치리 ( Cultriculus eigenmanni ) 의 형태 및 생활사에 관한 연구 - Ⅱ. 체장 (體長) , 체중관계와 (體重關係) 비만도에 (肥滿度) 대하여 -

김을배,김영길 ( Eul Bae Kim,Young Gill Kim ) 한국하천호수학회 1985 생태와 환경 Vol.18 No.1·2

A total of 378 Chili fish were randomly sampled at 4 locations including Mangyo^˘ng reservoir, Oehang, Osan and Rapo water-way in the vicinity of Kunsan from June, 1983 to October, 1984 in order to investigate allometry according to their habitat and sex. The body weight and fatness conditions against the mean body length of the specimens from Rapo water-way were remarkably decreasing. And this result seems to be caused by seasonal difference. The relationships between total length and body weight are expressed, W=0.0116 L^(2.84795) : Oehang, Mangyung and Osan, W=0.00507 L^(3.06155) : Rapo. Considerable significance is recognized in these equations. Nevertheless, the significant difference is not found between location and sex in the same period.

제주도산 (濟州島産) 실뱀장어의 소상동태에 (溯上動態) 관한 연구 - 특히 환경요인과의 관계를 중심으로 -

김을배 ( Eul Bae Kim ) 한국하천호수학회 1974 생태와 환경 Vol.7 No.3·4

In order to know the upstream mechanism and the related environmental factors of Glass-Eel in Cheju island, samples and environmental data were collected and analyzed during the period from March 5, 1973 to April 19, 1974 in 5 stations, including Cheonji stream. The results are summarized as follows: 1. The upstream duration of the Glass-Eels lasts about 140 days from Jan. 20 to June 15. The upstream period can be divided by their frequency as following: 1) Beginning Jan. 20-mid. Feb. 2) Beginning of peak late Feb.-late Mar. 3) Last of peak early Apr.-late Apr. 4) Last early May-mid. May 5) Stopping period late May-mid. June 2. The yearly total upstream fries in Cheju island as a whole amount about 60kg of which Cheonji stream takes the share of 45.30% ; Kangjeong stream, 32.29%; Shinyangri, Sungsan-myun, 18.68% ; Oedo, 2.55% ; and Ongpo stream, 1.18%. It suggests that southbound streams take the outstanding majority of the total upstream fries, i.e. 96.27%. 3. The mean body length of fries was 56.37mm in 1973, 56.23mm in 1974 : comparing to the Japanese data the fry of Cheju island was 1.048-1.411mm smaller than the Japanese. Generally the early upstream fries tend to be larger than the late ones. 4. In Cheju Island, temperature was suspected not to be a limiting factor which controlled the upstream amount; but when the water temperature downs sharply, the number of fries tended to be reduced. 5. The numbers of upstream fries seemed to be large during both 1st to 5th and 13th to 15th of the moon age. However, the correlation coefficient r=-0.0597 suggested that the relation of the moon age to the number of upstream fries was negligible. 6. The relation between cloud degree and upstream number of fries was negligible as r=0.1239. In other word, upstream amounts tended to be relatively large at cloud degree 6, but there were still some amounts of upstream at degree 0. These facts suggest that cloud degree cannot be a limiting factor to control the upstreams. 7. Tide is the most important limiting factor. During two hours from 90 minutes before high water to 30 minutes after the high water, about 80% of total samples were collected. It suggests that high water provides better condition to upstream fries. 8. As r=5.5287, the correlation between the tidal range and upstream numbers is relatively high. The greatest upstream numbers appeared at high water period when 1.5 to 2.5m tidal interval was recorded. 9. Diurnal change of upstream numbers tends to show high value at the time 3 hours after sunset. Particularly when the time matches with high water the number reaches greatest. 10. Phototaxis of fry appeared to be negligible as r=-0.1154. The light which was used during collecting samples seemed to promote catch efficiency rather than concentrating school. 11. The Glass-Eels which submerged beneath the bottom were observed during ebb-tide period of day time. The result showed that early-stage fries with under-developed body pigment took negative stereotaxis; However elver took positive stereotaxis. 12. Marking and recapturing experiment proved that the younger Glass-Eels showed more positive rheotaxis. On the other hand, the upstream speed was calculated 2.5 m/minute, which was far slower than 36 m/minute reported by foreign scientist. But the speed seemed to be affected by condition of streams and ebb-tide.

