zsh alias causes error if used in fish

I have the following aliases in my zsh:

alias -- -='cd -'
alias ..='cd ..'
alias ...='cd ../..'

When I switch to fish, by manually typing fish and pressing Return, the first alias causes an error:

- (line 1): function: -: invalid function name
function -  --description 'alias -=cd -';  cd - $argv

How to workaround this?