Limnoperna fortunei의 초기발생 및 유생에 관한 연구

최신석,신창남,Choi, Shin Sok,Shin, Chang Nam 한국패류학회 1985 The Korean Journal of Malacology Vol.1 No.1

The maturity of gonads, early development of the fertilized egg, spawning period, and morphogenesis of larvae in Limnoperua fortunei were studied from October, 1981 to November, 1982 as on attempt to identify its life cycle. 1) Active motility of its sperm was observed at late May, and matured egg could be found at late June. 2) It was estimated that the spawning was occured from late August. This species was belong to the short-term breeder because it finished its spawning within 20 days. 3) It has free-living trochophore and D-shaped larva stage. The shell lengths of early, middle, and D-larval stage were $140.0{\mu}m$, $167.6{\mu}m$ and $210.0{\mu}m$, respectively. The shell heigths of each stage were $97.3{\mu}m$, $137.6{\mu}m$ and $178.2{\mu}m$, respectively.

중석광산지역의 (重石鑛山地域) 수질과 (水質) plankton 상에 관한 연구

최신석,신창남 ( Shin Sok Choi,Chang Nam Shin ) 한국하천호수학회 1976 생태와 환경 Vol.9 No.1·2

Chemical conditions and plankton fauna in the polluted and clear waters were comparatively investigated at the upper stream of the south Han-river situated in Yung-wol, Kangwon-Do during the period of August 1 and August 30, 1969. The results obtained are as follows: 1. Water temperature, pH, NH₃,-N, NO₂-N, NO₃,-N, PO₄^(---), Cl^- was found to be similar both in the polluted and clear waters. And the contents of dissolved oxygen in both waters were statistically very significant. 2. In the polluted water 11 species were appeared especially two species among them were clearly dominant: Cymbella tumida and Filinia longiseta. The frequent appearance of the two species was statistically very significant. 3. In the clear water were found various plankton ranging from 25 to 28 species, especially Gyrosigma accuminata and Ceratium hirundinella were dominant. The frequent appearance of these two species was statistically less significant. Plankton at the confluence of the waters were similar to those in the clear water. 4. Plankton fauna in the polluted and clear waters was affected by the dissolved oxygen called limiting factor which had resulted from the polluted water of tungsten mine.

Limnoperna fortunei 유생(幼生)의 성장(成長) 및 변태(變態)에 관(關)한 연구(硏究)

최신석,김정섭,Choi, Shin-Sok,Kim, Jung-Sup 한국패류학회 1985 The Korean Journal of Malacology Vol.1 No.1

The metamorphosis and the growth of larva in Limnoperna fortunei were studied from October, 1981 to December, 1983. 1) The larva of this species is observed in the three different stages in the form of D-shaped. The shell length of the larva in the early stage is $130.44{\mu}m$ to $143.60{\mu}m$ and in the middle stage $161.67{\mu}m$ to $184.11{\mu}m$. In the late stage the length size of the larva increases up to $194.55{\mu}m$ to $208.45{\mu}m$. The shell height is $103.19{\mu}m$, to $119.47{\mu}m$, $126.51{\mu}m$ to $157.63{\mu}m$ and $136.87{\mu}m$ to $176.35{\mu}m$ in the three stages respectively. Thus the growth ratio of shell length to shell height is 1:0.75. 2) The metamorphosing stage begins when the shell height becomes larger than $210{\mu}m$ and the shell length exceedes $260{\mu}m$.

