수온과 염분의 변화에 따른 연령별 대복 (Gomphina veneriformis: Bivalvia) 의 여과율 변동

신현출,이정호,정효진,이정식,박정준,김배훈,Shin, Hyun-Chool,Lee, Jung-Ho,Jeong, Hyo-Jin,Lee, Jung-Sick,Park, Jung-Jun,Kim, Bae-Hoon 한국패류학회 2009 The Korean Journal of Malacology Vol.25 No.2

동해안의 유용 이매패류인 대복 (Gomphina veneriformis; Bivalvia)을 대상으로 기초 생리, 생태적 특성을 파악하기 위해 수온과 염분에 따른 대복의 여과율 변동을 측정하였다. 실험에 사용된 먹이생물은 황색편모조강 Isochrysis galbana (KMCC H-002)를 f/2배지를 이용하여 고농도로 단일배양한 후 사용하였다. 여과율 측정은 간접 측정법을 이용하였고, 실험에 사용된 먹이생물은 광학현미경 하에서 혈구계산판을 이용하여 계수하였다. 수온별 대복의 여과율은 2, 3, 4년생 모두 저온에서 수온이 상승할수록 여과율이 급격히 증가하여 $15^{\circ}C$에서 최대로 나타났으며, 이 후 감소하는 동일한 경향을 보였다. 염분별 대복의 여과율은 2, 3, 4년생 모두 30-35 psu의 염분범위에서 최대로 나타났다. 연령별 대복의 여과율은 수온, 염분변화에 관계없이 2년생 대복이 가장 높은 여과율을 기록했고, 4년생 대복의 여과율이 가장 낮았다. 다항회귀분석 결과 수온별 대복의 여과율 곡선은 모든 연령군에서 대체적으로 저온 구간으로 치우친 경향을 나타내었고 온도계수 $Q_{10}$ 값 역시 저온에서 높게 나타나 저온의 영향을 많이 받는 것으로 나타났다. 염분별 여과율 곡선은 모든 연령군에서 대체적으로 고염 구간으로 치우친 경향이 나타나 저염분으로 갈수록 여과율이 감소한다는 것을 알 수 있었다. 본 연구의 결과로 조하대 부유섭식 이매패류인 대복은 비교적 저온에서 서식하며 넓지 않은 온도범위에서 서식하는 협온성생물이며, 좁은 염분범위에서 높은 여과율을 보이는 협염성종임을 확인할 수 있었다. The present study was performed to describe the influence of water temperature and salinity on filtration rates of the venus clam, Gomphina veneriformis, a suspension-feeding (filter-feeding) bivalve species. The calmswere collected from the eastern coastal area of Sokcho, Gangneung and Jumunjin at Kangwon-do, Korea, during December 2006 and May 2007. Isochrysis galbana (KMCC H-002) cells as food organisms were indoor-cultured by f/2 medium, and were used to measure the filtration rate of clam. Filtration rates of clam were measured by indirect method. Cell concentration of food organisms were determined by direct counting cells used the hemacytometer under the light microscope. The filtration rates of clams by water temperature sharply increased with temperatures up to $15^{\circ}C$ as optimum temperature and above this temperature, the filtration rates decreased exponentially. Venus clams showed very low filtration rates at low salinity (10-15 psu) and maximum values at high salinity (30-35 psu). Regardless of water temperature and salt change, 2-year class clams showed high filtration rates, but low in 4-year-class. Polynomial regression curves with water temperature were shifted to the left in low temperature region. Thermal coefficient $Q_{10}$ values showed much higher values at low temperature range than at high temperature range, too. These results indicate that the venus clam is more sensitive in cold water. Polynomial regression curves with salinity were shifted to the right in high saline region. According to this study, the venus clam Gomphina veneriformis, subtidal filter-feeding bivalve, was the stenothermal organism, inhabited mainly in low temperature and the stenohaline, in high saline waters.

