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나팔고둥, Charonia lampas sauliae의 산란유발, 유생 및 치패사육에 미치는 수온의 영향
선승천,정춘구,김재민,윤성종,강경호 한국패류학회 2005 The Korean Journal of Malacology Vol.21 No.2
In the present study, the fecundation and fertilization behaviors of the trumpet shell, Charonia lampas sauliae were observed from November 2003 to March 2004.Female has multiple fecundation and multiple fertilization, and the fertilization continued for two days.The fertilized female stayed with the egg mass to protect the eggs, and the fecundation was made during the fertilization.The highest survival rate of egg capsule was 60% at 15℃.Charonia lampas sauliae fed with Chaetoceros calcitrans, Isochrysis galbana, and Pavlova lutheri. Growth and survival rates of C. lampas sauliae in the conditions of various water temperature were observed. The highest survival rate was 23% at 15℃ reared for 60 days. The growth was presented in the 15℃ group, with shell length from 408 ± 21.52 m to 625 ± 19.76 m during the experiment. 나팔고둥의 효율적인 종묘생산을 위한 생물학적 기초자료를 얻고자 산란유발, 유생 및 치패사육에 미치는 수온의 영향에 대하여 실험한 결과는 다음과 같다.수온별 나팔고둥의 산란양을 조사한 결과, 가장 많은 산란을 한 15℃에서 전체 암컷이 2003년 11월에 113 개의 난낭을 산란하였고, 12월 345 개, 2004년 1월 1,232 개, 2월에 1,045 개의 난낭을 산란하여 우리나라에서 나팔고둥의 산란기는 1월과 2월임을 알 수 있었다.나팔고둥의 발생속도를 파악하기 위한 난발생과 유생의 성장 단계는 수정란, 4-세포기, 8-세포기, 상실기, trochophore, veliger, hatched veliger로 구분하였는데, 난낭을 뚫고 부출하기까지 약 50-83일이 소요되었다. 각 발생 단계의 수온별 소요시간을 보면 8-세포기까지 10℃에서는 10일, 15℃에서 7일이 걸렸고, 20℃와 25℃에서는 5일이 소요된 반면, 5℃와 30℃에서는 발생이 관찰되지 않았다.나팔고둥 유생의 수온별 성장을 조사한 결과, 10℃와 30℃에서는 모든 유생이 폐사하였고, 25℃의 경우 실험개시시 평균체장 408 ± 21.52 m이던 유생의 30일 경과 후 544 ± 23.22 m, 60일 경과 후 683 ± 19.76 m로 성장하여 가장 높은 성장을 보였으나, 생존율은 10%로 가장 낮았다. 또한 15℃의 경우 30일 경과 후 509 ± 18.34 m, 60일 후 625 ± 19.76 m로 성장하였고, 생존율은 23%로 가장 높게 나타나 치패사육시 가장 적정한 수온은 15℃라 판단되었다.
강경호,선승천,김재민,Liang Liang Zhuo,김현정 한국패류학회 2009 The Korean Journal of Malacology Vol.25 No.1
The trumpet shell Charonia sauliae is an endangered and valuable species with potential for aquaculture. For artificial propagation of C. sauliae, the effects of three different food microalgae on the development, growth, and survival rate of the larvae and spat were investigated. For the larval feeding experiments, we utilized six microalgae species as food sources, namely Pavlova lutheri, Tetraselmis suecica, Nannochloris oculata, Isochrysis galbana, Chaetoceros calcitrans, and Phaeodactylum tricornutum; for the larval and spat growth and survival experiments, we utilized T. suecica, C. calcitrans, and P. tricornutum. The results showed that the temporal digestion index (TDI) for the veliger larvae was significantly different for C. sauliae fed the different microalgae species (P < 0.05), that the T. suecica, C. calcitrans, and P. tricornutum cultivars were better suited for larval consumption (P < 0.05), and that the growth and survival of the larvae and spat were significantly influenced by food type, specifically P. tricornutum (P < 0.05). Further research is needed to evaluate the effects of other microalgae species, different algal concentrations, and biochemical composition on the growth and survival of C. sauliae.
북방전복 (Haliotis discus hannai) 과 둥근전복 (H. discus discus) 의 종내 교잡에 따른 순종과 교잡종의 성장과 생존 비교
오영대,선승천,이경식,임한규 한국패류학회 2018 The Korean Journal of Malacology Vol.34 No.1
This study conducted hybridizations between cold water Haliotis discus hannai and warm water Haliotis discus discus to produce both hybrid and pure hatchery stock and then compared growth and survival between the hybrid and pure seeds which were reared in indoor tanks and then seawater cages. A 250 day long culture in indoor tanks showed the highest growth in the hybrid H. discus hannai ♀ × H. discus discus ♂, which was followed by the pure H. discus hannai ♀ × H. discus hannai ♂. After the 250 day long culture in tanks, seeds with about 34 mm shell length were selected from the tanks and transferred to seawater cages to be reared for another 950 days. The sea cage culture also showed the highest growth in the hybrid H. discus hannai ♀ × H. discus discus ♂ like indoor culture. Survival rate of the pure H. discus hannai ♀ × H. discus hannai ♂, the hybrid H. discus hannai ♀ × H. discus discus ♂, the hybrid H. discus discus ♀ × H. discus hannai ♂, and the pure H. discus discus ♀ × H. discus discus ♂ during the 950 day cage culture was 38.63 ± 0.02%, 39.63 ± 0.01%, 31.25 ± 0.02% and 24.25 ± 0.05%, respectively, indicating the hybrid H. discus hannai ♀ × H. discus discus ♂ having the highest Survival rate. In conclusion, the comparison of growth and mortality between the hybrid and pure seeds reared in land-based tanks and seawater cages demonstrated that the hybrid H. discus hannai ♀ × H. discus discus ♂ performed the best.
Gonadal development and reproduction in the trumpet snail, Charonia sauliae
강경호,김재민,선승천,Liang Liang Zhuo,김현정 한국패류학회 2009 The Korean Journal of Malacology Vol.25 No.1
This study devised and tested a histological staging system for gonadal development in the trumpet snail, Charonia sauliae, which was collected along the south coast of Jeju Island, South Korea. This paper details for the first time the gonadal development characteristics of C. sauliae. Ovary and testis development in C. sauliae can be roughly divided into five stages: growing, mature, spent, degenerative, and resting. The trumpet snail has multiple fecundation and fertilization [cycles?] during the spawning season for out-of-step gonadal development in high-temperature and low-salinity environments. Female trumpet snails tended to have larger shells and were more abundant than males (64.26% of all animals collected were female).