What pitch does the pianist play for male voice when the score is written in the bass clef.is it that pitch or an octave lower.
If the music is written for a bass singer, the pitches in bass clef are sung in the same octave as played on the piano. If it's for tenor and written with a treble clef, one drops the octave, though. (If you look close, there's usually a little "8" at the bottom of the treble clef to indicate this.)
The F Clefs consists of Baritone, Bass, and Subbass Clefs. These are designed to allow writing the low register notes easier.
In terms of translating these notes for the vocalist, I say it depends on his voice. Baritone and Bass is typically fitting for most singers with low registers.
However, you can look at your situation differently and find your vocalist's registers first, then write the appropriate clefs and notes for him.
You can refer to wikipedia for some illustrations.
If you're looking at a real book that is written for the bass instrument, then what you're seeing is the melody as it would be played on an upright/electric bass. Those notes will fit in the vocal range of a bass singer. So if your singer has a bass vocal range, then you don't need to move the melody up an octave from where it's written. If your singer is has a baritone vocal range, then the song will likely be a little bit of a stretch as written. For a tenor or an alto singer, you would definitely need to move the written melody up an octave to place it in their vocal range.
As a side note, the note that is heard from an acoustic/electric bass is an octave below the pitch that is written on the bass clef. It would be a very different answer if you asked, "what pitch does the pianist need to play when the score is written in bass clef in order to match the note heard from an upright/electric bass?" In this case, the pianist would need to transpose down an octave. However, that only applies for the bass instrument and not for a bass vocalist.