Herz,
Since you seem completely unable or unwilling to answer my simple question about ethics, I'm going to have to go with my own home-grown definition to answer your question.
Ethics: Rules of conduct.
Okay, so what sciences can help us establish proper ethics ?
"Pretty much all of them" was my answer.
Now of course, you're asking for examples, for some reason, because I gather that you are smart enough to think of them yourself, but are playing the ignorant one because to agree on that point would make you less hostile about the subject as a whole. And who likes to admit to being wrong ?
Of course, it stands to reason that EVERY area of knowledge can lead to ethics. Rules of conduct don't need to have a specific rational cause. I could say that, since I collect DVDs, one needs to handle those disks properly, simply because I place some value upon them. It's somewhat arbitrary, but it does follow from my personal preferences and experience. And since it's possible that someone would inherit those DVDs in the future, I'd rather keep them in good condition, and not just for myself.
Science, like any other activity, preference, area of knowledge or field of interest, can lead to someone adopting rules of conduct. Of course, since science tends to be objective, hopefully the ethics that arise from our scientific knowledge can be understood by all.
For example, we pretty much all agree that pain is a bad thing. We don't like it, so we try to avoid getting too much of it. Biology helps us realise (though we had already guessed) that OTHER people, and indeed a whole lot of animals, experience pain. Of course, if you have no empathy at all this knowledge will have no consequence. But usually, we try to avoid giving pain, as well. Hey, biology can even tell you how to relieve pain.
Now I can already hear you saying "but that just leads to a procedure about what to do." So ? Isn't that what "conduct" is ? A social procedure ?
Anyway. Babbling over. Hopefully I made SOME sense.
For further reading:
http://en.wikipedia.org/wiki/Ethics