• Proceedings of the Korean Aquaculture Society Conference
• /
• 2004.05a
• /
• pp.105-106
• /
• 2004

• Proceedings of the Korean Aquaculture Society Conference
• /
• 2004.05a
• /
• pp.107-108
• /
• 2004

• Journal of Aquaculture
• /
• v.5 no.2
• /
• pp.127-142
• /
• 1992

A feeding experiment was carried out to investigate the availability and feasibility of fish processing by-products as a substitute for frozen round fish in moist pellet diets for flounder, Paralichthys olivaceus. A control diet was prepared by incorporating $50{\%}$ frozen horse mackerel and $50{\%}$ commercial binder feed. In test diets the frozen horse mackerel of the control diet was replaced with either tuna scrap, tuna viscera, flatfish offal, deskinned hagfish, or tuna viscera ($20{\%}$) with frozen horse mackerel ($30{\%}$). Eighty flounders, 13.4 g in mean body weight, were stocked in 12 aquaria ($250\;{\ell}$ each) and fed six experimental diets for the first 28-day experiment. For the second 23-day experiment, forty flounders,44.8 g in mean body weight, were stocked and fed the same experimental diets. All treatments were duplicated. There were no significant differences in growth, feed efficiency and nutrient utilization among fish fed experimental diets containing either frozen horse mackerel, deskinned hagfigh, flatfish offal or tuna viscera with frozen horse mackerel. However, the feeding performances of fish fed experimental diets containing tuna scrap or tuna viscera were significantly lower than those of the control diet (P<0.05). There were no significant differences among the treatments on the proximate analysis values of the whole body. However, the crude lipid content of liver of the fish fed the experimental diet containing tuna scrap was significantly lower than that of the others. The results indicate that deskinned hagfish, and flatfish offal could be successfully substituted for frozen fish portion of moist pellet diets for flounder, but tuna viscera could only be partially substituted.

• Journal of the Korean Society of Marine Environment & Safety
• /
• v.16 no.4
• /
• pp.381-386
• /
• 2010

We have cultured the bluefin tuna in Yokjido, Tongyeong with floating cage which was vulnerable to harmful dinoflagellate, Cochiodinium polykrikoides. This study inspected a vertical migration of phytoplankton and Chl-a for reasonable sinking depth in floating cage. Furthermore, we analyzed the fluctuation of the phytoplankton including harmful dinoflagellates occurring in Yokgido for 6 years. Total cell density showed a significant monthly variation and the flora was predominated with diatoms. Gymnodinium sp. occurred 19 times, the greatest number of occurrence in all kinds of dinoflagellates during summer. In particular, the total number of occurrence at C. polykrikoides was 8, and harmful dinoflagellates such as Karenia brevis/Fibrcapsa japonica occurred. The relationship between Chl-a concentration/total cell number and sunset/sunrise was significant and reasonable sinking depth in floating cage was found to be at least 3m from the water surface, which was associated with massive fish kills caused by C. polykrikoides.

• The Journal of Fisheries Business Administration
• /
• v.29 no.1
• /
• pp.139-159
• /
• 1998

