So far, she and her colleagues have only excavated two small test pits at the cave, which contained a number of stone artefacts, bone points, animal remains, shell beads and fishhooks.
Some individuals would therefore not have been caught, since no baited hooks would have been available to trap them, leading to an underestimate of fish stocks in the past.
因为没有可利用的带诱饵的钩子来捕捉它们，个别的鱼没有被捕获，这导致过去人们低估了鱼类的数量。
3
In this case, changes in biomass were estimated by comparing the number of fish caught for every 100 hooks now and in the past.