대청호의 어류 군집

최신석,송호복,황수옥 ( Shin Sok Choi,Ho Bok Song,Su Ok Hwang ) 한국하천호수학회 1997 생태와 환경 Vol.30 No.2

The fish fauna and the dynamics of fish community were investigated in the Daechong reservoir from May to October 1996. The collected fishes were classified into forty species of eight families. Of the them, dominant species was Lepomis macrochirus(relative abundance: 27.48%) and subdominant species was Carassius auratus (16.63%). Also, Zacco platypus (10.03%), Carassius cuvieri (6.27%) and Hemibarbus labeo (4.47%) were numerous. Korean endemic species were thirteen species (32.5%). The biomass of fishes were L. macrochirus (10.4 kg), C. auratus (10.3 kg) and C. cuvieri (4.1 kg). Dominant index, diversity index and evenness index were calculated 0.127, 1.126 and 0.703, respectively. Composition of age in superior species was stabled by the total length frequency distribution. In this study, the exotic fish was collected Cyprinus carpio nudus, C. cuvieri, L. macrochirus and Micropterus salmoides, and these relative abundance was 33.95%. In the view point of species composition, the fishes of still water has been increased and species diversity has been decreased after dam construction.

대청땜 (大淸) 상류의 담수어에 (淡水魚) 관하여

최신석 ( Shin Sok Choi ) 한국하천호수학회 1978 생태와 환경 Vol.11 No.1·2

1. The distribution of fresh-water fish at the four studied stations in the Geum-river were surveyed from August 1977 to September. All the studied stations are located within the submerging area by constructing the Dae-cheong dam in the future. 2. Forty two species including thirty four genera were collected. Thirteen species of them were found to be the characteristic species of Korea. 3. Zacco platypus, Micropkysogobio yaluensis, Coreoleusisus splendidus were found to be the common dominant species at four studied stations. 4. Age distribution could be assumed by determining the number of individuals belong to the certain body-length group in each species. The number of individuals belong to one year old groups was biggest in each species and it became smaller as they getting old. The most probable cause of the decrease in the number of individuals of the older age group seems the overfishing of the inhabitants around the studied area. 5. The species diversity and equitability were higher in the upper stream. The number and composition of the species in the upper stream was more diverse and ecologically more settled than the downstream. 6. Leiocassis dumerili, Gnoproktopterus mylodon, Cortobagrus brevicorpus, Pseudopungtungia nigra, Squalibarbus curricutus are very important species for the study of the distribution pattern of the fresh-water fishes in Geum-river, therefore those five species should be preserved carefully.

대합 ( Meretrix lusoria ) 의 인공반란 및 치패 사육에 관한 연구

최신석 ( Choi Shin Sok ) 한국하천호수학회 1976 생태와 환경 Vol.9 No.1·2

1. This research work was attempted to study on the artificial discharge of eggs, the artificial fertilization by NH₄OH-seawater solution and the larval culture in order to develop the fertilized eggs of Meretrix lusoria up to the settling stage, July 1974 through September 1975. 2. The experment on the artificial discharge of eggs showed comparatively the higher discharge rate of 35% when induced by 1/70N, 25% by 3/100 N and 25% by 5/100N NH₄OH seawater solution, respectively. In case of experimenting the discharge rate of eggs by the thermal stimulation from 14℃ to 28℃, the two individuals discharge a small number of eggs. Thus, the artificial discharge by chemicals was more effective than by the thermal stimulation. 3. In the early embryonic development of M. lusoria treated with 1/100 N NH₄OH-seawater solution, the polar body of the embryos appeared fifty-three minutes after fertilization. The embryos developed to two cell stage one hour three minutes later, to morula stage three hours forty-eight minutes later, and to trochophore six hours later, respectively. 4. In the larval culture reared with Monochrysis lutherii and Chaetoceros simplex var. calcitrans, the larvae reached to D-shaped stage one day after fertilization. The young clams in D-shaped stage showed the shell length of 108.67±2.31μ and the shell height of 85.78±1.89μ Eleven days later, it reached to the umbo stage with the shell length of 144.60±1. 92μ and the shell height of 124. 50±1. 61μ. The young clams developed to the metamorphosing stage with the shell length of 207. 5μ and the shell height of 180μ twenty days later. 5. The growth rate of shell length (L) and the shell height (H) of the clam from the period of the D-shaped stage through the metamorphosing stage was formulated as follows: H=0.51L+38.67(μ) with the correlation coefficient r=0.56.

