This study was examined for activity of aggregation pheromone trap with residual effect of insecticides against Riptortus pedestris. Time of escape was from aggregation pheromone trap researched 49.74 min (ET99) and 65.01 min (ET99) with 1st and 2nd instar nymph respectively. Six insecticides for the stink bugs were treated to 3 different materials (wood, metal, and plastic). Bifenthrin and fenitrothion were showed 100% insecticidal activity at 48 h to all developmental stage of R. pedestris. Residual effect of bifenthrin and fenitrothion on plastic material were showed 100% insecticidal activity over 15 day after treatment with 1st, 3rd instar nymphs, and adults except 5th instars nymph. In field test using plastic material trap with two pesticides, 1st instar nymphs and adults were showed 100% mortality until 10 day after treatment. These results indicate that R. pedestris might be managed using aggregation pheromone trap with insecticides.

In the autumn of 2000 and spring of 2001, field surveys were conducted to estimate the effectiveness of artificial reefs (type cube, 2×2×2m3) that were established in the four islands of Bangnyeong, Socheong, Daeyeonpyeong and Ganghwa in Kyonggi Bay, the west coast of Korea during 1995 and 1996. The condition of reefs was examined through SCUBA diving and a side-scan sonar. Much of the reefs in Daeyeonpyeong and Ganghwa area were buried in bottom sediment. Despite an intensive search in Bangnyeong area, even a cluster of reefs was not found and most of them seemed to be buried by sand waves. Thus an appropriate investigation on the sediment transport should be included in pre-assessment for the expected performance and protection of artificial reefs. Distribution of average CPUE in natural fishing ground (control) was estimated by bootstrapping simulation and possible comparison of CPUE between control and reef areas (treatment) were made in Bangnyeong and Socheong (Experiment I). Positive reef effect was detected in Socheong but CPUE of treatment in Bangnyeong was varied between or lower than the 99% CPUE confidence intervals of the control. Control/treatment abundance and biomass of fishes and invertebrates were tested by paired t-test and sign test (Experiment II). Only four cases among 22 showed significant positive effect. Based on the results, the cube artificial reef in Socheong was inferred as an affirmative one. Floor type was hypothesized to be one of the probable agents in determining the effectiveness of artificial reefs.

This study was investigated the potential of ducks and fish trap for the control of golden apple snail, Pomacea canaliculata, in paddy field and water canals. The smaller size of duck (700 g) preyed snails than the bigger one (1,300 g). The consumption of two ducks was bigger under plastic house. They preyed over 90% on the second days of release. The release time of ducks was more effective at seven days after inoculation of snails than simultaneous. Duck could suppress the density of snails at any time from month after inoculation. Four ducks per 30 ㎡ could control snails in an irrigation canals. The number of attracted golden apple snail per week was 216 in big fish trap (Φ 15 ㎝) with menthol paste which for a carp.

동해안의 연안성 어족인 빨간횟대에 대해 망목크기 등을 달리한 8종류의 장구형 통발을 사용하여, 2003년 6월부터 12월까지 총 6차례에 걸쳐 어선 2척을 용선하여 조업한 어획실험으로부터 망목선택성 곡선을 구하여 합리적인 자원관리에 대한 기초 자료를 구하고자 하였다. 망목 크기가 20mm와 35mm인 두 통발의 빨간횟대 어획물로부터 체장에 따른 어획비율의 차이에 대해 특별한 경향을 발견할 수 없었다. 망목 크기가 20mm와 55mm인 두 통발의 경우에 대해 SELECT방법을 이용하여 equal split model 과 estimated split model을 적용한 결과, AIC 값이 적은 전자가 더 적절한 모델이므로, 빨간횟대의 경우는 이들 두 통발에 대한 입망률의 차이는 없는 것으로 나타났다. 망목 55mm의 통발에서 SELECT 모델로 구한 50% 어획될 빨간횟대의 전장은 22.0cm였다. 망목 크기가 20mm, 35mm, 55mm인 통발의 어획 자료에 Kitahara의 방법으로 logistic식을 적용하여 추정된 선택성 곡선식은 와 같았고, 현재 규정 망목 크기인 35mm 장구형 통발에 대해 50% 어획될 빨간횟대의 전장은 21.4cm이었다.