• Animal Systematics, Evolution and Diversity
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• 제35권2호
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• pp.73-75
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• 2019

Members of this family Sciomyzidae are known as marsh flies and snail-killing flies because most of the known larvae are obligate predators of Mollusca, especially freshwater and terrestrial Gastropoda. Most species are found in the shallow ephemeral aquatic habitats with rich organic substrates, such as the hard-water streams, small ponds and lakes in mountain valleys. To date, a total of 8 marsh fly species in 4 genera have been known in Korea. During a taxonomic survey of the family Sciomyzidae in Korea, the authors have found the genus Ditaeniella Sack, 1939; thus, it was discovered for the first time in Korea. This genus can be distinguished by the other related taxa with hairs over much of the mesopleuri, hairs on the prosternum and one orbital seta. In addition, the nominate species, Ditaeniella grisescens Meigen, 1830 was also firstly recoded in the Korean fauna.

• Animal Systematics, Evolution and Diversity
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• 제39권4호
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• pp.295-299
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• 2023

Two land snails, Aegista chejuensis (Pilsbry and Hirase, 1908) and Plectotropis quelpartensis (Pilsbry and Hirase, 1908), are endemic to Korea and were collected from Hataedo and Jodo Islands in the Yellow Sea of South Korea, respectively. Many terrestrial snail habitats have been confirmed in Korea; however, their genetic sequences have rarely been reported. This study describes the mitochondrial cytochrome c oxidase subunit I gene (COI) sequences of two species, followed by an analysis of the genetic distance between these two species and their congeners. As a result, there was no intra-species variation in both species A. chejuensis or P. quelpartensis. However, the inter-species variation was clear (10.3-31.5%). We provide photographs and a brief diagnosis for morphological verification.

• 한국패류학회지
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• 제24권3호
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• pp.167-173
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• 2008

본 논문은 수온과 염분 및 먹이에 따른 큰구슬우렁이의 생존율과 성장을 실내 수조에서 실험한 결과이다. 30일동안 사육한 수온별 생존율은 $15^{\circ}C$(50%)와 $20^{\circ}C$(60%)의 수조에서 $25^{\circ}C$(50%)와 $30^{\circ}C$(0%) 수조보다 높은 생존율을 보였다. 실험기간동안의 총증중량은 $20^{\circ}C$에서 3.79 g, $15^{\circ}C$에서 3.13 g, $25^{\circ}C$와 $30^{\circ}C$에서는 모두 폐사하였다. 증중률은 $20^{\circ}C$에서 12.20%, $15^{\circ}C$에서 9.95%였으며, 일간 증중율은 $20^{\circ}C$에서 0.407%, $15^{\circ}C$에서 0.332%였다. 염분별 생존율은 30 psu(70%)와 35 psu(70%)에서 높은 생존율을 보였고, 20 psu에서는 10%로 낮게 나타났으며, 10 psu와 15 psu에서는 실험시작 10일 이내에 모두 폐사하였다. 총중량으로 산정한 실험기간 동안의 증중률은 35 psu에서 11.641%, 30 psu에서 9.766%, 25 psu에서 1.437%, 20 psu에서 0.896%였으며, 일간증중율은 35 psu에서 0.388%, 30 psu에서 0.326%, 25 psu에서 0.048%, 20 psu에서 0.030%였다. 총 60일간 사육한 먹이에 따른 큰구슬우렁이의 생존율은 새우류를 먹인 실험구가 62.5%, 패류를 먹인 실험구가 87.5%, 어류를 먹인 실험구가 75.0%로 패류를 먹인 실험구가 비교적 높은 값을 보였다. 총중량으로 산정한 실험기간동안의 총증중량은 조개류 급이군에서 6.63 g, 어류 급이군에서 1.68 g, 새우류 급이군에서 1.50 g의 순이었으며, 성장률은 조개류 급이군에서 15.001%, 어류 급이군에서 3.934%, 새우류 급이군에서 3.567%를 나타내었으며, 일?lt;봉揚껨 조개류 급이군에서 0.250%, 어류 급이군에서 0.066%, 새우류 급이군에서 0.059% 순으로, 조개류 급이군에서의 성장이 가장 좋았으나, 어류와 새우류 급이군에서는 유의적인 차이를 보이지 않았다.

