That means a higher proportion of what is in the sea is being caught, so the real difference between present and past is likely to be worse than the one recorded by changes in catch sizes.

• 那表示占更高比例的海洋生物被捕获，所以过去的数据和现在的数据之间的差别要比通过捕捉量的变化记录下来的差别更加大。