Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Percidae
(Perches) > Etheostomatinae
Etymology: Etheostoma: Greek, etheo = to strain + Greek, stoma = mouth; Rafinesque said "various mouths", but Jordan and Evermann suggest the name might have been intended as "Heterostoma (Ref. 45335); nigrum: nigrum meaning black (Ref. 10294).
Environment / Climate / Range
Freshwater; benthopelagic; pH range: 7.0 - ? ; dH range: ? - 15. Temperate; 4°C - 18°C (Ref. 2059), preferred ?; 59°N - 32°N
North America: St. Lawrence-Great Lakes, Hudson Bay, and Mississippi River basins from Hudson Bay to southern Mississippi in the USA, and from Quebec in Canada and from Virginia in the USA to Saskatchewan in Canada and Colorado in the USA; and on Atlantic and Gulf Slope drainages in the USA.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 7.2 cm TL male/unsexed; (Ref. 5723); common length : 3.9 cm TL male/unsexed; (Ref. 12193); max. reported age: 4 years (Ref. 12193)
Occur in sandy and muddy, sometimes rocky, pools of headwaters, creeks, and small to medium rivers; and in sandy shores of lakes (Ref. 5723, 10294); also found in streams (Ref. 10294). Adults feed on midge larvae, mayfly nymphs, caddis larvae, and microcrustaceans; young on entomostracans and tiny midge larvae (Ref. 10294). Eggs are found clustered on underside of stone and guarded by males (Ref. 7043).
Eggs are found clustered on underside of stone (Ref. 7043). Males guard the eggs (Ref. 7043).
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. 109396)
CITES (Ref. 94142)
Threat to humans
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic Level (Ref. 69278
): 3.2 ±0.40 se; Based on food items.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.95; tmax=4; Fec=47-691).
Prior r = 0.25, 2 SD range = 0.05 - 1.32, log(r) = -1.39, SD log(r) = 0.84, Based on: 1 K, 1 tmax, 9 Fec records
Vulnerability (Ref. 59153
): Low vulnerability (14 of 100) .