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피조개, Scapharca broughtonii (Schrenck) 정자의 동결보존
라성주,한경호,최명락,고강희,Rha, Sung-Ju,Han, Kyeong-Ho,Choi, Myeong-Rak,Kho, Kang-Hee 한국패류학회 2010 The Korean Journal of Malacology Vol.26 No.4
피조개, Scapharca broughtonii (Schrenck) 정자의 동결보존 위해 동결높이에 따른 예비동결 (0, 2, 4, 6 cm), 희석제 (150 mM NaCl, 300 mM glucose, Ringer's solution)와 동해방지제(glycerol, dimethylsulfoxide (DMSO), dimethylacetamide (DMA), methaol) 에 따른 효과를 정자의 운동성과 생존율로 비교하였다. 피조개 정자 동결보존에 있어 예비동결은 액체질소표면으로부터 2 cm가 가장 효과적이었으며, 희석제로는 Ringer's solution이 동해방지제로는 DMSO 10% 농도가 가장 적합하였다. This study was conducted to investigate protocol standardization for spermatozoa cryopreservation of the Scapharca broughtonii (Schrenck). Among the freezing rates, freezing at a height of 2 cm above liquid nitrogen surface for 5 minute gave higher activity and survival rate. Among the various diluents, Ringer's solution was the best for S. broughtonii sperm cryopreservation. The suitability of cryoprotectants dimethylsulfoxide (DMSO), dimethylacetamide (DMA), glycerol and methanol were tested against three freezing rates. DMSO gave significantly higher activity and survival rates than others.
라성주(Sung Ju RHA),박일웅(Il Woong PARK),김윤설(Yoon Seol KIM),이성훈(Sung Hun LEE),황재호(Jae Ho HWANG),윤호섭(Ho Sub YOON),김정(Jung KIM Sang),최상덕(Duk CHOI) 전남대학교 수산과학연구소 2009 수산과학연구소논문집 Vol.18 No.1
The macrobenthic faunal community of Muan Bay comprised 34 species and showed the overall mean density of 125.49 inds.m². Ploychaetes were the most important component of the macrofaunal community in species richness and abundance. The dominant species in abundance were a polychaete(Scoloplos armiger(13.8%)) and a mussel(Ruditapes philippinarum(11.80%)). Cluster analysis showed that the benthic community could be classified into three station groups A, B and C. Group A, located from the Aphae Island to Bok-gil pier and has dominant species including bivalves(Ruditapes philippinarum and Musculista senhousia), polychaetes(Glycera chirori and Nephtys caeca). Group C, located at the Topmeori Beach to near Hyogi Island, has dominant species including one echinoderm(Protandyra bidentata), four polychaetes(Scoloplos armiger, Nephtys ciliata, Lepidonotus helotypus and Lumbrineris heteropoda). Group B, between Aphae Island and Hyogi Island, has dominant species including a bivalve Musculista senhousia predominated.
라성주(Sung Ju RHA),이성훈(Sung Hun LEE),황재호(Jae Ho HWANG),윤호섭(Ho Sub YOON),김정(Jung KIM),오명주(Myung Joo OH),최상덕(Sang Duk CHOI) 전남대학교 수산과학연구소 2010 수산과학연구소논문집 Vol.18 No.2
The community structure of macrobenthos was investigated around Myodo Island in Gwangyang-Bay. Macrobenthic animals were collected by using a van Veen grab (0.1m²) from January to August, 2009. The macrobenthic faunal community has 40 species and 151.03inds/m². The dominant species were Ruditapes philippinarum, Didimarca tenebricum, and Mytilas edulis. The diversity index ranged 0-3.539, evenness index was 0.193-1, and richness index was 0-2.474. The highest benthic pollution index was observed at station 7 and 8. All macro-benthic faunas were assigned into a specific functional group according to their ecological responses against the environmental stress.
개불, urechis unicinctus의 생식주기에 따른 아미노산 변화
최상덕(Sang Duk CHOI),김호진(Ho Jin KIM),라성주(Sung Ju RHA),주용석(Yong Seok Ju),정관식(Kwan Sik JEONG),이원교(Won Kyu LEE),신태선(Tae Sun SHIN) 전남대학교 수산과학연구소 2000 수산과학연구소논문집 Vol.9 No.-
In order to evaluate the marine mollusc as foodstuff not only from the biochemical aspect but also from the view point of food science, we have analyzed the protein and amino compositions of the Urechis unicinctus on reproductive cycle. We sampled Urechis unicinctus from January te June, 1999 in Yosu. Urechis unicinctus’s muscle contained about 12.95~16.63% of protein, 0.01~0.47% of fat, 78.93~83.41% of moisture and 2.59~3.48% of ash. The total amino acid compositions change in the muscle of Urechis unicinctus was found to be very similar reproductive cycle of Urechis unicinctus. The major amino acid of Urechis unicinctus’s muscle protein was glutamic acid, glycine, alanine, leucine, and asparactic acid in order.
