How to say “What makes this tuna a sustainable choice?” in Japanese

In Japanese

このマグロの調達(ちょうたつ)が持続可能(じぞくかのう)だと言(い)える根拠(こんきょ)は何(なん)ですか？

Kono maguro no chōtatsu ga jizoku kanō da to ieru konkyo wa nan desu ka?