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首页> 外文期刊>Turkish Journal of Veterinary and Animal Sciences >Effect of steel wire and claw size on the sea snail (iRapana venosa/i) catch in a Black Sea beam trawl fishery
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Effect of steel wire and claw size on the sea snail (iRapana venosa/i) catch in a Black Sea beam trawl fishery

机译：钢丝和爪子尺寸对黑海拖网捕捞中海蜗牛（ Rapana venosa ）渔获量的影响

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摘要

The effects of the claw size used on the shoes of the traditional sea snail beam trawl and the effect of the steel wire used between the shoes on catching efficiency were investigated on the Samsun coast of the Black Sea. A traditional beam trawl with steel wire and with a claw length of 5.5 cm (T) was compared to modified beam trawls with steel wire (M1) and without steel wire (M2) with a claw size of 0.5 cm. The operations were performed as T-M1 and then T-M2 hauls using the dual parallel towing method. There was no significant difference in the amount of target species in the comparison of T (70.12) and M1 (63.23) according to the average catch per unit effort (CPUE, kg hsup?1/sup) values obtained (P = 0.399). In the T-M2 comparison, 49% higher CPUE value was achieved with the T (77.37) beam trawl and there was a significant difference in terms of targeted species (P = 0.002). As a result, it was observed by underwater observations that steel wire on the beam trawl had a negative effect on the ground, and it was found that the bycatch ratio with the T beam trawl was higher than that with the modified beam trawl.
机译：在黑海的Samsun海岸，研究了爪形尺寸对传统海蜗牛拖网渔船的鞋子的影响以及鞋子之间使用的钢丝对捕捞效率的影响。将传统的带钢丝，爪长为5.5厘米（T）的拖网拖网与带钢丝（M1）和不带钢丝（M2）且爪尺寸为0.5厘米的改进型拖网拖网进行了比较。该操作以T-M1的方式执行，然后使用双平行拖曳方法进行T-M2的牵引。根据获得的每单位努力的平均捕获量（CPUE，kg h ？1 ）值，T（70.12）和M1（63.23）的比较中，目标物种的数量没有显着差异（ P = 0.399）。在T-M2比较中，使用T（77.37）光束拖网可以将CPUE值提高49％，并且在目标物种方面存在显着差异（P = 0.002）。结果，通过水下观察观察到，拖网拖缆上的钢丝对地面具有负面影响，并且发现，T拖网拖网的兼捕率高于改良拖网拖网的兼捕率。

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