http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
동해에 서식하는 대게류(Chionoecetes spp.)의 재생산 및 분포 특성
차형기 ( Hyung Kee Cha ),양재형 ( Jae Hyeong Yang ),이성일 ( Sung Il Lee ),윤상철 ( Sang Chul Yoon ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.5
Two Chionoecetes crabs, C. opilio and C. japonicus are primary targets of trap fisheries in the East Sea. To promote the sustainable management of these species, we investigated their reproductive biology and spatial distribution based on samples collected in standardized traps in the coastal waters of eastern Korea from September 2007 to August 2008. The estimated spawning season of C. opilio was March- April, whereas that of C. japonicus continued year-round. The estimated molting period of both species was September- October. Fecundity of C. opilio was pro-portional to female, size, ranging from 44,791 to 151,538 eggs, and the estimated body size at 50% sexual maturity was 63.9 mm carapace width. Egg bearing female C. opilio were mostly collected depths of 200-300 m, particularly off Hupo and Chuksan, suggesting that these areas are their major spawning grounds. In contrast, female C. japonicus were mostly collected at depths of 400-600 m, peaking at 600 m. The species-specific catch rate was higher for C. opilio above 400 m, similar at ca. 450 m, and higher for C. japonicus below 500 m. These vertical differences indi-cate apparent spatial segregation of the species, suggesting that spatially-explicit fisheries management plans may be necessary for mitigating conflicts between the respective crab fisheries and maintaining these crabs.
모의실험을 통한 동남해안 대구 (Gadus macrocephalus)의 가입당 생산 분석
차형기 ( Hyung Kee Cha ),정석근 ( Suk Geun Jung ) 한국수산과학회(구 한국수산학회) 2012 한국수산과학회지 Vol.45 No.5
We derived biological reference points for Pacific cod Gadus macrocephalus in southeastern Korean waters by applying a yield-per-recruit analysis based on a daily simulation that adopted size-dependent fecundity, growth, and natural mortality functions, This showed that the yield per recruit of Pacific cod can be maximized at an instantaneous rate of fishing mortality (F)=0.37 yr` under the current regulations, where the minimum catch size (L)30 cm in total length (TL), The maximum economic yield was estimated to be attained at L=35-45 cm TL, if F>1 yr` but at Le=z3540 cm TL, if F<l yr`. Despite great uncertainty in the stock assessment, to develop fisheries management plans for the sustainable exploitation of Pacific cod in southeastern Korean waters, it is necessary to estimate F using capture-recapture or other expedient methods.
한국 남해에 서식하는 갯장어, Muraenesox cinereus (Forsskal)의 생식생태
차형기 ( Hyung Kee Cha ),서영일 ( Young Il Seo ),오택윤 ( Taeg Yun Oh ),김희용 ( Hee Yong Kim ),이선길 ( Sun Gil Lee ),최문성 ( Mun Sung Choi ) 한국어업기술학회 2012 수산해양기술연구 Vol.48 No.3
Reproductive ecology of the sharp toothed eel, Muraenesox cinereus was investigated based on the samples captured in southern Korean waters from January 2010 to December 2011. Gonadosomatic index began to increase in April, and reached maximum between July to August. After spawning it began to decrease from October. Reproductive season was estimated to April-September, with peak in July. Fecundity was proportional to the size of the female, with the clutch size varying from 56,000 eggs in the smallest female anal length, 27.0cm) to 1,400,000 eggs in the largest (anal length, 49.5cm). Size at 50% sexual maturity AL50), determined from mature females, were 21.9cm. Annual reproductive cycles of this species could be divided into four successive stages; immature stage (October-February), maturing stage (March-May), mature stage (June-August) and spent stage (August-October).
