Search Field Guide
Advanced Search
Montana Animal Field Guide

Montana Field Guides

Bigmouth Buffalo - Ictiobus cyprinellus

Google for more images Google for web pages

Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
FWP Conservation Tier: 2


 

External Links





 
General Description
The Bigmouth Buffalo has a more terminal mouth, (that is, opening at the front of the head), which allows it to feed on plankton as well as bottom organisms and detritus. These barrel-shaped fish are rarely taken on hook and line. Bigmouth Buffalo can produce hundreds of thousands of eggs and live over 20 years. (FWP)

Diagnostic Characteristics
Usually dark colored (brownish or blackish), often with a coppery sheen; sometimes greenish or gray. Underside whitish or yellow; fins dark.

Species Range
Montana Range

Click the legend blocks above to view individual ranges.

Western Hemisphere Range

 


Summary of Observations Submitted for Montana
Number of Observations: 3211

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Records associated with a range of dates are excluded from time charts)



Migration
Make long spawning movements from lower Missouri River to upstream areas. Dispersal downstream follows.

Habitat
Large rivers and reservoirs. Spawn in larger streams with backwater areas.

Food Habits
Plankton, crustaceans, and diptera larvae are the major food items.

Ecology
Downstream portions of Yellowstone River important as rearing areas. Adults school.

Reproductive Characteristics
Spawns May - July at 60 degrees F. in shallow water. Sexual mature at 3 yrs. Spawns over bottom or on vegetation. Incubation: 8 - 14 days. Spawn peaks early to mid June on middle Missouri River.

References
Login Logout
Citation for data on this website:
Bigmouth Buffalo — Ictiobus cyprinellus.  Montana Field Guide.  Montana Natural Heritage Program and Montana Fish, Wildlife and Parks.  Retrieved on October 25, 2014, from http://FieldGuide.mt.gov/speciesDetail.aspx?elcode=AFCJC07020
 
There are currently 27 active users in the Montana Field Guide.