Was Zoro using Haki?

[SSJ2]

http://kissmanga.com/Manga/One-Piece-Digital-Colored-Comics/Chapter-508?id=328748#19

Was he using a very basic form of observation Haki here? He could tell that this Kuma wasn't the same one by the atmosphere of the situation.

 

[xmysticgohanx]

I thought this was going to be about Zoro finding his katana in the Daz Bones arc

He probably did use a weak and primitive form of it