한국 남해에 서식하는 물가자미, Eopsetta grigorjewi (Herzenstein)의 재생산 연구
차형기 ( Hyung Kee Cha ),강수경 ( Su Kyung Kang ),최정화 ( Jung Hwa Choi ),오택윤 ( Taeg Yun Oh ),서영일 ( Young Il Seo ) 한국어업기술학회 2011 수산해양기술연구 Vol.47 No.3
Maturation and spawning of the Shotted halibut, Eopsetta grigorjewi was investigated based on the samples captured in South Korean waters from January 2008 to December 2009. Gonadosomatic index began to increase in December, and reached maximum between January to March. After spawning it began to decrease from May. Reproductive season was estimated to January-April, with peak in February. Fecundity was proportional to the size of the female, with the clutch size varying from 170,000 eggs in the smallest female (total length, 28.9cm) to 1,300,000 eggs in the largest (total length, 41.5cm). Size at 50% sexual maturity (TL50), determined from mature females, was 28.8cm. Annual reproductive cycles of this species could be divided into six successive stages; immature stage (May-October), nucleolus stage (November- January), yolk vesicle stage (January-February), vitellogenic and ripe stage (January-April) and spent stage (April-May).
동해안 기름가자미 Glyptocephalus stelleri (Schmidt)의 성숙과 산란
차형기 ( Hyung Kee Cha ),권혁찬 ( Hyeok Chan Kwon ),이성일 ( Sung Il Lee ),양재형 ( Jae Hyeong Yang ),장대수 ( Dae Soo Chang ),전영열 ( Young Yull Chun ) 한국어류학회 2008 韓國魚類學會誌 Vol.20 No.4
본 연구는 우리나라 동해안에 서식하는 기름가자미(Glyptocephalus stelleri)의 성숙과 산란에 관한 연구로, 2005년 5월부터 2008년 9월까지 동해구기선저인망어업에 의해 어획된 시료를 구입하여 조사를 수행하였다. 암컷의 GSI 값은 12월부터 증가하기 시작하여 3~5월에 높은 값을 보였고, 6월 이후 감소하기 시작하였으며, 수컷도 암컷과 유사한 경향을 보였다. 따라서 생식소 발달과정 및 생식소 숙도지수의 월 변화로부터 기름가자미의 산란기는 3~6월, 주 산란기는 4~5월인 것으로 추정되었다. 난소의 생식주기는 미숙기(7~11월), 중숙기(12~2월), 완숙기(3~4월), 휴지기(5~6월)로 구분되었다. 포란수는 최소 15,146개(TL 24.1 cm)에서 최대 101,491개(TL 38.1 cm)로 계수되었고, 전장(TL)과 포란수(F)와의 관계식은 F=0.0004TL3.449 (R2=0.663)으로, 체장이 커질수록 포란수가 증가하는 경향을 나타내었다. 산란에 참여하는 암컷의 성숙체장은 25.6 cm로 추정되었다. The maturity and spawning of Korean flounder Glyptocephalus stelleri were investigated using samples randomly collected in the East Sea of Korea from May 2005 to September 2008. Gonadosomatic index began to increase in December and reached a maximum between March and May. After spawning it began to decrease from June. The spawning period was March to June, and the main spawning period was April to May. Annual reproductive cycles of this species can be divided into four successive stages; immature stage (July~November), maturing stage (December~February), mature stage (March~April) and spent stage (May~June). The fecundity ranged from 15,146 eggs at 24.1 cm (TL) to 101,491 eggs at 38.1 cm (TL). The relationship between total length (TL) and fecundity (F) can be expressed as F=0.0004TL3.449 (R2=0.663), with F increasing with TL. The TL at 50% group maturity (TL50%) was estimated to be 25.6 cm.
