얼룩동사리 ( Odotodutis odontodutis interrupta ) 의 산란 행동과 초기생활사에 대한 연구

최신석,강정현 한국하천호수학회 1992 생태와 환경 Vol.25 No.2

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.

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 $260{\mu}m$.

Anodonta woodiana hukudai MODELL의 生活史에 關한 硏究

崔信錫,吳炅煥,崔申洙 충남대학교 자연과학연구소 1980 學術硏究誌 Vol.7 No.1

The life cycle of fresh water bivalve, Anodonta woodiana hukudaz, was investigated at the tributary of the Dongjin River, Buan-Kun, Chunlabuk-Do from September 1978 to August 1979. 1. A woodiana hukudai was one of the summer breeders, whose breeding phenomenon was observed from February to August, 1979. The highest rate of Its breeding was observed in June. 2. Fish species infected with glochidia of A. woodiana hukudai were Oryzias latipes, Carassius carassius, Morco oxycephalus, Pseudoperilampus uyekii, and Zacco platypus. The most common species infected with glochidia was O. latipes. 3. The highest rate of infection with glochidia was observed on O. latipes from June 5 to June 20, 1979. Its infection rate was 20.4- 32.1 %. 4. Most glochidia of A. woodiana hukudai were found on the pectoral 2nd caudal fin of O.latipes. The average number of glochidia was 3.1 per fish

Monochrysis lutheri에 對한 無機養料의 影響

崔信錫,辛昌男 충남대학교 자연과학연구소 1976 學術硏究誌 Vol.3 No.2

In this study we investigated the effect by the lack of inorganic minerals on Monochrysis lutheri, grown in the Hirano solution, from June to July 19 76. The numbers in Monochrysis lutheri appeared to delay in increase by the 5th day and get to maximum population around 15th day in Hirano solution. When nirogen, phosphorus and iron were taken up respectively from Hirano solution, the growth rate a s well as the saturation values of the individual namber abated. The differences between the numbers in control Hirano solution and those under the above mentioned conditions were of statistical significance except for the case when silicon was deficient in Hirano soution. The survey on concentration of nitrogen showed that the numbers increased significantly at more than 1.6ml, but phosphorus showed no difference due to its concentration.

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.

大蛤과 동죽의 稚貝着生의 土性에 關한 硏究

崔信錫,辛昌男 충남대학교 자연과학연구소 1977 學術硏究誌 Vol.4 No.1

The investigation of young clam beds of Meretrix lusoria and Mactra veneriformis was conducted from July to August 1969, 1974 and 1975 in tidal flat area of Inchon. 1. The result of the analyses of the soil texture of young beds of Meretrix lusoria and Mactra veneriformis was as follows. Meretrix Zusoria: 1%∼2%, silt 30%∼40%, fine sand 60%∼70%, coarse sand 1.5%∼4%. Mactra veneriformis: clay 0.5%∼3%., siit 15%∼70 %, fine sand 50%∼90%, coarse sand 0.1%∼2%. 2. The habitat of young clams of Mactra veneriformis was larger than Meretrix lusoria in the area. The young clams of Meretrix lusoria set in the Lehm soil, and Mactra veneriformis the Lehm and Schuffiger soil contained a lot of sand. 3. The habitat density of young clams of Meretrix lusoria was lower than of Mactra veneriformis. This fact had statistical significance (p<0.05).

Lanceolaria acrorhyncha의 生活史에 關한 硏究 : 姙卵期와 幼生附着에 관하여 On the breeding season and glochidia infection

崔信錫,鄭惠珠 충남대학교 자연과학연구소 1982 忠南科學硏究誌 Vol.9 No.1

The life cycles of the fresh water bivalve, Lanceolaria acrorhyncha, was treated in this thesis. We have investigated the phenomena such as the maturation of the gonads, breeding season, early development of the eggs, glochidia infection of fish, etc. The samples were collected from the tributaries of the Geum River during the period from February in 1980 through September in 1981, and the experimental observation was carried out under the natural conditions. The main results of present study may be summarized as: 1. The breeding seasons of Lanceolaria acrorhyncha, judged from gonad maturation, occurred twice annually, i.e. during the period of middle March-late April and middle July-middle August. The marsupium infection of certain species of fish is believed to occur during the May-June period with relatively higher rate in June. 2. The glochidia infection of certain species of fish is believed to occur during the May-June period with relatively higher rate in June. 3. The fresh water fish to be infected by the glochidia were the five species of Pungtungia herzi, Acheilognathus intermedia, Pseudogobio esocinus, Zacco platypus and Pseudobagrus emarginatus, among which the Zacco platypus showed the highest infection rate of 3.7%. 4. For most species of the infected fish, the pectoral fin showed a relatively higher rate of infection compared with other parts of the body.

錦江上流 魚類群集의 季節的 分布에 關한 硏究

崔信錫,洪榮杓 忠南大學校 環境問題硏究所 1983 環境硏究 Vol.1 No.2

The seasonal differences of species diversity and dominant species of fresh-water fish community in the upper stream of Geum River were determined. The similarity of the community were also determined. Seven families, thirty-four species could be identified among 2823 individuals collected from 1979 and 1982. The largest number(422) of individuals was collected on April. The largest number(26) of species was identified on June. Pungtungia herzi, Zacco platypus, Gobiobotia bravibarba, Pseudobagrus Sp., Coreoleuciscus splendidus, Pseudobagrus emarginatus, Coreoperca herzi, and Odontobutis obscurus were the dominant species in Spring. In summer, C. herzi and C.splendidus were identified as dominant species. Acheilognathus signifer,P.emarginatus, and C.herzi were the dominant species in Autumn. During the winter, A.signifer, P.herzi, Zacco temmincki and Odontobutis obscurus were identified as dominant species. The species diversities of spring and summer were found to be higher than those of autumn and winter. The fish community of spring was very similar to that of summer.

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.