제주배꼽털달팽이(Aegista guelpartensis) 의 세포학적연구

권오길,이준상 江原大學校 附設 環境硏究所 1991 環境硏究 Vol.8 No.-

The mitotic and meiotic chromosomes of the gonadal tissues from Aegista quelpartensis were examined by air-drying technique. Chromosome number of A. quelpartensis was 28(haploid) and the mitotic chromosome was consisted of 15 metacentric pairs, 10 submetacentrics, and 3 telocentrics. The longest chromosome was about 3.3pm and the shortest was 1.0pm in length.

어류의 패내 산란과 석패과 유생의 어체부착

권오길,박갑만,이준상,송호복 江原大學校 附設 環境硏究所 1991 環境硏究 Vol.8 No.-

This study was carried out to determine the attachment parts and rates on the host fish and the successive stages of the glochidial encystment. A scanning electron microscope observation of the glochidia, the larvae of freshwater brivalve, Anodonta arcaeformis flavotincta, on the host fish, Carassius auratus, was conducted. The attachment rates on the host fish were 30.1%, 22.3% on the pectoral, the caudal, and the pelvic and anal fin, respectively. Glochidia, once attached to the host, have become encysted within 27 hours. The glochidia in fish tissues have sloughed between 13 days and 15 days when the water temperature was 16℃ in laboratory. During encystment, the epithelial cells of the host fish migrated actively toward the attached glochidia and covered them. In the encystment process, the encysted tissues in the host have become loose in seven days and exposured a pat of the glochidium in eight days after infection. No changes of the glochidial size have found before attachment and after sloughing.

衣巖湖의 貝類에 關한 硏究 : A study on the gonadal tissues and demibranchs of Corbicula fluminea(Palaeoheterodonta: Corbiculidae)

권오길,이준상,박갑만 江原大學校 附設 環境硏究所 1989 環境硏究 Vol.6 No.-

의암호에 서식하는 재철(Corbicula fluminea)을 실험재로로 하여 생식세포형성, hermaphrodite에 의한 성비의 계정성 그리고 이에 따른 반새의 변화와 정확한 산란시기를 밝히고자 조직학적 방법에 의한 견구 조사를 실시하였다. 총 118개의 개체중 female 32개체(27.1%), female-hermaphrodite 75개체(63.5%)hermaphrodite 32개체(2.5%), male-hermaphrodite 7개체(5.9%), male 1개체(0.4%)로 전체적으로 female의 경향이 높았다. 산란은 2월과 3월에 난을 방출하는 난생의 형태이고 7월이후 11월까지 glochidia를 방출하는 난태생의 형태를 나타내었다. 外半?(outer-demibranch)가 보육낭으로 이용될 수도 있으나 內半?(inner-demibranch)가 주로 보육나으로 작용하였다. 수관 분리는 주로 inner-demibranch에서 나타났고, 산란시기에는 많은 개체가 수관이 분리되어 있었다. Corbicula fluminaea, one of two species in the family Corbiculidae living in the Lake Uiam was used as an experimental material. This research was done in order to deon in order to identify and describe the visceral sex. the demibranch morthology, and the seasonal gonad activity. The sexuality of C. fluminea was male, male-hermaphrodite (with a preponderance of testicular tissue over ovarian tissue), hermaphrodite (with approximately equal amount of male and female ponadal tissue), female-hermaphrodite (with a preponderance of the ovarian tissue), and female. The non-marsupial demibranch (namely, outer 2 in females and female-hermaphrodite, two in males and males and male-hermaphrodites) was divided by the secondary sept that in males and male-hermaphrodites) was divided by the secondary septa that produced secondary watertubes, resulting in triparitite organization. But, the outerdemibranch of all kinds has exhibited feebly the triparitite organization. In this species larvae were produced over two extended time periods, one in spring(oviparity) and one in fall (dvoviviparity).

衣巖湖에 棲息하는 줄납자루(Acheilognathus yamatsutae Mori)의 産卵 및 發生 特性에 關 한 硏究

송호복,권오길 江原大學校 附設 環境硏究所 1989 環境硏究 Vol.6 No.-

This study was made to expand the knowledge of the relationships between the mussels and the bitterlings (Acheilognathus yamatsutae Mori) and the materials were collected in lake Uiam from Mar. 1987 to Oct. 1988. The female fish has developed a prominent ovipositor and the male sidplayed a nuptial color during reprodductive period from the late April to August. The territory-defending behavior was four types and the extent of territory was about 60cm in diameter and 30cm in height. The mussel was the most important factor to stimulated the reproductive behavior rather than male and female. The number of total mean egfs in a fish was 300 and the mean egg size was 1.97mm in length and 1.74mm in breadth of ovoid shape. The preference of the oviposition of fish to the messels was order of Unio douglasiae, Lamprotula gottschei, Anodonta fukudai and A. woodiana. The egg began to hatch approximately 33 hours after insemination and reached the free swimming stage within 22 days after insemination at water temperature 25±1℃. The sex ratio of the male to the female was 1:1.73 and approached to an adult-shaped fish from about 40mm of body length. The contents of stomach were the algae and zooplanktons.