금강모치 ( Moroco kumgangensis ) 의 난 발생과 자어의 성장

송호복,최신석 ( Ho Bok Song,Shin Sok Choi ) 한국하천호수학회 1997 생태와 환경 Vol.30 No.1

The mature adults of Moroco kumgangensis were collected from the upper South-Han river at Dong-myon, Chungsun-gun, Kangwon-do on April 1996 and fertilized eggs were reared to observe the developmental characters and the morphology of larvas at water temperature of 16±1℃. The eggs were globosity, yellowish brown, submergence and adhesive type and diameter of the eggs were 2.31±0.094 mm after absorption of water. Cleavage was progressed at intervals of an hour and five minutes after fertilization, and optic cup and somites (18∼22) were observed in sixty three hours. In ninety six hours, the number of heart beat was 40 times/min. and movement of embryos was active. Hatching began about five days after fertilization and the newly hatched larvae were 5.28±0.453 mm in total length and the number of heart beat was 44 times/min. Melanophore appeared within three days after hatching and the larvae were 11.05±0.389 mm in total length and reached the free swimming stage in ten days after hatching. In twenty five days, the number of heart beat was 162 times/min, dorsal, anal and caudal fin rays were 7, 7 and 25∼30 respectively and reached 11.92±0.275 mm in total length.

금붕어의 간장과 신자의 미세구조에 미치는 endosulfan 과 홍삼이 영향

배인화,최신석,이춘구 ( In Hwa Bae,Shin Sok Choi,Choon Koo Lee ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.4

Detoxication effect of red ginseng on fine structures of liver and kidney in goldfish treated with endosulfan was investigated by means of electron microscopy. Fine structure of hepatocyte treated with endosulfan showed partial rupture of nucleus, decrease of glycogen content as compared with the control group. While, in hepatocyte treated together with endosulfan and red ginseng, structures of nucleus and mitochondria, and glycogen content were similar with those of the control group. In the kidney treated with endosulfan, proximal and distal tubule cells were disintegrated and mitochondria were swollen. Microvilli were fragmented and arranged irregularly. In the kidney treated together with endosulfan and red ginseng, lysosomes and vacuoles were reduced in size and number in comparison to those of the group treated with endosulfan.

On the Microdistribution of Fresh-Water Fish, Coreoleuciscus splendidus(Gobioninate) from Korea

최기철,최신석,홍영표,Choi, Ki-Chul,Choi, Shin-Sok,Hong, Young-Pyo The Ichthyological Society of Korea 1990 韓國魚類學會誌 Vol.2 No.1