갯강구, Ligia exotica의 번식생태에 관한 생물학적 기초연구
최상덕(Choi Sang Duk),이영숙(Young Suk Lee),라성주(Sung Ju Rha),윤호섭(Ho Seop Yoon),정형택(Hyung Taik Jung) 전남대학교 수산과학연구소 1999 수산과학연구소논문집 Vol.8 No.-
Ligia exotica was sampled from coast of Yosu, Korea. And it has been reared for 4 months in the laboratory. At copulation of Ligia exotica, adult male rode on female’s back and copulating was continued for 24hr. In copulated female, ventral side from 4th thoracic segment was changed white, fertilized eggs were developed at marsupium after copulating. The period when female possess the eggs is about 30 days and then it was hatched. Newly hatched juvenile was morphologically adult. In copulating, male’s size is higher than that of female, the larger female’s size is, the much more egg’s number is.
꼬막(Tegillarca granosa)의 난 발생 및 유생 발달
김정(Jung KIM),라성주(Sung Ju RHA),한종석(Jong Seok HAN),장선익(Sun Ik JANG),윤지원(Ji Won YUN),황재호(Jae Ho HWANG),오명주(Myung Joo OH) 전남대학교 수산과학연구소 2011 수산과학연구소논문집 Vol.19 No.-
꼬막, Tegillarca granosa의 인공종묘생산 기술개발을 목적으로 생물학적 기초자료를 얻고자 난 발생 및 유생발달에 미치는 환경조건을 조사하였다. 꼬막의 방출된 알은 70㎛의 분리침성란이었고, 난발생의 최적 환경조건은 수온20-30℃, 염분 30-35psu, pH 7-8로 나타났다. 유생의 최적 사육조건은 수온 25-27℃, 밀도 4-6indiv./㎖, 먹이생물 Isochrysis galbana를 혼합하여 급이 하는 것으로 나타났다. 대량 유생사육은 수온 28℃에서 먹이생물 Isochrysis galbana, Tetraselmis suecica, Phaeodactylum sp., Chaetoceros calcitrans를 혼합하여 1-5×104/㎖로 급이하며 사육하여 24일째에 270㎛로 성장하였다. 난과 유생의 발달은 수온 28℃에서 수정 후 상실기유생(6시간), 담륜자유생(10시간), D형유생(20시간, 90㎛), 초기각정기유생(10일, 120㎛), 중기각정기유생(15일, 160㎛), 후기각정기유생(19일, 180㎛), 침착각 정기유생(24일, 270㎛)으로 성장하였다. In order to obtain the basic biological information of artificial seedling production on the ark shell, Tegillarca granosa, the early developmental morphology was investigated on environment and rearing conditions. Eggs of the ark shell were demersal and 60 ㎛ in diameter after spawning. Optimum environment conditions (water temperature, salinity, and pH) of egg development, were ranged 20-30 ℃, 30-35 psu, and 7-8, respectively. As for optimum rearing condition on larvae development, water temperature, stocking density, and food organisms were 25-27℃, 4-6 ind./㎖, and the mixture of phytoplanktons (mainly Isochrysis galbana), respectively. On 24 day after fertilization, the larvae grew up to 270 ㎛ in the shell length (SL) when larvae were fed by mixture of phytoplanktons (Isochrysis galbana, Tetraselmis suecica, Phaeodactylum sp., and Chaetoceros calcitrans) in the concentration of 1-5×104 cells/㎖ at 28℃. At 28 ℃, fertilized eggs were developed to morula, trochophore, D-shaped (90 ㎛ SL), early umbo (120 ㎛ SL), middle umbo (160 ㎛ SL), post umbo (180 ㎛ SL), and immension umbo (270 ㎛ SL) stages at 6 hours, 10 hours, 20 hours, 10 days, 15 days, 18 days, and 24 days, respectively.
살조개, Protothaca jedoensis의 성성숙 유도 및 산란 유발
김정(Jung KIM),라성주(Sung Ju RHA),장선익(Sun Ik JANG),김용구(Yong Gu KIM),윤호섭(Ho Seop YOON),최상덕(Sang Duk CHOI) 전남대학교 수산과학연구소 2010 수산과학연구소논문집 Vol.18 No.2
In order to obtain the basic information for artificial seedling production of venus clam, Prototlzaca jedoensis, gonadal maturation was induced by different temperature, and fertilization and hatching rate were investigated by various stimulating methods for spawning induction. The gonadal maturation induction was evaluated by percentage of follicle and oocyte area on the ovary of the female through the histological observation of gonadal tissue at 18℃ and 22℃. The percentage of follicle area was the maximum value (96.38±1.36%) in 16 May and oocyte area was 74.67±3.67% at 22℃. Serotonin injection stimulus could induce the spawning in venus clam. Water temperature rising, air dry, pulse spawning(gonad incision), sperm suspension solution, UV irradiated seawater, and NH₄OH, H₂O₂addition were not effective. Serotonin injection and temperature rising were responsed 70%, 100%, respectively. The response time to initial spawning in the serotonin injection stimulus(10⁻⁴M) was within 3 minutes on female and 2 minutes on male. The highest fertilization and hatching rate was 95.5%, 87.2%, respectively.