Tegner M J, Dayton P K
Science. 1977 Apr 15;196(4287):324-6. doi: 10.1126/science.847476.
Coexisting sea urchins Strongylocentrotus purpuratus and S. franciscanus exhibit different recruitment patterns. Juveniles of the former species are found in a variety of habitats, whereas juveniles of the latter occur almost exclusively under the spine canopy of conspecific adults. The commercial harvest of S. franciscanus thus seems to affect nursery grounds as well as the reproductive potential of exploited populations.
共存的海胆紫海胆和加州紫海胆表现出不同的补充模式。前者的幼体出现在各种栖息地，而后者的幼体几乎只出现在同种成年个体的棘冠之下。因此，加州紫海胆的商业捕捞似乎会影响育苗场以及被捕捞种群的繁殖潜力。