한국산(韓國産) 담수어(淡水魚)이며 한국(韓國) 특산종(特産種)인 쉬리 Coreoleueiseus splendidus의 미세분포(微細分布), 분포양상(分布樣相), 종(種) 상관관계(相關關係)을 알아 보기 위하여 휴전선(休戰線) 이남(以南)의 전(全) 지역(地域)(특별시(特別市), 직할시(直轄市), 시(市), 군(郡), 면(面))을 대상(對象)으로 1966년 5월부터 1989년 11월에 이르기까지 조사(調査)한 결과(結果)는 다음과 같다. 1. 조사지역(調査地域) 4909개(個) 장소(場所)중 같은 장소(場所)를 묶어 정리한 결과 31927개의 sites이었고 이 중 본 종이 분포(分布)하는 장소(場所)는 659개의 site로서 출현빈도(出現頻度)는 20.65%이었다. 2. 본 종이 분포하는 하천(河川)은 임진강, 한강, 금강, 웅천천, 만경강, 동진강, 섬진강, 광양, 동천, 사천천, 곤양천, 낙동강, 삼척, 오십천, 남해도의 삼화천, 거제도의 구천천등 14개의 독립하천(獨立河川)이었고 영산강, 안성천, 삽교천 수계등에는 본 종이 분포하지 않았으며 이들의 미분포(未分布)가 1차적인지 2차적인지는 알 수가 없다. 3. 본 종의 분포(分布)는 대부분이 구성비가 25%미만(未滿)으로 단독(單獨)의 분포는 희소(稀少)하고 우세종(優勢種)으로 분포하는 경우는 드물었다. 4. 본 종은 하천의 본류(本流)와 지류(支流)의 순도구배(順度句配)가 증가(增加)되는 중상류(中上流)지점에 주로 분포하며 하천의 하류부(下流部)와 최상류부(最上流部)에는 분포(分布)하지 않았다. 5. 본 종이 분포하는 거리(距離)에 따른 고도(高度)의 평균구배(平均勾配)(기울기)는 2.6이고, 분포(分布) 최소구배(最小句配)는 0.29, 분포(分布) 최대구배(最大勾配)는 5.65의 범위(範圍)의 하천(河川) 여울 지역(地域)에 주로 분포하였다. 6. 본 종이 분포(分布)하는 곳에 50% 이상의 출현빈도를 보이는 종은 10종으로서 그 순서는 Zacco platypes > Punglungia herzi > Z. temmincki > Mierophysogobio yaluensis > Hemibarbus longirostris > Pseudogobio esocinus > Carassius auralus > Coreoperca herzi > Cobilis koreensis > Odonlobutis platyeephala의 순서이며 총 개체수에 있어서는 Z. platypus > C. auratus > Z. temmincki > H. yaluensis > P. herzi > P. esoeinus > C. koreensis > O. plalyeephala > H. longiroslieis > C. herzi의 순서이였다. 7. 수계별(水系別) 종(種) 상관분포(相關分布)에 따르면 함께 분포(分布)하는 종(種)(P < 0.05)은 Cyprinidae 20종, Cobitididae 5종, Salmonidae 1종, Bagridae 1종, Siluridae 1종, Amblycipitidae 2종, Serranidae 2종, Eleotridae 1종이었다. 8. 본 종과 수계별(水系別) 분포(分布)를 달리하면서 생태적(生態的) 동위(同位)의 종(種) 상관성(相關性)을 갖는 종(種)은 Cyprinidae에서는 A. signifer와 A. linlbala, M. koreensis와 M. yaluensiso 이고, Cobitidae에서는 C. koreensis, C. longicorpus, C. rotundicaudata와 N. multifaciata이며, Amblycipitidae의 L. andersoni와 L. mediadiposalis이였다. Studies on the microdistribution, distributional aspect and affinity of Korean endemic species, SHIRl, Coreoleueiseus splendidus in th southern half of the Korean peninsula were carried out from May, 1966 to November, 1989. This species was found in 14 independent rivers and streamlets of the south Korea ; Yimjin R., Han R., Kum R., Ungchun S., Mangyung S., Dongjin R., Somjin R., Kwangyang East S., Sachun S., Gonyang S., Nakdong R., Samchukosip S., Samhwa S. of Namhae Island and Guchun S. of Geojae Islands, and were not found from Youngsan R., Ansung S. and Sabgyo S. This species was not common and independent comprising less than 25% of the total fish population in all habiting sites. Distributional zone was in the middle or upper streaches of main streams and tributaries. The average slope of distributional zone was 2.6, minimum slope was 0.29 and maximum slope was 5.56. Thirty-three species were found to occur along with this fish and 10 species of them occurred with more than 50% frequency. They were; 20 sp. of Cyprinidae, 5 sp. of Cobitidae, 1 sp. of Salmonidae, 1 sp. of Bagfridae, 1 sp. of Siluridae, 2 sp. of Amblycipitidae, of Serranidae, and 1 sp. of Eleotridae. Some species of fish appeared to have the same ecological position even though they have different distributional zones. These species were as follows; Acheilognathus signifer and A. limbata, Micriophsogobio koreensis and M. yaluensis in Cyprinidae, Cobitis koreensis, C. longicorpus, C. rotundicaudata in Cobitidae, Liobagrus andersoni and L. mediadiposalis in Amblycipitidae.

송사리와 대륙송사리의 산란 , 난발생 및 자어의 성장

박두신(Du Shin Park),최신석(Shin Sok Choi) 한국하천호수학회 1998 생태와 환경 Vol.31 No.2

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