제주연안 육상양식장 밀집지역 주변해역의 영양염 과잉 요인
고혁준,박성은,차형기,장대수,구준호,Koh, Hyuk-Joon,Park, Sung-Eun,Cha, Hyung-Kee,Chang, Dae-Soo,Koo, Jun-Ho 해양환경안전학회 2013 해양환경안전학회지 Vol.19 No.4
제주연안선 부근에 밀집된 육상양식장 배출구 주변 4개 해역(애월리, 행원리, 표선리, 일과리)에서 수질환경의 시공간적 변화에 영향을 미치는 요인을 파악하기 위해 2010년 2월부터 2011년 12월까지 격월로 총 12회 조사하였다. 주성분 분석 결과 조사해역에서 연중 영양염의 분포는 염분과의 관련성 없이 배출구로부터 공급되는 물질에 의해 영양염의 농도가 조절되어, 연안에서 외해역으로 갈수록 농도구배가 감소하는 특징을 나타냈다. 특히 용존무기질소의 경우는 배출구와 인접한 해역에서는 부영양상태로 인에 비해 질소가 과잉되고 있었다. 유기물의 분포는 담수유입량이 증가하는 고수온기에 증가하는 경향을 보였다. 식물플랑크톤의 생물량 변화는 애월 및 행원해역은 담수유입과 관련된 기상요인(기온 및 강우), 표선 및 일과는 영양염의 인위적 공급요인(양식장 배출수)에 의한 영향을 주로 받는 것으로 나타났다. 특히, 배출구로부터 직선거리 약 300 m 및 수심 10 m이내 해역의 표 저층에서는 고영양염 농도 분포가 지속되고 있어, 부영양화 과정에서 발생하는 문제를 직 간접적으로 받을 수 있는 가능성을 나타냈다. 육상양식장의 운영 시 취수지점이 배출수의 영향을 받는 지점에 위치할 경우 사육수질의 문제가 발생할 수 있다. This study investigated the temporal-spatial distribution and variations in water quality parameters (temperature, salinity, pH, DO, COD, SPM, DIN, DIP, silicate, TN, TP, and chlorophyll-a) in the coastal area of Jeju, Korea, adjacent to aquaculture ponds (Aewol-ri, Haengwon-ri, Pyosun-ri, and Ilkwa-ri). Data were collected bimonthly from February 2010 to December 2011. A principal component analysis (PCA) identified three major factors controlling variations in water quality during the sampling period. Aquaculture effluent water led to large changes in nutrient levels. The highest nutrient values were observed during the investigation period. The relatively large increase in organic matter at the sampling stations coupled with sea area runoff events during the summer rainy period. Variation in chlorophyll-a concentration was mainly driven by meteorological factors such as air temperature and rainfall in the coastal areas of Aewol and Haengwon. In the coastal areas of Pyosun and Ilkwa, pollution was caused by anthropogenic factors such as discharge of aquaculture effluent water. High nutrient concentrations at the majority of the coastal stations indicate eutrophication of coastal waters, especially within a distance of 300 m and depth of 10m from drainage channels. Coastal eutrophication driven by aquaculture effluent may be harmful inshore. Events such as eutrophication may potentially influence water pollution in aquaculture ponds when seawater intake is detected because of aquaculture effluent water.
한국 남해에 출현하는 먹장어 Eptatretus burgeri의 재생산 특성
김두남,황강석,차형기,박준수,김정년,문성용,이정훈,KIM, Doo-Nam,HWANG, Kang-Seok,CHA, Hyung-Kee,PARK, Jun-Su,KIM, Jung-Nyun,MOON, Seong-Yong,LEE, Jeong-Hoon 한국수산해양기술학회 2018 수산해양기술연구 Vol.54 No.2
The reproduction characteristics of hagfish Eptatretus burgeri were examined using individuals caught in the South Sea of Korea. The spawning season and size at minimum sexual maturity of this species were characterized based on a gonad-somatic index (GSI) and monthly variation egg size (long axis). From monthly variation of GSI, the spawning season was estimated to be from August to September. Developing eggs larger than 10 mm were found in March, and the largest egg size was found in July. The first spawning length was 34.2 cm TL. Batch fecundity ranged from 13 to 117 eggs for hagfish sized from 34.2 cm TL to 77.0 cm TL, respectively, and increased linearly with total length.