경기만 남부 해역의 저서다모류 군집

신현출,강성길,고철환,SHIN, HYUN-CHOOL,KANG, SEONG-GIL,KOH, CHUL-HWAN 한국해양학회 1992 韓國海洋學會誌 Vol.27 No.2

This study was carried out to investigate the benthic polchaete community in the southern area of Kyeonggi Bay, Korea. The species composition was examined in Asan Bay in 1985, the coastal area near Yibug in 1987, the area between Daeranjido and Asan Bay for 1988-1989, and the offshore south of Deogjeogdo in 1992. Polychaetes, the dominant faunal group occupying 57.4% in total density, comprised a total of 124 species with a mean density of 211 indiv.m/SUP -2/. The dominant polychaete was Prionospio sp. (28.8%), followed by Nephtys polybranchia (6.0%), Tharyx sp. (4.8%) Stermaspis scutata (4.4%), Lumbrineris longifolia (3.9%). The Number of species and density were higher in the coastal area near Yibug, Asan Bay and the mouth of Namyang Bay, while lower in the channels of offshore region. The cluster analysis revealed that the study area could be divided into 5 regions, which were distributed serially along the coast from Asan Bay to open sea. Each region sustained its specific Bay, Stermaspis-Heteromastus assemblage from Asan Bay to Daeranjido, Hemipodus assemblage in the channels of offshore, Lumbrineris assemblage on the coastal area o Yibug and Prionospio assemblage in the coastal area south of Yibug. Tharyx-Chone assemblage had the highest species number of 75 spp. and Prionospio assemblage had the highest density of 3,695 indiv.m/SUP -2/ due to the predominance of prionospio sp.. Hemipodus assemblage with the lowest density occupied the largest area in offshore region. The southern Kyeonggi Bay showed higher species number and lower density than the northern Kyeonggi Bay. But the dominant Polychaetes were similar between the southern Bay and the channel regions of the northern Bay.

Faunal Assemblages of Benthic Macrofauna in the Inter- and Subtidal Region of the Inner Kyeonggi Bay, West Coast of Korea

신현출,최진우,고철환,Shin, Hyun Chool,Choi, Jin Woo,Koh, Chul Hwan The Korean Society of Oceanography 1989 韓國海洋學會誌 Vol.24 No.4

An investigation on the soft-bottom macrobenthic community in the inner Kyeonggi Bay was conducted in July, October of 1987 and February, May of 1988. The benthic fauna comprised a total of 87 species and showed mean density of 550 indiv./$m^2$. Major faunal groups are polychaetes, molluks, and crustaceans, corresponding to 64.7%, 17.4%, and 15.2% in total abundance respectively. The most abundant species was Tharyx sp. (10.9%), and followed by Mactra veneriformis (10.5%), Mediomastus sp. (8.6%), and Glycinde sp. (8.0%) etc.. The important species in the intertidal zone were Mactra veneriformis, Hinia festiva, and Nephtys californiensis, whereas those in subtidal channel region were Tharyx sp., mediomastus sp., Sternaspis scutata, and Nephtys polybranchia. The study area could be divided into 4 station groups based on the species composition; two groups within interidal flat and two in channel regions. Each station group sustained its specific benthic faunal assemblage; Mactra-Hinia, Aricidea-Haploscoloplos assemblages in the intertidal flat and Harpiniopsis-Urothoe, Mediomastus-Sternaspis assemblages in the subtidal channel region. The Mediomastus-Sternaspis assemblage showed the highest species number and population density, and also did the highest diversity and evenness indices. The Harpiniopsis-Urothoe assemblage showed the poor species composition and abundance, and so recorded the highest dominance index. Two assemblages in the intertidal flat had the intermediate values in all the biological parameters. The northern channel region of zone S-2 showed the high abundance in species composition, which seems to be caused by the heterogeneous sediment and the organic enrichment from the Han River and the Incheon industrial complex.

