Perish legally and ecologically: the ineffectiveness of the minimum landing sizes in the Mediterranean Sea
Perish legally and ecologically: the ineffectiveness of the minimum landing sizes in the Mediterranean Sea
复制标题
合法和生态上的灭亡：地中海最小登陆面积的无效性
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
G. Armenis
中科院分区：
文献类型：
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作者：
K. Stergiou;Dimitrios K. Moutopoulos;G. Armenis
最小上岸尺寸（MLS）是一种用于管理渔业的技术措施，目的是让足够的幼鱼存活和产卵。在这项研究中的实际和生态效率的MLSs设置由欧盟（条例1967/2006）和希腊立法的13种鱼类捕获的五个齿轮在爱奥尼亚海进行了测试，使用长度测量从22 382个人。估计长度小于MLS的个体的百分比。此外，还将MLSs与50%成熟时的长度（L）进行了比较，并估计了每个物种和长度小于L的渔具捕获的个体百分比。长度小于MLS的个体的平均百分比从延绳钓的5.9%到海滩围网渔船的42.6%不等，表明这种措施的实际效率低下。此外，所有的MLS都小于相应的L和L- SE值，并且在各个物种中，捕获的未成熟个体的平均百分比非常高，从延绳钓的55%到海滩围网的92%不等，这表明绝大多数捕获的个体甚至没有机会产卵一次。因此，现有的MLSs对于可持续管理而言在生态上是低效的。
Minimum landing size (MLS) is one technical measure used to manage fisheries with the aim of allowing enough juveniles to survive and spawn. In this study the practical and ecological efficiency of the MLSs set by European Union (Regulation 1967/2006) and Greek legislation for 13 fish species caught with five gears in the Ionian Sea was tested using length measurements from 22 382 individuals. The percentage of individuals with lengths smaller than MLS was estimated. In addition, MLSs were compared against length at 50% maturity (L₅₀) and the percentages of individuals caught per species and gear with lengths smaller than the L₅₀ were also estimated. The mean percentage of individuals caught with lengths smaller than MLS ranged from 5.9% for longliners to 42.6% for beach-seiners, showing the practical inefficiency of this measure. In addition, all MLS were smaller than the corresponding L₅₀ and L₅₀ - SE values and across species the mean percentage of the immature individuals caught was very high, ranging from 55% for longliners to 92% for beach-seiners, indicating that the vast majority of the individuals caught did not have the chance to spawn even once. Thus, the existing MLSs are ecologically inefficient for sustainable management.