PRODUCTION OF THE CRAYFISH CAMBARUS-BARTONII (FABRICIUS, 1798) (DECAPODA, CAMBARIDAE) IN AN ACIDIC APPALACHIAN STREAM (USA)

The growth rate and annual production of the crayfish Cambarus bartoni i were estimated in Crouch Run, a 3rd-order stream that drains a high- elevation catchment in West Virginia and which has been acidified beca use of acidic precipitation. Production of C, bartonii in Crouch Run w as 525.8 mg AFDW m(-2) yr(-1) and was less than that for C, bartonii i n Upper Ball Creek, a high-elevation circumneutral stream in North Car olina (961.0 mg AFDW m(-2) yr(-1), Huryn & Wallace, 1987). This differ ence seemed to be related to differences in the biomass of C. bartonii between the streams, because the P/B ratio for C. bartonii in Crouch Run was 1.4 compared with 5.8 in Upper Ball Creek.