암반조간대 대형저서동물군집에 대한 씨프린스호 유류 유출사고 영향 평가

신현출 ( Hyun Chool Shin ),이정호 ( Jung Ho Lee ),임경훈 ( Kyeong Hun Lim ),윤성명 ( Seong Myeoung Yoon ),고철환 ( Chul Hwan Koh ) 한국환경생물학회 2008 환경생물 : 환경생물학회지 Vol.26 No.3

남해안 도장항(평일도)에서의 저서다모류군집의 시ㆍ공간적 변화

신현출(Hyun Chool Shin),김용현(Yong Hyun Kim) 전남대학교 수산과학연구소 2001 수산과학연구소논문집 Vol.10 No.-

This study was carried to investigate the temporal variation of the benthic polychaetous community in Dojang Harbor of Pyeongil 1s., from August, 1999 to May, 2000. Polychaetes, the most dominant faunal group comprising 83.7% of the total number of benthic macrofauna, collected as a total of 62 species with a mean density of 2,448 ind./㎡. With the passage of time, the density increased toward the inner bay, and the species number increased toward the outer bay. The most abundant polychaete was Lumbrineris longifolia(58.2%), and followed by Tharyx sp.(10.8%), Praxillella affinis(6.2%), Terebellides horikoshii(3.6%) and so on. Comparing with the past studies investigated near Dojang Harbor, Glycera chirori, Ampharete arctica and Poecilochaetus johnsoni was importnat species. In the present study in the Dojang Harbor, L. longifolia and Tharyx sp. showed very high densities. The dominance of L. longifolia and Tharyx sp. as potential organic pollution indicator species in this study area mean the organic pollution of Dojang Harbor, due to the dicsharge of domestic sewage and waste ship oil.

남해안 여자만(여호항)에서의 저서다모류군집의 시ㆍ공간적 변화

신현출(Hyun Chool Shin),김용현(Yong Hyun Kim) 전남대학교 수산과학연구소 2001 수산과학연구소논문집 Vol.10 No.-

This study was carried out to investigate the temporal variation of the benthic polychaetous community in Yoho Harbor in Yoja Bay, from August 1999 to May 2000. Polychaetes, the most dominant faunal group comprising 49.8% of the total number of benthic macrofauna, collected as a total of 52 species with a mean density of 296 ind./㎡. With the passage of time, the density increased toward the inner bay, and the species number increased toward the outer bay. The most abundant polychaete was Heteromastus filiformis(18.2%), Sigambra tentaculata(13.5%), Eteone longa(11.8%) and so on. Comparing with the past studies investigated near the study area, the importance of Prionospio sp.(22.2%), Sternaspio scutata(22.2%) and Notomastus sp.(22.2%) were the dominant species, but in present study, the densities of these dominant species were low. The dominance of H. filiformis, as potential organic pollution indicator species in this study area, mean the progress of organic pollution of Yoho Harbor.

Convergence Acceleration of the LMS Algorithm Using Successive Data Orthogonalization

신현출(Hyun-Chool Shin) 대한전자공학회 2008 電子工學會論文誌-SP (Signal processing) Vol.45 No.2

적응 필터의 입력 신호의 상관도 (correlation)가 클 경우 LMS 알고리즘의 수렴 속도는 상당히 느려지게 된다. 본 논문에서는 입력 신호의 상관도가 높은 상황에서 수렴 속도를 향상시킬 수 있는 적응 필터링 알고리즘을 제안한다. 입력 신호에 대하여 직교성을 가지도록 변환을 인위적으로 가하여 LMS 알고리즘의 한계를 극복한다. 제안한 알고리즘의 성능 향상은 시스템식별 모델을 통하여 그 수렴 속도의 개선을 확인하며 또한 시변 환경 하에서 적응 필터의 시변 추적 능력을 통해 보여 진다. It is well-known that the convergence rate gets worse when an input signal to an adaptive filter is correlated. In this paper we propose a new adaptive filtering algorithm that makes the convergence rate much improved even for highly correlated input signals. By introducing an orthogonal constraint between successive input signal vectors we overcome the slow convergence problem of the LMS algorithm with the correlated input signal. Simulation results show that the proposed algorithm yields fast convergence speed and excellent tracking capability under both time-invariant and time-varying environments, while keeping both computation and implementation simple.