• 한국패류학회지
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• 제25권3호
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• pp.189-196
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• 2009

본 연구는 2004년 2월부터 2005년 1월전라북도 군산시 고군산군도에서 통발어구로 채취된 피뿔고둥을 조사하였다. 피뿔고둥의 뚜껑에 나타난 윤문은 년 1회 형성되며 주 윤문 형성시기는 7월에서 8월로 조사되었으며, 초륜 형성기간은 13개월(1.08년)로 나타났다. 각고(SH)에 대한 각폭(SW)의 성장식은 SW = 0.7867 SH - 6.3988 ($R^2$ = 0.8604), 총중량(TW)의 상대성장식은 TW = 0.0000626 $SH^{3.206}$ ($R^2$ = 0.8324)과 같이 나타낼 수 있었다. 연령(t)에 대한 각고(SH)와 총중량(TW)의 von Bertalanffy 성장식은 다음과 같다. $SH_t=199.653(1-e^{-0.104(t+2.478)}$ $TW_t=1484.105(1-e^{0.104(t+2.478)})^{3.206}$.

• 대한임상독성학회지
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• 제15권1호
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• pp.65-67
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• 2017

Even though Neptunea contricta appears similar to Batilus cornutus and Rapana venosa, they are different in tetramine content which inhibits the neuronal calcium channel. Therefore, mistaking Neptunea contricta for Batilus cornutus or Rapana venosa, can result in the occurrence of toxic symptoms. Three patients developed nausea, epigastric pain, chest pain, dizziness, blurred vision, dyspnea, hypertension and tachycardia after eating Neptunea contricta. Moreover, consumption of one only piece was sufficient to cause symptoms because each Neptunea contricta has 17.3 mg of tetramine. Accordingly, care should be taken when patients are consuming more than 5 pieces because toxic symptoms such as dyspnea can occur. Moreover, correct species identification is important because the quantity of tetramine varies among sea snail species. Finally, it is important to educate people to remove the salivary glands completely before consuming Neptunea contricta.

• 생태와환경
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• 제45권4호
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• pp.453-458
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• 2012

The golden apple snail, Pomacea canaliculata, is a freshwater snail native to tropical and subtropical South America. The species was introduced into Korea as a human food source in 1983 and was first applied as a weed control agent for the paddy fields in 1992. As the snail is well known as an environmentally friendly biological control agent for weeds, the area of cultivation in which the golden apple snail is used for biological control has been enlarged substantially each year. Currently, the species is observed in open water courses. It is possible that the snail may overwinter in these open water courses and may become a serious pest, as is already the case in many Asian countries. In this study, we determined the status of the overwintering golden apple snail based on a literature survey and investigated the potential distribution area of the snail, as a result from global warming in Korea. The potential distribution area of the overwintering golden apple snail would be enlarged under the influence of global warming; ranging from 45.5% of South Korea's land area in the 2020s to 88.4% in the 2080s.

• 수산해양기술연구
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• 제50권4호
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• pp.455-466
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• 2014

Seasonal variations in species composition of catches were explored using seasonal samples caught by shrimp beam trawl in the Geum river estuary in 2011. During the study period, total catches were collected 91 species as fish 47 species, crustacean 28 species, mollusca 4 species, gastropoda 5 species, shellfish 3 species and others 4 species. The dominant species were Exopalaemon carinicauda, Eriocheir leptognathus, Palaemon gravieri, Mugil cephalus, Acanthogobius hasta, Cynoglossus joyneri, Pennahia argentata and Coilia nasus. The amount of species in spring and summer was higher than in autumn. The diversity index (H') was 0.43~0.96, evenness index (EI) was 0.14~0.25, and richness index (RI) was 1.54~4.25. Using cluster analysis 91 species were divided into 4 groups. Group I appeared mainly in spring and summer. Group II appeared only in summer. Group III appeared in winter and spring, and Group IV in spring and autumn.