천지천산 (天池川産) 부착조류의 (付着藻類) 현존량과 (現存量) 그 회전속도에 (回轉速度) 대하여

김을배 ( Eul Bae Kim ) 한국하천호수학회 1975 생태와 환경 Vol.8 No.3·4

The standing crop and the production rate of the algae attached on the experimental stones were studied for one month from September to October, 1973 in Cheonji stream, Cheju Do. The results are summarized as follows: 1. The standing crop of the algae was estimated at 29.47 gr/㎡ in wet weight for one month. The production value was almost equal to that of the result in the Gangjung stream, Cheju Do, but this value was much smaller than that of the other streams. 2. Comparing the food intake value of Plecoglossus altivelis to the standing stock, the density seems to be over-populated almost 3 times of the equilibrium population size. 3. From the fact that the average production value per day was 0.31gr/㎡, the algae should grow for approximately 26 days to reach the level of the average standing crop under the natural condition. 4. The production peak reached during the first 5th to 7th day after staying stones, at which time the production value was 0.75 gr/㎡ per day. Within the first 7 days, about 49% of the average standing crop was obtained, at that time, the corresponding coefficient was 2.17. 5. From the fact that the turnover rate of the algae decreased after 10 days, it is expected that the continuing consumption can accelerate the production rate.

산란장에 (産卵場) 있어서 은어 Plecoglossus altivelis 의 식성과 (食性) 난섭식 (卵攝食) 에 대하여

김을배 ( Eul Bae Kim ) 한국하천호수학회 1974 생태와 환경 Vol.7 No.1·2

This study deals with the feeding characteristics and intake of eggs Plecoglossus altivelis in spawning areas. The stomach contents from spawning fish which were caught in the spawning bed at Chunji Stream (which is located in Seogwipo, Jeju Island ) during the spawning season on the 4th of December, 1972, were used for investigation. The results obtained are as follows; 1. The stomach contents of Plecoglossus altivelis during the spawning season were about 50% less than during the summer. There was a great difference between the feeding condition of the male population and that of the female population. Therefore, it was confirmed that the male population never shows normal feeding activity. 2. The Plecoglossus altivelis ate 10 families, 22 different species of algae growing on stones. These composed their stomach contents. Among them, the diatoms were the most dominant species eaten. In the case of sand, 73% of the male fish took in sand, while only 33% of the female fish took any in. 3. The stomach contents and the index of fullness of the male population were no more than 32% and 41% respectively in comparison with the female population. However, 67% of the male took in eggs. That is 3 times more than in the case of the female, i.e., 20%. 4. The number of eggs intaken to the volume of the stomach contents was male, 12.88% and female 5.32%. We can see through this value that the male fish intake eggs noticeably more than the female do. 5. The sex ratio was almost equal to that of the fish that intook eggs. The rate was female 1 to male 3. 6. If it were not for the additional eggs from the spawning process, then all the eggs in the spawning bed would be completely intaken and consumed by the fish in 29 days.

한라산의 플랑크톤

김을배 ( Eul Bae Kim ) 한국하천호수학회 1968 생태와 환경 Vol.1 No.1

치리(Cultriculus eigenmanni)의 形態 및 生活史에 關한 硏究 Ⅰ. 卵發生과 孵化仔魚에 對하여

김을배(Eul-Bae KIM),김영길(Young-Gill KIM) 군산대학교 수산과학연구소 1994 군산대학교 수산과학연구소 연구논문집 Vol.1 No.-

