A Consideration on the Long Years Trend of the Fisheries Fluctuation in Relation to Sea Conditions
A Consideration on the Long Years Trend of the Fisheries Fluctuation in Relation to Sea Conditions
复制标题
与海况有关的渔业波动长期趋势的思考
DOI：
10.2331/suisan.23.368
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发表时间：
1957
影响因子：
0.4
通讯作者：
M. Uda
中科院分区：
文献类型：
--
作者：
M. Uda
由于自然界中鱼类种群（P）在自然环境条件的某些无形影响下不断重复生长和衰退（伴随着其面积的扩大和缩小），因此，每种鱼类（沙丁鱼、鲱鱼、金枪鱼等）的渔业条件和由此产生的渔获量（N），以近世纪或二十至三十年、五十至六十年的间隔逐年周期性地变化（以周期性或某些不规则的方式）。(See表1a、B）一般而言，对于周期性衰减（或增长）产率。??（一）
Since the fish populations (P) in nature repeat their growth and decay (accompanying with extension and contraction of their areas) under some invisible influences of natural environmental conditions, the fisheries conditions and the resulting amount of catch (N) for each fish species (sardine, herring, tuna etc.) vary year by year cyclically (in pe riodic or some irregular ways) with near a century or twenty to thirty, fifty to sixty years intervals. (See Table 1 a, b) In general as for the periodic decaying (or growing) yield. ?? (1)