Turkish Journal of Fisheries and Aquatic Sciences
2014, Vol 14, Num, 1 (Pages: 21-30)
Fishing Performance of an Octopus minor Net Pot Made of Biodegradable Twines
Seonghun Kim 1 ,Seongwook Park 1 ,Kyounghoon Lee 1
1 National Fisheries Research and Development Institute, Fisheries Engineering Division, 216 Gijanghaean-ro Gijang-gun Gijang-eup Busan, Republic of Korea
DOI :
10.4194/1303-2712-v14_1_03
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Gillnets and net pots are made of synthetic fiber as polyester (PE) and polyamide (PA). These are often lost by heavy
weather or trawling of the active fishing gears. Lost gears result in the ghost fishing because these are non-degradable in
seawater and damage to spawning grounds or habitats. To address these problems, biodegradable nets composed of aliphatic
polyester were developed. This study describes four types of biodegradable net pots for capturing Octopus minor in Southern
Korea, which is an area associated with high rates of net pot loss. The fishing performance of the biodegradable pots was
compared to that of commercial net pots. The net pot with a synthetic body and biodegradable funnel (PE/Bio) produced
approximately 50% of the catch collected using a commercial net pot (PE/PA). Conversely, net pots with a biodegradable
body and a synthetic funnel (Bio/PA) produced the same amount of catch as the commercial net pot. The completely
biodegradable net pot (Bio/Bio) caught 60% of that using the commercial net pot. These findings suggest that net pots
consisting of a biodegradable body and PA funnel may be effective in capturing Octopus minor. Partially biodegradable net
pots (Bio/PA) are as effective as commercial net pots, yet uniquely allows a method of capturing Octopus minor without
affecting the marine environment.
Keywords :
Octopus minor, fishing, Southern Korea, gillnets