• Journal of the Korean Geographical Society
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• v.51 no.6
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• pp.739-759
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• 2016

C. Gottsche(1855-1909), the Deutsch geologist, was invited by $M{\ddot{o}}llendorff$ who was the viceminister of foreign affairs in Korea, and travelled through the inland of Korean peninsula in 1884. He covered 2,550km in 138 days. After that journey, he wrote three academic papers about the geography and geology of Korea with the data of that field trip. Those paper bear considerable significance in that they included the first approaches to Korean geography and geology by a field-scientist with a modern academic training. Unlike other two papers focusing on the geology or the minerals, "The Geography of Korea(${\ddot{U}}ber$ Land und Leute in Korea(1886))" has its own value as a historical document, because it shows how the contempory Korea actually appeared to the eye of a $19^{th}$ western field-scientist. As this has not been introduced in Korean acdemic journals yet, this study might contribute to the understanding of how westerners regarded Korea in the end of 19th century.

• Proceedings of the Korean Aquaculture Society Conference
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• 2006.05a
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• pp.528-529
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• 2006

• The Korean Journal of Malacology
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• v.17 no.2
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• pp.117-123
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• 2001

A genetic analysis using starch gel electrophoresis was peformed to clarify the degrees of genetic differentiation among two species of the genus Koreanomelania and Koreoleptoxis (Gastropoda, Pleuroceridae). The average genetic similarity coefficients (S) among the populations of K. nodifila was S=0.848 (0.805-0.905) and K. globus ovalis was S : 0.755 (0.666-0.860). The genetic similarity coefficients between Semisulcospira gottschei and K. nodifila, S. gottschei and K. globus ovalis, and K. nodifila and K. giobus ovalis were 0.194, 0.301, and 0.301, respectively. So between K. nodifila and K. globus ovalis seems to be genetically two distinct taxa.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.177-178
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• 2003

어분은 단백질 함량이 높고 필수 아미노산 및 필수지방산이 고루 갖추어진 양질의 단백질원이지만, 가격이 비싸고 어획량 변동이 심해 공급이 불안정한 실정이다. 따라서 경제적인 양식사료의 개발을 위해서는 값이 싸고 공급이 안정적인 단백질원을 개발하여 사용하는 것이 시급하다. 이 중 식물성인 대두박은 단백질 함량과 아미노산 조성 등 영양성분이 비교적 잘 갖추어져 있을 뿐만 아니라,어분에 비해 가격이 저렴하고 공급이 안정적이어서 어분 대체 단백질원으로 활발히 연구되어 왔다. (중략)

• The Korean Journal of Malacology
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• v.12 no.1
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• pp.39-45
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• 1996

Polyacrylamide gel electrophoresis was used to reveal the esterase isozyme patterns of a freshwater snail, Semisulcospira gottschei, in the lake Uiam. From the result with inhibitors, it is tentatively concluded that four types (arylesterase, carboxylesterase, acethylesterase, acethylcholinesterase)of the adult(means of allele per locus=1.16, %polymorphism=16.7, heterozygosity=0.082)was lower than the juveniles(A=1.7, %P=16.7, H$\sub$D/=0.2215).

• The Korean Journal of Malacology
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• v.17 no.2
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• pp.105-115
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• 2001

These studies were conducted to compare the external radulae of seven species (Semisulcospira gottschei, S. coreana, S. forticosta, S. tegulata, S. ibertina, Koreanomelania nodifila and Koreoleptoxis globus ovalis) of freshwater snails in three genera of the family Pleuroceridae in Korea. Under a microscope of 100 magnifications, observation of seven species can be distinguished sharply between three genera of Semisuicospira, Koreanomelania and Koreoleptoxis, and the morphological characters of radulae can be used as taxonomic tool in genus level of Pleuroceridae. Besides SEM photograph of the radulae based on the morphological characters in seven species can be verified a new criteria for classification of genus' unit grade in accord with firsthand drawing sketch under a microscope of 100 magnifications. But it is difficult that all of the species can be detected sharply the difference of interspecies by comparisons of radulae in the family Pleuroceridae in Korea. Therefore, the morphological characters of radulae can not be set a criteria for classification of species level.

