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절식, 수온 및 유속이 극동산 뱀장어(Anguilla japonica) 렙토세팔루스의 변태 유도에 미치는 영향
김대중 ( Dae Jung Kim ),이남실 ( Nam Sil Lee ),김경길 ( Kyung Kil Kim ),장대수 ( Dae Soo Chang ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.5
We determined the effects of starvation, water temperature, and water flow on the onset of metamorphosis in lep-tocephali of the Japanese eel Anguilla japonica. Leptocephali larger than 50 mm (ca. 200 days old) were reared in 10-L tanks under different feeding, water temperature, and water flow regimes. Fasted leptocephali metamorphosed earlier and faster than did the fed ones. Metamorphosis was faster in the high water flow tank (1.2 L/min) than in the tank with flow at 0.6 L/min. The duration of metamorphosis was slightly shorter at 26℃ than at 23℃. To conclude, starvation induced the metamorphosis of artificially produced leptocephali larger than 50 mm TL. Increased water flow and water temperature both appear to induce and shorten metamorphosis.
제주도산 소라 (Batillus cornutus) 성패의 특정 해조류에 대한 선호도
유준택,오봉세,장대수,Yoo, Joon-Taek,Oh, Bong-Se,Chang, Dae-Soo 한국패류학회 2011 The Korean Journal of Malacology Vol.27 No.4
This paper examines relation between growth of adult top shell and their selectivity over different marine algae. For the study the top shell density and the algal species in different depth were surveyed by SCUBA. To test selectivity over different types of algae, five algal species including Ecklonia cava, Undaria pinnatifida, Ulva spp, Gelidium amansii and Sargassum spp were provided to top shells in indoor water tank condition. In the field survey, the wet weight of Ecklonia cava was significantly (r = 0.612, p < 0.05) correlated to the shell length (SL) of top shell. In the indoor water tank experiment conducted over 12 hours after sunrise, adult top shell (SL > SL 4.5 cm) tended to select Ecklonia cava and Undaria pinnatifida, which are common and abundant algal in the subtidal waters in Jeju Island. Our field survey and the indoor experiment suggest that E. cava and U. pinnatifida could be food preferred by adult top shell in its habitat.
해가리비, Amusium japonicum japonicum (GMELIN)의 연령과 성장에 관한 연구
손팔원,하동수,노섬,장대수,Son Pal-Won,Ha Dong-Soo,Rho Sum,Chang Dae-Soo 한국양식학회 1996 韓國養殖學會誌 Vol.9 No.4
해가리비의 패각에 나타난 윤문을 이용한 연령과 성장 및 생태에 관한 몇 가지 특징을 검토한 결과는 다음과 같다. 서귀포를 중심으로한 제주도 남부해성에 주로 분포하고 있는 해가리비의 산난기는 수온이 $17\~20^{\circ}C$되는 10월에서 12월로 나타났고, 2회 이상 다회산난하는 것으로 판단된다. 분포수온은 $14\~23^{\circ}C$ 범위이고, 주 서식장소는 사이질인 수심 $30\~40$ m였다. 패각에 나타난 윤문형성 시기는 산란기와 일치되고 있었다. 해가리비의 각고성장은 비교적 빠른 것으로 나타났고, 1연패의 경우 각고 6.28 cm, 2연패의 경우는 9.07 cm로 나타났으며, 이론적인 최대 각고는 13.3 cm 였다. 체중의 증가는 1세때 18.8 g, 2세 60 g, 3세의 경우는 102.4 g으로 급격히 증가하고, 최대체중은 198.8 g인 것으로 나타나, 금후 자연채묘에 의하여 양식을 시도하였을 때, 충분한 산업적 가치가 있을 것으로 여겨진다. Age, annual growth pattern, and other ecologically important observations are reporting from the analysis of annual growth annuli of the sun and moon scallop, Amusium japonicum. Field survey made from 1993 to 1994 indicated that the sun and moon scallops are mostly distributed along the southern coast of Cheju-do, especially around the Sogwipo area. They inhabit on muddy sand bottom, at depth between 30 and 40 m where water temperature varies from 14 to $23^{\circ}C$ annually. The gonadal analysis indicated that the spawning mostly occurs during October and December and they exhibit multiple spawning peaks. The formation of annual growth annuli was found to be related with their spawning period. The shell growth on A. japonium japonicum appeared that their shell growth rate is comparatively faster than that of other scallops : 1. japonium japonicum reaches 6.28 cm in shell hight at the first year and 9.07 cm at the second year. The growth rate of gonadal somatic tissue was also found to be faster than growth rates of other scallops. One year old scallops weigh about 18.8 g, two and three year old scallops weigh 60 and 102.4 g. Based upon these observations, it is concluded that A. japonium japonicum can be a valuable species for aquaculture development due to their rapid growth.
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.
김영섭,김영혜,김종빈,장대수,이동우,강현정,Kim, Young-Seop,Kim, Yeong-Hye,Kim, Jon-Bin,Chang, Dae-Soo,Lee, Dong-Woo,Kang, Hyun-Jung 한국패류학회 2010 The Korean Journal of Malacology Vol.26 No.4
Reproductive biology of the purplish Washington clam, Saxidomus purpuratus was investigated based on the samples captured in Jinhae Bay, the East China Sea from January to December 2002. The gonad index (GI) began to increase in January, reached the maximum value in March. The reproductive cycle of this species can be divided into five successive stages: the early active stage (from November to January), the late active stage (from December to February), the ripe stage (from February to May and October), the spawned stage (from May to December), and inactive stage (from November to December). The spawning period was from April to December, and the main spawning occurred between June and August. The shell length at 50% group maturity was estimated to be 71.85 mm. The Sex ratio of this species was not significantly different a 1:1 sex ratio (P > 0.05). 개조개 표본은 동중국해의 진해만에서 잠수선에 의해 어획된 것을 2002년 1월부터 12월까지 매월 120개체씩 채집된 것이다. 생식소 발달단계는 비활성기 (11월-12월), 초기활성기 (11월-이듬해 1월), 후기활성기 (12월-이듬해 2월), 성숙기 (2월-5월과 10월), 산란기 (4월-12월) 등 5단계로 구분되었다. 주산란시기 6월부터 8월까지이었다. 성숙각장은 71-85mm로 추정되었다. 암컷과 수컷 성비는 유의한 차가 없었으므로 1:1이었다.
한국 진해만 해역에 분포하는 개조개, Saxidomus purpuratus의 재생산 연구: 산란 및 군성숙각장
이선길 ( Sun Kil Lee ),장대수 ( Dae Soo Chang ),김종빈 ( Jong Bin Kim ),박미애 ( Mi Ae Park ) 한국어업기술학회 2013 수산해양기술연구 Vol.49 No.4
This study investigated purplish Washington clam, Saxidomus purpuratus on its gonadal development, reproductive cycle and shell length (age) at 50% female group maturity from January to December 2011 in Jinhae Bay, Korea. This species is dioecious. The gonad index (GI) began to increase in January, reached the maximum value in May and to decrease in June, reached the minimum value in September then to increase slowly in October again. The reproductive cycle of the clams can be divided into five successive stages: the early active stage (Ea, from February to March), the late active stage (La, from January to March and October to December), the ripe stage (R, from January to May), the spawning stage (S, from June to December) and the degenerative and inactive stage (Ia, from January to February and November to December). The spawning periods were from June to December and the main spawning periods were from July to October. The shell length at 50% female group maturity (SL50) was estimated to be 63.6 mm, which can be converted as sexual maturity age of 2.2 year.