled By: Anna Loan-Wilsey

State Range:

The creek chub is the most widely distributed minnows in Iowa, occurring in every major watershed in the state.  However, its abundance varies greatly with location (Harlan et al. 1987).    It reaches its greatest abundance in small streams while at the same time is only occasional in the larger rivers.  The creek chub is rare and has a limited distribution in the Mississippi and Missouri Rivers.  Populations of creek chub are seldom found in lakes and reservoirs (Harlan et al. 1987).

Habitat Affinities:

Trautman (1981) states that the creek chub was found in all ponds, reservoirs, and lakes, but concurs with other researchers that the majority of creek chubs inhabit small, often intermittent, headwater creeks where few other fishes are present (Clay 1975; Cross and Collins 1995; Douglas 1974; Eddy and Underhill 1974; Etnier and Starnes 1993; Pflieger 1997; Phillips et al. 1982; Robison and Buchanan 1988). Its population may increase when human activity reduces the population of competing species (Robison and Buchanan 1988).  The creek chub frequents streams with alternate riffles and pools rather than continuous strong flow, occurring where there are sufficient holes, brush, roots, or other cover for retreat if threatened (Clay 1975; Etnier and Starnes 1993; Pflieger 1997; Trautman 1981).  It is most abundant in streams of high gradient with gravelly bottoms, requiring flow for spawning and gravel in which to build nests (Clay 1975; Douglas 1974; Pflieger 1997; Robison and Buchanan 1988; Trautman 1981).  It can tolerate turbidity if there is enough gradient to create gravelly areas, and scarcity of gravelly bottoms may limit the creek chub’s distribution (Pflieger 1997).   Overall, the creek chub is “a native species with the tenacity of a weed” (Becker 1983).

Predictive Model(s):

Statewide Model: by 8-digit HU [Decision Tree Analysis n=1883]

The distribution is based upon existing collection records.

(("LINKR" <= 1 AND ("GRADRCHR" > 1 AND "GRADRCHR" <=9) AND

"MAXELEVR" > 1) OR

("LINKR" <= 1 AND "GRADRCHR" >9) OR

("LINKR" > 1 AND "LINKR" <= 2) OR

(("LINKR" > 2 AND "LINKR" <= 3) AND "GRADSEGR" <= 1) OR

(("LINKR" > 2 AND "LINKR" <= 3) AND ("GRADSEGR" > 1 AND "GRADSEGR"

<= 4 ) AND "DLINKR" <= 7) OR

(("LINKR" > 2 AND "LINKR" <= 3) AND ("GRADSEGR" > 4 AND "GRADSEGR"

<= 7)) OR

("LINKR" > 3 AND "LINKR" <= 4) OR

(("LINKR" > 4 AND "LINKR" <= 5) AND "DSIZE_CODE" <= 3))

Mississippi River Model:

The distribution is based upon existing collection records and professional review.

 (("pool" >= 'S10' AND "pool" <= 'S13') OR "pool" = 'S17')

Missouri River Model

The distribution is based upon existing collection records and professional review.

("pool" = 'O17')

Overall Prediction:

("LINKR" <= 1 AND ("GRADRCHR" > 1 AND "GRADRCHR" <=9) AND "MAXELEVR" > 1) OR

( "LINKR" <= 1 AND "GRADRCHR" >9) OR

( "LINKR" > 1 AND "LINKR" <= 2) OR

(( "LINKR" > 2 AND "LINKR" <= 3) AND "GRADSEGR" <= 1) OR

(( "LINKR" > 2 AND "LINKR" <= 3) AND ("GRADSEGR" > 1 AND "GRADSEGR" <= 4 ) AND "DLINKR" <= 7) OR

(( "LINKR" > 2 AND "LINKR" <= 3) AND ("GRADSEGR" > 4 AND "GRADSEGR" <= 7)) OR

( "LINKR" > 3 AND "LINKR" <= 4) OR

(( "LINKR" > 4 AND "LINKR" <= 5) AND "DSIZE_CODE" <= 3) OR (("pool" >= 'S10' AND "pool" <= 'S13') OR "pool" = 'S17') OR ("pool" = 'O17')

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Additional References:

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Berkman, H.E.  1984.  Effects of sedimentation on stream fish communities in northeast Missouri.  Master’s thesis, University of Missouri, Columbia, Missouri.  116 pp.

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Cross, F.B.  1967.  Handbook of fishes of Kansas.  University of Kansas Museum of Natural History Miscellaneous Publication  No. 45, Lawrence, Kansas.  357 pp.

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Kelly, G., editor.  1986.  Animal habitat relations handbook.  Missouri Department of Conservation and U.S.D.A. Forest Service, Jefferson City, Missouri.  293 pp.

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Miller, R.J.  1967.  Nest building and breeding activities of some Oklahoma fishes. Southwestern Naturalist 12(4):463-468.

Moshenko, R.W.  1972.  Ecology of the northern creek chub, Semotilus atromaculatus atromaculatus (Mitchill), in the Mink River, Manitoba.  Master’s thesis. University of Manitoba, Winnipeg, Manitoba, Canada.  63 pp.

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Photo Credits:

Upper Left:       Photo courtesy of the Ohio Department of Natural Resources, http://www.ohiodnr.com/default.htm

Upper Right:     Photo courtesy of Konrad P. Schmidt, copyright Konrad P. Schmidt.