No, as has been stated before, fusing at the battery is to prevent fires, arcing, etc, in the event of an accident/short/whatever between the battery and the end component. You fuse each component at the end of the run. For example, I have a 100A fuse at the battery and 4GA wire going from the engine compartment through the firewall and on to the trunk. That wire goes to a distribution block. Each component that taps into the distro block has its own appropriately sized fuse. All of my component draws add up to about 80A, so I used a 100A fuse.
Crutchfield has a well worded explanation you should read.
You should email the company that makes the amp and ask what fuse they recommend. I think it's pretty stupid that they neglected to put that piece of information in the manual.