한국산 달팽이과 14종의 생식기관에 관한 연구

이준상,권오길 한국패류학회 1994 The Korean Journal of Malacology Vol.10 No.1

줄납자루, Acheilognathus yamatsutae Mori(Cyprinidae)의 산란 조건

송호복,권오길 江原大學校 附設 環境硏究所 1996 環境硏究 Vol.13 No.-

The spawning condition was investigated of the bitterling, Acheilognathus yamatsutoe Mori in aquariums. Sexual responses in male and female bitterlings were very sensitive to the mussel rather than the other sex. But spawning behavior was shown ouly when all of the male, the female and the mussel were present. And the sexual response was not shown at all when there was no direct contact with the live mussel.

한국산 감귤 수입 예상국의 수입 검역제도에 관한 연구

김택조,강영길,권오균 濟州大學校 亞熱帶農業硏究所 1995 亞熱帶農業硏究 Vol.12 No.-

수출밀감 생산지와 밀감 수출관련기관에 유용한 정보를 제공하고자 제주산 온주밀감 주요수입국 및 수입가능국의 검역제도를 조사분석한 결과를 요약하면 다음과 같다. 1. 조사대상국의 연간 수입량은 캐나다 61.5천톤, 미국 101.1천톤, 일본 1.2천톤, 홍콩 32.3천톤 정도이었고 1993년 한국산 감귤 수입량은 캐나다 1107톤, 홍콩 6톤, 러시아가 150톤이었다. 2. 캐나다는 병충해 위험도 평가를 실시한 후 한국산 밀감을 식물위생증이나 수입허가서 없이 수입하고 있다. 수입검사 중 캐나다에 분포하는 병해충으로서 감염정도가 심하지 않은 식물류는 소독처리하고 캐나다에 분포하지 않은 병해충이나 분포하는 병해충이라도 감염이 심한 경우 폐기 (반송)된다. 한국산 밀감의 경우 부패과를 제외하고는 검역상 문제가 되지 않고 있다. 3. 미국은 수입허가제를 채택하고 있으며 한국산 밀감은 궤양병, 흑반병, 화살깍지벌레의 미국내 유입을 막기위하여 수입이 금지되고 있으나 궤양병 무병 생산단지 및 완충지대 설정, 과실의 예방적 소독처리, 박테리아제 테스트 실시, 선과 후 안전조치등을 조건으로 미국내 수입이 한미간 합의 되었다. 과실의 채소류의 반입항에서 수입물량의 약 2%의 임의 표본 추출하여 검사하며, 미국에 분포하는 병해충만이 검출되는 경우에는 수입이 가능한 반면 검역대상 병해충이 발견될 때 소독방법이 있을 경우에는 소독하고 소독방법이 없을 경우에는 폐기 또는 수입이 거부된다. 4. 일본은 14종의 금지병해충의 기주식물 및 식물성 생산물의 수입을 금지하고 있으나 한국산은 수입금지품에 해당되는 식물이 없다. 금지병해충 (14종)과 특정 중요병해충 (42종)이 부착된 식물중 효과적인 소독방법이 확립되어 있지 않은 과실은 폐기되고 소독가능 병해충이 발견된 과실류는 소독되거나 선별된다. 5. 홍콩에서의 수입 비제한 품목인 과실 및 채소류는 식물위생증이나 수입허가서 없이 수입되며 수입검사중 병해충이 발견되면 소독처리된다. 6. 러시아에서는 수입비제한 품목을 제외하고는 식물 및 식물성 산물의 수입시 식물위생증과 수입허가서가 요구되며 허가항을 통하여 수입되어져야 한다. 7. 감귤류가 재배되지 않아 수입검역이 까다롭지 않은 캐나다, 홍콩, 러시아의 동부에 한국산 밀감 수출 증대를 도모하는 것이 바람직하다. This study was conducted to obtain knowledge of import quarantine system in Canada, the U.S.A., Japan, Hongkong and Russia, which may facilitate export Korean mandarins to these countries. The results are summarized as follows : 1. Canada, the U.S.A., Japan, Hongkong annually import about 61,500, 101,100, 1,200 and 32,300 tons. respectively, of such citrus fruits as mandarins, tangerines and clementines. In 1993, 1,107 tons of Korean mandarins were imported into Canada, 6 tones into Hongkong and 150 tones into Russia. 2. After pest risk on Korea mandarins for Canada was assessed, the mandarins have been imported into Canada without phytosanitary certificate and import permit. When either diseases and/or pests which have occurred in Canada are found or they are not severe during import inspection, disinfection is ordered. When either diseases and/or pests which have never occurred in the country are found or they are severe, the importer is ordered to destroy or reship the shipment. In Canada, import quarantine for Korean mandarins has been smooth except the rotten fruits have been found. 3. The import of Korean mandarins into the U.S.A. is prohibited to prevent citrus caker, phoma rot and arrowhead scale from being introduced into the U.S.A. However, it has been agreed between Korea and the U.S.A. that there can be imports into the U.S.A. of mandarins from Chejudo based on implementation of certain procedures. At the ports of entry, inspections are conducted by sampling about 2% of the imported amount of fruits and vegetabls. When injurious diseases and/or pests are found, disinfection is ordered. When there is no methods of disinfection which can completely kill the diseases and/or pests, the importer is ordered to destroy or reship the shipment. 4. Prohibited are host plants and plant products of 14 kinds of diseases and pests that have never occurred in Japan. In import inspection, when diseases and/or pests are found, disinfection is ordered. When there is no methods of disinfection which can completely kill the diseases and/or pests. the importer is ordered to destroy or reship the shipment. 5. Fresh fruits and vegetable can be imported into Hongkong without phytosanitary certificate and import permit. When diseases and/or pests are found during import inspection, disinfection is ordered. 6. Phytosanitary certificate permit are required in Russia for import of plants and plant products from foreign countries. The port of entry is designated by the quarantine authorities. It seems to be desirable to try hard to increase export amount of Korean mandarins to Canada, eastern Russia and Hongkong which do not raise citrus fruits and are not strict for import quarantine of citrus fruits.

