사육환경과 먹이종류에 따른 개량조개, Mactra chinensis 유생의 성장과 생존

민병희,신효진,Min, Byeong-Hee,Shin, Hyo-Jin 한국패류학회 2010 The Korean Journal of Malacology Vol.26 No.4

개량조개의 인공종묘생산을 위한 유생사육의 최적 사육환경과 먹이생물의 종류에 따른 유생의 성장 및 생존을 조사하였다. 수온에 따른 유생의 성장은 $18^{\circ}C$에서 $33^{\circ}C$까지 수온이 높을수록 빨랐으며, $23^{\circ}C$ 이상에서는 사육 14일째 $230{\mu}m$ 이상 성장하였으나 $18^{\circ}C$에서는 $151.1{\mu}m$로 성장이 부진하였다. 염분별 유생사육 시 염분 30 psu에서 일간 성장은 $11.3{\mu}m$로 가장 빨랐고, 생존율도 65.8%로 가장 높았다. 개량조개 유생은 사육수 1 ml 당 10개체 이하의 밀도에서는 성장과 생존율이 양호하였으나 20개체 이상에서는 다소 성장이 늦어 유생의 사육밀도는 1 ml 당 10개체 이하가 가장 효과적이었다. 개량조개 유생의 빠른 성장과 생존율을 높일 수 있는 유생사육 최적 조건은 수온 $23^{\circ}C$, 염분 30-35 psu, 유생 수용밀도 1-10 개체/ml이었다. 유생사육 시 먹이생물은 미세조류 4종 [Isochrysis galbana, Pavlova lutheri, Isochrysis sp. (green), Chlorella ellipsoidea] 을 혼합 공급한 실험구에서 빠른 성장과 생존율을 높일 수 있으며, 먹이생물을 단일종만을 공급시 I. galbana와 Isochrysis sp. (green) 실험구에서 빠른 성장과 생존율을 높일 수 있었다. 따라서 개량조개 유생의 적정먹이는 I. galbana와 Isochrysis sp. (green)를 포함한 2종 이상을 혼합 공급하는 것이 적합할 것으로 판단된다. Rearing condition and species of microalgae on growth and survival of the sunray surf clam, Mactra chinensis larvae were investigated for artificial seedling production. The larvae of M. chinensis on higher temperature showed high growth and low survival and was grown over $230{\mu}m$ in shell length 14 days after hatching, but low growth as $151.1{\mu}m$ at $18^{\circ}C$. The larvae of M. chinensis on salinity showed highest daily growth and survival as $11.3{\mu}m$ and 65.8% at 30 psu, respectively. The optimum of water temperature and salinity for the larval rearing were $23^{\circ}C$ and 30-35 psu over 25 psu at least. The density of larval rearing was below 10 per 1 ml in rearing seawater for elevating the development rate from D-shaped to settled (metamorphosing) stage. The larvae fed the mixed diet of Isochrysis galbana, Pavlova lutheri, Isochrysis sp. (green), Chlorella ellipsoidea showed highest growth and survival. The larvae fed the single diet of I. galbana, Isochrysis sp. (green) showed high growth and survival. But the larvae fed the single diet of P. lutheri and C. ellipsoidea showed low growth and survival. The optimum diet of larvae of M. chinensis was over two species of microalgae included I. galbana, Isochrysis sp. (green) for elevating the high growth and survival.

개량조개, Mactra chinensis의 난발생에 미치는 수온, 염분 및 수용밀도의 영향

민병희,김태진,Min, Byeong-Hee,Kim, Tae-Jin 한국패류학회 2010 The Korean Journal of Malacology Vol.26 No.4