The Chili fish, one of the most common species of the freshwater fishes, is distributed in the river basins of the western coast of Korea. However, any studies on this fish, especially its development or life history, have not been made so far. The authors, therefore, carried out an experiment to reveal some characteristics of egg development and fry in this fish. Far accomplishing this study, we caught some adult Chili fish by means of a casting net at raceway in the vicinity of Kunsan in June and July, 1983; then, we injected 0.1 cc Gonadotrophic hormone 1,000 unit solution (Puberogen) in order to induce the spawning on the abdominal cavity of male and female respectively. Approximately 12 hours after injection, the artificially fertilized eggs by using of the dry method and the naturally fertilized eggs were observed simultaneously in the aquarium (30 x 50 x 70cm). The fertilized eggs, in spherical shape, were sperative, demersel, adhesive nature and 1.38~1.59mm in diameter. The light yellow yolk was opaque and 1.17~1.27mm in diameter. The hatching of eggs took place at 29.5 hours after fertilization under the condition of 23.5~25.0℃ water temperature. Basically there were not found so many different aspects in comparison with the common species of Cyprinidae in the development process of eggs: however, there were a few noticable characteristics, that is, pigment cells, eye balls and blood circulation are invisible, or the velocity of egg development is rapid, seemed similar to the Loach's egg. Newly hatched larvae with the yolk sac(2.39 mm in size) were 3.87~ 3.99 mm in total length and their myotome number was expressed as 28+15=43. About 20 hours after hatching, a caudal and a pectoral fin as well as an anus began to orgin. In addition, a few malanophore showed on the upper regin of the yolk sac of the larvae whose size was 4.73mm in total length. The larvae developed about 5.02mm in total length, and the median fin fold in the abdome extended forward to two thirds or beyond of the yolk sac at 50 hours after hatching. Stimultaneously, the eye balls and mouth also appeared. After 3 days, the yolk sac nearly disappeared, and the larvae (5.4 mm in total length) with perfect eye balls began to swim for themselves for the first time. Also, the specialization between the gill arches and the ailmentary canal, the development of each fins except dorsal fin as well as the blood circulation obviously distinguished in this stage. The larvae whose total length was 5.68 mm was very brisk; also, the development of the dorsal fin rudiment, nearly perfect formation of each organs and the function of the upper and lower jaws were noticeably observed 5 days after hatching.

치리(Cultriculus eigenmanni)의 形態 및 生活史에 關한 硏究 Ⅱ. 體長, 體重關係와 肥滿度에 對하여

김을배(Eul-Bae KIM),김영길(Young-Gill KIM) 군산대학교 수산과학연구소 1994 군산대학교 수산과학연구소 연구논문집 Vol.1 No.-

A total of 378 Chili fish were randomly sampled at 4 locations including Mangyong reservoir, Oehang, Osan and Rapo water-way in the vicinity of Kunsan from June, 1983 to October, 1984 in order to investigate allometry according to their habitat and sex. The body weight and fatness conditions against the mean body length of the specimens from Rapo water-way were remarkably decreasing. And this result seems to be caused by seasonal difference. The relationships between total length and body weight are expressed, W=0.0116 L2.84795 : Oehang, Mangyung and Osan, W=0.00507 L3.06155 : Rapo. Considerable significance is recognized in these equations. Nevertheless, the significant difference is not found between location and sex in the same period.

붕어의 폐사에 미치는 合成洗劑의 急性毒性

이정렬(Lee Jeong-Yeol),김영길(Kim Young-Gill),김종연(Kim Jong-Yeon),김을배(Kim Eul-Bae) 군산대학교 수산과학연구소 1988 水産科學硏究 Vol.- No.4

Short-term acute toxicity of synthetic detergent(harmful and non-harmful detergents) to crusian carp, Carassius auratus was examined by static bioassay. The crusian carp was exposed to 10 different concentration of synthetic detergent for 240 hours in order to determine median lethal concentration(LC50). In case of harmful detergent, the 100% mortality was showed within 72 and 24 hours for 14 and above 20 ppm, but showed below 30% for until 10 ppm. For the non-harmful detergent, 80% of mortality was appeared for 450 ppm only The 48hr, 96hr and 240hr of median lethal concentration was found 12.85ppm, 11.86ppm !ind lO.36ppm respectively. The permissible toxicant concentration of acute toxicity to crusian carp was 1.19ppm. Gill tissue of dead crusian carp showed necrosis and blood vessel also damaged Epithelium of gill lamellae showed pronounced change in even 8 ppm below. During the test period, gills of survival animals appeared also change for non-harmful detergent. So, animals showed effection of detergent even though animals exposed to non-harmful detergent for long times.

Sulfonylurea계 제초제 저항성 물달개비 생태형의 경합기간별 벼의 생장 및 수량

권오도(Oh Do Kwon),국용인(Yong In Kuk),이도진(Do Jin Lee),신해룡(Hae Ryong Shin),박인진(In Jin Park),김을배(Eul Bae Kim ),구자옥(Ja Ock Guh) 韓國雜草學會 2002 Weed&Turfgrass Science Vol.22 No.2

소라, Turbo cornutus SOLANER의 Energy 수지에 관하여

김을배,이정열 제주대학교 해양연구소 1978 해양자원연구소연구보고 Vol.2 No.-