Sockeye salmon are semelparous.

红鲑鱼终生只产卵一胎。

Everybody needs vitamin d, which can be found in foods like sockeye salmon, eggs, and milk.

每个人都需要维生素d，就在食物如红大马哈三文鱼、蛋类和牛奶中能够找到它。

That's exactly what the Sockeye Salmon does - normally blue and silver they turn red and green before spawning.

而这正是红鲑鱼们所面临的情况——它们通常是蓝色和银色的，但产卵之前它们就会变成红色和绿色的。

This season only 1.7m of the 10.4m sockeye salmon that were forecast to return to the Fraser river in fact made it-a 50-year low.

原本预计有1040万尾红鲑会洄游到Fraser河，实际上却只有170万尾——创下了五十年来的新低。

Many migrating Fraser sockeye (both outbound as young smolts and inbound as mature fish) pass some two-dozen salmon farms in the Broughton Archipelago.

许多洄游到Fraser河的红鲑，包括降河洄游的幼鱼和溯河洄游的成鱼，都会经过位于布劳顿群岛的约24个鲑鱼养殖场。

Nailing down the differences between sockeye and Chinook salmon could take years, however.

不过要能区别红鲑和国王鲑，可能还要数年的分析研究。