Ambloplites rupestris (Rafinesque, 1817)
Rock bass
photo by N. Burkhead & R. Jenkins, courtesy of VDGIF

Family:  Centrarchidae (Sunfishes)
Max. size:  43 cm TL (male/unsexed); max.weight: 1,360.0 g; max. reported age: 18 years
Environment:  demersal; pH range: 7; dH range: 10; depth range - 21 m
Distribution:  North America: St. Lawrence River-Great Lakes, Hudson Bay (Red River), and Mississippi River basins from Quebec to Saskatchewan in Canada, and south to northern Georgia, northern Alabama and Missouri (native only to Meramec River) in the USA (Ref. 86798). Introduced to Europe (Ref. 59043).
Diagnosis:  Dorsal spines (total): 10-13; Dorsal soft rays (total): 11-13; Anal spines: 5-7; Anal soft rays: 9-11; Vertebrae: 29-32
Biology:  Occurs usually in rocky areas in shallow water of lakes, and the lower, warm reaches of streams (Ref. 1998). Inhabits vegetated and brushy stream margins, pools of creeks and small to medium rivers, and rocky and vegetated margins of lakes (Ref. 86798). Commonly found in clear, silt-free rocky streams (Ref. 86798). Feeds on small crustaceans, insects and fish (Ref. 30578). An introduced species in Europe which avoids swift waters and occurs in a wide variety of slow-flowing to stagnant waters such as large rivers, lakes, ponds, canals and backwaters (Ref. 59043).
IUCN Red List Status: Least Concern (LC); Date assessed: 14 October 2011 Ref. (120744)
Threat to humans:  harmless
Country info:   

Entered by: Froese, Rainer - 01.05.91
Modified by: Torres, Armi G. - 17.08.19
Checked by: Torres, Armi G. - 02.06.94

Source and more info: For personal, classroom, and other internal use only. Not for publication.

Page created by Jen, 05.08.02, php script by kbanasihan 06/09/2010 ,  last modified by sortiz, 10/02/17