남해안 소리도 연도항 저서다모류군집의 시ㆍ공간적 변화

신현출(Hyun Chool SHIN),김용현(Yong Hyun KIM) 전남대학교 수산과학연구소 2000 수산과학연구소논문집 Vol.9 No.-

This study was carried out to investigate the temporal variation of the benthic polychaetous community in Yeondo Harbor of Sorido, from August, 1999 to May, 2000. Polychaetes, the most dominant faunal group comprising 85.1% of the total number of benthic macrofauna, collected as a total of 70 species with a mean density of 2,262 ind./m² With the passage of time, the density increased toward the inner bay, and the species number increased toward the outer bay. The most abundant polychaete was Prionospio sp.(16.7%), and followed by Lumbrineris longifolia(16.7%), Chone teres(9.3%),Aricidea sp.(8.9%), Tharys sp.(8.6%) and so on. Comparing with the past studies investigated near Yeondo Harbous, the importance of Magelona japonica, the most dominant species in 1996-1997, decreased with time, but Heteromastus filiformis and Sternaspis scutata appeared as the dominant species in 1998. In the present study, the density of H. filiformis increased, but S. scutata decreased greatly. Prionospio sp., L. Longifolia. C. teres, and Tharyx sp., showing a little densities in past study, occurred as dominant species in present study. The dominance of Prionospio sp., L. longifolia, C. teres, and Tharyx sp. As potential organic pollution indicator species in this study area mean the organic pollution of Yeondo Harbor, due to discharge of waste ship-oil and domestic sewage. And also the benthic ecosystem of Sorido was thought to be varied in the process of long-term succession by the past oil-spill pollution of Sea Prince.

탄도만 갯벌의 저서동물 군집

신현출(Hyun Chool SHIN),임경훈(Kyeong Hun LIM) 전남대학교 수산과학연구소 2003 수산과학연구소논문집 Vol.12 No.-

The present study was performed to obtain ecological information about the tidal flats in Tando Bay on the west coast of Korea. Macrobenthic communities were studied at 16 stations and 2 transects on the Tando tidal flats, during June 2003. 14 sampling stations with an 100 m (GY line) or 200 m (SH line) interval were chosen in each tidal flat transect. Duplicate macrobenthos samples were collected using a can corer (10×25 ㎝) at each station during the study period. Total number of species in Tando tidal flats were 88 species, with a mean density of 6282 ind./㎡. There were 43 species of polychaetes (48.9%), 22 species of molluscs (25%), 19 species of crustaceans (21.6%), in Tando tidal flat. Molluscs were represented as a dominant faunal group in Tando tidal flat with a mean density of 4991 ind./㎡, comprising 79.5% of the total benthic animals. This result is because of Molluscs, Musculus senhausia appeared almost quite plentifully from all station. Major dominant species in the Tando tidal flat were Molluscs Musculus senhausia, Laternula anatina, Crustaceans Amphipoda spp., Ilyoplax dentimerosa, Polychaetes Lagis bocki, Cirriformia tentaculata, Heteromastus filiformis, Glycera chirori, Lumbrineris longifolia whose mean densities were 4783, 66, 215, 111, 146, 91, 100, 78, 64 ind./㎡, respectively. Cluster analysis based on the faunal composition showed that Tando tidal flat could be divided into two station groups.