개량조개의 종묘생산을 위한 생물학적 기초자료를 얻고자 난발생에 영향을 미치는 수온, 염분 및 수용밀도에 관하여 실험한 결과, 수온에 따른 난발생의 각 단계에 이르기까지의 수온 (TW, $^{\circ}C$)에 따른 발생속도 (h, 시간)는 $18^{\circ}C$, $23^{\circ}C$, $28^{\circ}C$ 및 $33^{\circ}C$에서 D형 유생까지 각각 33시간 30분, 20시간 40분, 18시간 15분 및 15시간이 소요되어 수온이 높을수록 빨랐으며, 그 관계식은 다음과 같다. 2세포기 : 1/h = 0.1051WT - 1.4782 ($r^2=0.9926$) 8세포기 : 1/h = 0.037WT - 0.3686 ($r^2=0.9648$) 낭배기 : 1/h = 0.008WT - 0.0521 ($r^2=0.9134$) 담륜자 : 1/h = 0.0041WT - 0.0235 ($r^2=0.9072$) D형유생 : 1/h = 0.0024WT - 0.0102 ($r^2=0.9611$) 개량조개의 수온과 난발생 속도와의 관계에서 추정된 난발생의 생물학적 영도는 평균 $8.0^{\circ}C$였으며, 개량조개 수정란은 D형 유생까지의 발생률을 고려할 때 발생 가능한 수온은 $18-28^{\circ}C$, 적정 수온은 $23^{\circ}C$였다. 개량조개의 수정란이 D형 유생으로 발생 가능한 염분은 20-35 psu로 나타났고, 염분에 따른 수정란의 D형 유생까지 발생률을 고려할 때 최소 25 psu 이상이며 적정 염분은 30-35 psu였다. 수정란으로부터 D형 유생까지의 발생률을 높일 수 있는 수정란의 수용밀도는 사육수 1 ml 당 40개 이하로 나타났다. Water temperature, salinity and density on egg development of the sunray surf clam, Mactra chinensis were investigated for artificial seedling production. The required time from fertilization to D-shaped larvae were 33.8 hours in $18^{\circ}C$, 20.6 hours in $23^{\circ}C$, 18.2 hours in $28^{\circ}C$ and 15.0 hours in $33^{\circ}C$. The development duration was reduced with increasing temperature. The relationships between temperature and the required time from egg to each developmental stage were described as follows: 2-cell, 1/h = 0.1051WT - 1.4782; 8-cell, 1/h = 0.037WT - 0.3686; gastrula, 1/h = 0.008WT - 0.0521; trochophore, 1/h = 0.0041WT - 0.0235; D-shaped larva, 1/h = 0.0024WT - 0.0102. Biological minimum temperature for the egg development was estimated to be $8.0^{\circ}C$ in average. The possible range of temperature for the development of D-shaped larvae was $18-28^{\circ}C$ and optimum of water temperature for the development of egg was $23^{\circ}C$. The possible range of salinity for the development of D-shaped larvae was 20-35 psu and optimum of salinity for the development of egg was 30-35 psu over 25 psu at least. The density of fertilized egg was below 40 per 1 ml in rearing seawater for elevating the development rate from fertilized egg to D-shaped larva.

조선시대 간의대 천문관측기기 개발자

민병희,이민수,최고은,이기원,MIHN, BYEONG-HEE,LEE, MIN SOO,CHOI, GOEUN,LEE, KI-WON 한국천문학회 2016 天文學論叢 Vol.31 No.3

We study the manufacturers of the astronomical instruments invented as part of the so-called Ganui-Dae (astronomical platform) project in the reign of King Sejong (1418-1450) of the Joseon dynasty. The main purpose of this project was to compile the Chiljeongsan-Naepyeon, a Korean calendar, that lasted for 5.5 years from 1432 to 1438. Through this project, a total of 17 astronomical instruments such as the armillary sphere, celestial globe, and auto-striking clepsydra were developed. It is generally known that most of them were manufactured by Lee Cheon (李?, 1376-1451) and Jang Yeong-Sil (蔣英實, fl. 1423-1442). In this study, we investigate the accounts of the Veritable Records of King Sejong, Munjong, and Sejo, focusing on the inscription written out to memorize the completion of the Ganui-Dae project. We found that at least 12 persons took part in manufacturing the astronomical instruments of the Ganui-Dae project. Lee Cheon was involved in the production of four instruments, while Jang Yeong-Sil was involved in two; therefore, it seems that the achievement of Jang Yeong-Sil was overestimated. We also found that Jeong Cho (鄭招, ?-1434) was a scientist and Lee Cheon was an engineer in the early phase of the Ganui-Dae project, while King Sejong and Yi Sun-Ji (李純之, 1406-1465) played major role in the late phase. According to our study, King Sejong and Yi Sun-Ji were involved in the production of at least seven and five instruments, respectively. In conclusion, we believe that this study will be helpful to understand the practical manufacturers of the astronomical instruments invented during the Ganui-Dae project in the Joseon dynasty.