• 환경위생공학
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• 제16권3호
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• pp.62-71
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• 2001

The present study was performed to examine the community structure of benthic macroinvertebrates in the provincial park of Mt. Daedun and its nearby region. Sampling was conducted two times in May.June and October.November, 2000. Main two areas are Mt. Anpyong (470.0m) and Mt. Daedun (877.0m) area. Total taxa of benthic macroinvertebrates were 111 species, 47 families, 15 orders, 6 classes in 4 phyla. Aquatic insects were composed of 29 species in ephemeroptera, 10 species in odonata, 7 species in plecoptera, 2 species in hemiptera, 2 species in megaloptera, 23 species trichuptera, 6 species in coleoptera and 17 species in diptera. Other non-insects were composed of 1 species in platyhelminthes, 8 species in gastropoda, 2 species in oligochaeta, 3 species in hirudinea and 1 species in crustacea. Ephemeroptera, trichoptera and plecoptera as indicators in clean water were very abundantly. Occurrence species at each surrey area was 77 species at Mt. Anpyong area and 89 species at Mt. Daedun area, respectively. Mean values of species diversity indices were 3.04 and 2.69, respectively. According to the saprobic system based on the species diversity indices of benthic macroinvertebrates, Mt. Anpyong region are determined as polysaprobic area or ${\beta}-mesosaprobic$ area and Mt. Daedun region are determined as polysaprobic area, $\beta-mesosaprobic$ area or ${\alpha}-mesosaprobic$ area.

• Animal Systematics, Evolution and Diversity
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• 제21권2호
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• pp.157-169
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• 2005

한국의 양식 전복에 공생하는 3종의 단각류가 발견되어 이들을 보고한다 이들 단각류는 볼록손참옆새우(Ampithoe valida Smith), 사마귀멜리타옆새우(Elasmopus rapax Costa), 두발가락멜리타옆새우(Melita rylovae Bulycheva)이며, 이 중에서 사마귀멜리타옆새우는 한국 미기록종으로서 상세히 기재하였고 다른 두 종은 주요 형질을 기재하였다. 이들 단각류가 공생한 전복은 Haliotis discus hannai Inc, H. discus discus Reeve, H. diversicoior aquatilis Reeve, 그리고 H. siebolidii Reeve이다. 관찰한 단각류와 전복들 사이에는 종 특이적 관계는 보이지 않았다

• 한국어류학회지
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• 제12권1호
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• pp.54-61
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• 2000

등가시치의 식성을 조사하기 위해 가덕도 주변해역에서 1998년 3월부터 1999년 2월까지 채집된 등가시치의 위내용물을 분석하였다. 등가시치의 주요 먹이생물은 새우류 (Caridea), 옆새우류 (Gammaridea), 어류 (Pisces), 이매패류 (Bivalvia) 그리고 쿠마류 (Cumacea)였다. 그 외에 요각류 (Copepoda), 카프렐라류 (Caprel1idea), 패충류 (Ostracoda), 게류 (Brachyura), 두족류 (Cephalopoda), 복족류 (Gastropoda), 거미불가사리류 (Ophiuroidea) 및 갯지렁이류 (Polychaeta)가 위내용물 중 발견되었으나, 그 양은 많지 않았다. 등가시치가 성장함에 따라 먹이생물 조성에 있어서 변화를 보였는데, 작은 체장에서는 옆새우류, 이매패류 치패, 쿠마류 및 패충류 등 소형 먹이생물을 비교적 다양하게 섭취하였다. 그러나 성장하면서 소형 먹이생물들이 위내용물 중 차지하는 점유율이 급격히 낮아졌으며, 반면 새우류와 어류 등 비교적 큰 먹이생물의 점유율이 크게 증가하였다.