A look at the 10 biggest volume gainers on Nasdaq at the close of trading:

Central Garden & Pet Co. : Approximately 1,148,300 shares changed hands, a 3,040.8 percent increase over its 65-day average volume. The shares rose $.58 or 6.4 percent to $9.58.

Corinthian Colleges Inc. : Approximately 22,126,900 shares changed hands, a 1,138.0 percent increase over its 65-day average volume. The shares rose $.06 or 18.9 percent to $.40.

Liberty Tax Service : Approximately 237,200 shares changed hands, a 885.8 percent increase over its 65-day average volume. The shares rose $.66 or 2.1 percent to $31.65.

Micros Systems Inc. : Approximately 14,164,700 shares changed hands, a 1,335.5 percent increase over its 65-day average volume. The shares rose $2.21 or 3.4 percent to $67.98.

Nanosphere Inc. : Approximately 8,150,600 shares changed hands, a 1,068.0 percent increase over its 65-day average volume. The shares rose $.20 or 14.6 percent to $1.57.

PLX Technology Inc. : Approximately 14,682,600 shares changed hands, a 5,926.0 percent increase over its 65-day average volume. The shares rose $.54 or 9.1 percent to $6.48.

Parkervision Inc. : Approximately 38,868,300 shares changed hands, a 5,228.1 percent increase over its 65-day average volume. The shares fell $3.16 or 63.1 percent to $1.85.

ProPhase Labs Inc. : Approximately 718,600 shares changed hands, a 879.3 percent increase over its 65-day average volume. The shares rose $.07 or 4.7 percent to $1.57.

River Valley Bancorp : Approximately 8,900 shares changed hands, a 801.2 percent increase over its 65-day average volume. The shares fell $1.57 or 6.1 percent to $24.03.

United Community Bancorp : Approximately 107,200 shares changed hands, a 3,077.6 percent increase over its 65-day average volume. The shares fell $.22 or 1.9 percent to $11.53.