팔당호의 부영양화 실태

김범철,김동섭,권오길 江原大學校 附設 環境硏究所 1990 環境硏究 Vol.7 No.-

Trophic states were surveyed in a reservoir on the Han River, Lake Paldang, receiving waters from two rivers, the North Han River and South Han River. Chlorophyll a concentration, secchi disc transparency, BOD, soluble reactive phosphorus (SRP) concentration and total phosphorus (TP) concentration were investigated at three sta-tions (dam site and the inlet region of the North Han River and the inlet region of the South Han River) and the phosphorus loading into Lake Paldang was measured. Chlorophylla, BOD, SRP and TP were highest at the inlet region of the South Han River and lowest at the inlet region of the North Han River and eutrophic level at the inlet region of the South Han River. The phosphorus loading into Lake Paldang was between the dangerous critical loading and the permissible critical loading of Vollenweider-OECD critical loading model. The phosphorus loading of the South Han River was about 2 times larger than of the North Han River.

홍천강 상류에 서식하는 묵납자루, Acheilognathus signifer의 성 성숙과 산란시기

백현민,송호복,권오길 한국어류학회 2003 韓國魚類學會誌 Vol.15 No.4

묵납자루, Acheilognathus signifer의 성적성숙과 산란시기를 연구하기 위하여 2002년 3월부터 동년 10월까지 북한강 수계의 홍천강 상류인 내촌천에서 조사, 연구하였다. 생식소성숙도지수(GSI)는 4월에 암컷(GSK = 6.95±0.83)과 수컷(GSI = 2.84±0.55) 모두 최대치로 나타났고, 암컷은 8월(GSI = 2.02±0.91), 수컷은 9월에(GSI = 0.54±0.50)최저치를 보였으며, 10월부터 GSI가 상승하였다. 산란관길이 지수(OI)는 5월에 최대로 신장(26.53±8.34%)되었으며, 8월에 가장 축소(5.77±1.37%)되었다. 암컷은 체장 45㎜ 이상, 수컷은 체장 40㎜이상부터 생식 활동이 가능 할 것으로 추정되었다. 암컷과 수컷에서 산란에 참여 비율이 높은 연령군은 2년생이었으며, 수컷은 암컷보다 3년생의 참여 비율이 높았다. 생식 주기는 3~4월의 성숙기 5~6월의 완숙 및 산란기, 7~8월의 퇴화 및 휴지기, 9~10월의 성장기로 구분되었다. 포란수는 141~314(평균 225)개였으며, 성비에서 암컷이 수컷보다 우세하게 나타나 암수의 성비가 1:1이 아니었고, 암수의 성비는 유의한 차이를 보였다(c^(2) = 13.5, P<0.05). 본 종의 산란 성기는 GSI가 높은 값을 나타내고, 산란관이 최대로 신장되며, 난소와 정소가 최대로 성숙하는 5월로 추정되었다. The Korean bitterling, Acheilognathus signifer, collected in the Naechoncheon, Hongchungun, Kangwon-do, Korea, from March to October 2002, were examined for sexual maturation and spawning season. Gonadosomatic index (GSI) and ovipositor indices (OI) values reached the maximum in May. The body length at sexual maturity was estimated at 45 ㎜ for the females and 40 ㎜ for the males. Reproductive