기수산 요각류 Paracyclopina nana의 배양을 위한 최적 미세조류의 선별

민병희 ( Byeong Hee Min ),박흠기 ( Heum Gi Park ),이균우 ( Kyun Woo Lee ),허성범 ( Sung Bum Hur ) 한국수산과학회 2007 한국수산과학회지 Vol.40 No.1

미세조류의 종류와 농도에 따른 기수산 cyclopoid 요각류 Paracyclopina nana의 섭식

민병희(Byeong-Hee Min),박흠기(Heum-Gi Park),허성범(Sung Bum Hur) 한국수산과학회 양식분과 2006 韓國養殖學會誌 Vol.19 No.4

조선 천체위치측정기기의 구조 혁신 - 소간의, 일성정시의, 적도경위의를 중심으로 -

김상혁,민병희,이민수,이용삼,Kim, Sang-Hyuk,Mihn, Byeong-Hee,Lee, Min-Soo,Lee, Yong-Sam 한국천문학회 2012 天文學論叢 Vol.27 No.3

The Ganui (簡儀, simplified armillary sphere) is a representative of astronomical instruments in Joseon Dynasty of Korea, as well as Yuan Dynasty and Ming Dynasty of China. In early 15th century, Joseon's scientists and engineers uniquely developed the Soganui (小簡儀, small simplified armillary sphere) and the Ilseongjeongsiui (日星定時儀, sun-and-star time determining instrument) from the structural characteristic of Ganui. These two astronomical instruments had a new design by the miniaturization and felt convinced a similar performance of Ganui in the harmony with Korean Astronomy and Astrology Cultures. Since mid-18th century after the enforcement of shixian-li (時憲曆), the Soganui and Ilseongjeongsiui handed over the Jeokdogyeongwiui (赤道經緯儀, equatorial armilla) by a change of the observational framework such as the time and angle measures. The Jeokdogyeongwiui made by Gwansanggam (觀象監, Bureau of Astronomy in Joseon Dynasty) adopted the new observational framework. We studied the structural characteristics and scientific values of these 3 astronomical instruments with theirs observation methods.

사료내 다시마(Laminaria japonica) 첨가에 따른 감성돔(Acanthopagrus schlegeli)의 성장, 체조성 및 혈액성상에 미치는 영향

조성환 ( Sung Hwoan Cho ),민병희 ( Byeong Hee Min ),이진영 ( Jin Young Lee ),이상윤 ( Sang Yoon Lee ),김하나 ( Ha Na Kim ),안신홍 ( Shin Hong An ),나경석 ( Kyoung Suk Na ),김동수 ( Dong Soo Kim ) 한국수산과학회 2013 한국수산과학회지 Vol.46 No.5

This study was performed to determine effects of dietary inclusion of various concentrations and sources of sea tangle Laminaria japonica on growth, body composition and plasma chemistry of juvenile black porgy Acanthopagrus schlegeli. Juvenile fish (N=810; average mass=8.9 g) were distributed among twenty-seven 200 L flow-through tanks (30 fish per tank). Nine experimental diets were prepared: control (Con) without additives; sea tangle powder at 0.1%,0.5%, 1%, 2%, 3% and 5%, (P-0.1, P-0.5, P-1, P-3 and P-5 diets, respectively); and fresh sea tangle (F-1); and 1% sea tangle extract (E-1). Each powdered additive was substituted for an eqaul amount of wheat flour, and the extract was substituted for an equal amount of water in the respective experiemtnal diets. Each diet was fed to triplicate groups of fish. Weight gain and feed conversion ratio were not affected by the experimental diets. Feed consumption by fish fed the P-1 diet was higher than that of fish fed the P-3 and P-5 diets. Moisture, crude protein, crude lipid, whole-body ash content (excluding the liver), liver moisture, and crude protein and lipid contents of fish were not affected by the experimental diets. None of the fish plasma criteria were affected by the experimental diets, with the exception of plasma glucose. In conclusion, dietary inclusion of various concentrations and sources of sea tangle did not significantly affect the growth, feed efficiency, body composition or plasma chemistry of juvenile black porgy.

진해만 피조개 Scapharca broughtonii 양식장 식물플랑크톤의 종조성과 현존량의 월별변화

김병학(Byoung-Hak Kim),민병희(Byeong-Hee Min),최낙중(Nak-Joong Choi),오봉세(Bong-Se Oh),박기열(Ki-Yeol Park),민광식(Kwang-Sik Min) 한국수산과학회 양식분과 2008 韓國養殖學會誌 Vol.21 No.3