Aidanosagitta crassa, a key species in South Korea’s coastal waters, exhibits three morphological types: Type C with a collarette-containing trunk, Type N lacking a collarette, and an intermediate Type I. Limited research studies have been conducted on their ecological patterns, prompting this study to elucidate seasonal occurrence patterns of A. crassa types in Pyeongtaek. Field surveys at six stations in Pyeongtaek port were conducted in winter (Feb.), spring (May), summer (Aug.), and autumn (Nov.) of 2010. Water temperature and salinity were measured and zooplankton samples were collected for abundance analysis. Type C predominated in winter and autumn. Type I predominated in summer and Type N predominated in summer and autumn. Occurrence patterns were influenced by water temperature. Type C showed a negative correlation with water temperature. Type N was positively correlated with water temperature. However, Type I showed no significant correlation with water temperature. In 2013, genetic sampling using the mtCOI marker was conducted in winter and summer. Despite morphological differences, genetic analysis revealed intraspecific diversity due to seasonal environmental changes.

1. 서 론
2. 재료 및 방법
    2.1. 해양환경 및 동물플랑크톤 조사
    2.2. Aidanosagitta crassa 형태 분석
    2.3. 분자유전학적 분석
    2.4. 자료 분석
3. 결 과
    3.1. 환경요인과 동물플랑크톤의 계절변동
    3.2. 모악류의 계절변동
    3.3. Aidanosagitta crassa의 형태와 분자생물학적분석 결과
    3.4. Aidanosagitta crassa 유형별 출현 특성
    3.5. 계절별 모악류 분포에 미치는 환경요인
4. 고 찰
5. 결 론
적 요

• 추서휘(전남대학교 빅데이터수산자원관리협동과정) | Seohwi Choo (Interdisciplinary Program of Bigdata Fishery Resources Management, Chonnam National University, Yeosu 59626, Republic of Korea)
• 정만기(전남대학교 스마트수산자원관리학과) | Man-Ki Jeong (Department of Smart Fisheries Resources Management, Chonnam National University, Yeosu 59626, Republic of Korea)
• 서민호(바다생태연구소(주)) | Min Ho Seo (Marine Ecology Research Center, Yeosu 59697, Republic of Korea)
• 정영석(전남대학교 환경해양학과) | Young Seok Jeong (Department of Environmental Oceanography, Chonnam National University, Yeosu 59626, Republic of Korea)
• 박종준(전남대학교 해양융합과학과) | Jongjun Park (Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Republic of Korea)
• 신아영(전남대학교 해양융합과학과) | A-Young Shin (Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Republic of Korea)
• 신아영(전남대학교 빅데이터수산자원관리협동과정, 전남대학교 환경해양학과, 전남대학교 해양융합과학과) | A-Young Shin (Interdisciplinary Program of Bigdata Fishery Resources Management, Chonnam National University, Yeosu 59626, Republic of Korea, Department of Environmental Oceanography, Chonnam National University, Yeosu 59626, Republic of Korea, Department of Ocean Integrated Science, Chonnam National University, Yeosu 59626, Republic of Korea) Corresponding author