PRIMARY PRODUCTION REQUIRED TO SUSTAIN GLOBAL FISHERIES
PRIMARY PRODUCTION REQUIRED TO SUSTAIN GLOBAL FISHERIES
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DOI：
10.1038/374255a0
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发表时间：
1995-03-16
期刊：
影响因子：
64.8
通讯作者：
CHRISTENSEN, V
中科院分区：
文献类型：
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作者：
PAULY, D;CHRISTENSEN, V
1988-1991年报告的世界渔业年渔获量平均值(9430万吨)被分成39个物种组，根据已发表的48个营养模型，分配了从1.0(食用藻类)到4.2(金枪鱼)的不同营养级，提供了6个主要水生生态系统类型的全球覆盖。维持每组物种所需的初级生产量然后根据营养水平之间10%的平均能量转移效率来计算，这个值是重新估计的，而不是假设的。维持报告渔获量所需的初级产量加上2700万吨被丢弃的副渔获量，相当于全球水产初级产量的8.0%，几乎是先前估计的四倍。按生态系统类型划分，公海系统的需求仅为2%，淡水、上升流和陆架系统的需求在24%至35%之间，这证明了目前对可持续性和生物多样性的担忧是合理的。
THE mean of reported annual world fisheries catches for 1988-1991 (94.3 million t) was split into 39 species groups, to which fractional trophic levels, ranging from 1.0 (edible algae) to 4.2 (tunas), were assigned, based on 48 published trophic models, providing a global coverage of six major aquatic ecosystem types. The primary production required to sustain each group of species was then computed based on a mean energy transfer efficiency between trophic levels of 10%, a value that was re-estimated rather than assumed. The primary production required to sustain the reported catches, plus 27 million t of discarded bycatch, amounted to 8.0% of global aquatic primary production, nearly four times the previous estimate. By ecosystem type, the requirements were only 2% for open ocean systems, but ranged from 24 to 35% in fresh water, upwelling and shelf systems, justifying current concerns for sustainability and biodiversity.