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Ambloplites rupestris  (Rafinesque, 1817)

Rock bass
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Native range | All suitable habitat
This map was computer-generated and has not yet been reviewed.
Ambloplites rupestris   AquaMaps   Data sources: GBIF OBIS
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Image of Ambloplites rupestris (Rock bass)
Ambloplites rupestris
Male picture by N. Burkhead & R. Jenkins, courtesy of VDGIF

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Centrarchidae (Sunfishes)
Etymology: Ambloplites: Greek, ambloo = blunt + Greek, oplites = shield (Ref. 45335);  rupestris: Ambloplites=blunt armature; rupestris=living among the rocks (Ref. 79012).

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; demersal; pH range: ? - 7.0; dH range: 10 - ?.   Temperate; 10°C - 29°C (Ref. 12741); 54°N - 34°N

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

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. 5723). Introduced to Europe (Ref. 59043).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 43.0 cm TL male/unsexed; (Ref. 5723); common length : 15.4 cm TL male/unsexed; (Ref. 12193); max. published weight: 1.4 kg (Ref. 4699); max. reported age: 18 years (Ref. 72462)

Short description Morphology | Morphometrics

Dorsal spines (total): 10 - 13; Dorsal soft rays (total): 11-13; Anal spines: 5-7; Anal soft rays: 9 - 11; Vertebrae: 29 - 32

Biology     Glossary (e.g. epibenthic)

Adults inhabit vegetated and brushy stream margins and pools of creeks and small to medium rivers, and rocky and vegetated margins of lakes (Ref. 5723). Most commonly found in clear, silt-free rocky streams (Ref. 5723). They feed 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).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

The males care about the eggs for about 14 days (Ref. 93240) as well as the young (Ref. 2060). In Europe where it is introduced, males fan and defend the nests, which are shallow depressions in sand or gravel bottom along shallow shores. A male may spawn with several females in one nest and guard the nest until larvae leave the nest (Ref. 59043).

Main reference Upload your references | References | Coordinator | Collaborators

Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans


Human uses

Fisheries: minor commercial; gamefish: yes; aquarium: public aquariums
FAO(Publication : search) | FishSource |

More information

Larval dynamics
Aquaculture profile
Allele frequencies
Mass conversion
Stamps, Coins Misc.
Swim. type
Gill area


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Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5625   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01479 (0.01193 - 0.01834), b=3.10 (3.04 - 3.16), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
Trophic Level (Ref. 69278):  3.4   ±0.2 se; Based on diet studies.
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (tm=2-3; tmax=10; Fec=3,000-11,000).
Prior r = 0.41, 2 SD range = 0.18 - 0.93, log(r) = -0.89, SD log(r) = 0.41, Based on: 2 tgen, 1 tmax, 3 Fec records
Vulnerability (Ref. 59153):  Low to moderate vulnerability (33 of 100) .
Price category (Ref. 80766):   Unknown.