THE LIMITS OF EXPLOITATION: A PRECAUTIONARY APPROACH
THE LIMITS OF EXPLOITATION: A PRECAUTIONARY APPROACH
复制标题
剥削的局限性：预防性方法
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
G. Mertz
中科院分区：
文献类型：
--
作者：
R. Myers;G. Mertz
众所周知，鱼类资源开发率的生物限度取决于最高人均繁殖率和渔业的年龄选择性。通常，在估计收获的生物限度时，选择性被视为固定的。从预防的角度来看，应该控制选择性。一个简单的模型被用来证明禁止捕捞幼鱼的安全效益。该模型导致的最大人均补充率的自然重新调整，它表明，如果这个数量是>1，然后产卵至少一次的政策将防止崩溃的股票，如果捕捞死亡率目标被超过。（至少产卵一次的政策要求鱼类只有在产卵一次后才容易受到商业渔具的影响。
As is well known, the biological limit to the exploitation rate of a fish stock is determined by the maximum per capita reproductive rate and the age selectivity of the fishery. Customarily, the selectivity is treated as fixed when the biological limit to harvesting is estimated. From a precautionary perspective, one should control selectivity. A simple model is used to demonstrate the safety benefits of prohibiting the harvesting of juvenile fish. The model leads to a natural rescaling of the maximum per capita recruitment rate, and it is shown that if this quantity is >1, then a spawn-at-least-once policy will prevent a collapse of the stock if fishing mortality targets are exceeded. (A spawn-at-least-once policy requires that fish become vulnerable to commercial gear only after having spawned once.)