This study aims to understand the opening efficiency of the finless porpoise escape guide net by the type of extension net that is the part to which the escape guide net is attached in stow net. To this end, extension nets were manufactured in full size and the net mouth area and towing tension were investigated according to the towing speed (0.2, 0.4, 0.6 and 0.8 m/s) and the type of extension net (25 mm net and raschel net) in the water tank. As a result, the net mouth area of the guide net was larger when the raschel net was used for the extension net than when the 25 mm net was used under all towing speeds. In addition, regardless of the type of extension net, the net mouth area reached about 80% of the maximum value at a towing speed of 0.4 m/s. In the field, fishing operation of stow net is performed only when the current speed is above 0.4 m/s. Therefore, the speed of 0.4 m/s was confirmed as a meaningful value to determine whether it is possible to operate. As a result of analyzing the relationship between the net mouth area of the guide net and the towing tension, it was confirmed that the difference in the net mouth area of the guide net according to the type of the extension net was due to the difference in the solidity ratio.

서 론
재료 및 방법
    실험 어구
    수조 실험 장치
    실험 방법
결과 및 고찰
    연장망의 그물 구성에 따른 유도망의 망폭과 망고
    연장망의 그물 구성에 따른 유도망의 전개 성능 분석
    연장망의 그물 구성에 따른 실험 어구의 예인 장력
결 론
References

• 이건호(국립수산과학원 서해수산연구소 자원환경과) | Gun-Ho LEE (Fisheries resources and Environment Division, West Sea Fisheries Research Institute, National Institute of Fisheries Science) Corresponding author
• 김현영(국립수산과학원 서해수산연구소 자원환경과) | Hyun-Young KIM (Fisheries resources and Environment Division, West Sea Fisheries Research Institute, National Institute of Fisheries Science)
• 송대호(국립수산과학원 서해수산연구소 자원환경과) | Dae-Ho SONG (Fisheries resources and Environment Division, West Sea Fisheries Research Institute, National Institute of Fisheries Science)