The Collaborative International Dictionary of English v.0.48:

Barse \Barse\ (b[aum]rs), n. [AS. bears, b[ae]rs, akin to D.
   baars, G. bars, barsch. Cf. 1st Bass, n.]
   The common perch. See 1st Bass. [Prov. Eng.] --Halliwell.
   [1913 Webster]