The purpose of this study was to investigate the improvement effect of biomarkers through the supply of natural diet in the juvenile hybrid abalone (Haliotis discus discus♀*H. madaka♂). For the study, the shell length of about 17 mm and the total weight of 0.83 g were used. The feeding conditions were set as the natural diet group (dried laver) and the formulated diet group, and the experiment duration was 16 weeks. The survival rate was about 14% higher in the natural diet group than the formulated diet group, and growth was also faster in the natural diet group. Shell malformation rate was lower in the natural diet group (7.5%) than the formulated diet group (21.5%). In the biochemical composition, except for carbohydrates, both experimental groups showed similar values. The degeneration of epithelial cells in the hepatopancreatic tubule was lower in the natural diet group than the formulated diet group, and the activity of basophilic cell was higher in the natural diet group. These results indicate that it is worth considering the supply of natural diet for the breeding of juvenile hybrid abalone and the improvement of the quality of the formulated diet (H. discus discus♀*H. madaka♂).

논문에서는 머신비전을 이용하여 컨베이어 시스템에서 이동하는 객체를 계수하는 알고리즘을 제안하였다. 영상처리를 이용한 객체 계수 시스템은 유동인구나 교통량 파악 등의 다양한 산업현장에서 사용되고 있으며, 주로 템플릿 매칭이나 기계학습의 방 법으로 검출하여 추적 후 계수한다. 하지만 빠르게 움직이는 컨베이어 벨트위의 물체를 검출하기 위해서는 연산에 소요되는 시간이 짧 아야 하므로 영역기반의 방법으로 영상처리를 하였다. 본 연구에서는 모양과 크기, 그리고 색깔이 비슷한 전복 치패를 계수하였다. 컨 베이어 시스템은 한 방향으로 동작하는 특성을 이용하여 첫 번째 영역에서 치패를 검출하여 정보를 얻은 것을 기반으로 다음 프레임 에서의 물체의 위치 범위를 계속적으로 변화하여 치패를 검출하고 각각의 획득한 정보를 비교하여 계수하였다. 치패가 간격을 두고 이 동 시에는 정확하게 계수됨을 확인하였으며, 치패가 붙어서 오는 경우에는 크기정보를 이용하여 계수하여 중복되거나 누락됨을 방지 하였다. 본 논문에서 제안한 알고리즘은 컨베이어 시스템 위에서 움직이는 다양한 객체 계수 제어에 적용할 수 있을 것이다.

This study is aimed comparative analysis for business performance of land-based ezo abalone (Haliotis discus hannai) seed farms by standardizing cost structures by region and farming size. The result of survey on average farming incomes by region showed that farming incomes in Haenam and Jindo regions were much higher than those in other regions. Followed by Wando region, incomes in other regions were analyzed to be relatively lower. It is shown that farming incomes became higher as farm size increased. Farming incomes per unit size which were modified from farming incomes by region were highest in Jindo region, followed by East sea region, Wando and Haenam regions. Incomes in Jeju and Yeosu regions were analyzed to be relatively lower. Results on farming incomes per unit size (m2) showed that both farming incomes and profits became higher as size increased. It implies that a scale effectiveness might exist in case of land-based abalone culture system. Impacts of major factors on farming profits and returns on investment in abalone seed aquaculture are summarized as follow. First, only if the survival rate increased by 10% with improvement of component ratio, variable effects became largest. In variable effects of other factors, a variation in Jindo region was largest and on the other hand, a variation in Yeosu region was shown to be smallest.