Yes. Thank you for the question.
First of all, I should point out that this map is based on matching the climate in North America to the climate in its native range. The silver carp is found much further north in its native range than is the bighead carp. In fact, I was working in Khanka Lake, on the Russian-Chinese border north of Vladivostok. This is a large lake that gets about a metre of ice in the winter, and we were catching silver carp there. This fish is very much a cold tolerant species. The main difference between the silver carp and bighead carp is simply the silver carp is found further north in its native range.