득량만 저서다모류군집의 공간분포

김용현,신현출,Kim, Yong-Hyun,Shin, Hyun-Chool 한국해양학회 2002 바다 Vol.7 No.1

본 연구는 남해안에 위치한 반폐쇄적인 득량만에서 저서다모류 군집분포를 파악하고 과거에 조사한 결과와 비교하면서 변화과정을 살펴보기 위해 수행하였다. 득량만은 1996년과 1997년에 걸쳐 총 98개 정점을 선정하여 조사하였다. 표층 퇴적상은 clayey silt상으로 나타났다. 전체 저서동물의 평균서식밀도는 871 ind./m$^{2}$이었다. 만 중앙역에서의 서식밀도는 종밋(musculus senhousia)과 쿠마류가 몇몇 정점에서 극우점으로 분포하였기 때문에 가장 높았다. 저서다모류의 출현종수는 100종으로 출현하였고, 서식밀도는 138 ind./m$^{2}$으로 나타났으며, 만 북단과 만 중앙역의 일부 정점, 그리고 만 입구역에서의 분포가 높았으나, 전반적으로 빈약한 군집을 형성하고 있었다. 1.0% 이상 우점한 종은 총 21종으로 전체 다모류중 78.3%를 차지하였다. 이 중 Lumbrineris longifolia(9.3%)가 가장 우점하였으며, Eteone longa(7.3%), Heteromastus filiformis (7.1%), Sternaspis scutata(6.1%)의 순으로 나타났다. 우점종을 기초한 집괴분석을 수행한 결과, 크게 3개의 정점군으로 대별되었다. 내만역과 천해연안역을 포함한 정점군 AI은 만북단역과 천해지역으로, 가장 우점한 종은 Heteromastus filiformis이었다. 정점군 AII는 만 입구역과 몇몇 수로지역으로 Lumbrineris longifolia와 Eteone longa가 가장 우점하였다. 그리고 정점군 B는 내만역과 수로지역이 맞닿는 지역으로 Sternaspis scutata가 가장 우점하였다. 과거의 연구와 비교해 보면, 저서다모류군집은 출현종수, 서식밀도와 우점종에 있어서 큰 변화를 보였다. 과거의 조사결과에서는 우점종이 Sternaspis scutata와 Eteone longa이었으나, 본 조사에서는 이 종들의 서식밀도가 감소하였다. 반면에 잠재적 유기물 오염 지시종으로 알려진 Lumbrineris longifolia와 Heteromastus filiformis가 서식밀도는 낮지만 새롭게 우점종으로 대두하였다. 이러한 사실들로 볼 때, 득량만은 한국의 다른 만들과는 달리 아직까지 오염이 덜한 해역인 것으로 사료되나, 환경관리에 주의를 요하는 것으로 판단된다. This study was carried out to investigate the composition and the distribution of the benthic polychaetous communities in Deugryang Bay, semi-enclosed bays, on the southern coast of Korea and to deduce temporal changes in community with the comparison of the past studies. In Deugryang Bay, benthic polychaetous community structure was investigated on the base of the samples from 98 stations in 1996 and 1997. The main facies of surface sediment was clayey silt. The overall benthic macrofaunal density was 871 ind./m$^{2}$. The density was highest in the middle part of the bay because Musculus senhousia (Bivalvia) and cumaceans (Crustacea) had their highest densities in some stations. Benthic polychaetes were comprised of 100 species with a mean density of 138 ind./m$^{2}$. Their abundances were higher in the inner bay, in the middle bay, and in the mouth of bay, but poor community structures were established in the whole bay. The dominant species over 1.0 percentage were composed of the total 21 species, and they occupied 78.3% of the total abundance of the benthic polychaetes. The most dominant species was Lumbrineris longifolia (9.3%), followed by Eteone longa (7.3%), Heteromastus filifomis (7.1%), Sternaspis scutata (6.1%). From the cluster analysis, the study area could be divided into three station groups. Station group AI was located in the inner bay and in the shallow coastal region, and its most dominant species was Heteromastus filiformis. At the station group AII in the mouth of bay and in some channel region, its most dominant species were Lumbrineris longifolia and Eteone longa. And at the station group B located in middle part of the bay, the most dominant specis was Sternaspis scutata. In comparison with previous studies, the benthic polychaetous community experienced great change in the view of species number, density and dominant species. The dominant species were Sternaspis scutata and Eteone longa, but their densities declined greatly. Instead of these species, Lumbrineris longifolia and Heteromastus filiformis, known as the potential organic enrichment indicator species, appeared to the new dominant species even if their low densities. These facts mean that Deugryang Bay was maintained yet as little organic enriched area compared to other bays on the coast of Korea, but needed some caution of marine environmental management.