본 연구는 미국 오레곤주의 수산업 특성을 개괄적으로 살펴본 것이다. 먼저, 오레곤의 상업적 수산업을 역사적으로 살펴보면 2가지 주요한 계기가 있음을 알 수 있다. 첫째는 자급자족 차원에서의 연어생산을 수출품으로 변화시킨 연어통조림 생산기술의 발전이고, 둘째는 현대식 트롤어업이 도입된 점이다. 오레곤에서 주로 사용되는 어구ㆍ어법은 트롤, 채낚기, 연승, 통발, 형망 등이며, 생산어종은 연어, 게, 새우, 참치, 대구 등이다. 1995년 오레곤은 약 2억 4천 파운드의 수산물을 생산하여 미국 연안주중에서 6위를 차지하고 있고, 생산금액에서는 12위를 기록하였다. 한편, 양식업은 아직 성행하지 않아 그 생산품종 및 생산량은 미미한 실정이다. 그 주된 이유 중의 하나는 양식시설을 하기 위해서는 여러 관계기관의 허가를 필요로 하는 등 행정상의 절차가 복잡하기 때문이다. 오레곤의 수산자원관리는 우리나라에 비해 암계의 어획금지, 통발 등 정치어구ㆍ어법에 대한 인망일수의 제한, 조개류의 판매가능시간의 제한 등 몇가지 특징을 들 수 있다. 오레곤의 수산업관리제도(연안으로부터 3마일 이내)를 살펴보면, 아직 TAG제도를 도입하지 않고 있으며 생산요소역입제한방식이 채택되고 있다. 즉, 상업적으로 허용된 어종을 어획하려는 어업자는 등록절차를 필히 거쳐야 어업행위를 할 수 있으며, 등록수를 제한할 필요가 있는 특정한 어업(연어, 새우, 가리비 등)에 대해서는 행정관청으로부터 허가를 얻고 어업행위를 해야 한다. 즉, 허가어업은 등록어업보다 더욱 제한적인 어업행위를 말하며, 허가권에 대해서는 자유로운 매매양도가 허용되어 있다. 수산물의 마케팅시스템에 대해서는 우리나라에 지배적인 형태인 경매제도가 도입되어 있지 않다. 즉, 모든 수산물은 개인적인 거래계약에 의해서 유통된다. 다만 마케팅경로에 참여하고 있는 모든 구성원은 일정한 등록절차를 마쳐야 하며, 주내에서 거래되는 수산물의 일관된 통제나 관리를 위해 관계기관에 거래량을 필히 신고해야 한다. 우리나라의 중도매인은 주로 생산지의 수협(또는 내륙지 도매법인)과 도매상의 사이에 존재하나 오레곤의 중도매인은 마케팅경로 어디에든 존재하고 있다.

• Journal of Marine Life Science
• /
• v.4 no.2
• /
• pp.96-105
• /
• 2019

The mugilidae fishes are common euryhaline species that live in coastal marine waters to freshwater areas. The taxonomy and nomenclature of the mugilidae fishes still remain unresolved because of their morphological similarities. Among the mugilidae fishes, most commonly consumed in Korea, are grey mullet (Mugil cephalus) and red lip mullet (Chelon haematocheilus). It is generally called 'mullet' without distinguishing between two mullets. Therefore, the aim of this study is to examine the scientific names and common names of mullet species used in Korea from the domestic journals and Korean old documents. The scientific name of grey mullet is M. cephalus, but that of redlip mullet is C. haematocheilus. But the genus of redlip mullet is still mixed with Chelon, Mugil, and Liza. The standard name of two mullet is not distinguished in the Korean dictionary, but they were clearly distinguished in the Japanese, English, and Chinese dictionaries. In the ancient Korean references, the mullet was called 'Chieo' or 'Sueo'. In most of the old literature, the distinction between grey mullet and redlip mullet is not clear. However, in Jasaneobo, it was written separately from grey mullet and redlip mullet, and attaching "ga" was different from now. The Korean standard name of redlip mullet is 'gasungeo', however, the fishermen in Jeollado and Gyoungsangdo call it 'chamsungeo'. Considering the negative perception of 'ga' character, it is proposed to change 'cham(眞)' instead of 'ga(假)' to improve economic value of red lip mullet.

• Journal of Aquaculture
• /
• v.11 no.2
• /
• pp.213-221
• /
• 1998

The effects of differen concentrations of Obosan as a feed additive dietary herb were examined on survival rate, growth, feed conversion ration and condition factor in olive flounder (paralichthys olivaceus). Effectiveness of dietary Obosan with optimized concentration for 48 weeks were also observed with regard to growth performances and yields. All groups fed diets containing 0.15, 0.3 and 0.6% of Obosan revealed significantly higher survival rate than control group (P<0.05). Growth, feed conversion ratio and condition factor of olive flounder fed diets containing Obosan were considerably improved when compared to those of controls (P<0.05). The 0.3% of dietary Obosan was proven to be the optimal concentration in all parameters tested. The dietary Obosan (0.3%) for 48 weeks showed significantly higher surval rate than control (P<0.05), and also improved yields in weight gain (19.0% improvement), specific growth rate (4.8%), feed conversion ratio(13.6%) and condition factor (10.8%), significantly (P<0.05).