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hand jigging
相关语句
  相似匹配句对
     Hand.
     Hand .
短句来源
     On Hand
     说“手”
短句来源
     APPROACHES ON HAND SQUID JIGGING TECHNIQUE IN THE CENTRAL NORTH PACIFIC OCEAN
     北太平洋中部柔鱼钓作业中手钓技术的分析与探讨
短句来源
     Elementary Analysis on the Factors Affecting Hand-Jigging Efficiency of Symplectoteuthis oualaniensis
     影响鸢乌贼手钓上钩率的因子探讨
短句来源
     Discussion on Jigging Control Project
     跳汰控制方案研究
短句来源
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Hand jigging operation,plays an important role in the squid jigging fishery in NorthPacific Ocean. Based on field measurements, this paper analyzed the main technical factors affecting hand jiiging effciency, including jigging rate, jigging cycle and hauling up speed of hand jigging line, and concluded that the suitable technical indexes were as follows; 1) jigging rate; 5 times/s, 2) jigging cycle; 2. 16 s/time, 3) hauling up speed; 70-75m/s.

由于手钓在北太平洋柔鱼捕捞作业中占有重要地位,本文对影响手钓渔获产量的几种技术因素作了实际测试和一定的分析,包括:抖动频率、每次抖动时间、拉线速度等。实际测试结果表明,对于捕捞体重为2kg左右的柔鱼,其以上三种技术指标的适宜范围分别为5次/min、2.16S/次、70~75m/min。

Broken strength of arms and tentacula of squid is a significant factor affecting the jigging-off rate.By on-site measurement,the broken strength of arms and tentacles of Symplectoteuthis oualaniensis in Northwestern Indian Ocean was analyzed and their jigging-off rate in hand-jigging was obtained.The results show that the bearable strength of tentacle is as 0.7 times only as that of its body weight and the jigging-off rate caused by tentacle broken is nearly 100%.The broken strengths...

Broken strength of arms and tentacula of squid is a significant factor affecting the jigging-off rate.By on-site measurement,the broken strength of arms and tentacles of Symplectoteuthis oualaniensis in Northwestern Indian Ocean was analyzed and their jigging-off rate in hand-jigging was obtained.The results show that the bearable strength of tentacle is as 0.7 times only as that of its body weight and the jigging-off rate caused by tentacle broken is nearly 100%.The broken strengths of the other four arms are respectively as 2.30,2.05,2.06 and 1.87 times as that of its body weight.The average jigging-off rate for all arms and tentacula is about 10%.

鱿鱼的腕足断裂强度是影响鱿钓脱钩率的重要因素。通过现场实测,分析了印度洋西北部海域鸢乌贼(Symplectoteuthis oualaniensis)的腕足断裂强度对手钓作业脱钩率产生的影响。结果表明,鸢乌贼的每根触腕仅能承受的拉力相当于体重的0.7倍,因此,钓捕过程中,因触腕断裂造成的脱钩率接近100%;而另外的第I-IV腕足的断裂强度分别是其体重的2.30、2.05、2.06和1.87倍;5对腕足整体的平均脱钩率接近10%。

The effects of four factors on jigging efficiency,fishing water depth,period of fishing time,degree of stomach fullness(DSF) and phase of the moon,were analyzed according to the cruising data from Northwest Indian Ocean Symplectoteuthis oualaniensis fishing ground.Statistics shows that hand-jigging efficiency under different fishing water depth and three different periods during one fishing night,i.e.evening,midnight and dawn,has great difference.DSF of these three periods indicate a trend...

The effects of four factors on jigging efficiency,fishing water depth,period of fishing time,degree of stomach fullness(DSF) and phase of the moon,were analyzed according to the cruising data from Northwest Indian Ocean Symplectoteuthis oualaniensis fishing ground.Statistics shows that hand-jigging efficiency under different fishing water depth and three different periods during one fishing night,i.e.evening,midnight and dawn,has great difference.DSF of these three periods indicate a trend from low to high and then low again.During midnight and dawn time,the changing tendencies of DSF and numbers of jigged-on show a negative correlation.Under the influence of the phase of the moon,hand-jigging yield has ascended 3 or 4 days before the first day of the lunar month,and it has descended obviously 5 or 6 days before the 15~(th) day of the lunar month.

根据印度洋西北部鸢乌贼(Symplectoteuthis oualaniensis)作业渔场的现场调查数据,分析了作业水深、作业时段、摄食等级和月相等因子对手钓上钩率的影响。统计表明,晚上、午夜和凌晨3个不同时段和不同作业水深对手钓上钩率均有显著性影响。3个时段中,其摄食等级呈先低后高再低的现象。午夜和凌晨,上钩率的变化趋势与摄食等级的变化趋势呈显著的负相关。在月相的影响下,离朔日三四天之前,手钓产量呈上升趋势;离望日五六天之前,手钓产量呈明显的下降趋势。

 
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