• The Korean Journal of Malacology
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• v.11 no.2
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• pp.171-179
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• 1995

한국산 다슬기류의 종별 유전적 변이를 알아보고 계통분류학적 근거를 제공하기 위하여 다슬기속(Simisulcospira)에 속하는 다슬기(S. libertina),주름다슬기,(S. forticosta), 곳체다슬기(S. gottschei), 좀주름다슬기(S. tegulata)및 참다슬기(S. coreana)등 5종을 전국 각지에서 채집하여 전기영동(starch gelelectrophoresis)를 이용해 분자유전학적 분석을 실시한 결과를 용약하면 아래와 같다. 유전적 다형형의 빈도는 58%에서 83%로 대단히 높았고 이형접합자의 평균 빈도도 50%내외였다. Rogers' D를 근거로 한 각 종간 유연관계는 주름다슬기와 곳체다슬기가 근연관계를 이루고 있었으며 이들 두 군과 다슬기는 유전적으로 거리를 두고 있었다. 이러한 결과는 패각의 형채와 비교할 때 유사한 경향을 보였다.

• Environmental Analysis Health and Toxicology
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• v.22 no.2 s.57
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• pp.119-128
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• 2007

The present study was conducted to find out effect of PFOS on survival, activity, growth and organ structure of the melania snail, Semisulcospira gottschei. Experimental groups were composed of one control condition and four PFOS exposure condition (0.1, 0.5, 1.0 and 5.0 mg/L). After 16 week exposure, survival rate and activity were not significantly influenced at the two lower exposure groups, 0.1 and 0.5 mg/L, but they were significantly reduced in 1.0 and 5.0 mg/L groups. Total weight and meat weight rate (MWR) were reduced in PFOS exposure group in comparison to control group. Also, histological degenerations such as acidification of mucous, necrosis and split of muscular fiber bundle, atrophy of anterior pedal gland were recognized in the foot. Hepatopancreas showed the atrophy and degeneration of the digestive cell, vacuolation of digestive gland and closure of lumen in digestive gland.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.43 no.6
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• pp.747-750
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• 2010

This study investigated the effect of wheat flour content in the diet on the growth of the snail Semisulcospira gottschei. Six diets were prepared containing wheat flour contents of 35, 40, 45, 50, 55, and 60%. Three replicate groups of snails (average weight 0.61 g) were fed each experimental diet for 8 weeks. The survival was above 85% in all groups, and did not differ significantly among treatments. The weight gain of snails fed the diets containing 35 and 40% wheat flour was significantly higher than that of snails fed the other diets (P<0.05), and the weight gain decreased when the dietary wheat flour content increased beyond 45%. The crude protein and ash contents in snails were significantly affected by the dietary wheat flour content (P<0.05). Therefore, a diet containing 35~40% wheat flour produces the optimal growth of snails. The results of this study will be used to develop cost-effective diets for commercial snail production.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.36 no.5
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• pp.454-457
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• 2003

A feeding trial was carried out to investigate the utilization of dietary soybean meal and wheat flour as substitutes for fish meal and alginate in different dietary types (powder, pellet and flake) for juvenile snail (Semisulcospira gottschei). After 10 weeks feeding trial, survival was not affected by formulation and type of diets (P>0.05), but weight gain was significantly affected by dietary formulation (P<0.001) and type (P<0.05). In the same dietary formulation, weight gain of the snail fed the flake type of diets was lower than that of the snail fed the powder or pellet types. However, the type of diet did not affect weight gain when snail fed diets containing $37\%$ soybean meal and $18\%$ alginate. The weight gain was lower in the snail fed diets containing $25\%$ fish meal compared with that of the snail for diets containing $33-37\%$ soybean meal at the same dietary type. When soybean meal was used as main protein source in diets, weight gain was not affected by dietary alginate $(0\;and\;18\%)$ and wheat flour $(36\;and\;58\%)$ contents. Crude protein and ash contents of whole body of the snail was not affected either by formulation or by type of diet. Moisture and crude lipid contents of the whole body were significantly affected by dietary formulation, but not by the type. These results indicate that $25\%$ fish meal could be replaced by $37\%$ soybean meal as dietary protein source, and pellet and powder could be desirable dietary type for the optimum growth of the snail.