I have bred a male as small as 450. He fathered a clutch that season but it took a lot for me to get the weight on him the next season because he didn't want to eat.

I have a male right now that is about 250g and he has been producing sperm plugs since he was about 200-220g. I have a big 2100g girl waiting for him, but I'm going to wait until he is at least 400g, maybe even 500g.