cycle can be classified into the growing stage (September to October), mature stage (March to April), ripe and spent stage (May to June), and degenerative and resting stage (July to August), Two-year-old populations were the highest participants in spawning. Fecundity of A. signifer ranged from about 141-314 (average 225) eggs. The sex ratio of fema1e : male was not significantly different from 1 : 1 (χ² = 13.5, P< 0.05).

홍천강 상류에 서식하는 묵납자루, Acheilognathus signifer의 연령과 성장

백현민,송호복,권오길 한국어류학회 2002 韓國魚類學會誌 Vol.14 No.4

강원도 홍천구의 홍천강 지류인 내촌천에 서식하는 A. signifer 개체군의 연령과 성장 연구를 위하여 2002년 3월부터 9월까지 채집한 표본으로부터 채린하여 연령을 사정하고, 윤경으로부터 체장을 역계산하여 본 종의 성장을 추정하였다. 체장과 체중의 관계는 암컷은 W = 4.10 × 10^-6L^3.44 수컷은 W = 7.48 × 10^-6L^3.29 (r^2 = 0.98, n = 110)으로 나타났다. 역계산에 의한 윤문형성시의 체장은 암컷은 L_0.5 = 29.65±1.62 ㎜, L_1.5 = 36.78±2.33 ㎜, L_2.5=44.27±0.98 ㎜, L_3.5 = 48.87 ㎜, 수컷은 L_0.5 = 34.04±1.89 ㎜, L_1.5=43.34±1.80 ㎜, L_2.5 = 51.32±2.35 ㎜, L_3.5 = 56.92 ㎜이었고, von Bertalanffy 성장식은 암컷은 L_t = 73.56[1-e^0.1771(t+2.41)], 수컷은 L_t = 78.87[1-e^0.2325(t+1.93)]으로 추정되었다. 체장과 체중의 관계식에 의한 나이에 따른 체중의 성장식은 암컷은 W_t = 10.73[1-e^-0.1771(t+1.70)]^3.44, 수컷은 W_t = 12.22[1-e^-0.2325(t+1.24)]^3.29이었다. A. signifer는 초기(1세)에 성장이 빠르고, 그 이후에는 성장률이 급격히 둔화되어 연령간의 체장 차이가 적었다. Age and growth of Korean bitterling, Acheilognathus signifer, collected from March to September 2002 in the Naechoncheon, Hongchun-gun, Kangwon-do, Korea, were determined by examination of scale annuli The length-weight regression was W = 4.10 × 10^-6L^3.44 (r^2 = 0.97, n = 270) for the females and W = 7.48 × 10^-6L^3.29 (r^2 = 0.98, n = 110) for the males. The back-calculated body lengths for each age are: L_0.5 = 29.65±1.62 ㎜, L_1.5 = 36.78±2.33 ㎜, L_2.5=44.27±0.98 ㎜, L_3.5 = 48.87 ㎜ for the females and L_0.5 = 34.04±1.89 ㎜, L_1.5=43.34±1.80 ㎜, L_2.5 = 51.32±2.35 ㎜, L_3.5 = 56.92 ㎜ for the males. The von Bertalanffy growth curves were expressed as L_t = 73.56[1-e^0.1771(t+2.41)] for the females and L_t = 78.87[1-e^0.2325(t+1.93)] for the males. Growth in body weight was expressed as W_t = 10.73[1-e^-0.1771(t+1.70)]^3.44 for the females and W_t = 12.22[1-e^-0.2325(t+1.24)]^3.29 for the males. A. signifer showed the high growth rate in the first year.