。
It depends on the heat, the pot, and the type of shellfish.
Literal
Heat-power [and-と] pot [and-と] shellfish [possessive-の] type [depends-on-による] [feminine-わ].
A matter-of-fact cooking answer. 火力 in a kitchen context means burner strength. The と linking three items is the exhaustive listing particle — these are specifically the three factors. The final わ is feminine sentence-ending, softening the statement. The honorific お in お鍋 is natural for domestic topics in women's speech.