|Ledge state||Urchin abundance||Quality and price||Dominant harvesting strategies||Nature and value of fishermen’s knowledge about state.|
Initial absence of harvesting.
Broad-scale, long-term, widely known,
but of little competitive value.
Harvesting causes a transition to
conveyor belt state
Kelp starts to grow back, urchin roe content increases, few predators
|b. Conveyor belt||
Sufficient numbers of urchins left to balance kelp growth.
|High.||Moderately selective (harvesting from feedline).||Ledge specific, short-term, tightly guarded, competitively valuable.|
Heavy, continuous harvesting
creates transition to kelp-dominated
Predators abundant, little or no urchin survival post-settlement
||Absent or very low.||No fishing.||No fishing.||Broad-scale, long-term, widely known, but of little competitive value.|