인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
This study analyzed seafloor topography, seabed volume backscattering strength (S<sub>v</sub>), and vulnerable marine ecosystem (VME) distribution in a high-seas fishing area of the Southwest Atlantic using commercial 18 kHz single-beam acoustic data collected during 2017–2019. Acoustic data were processed through noise removal, bottom detection, elementary distance sampling unit definition, and spatial matching with bottom-longline VME collection records. Sixteen VME indicator taxa totaling 576.86 kg were recorded mainly near canyon margins, slopes, and elevated topographic features. VME records occurred at depths of 867–3,036 m, while major taxa had mean depths generally around 1,700–1,800 m. Taxon-specific mean S<sub>v</sub> values at matched VME locations ranged from -11.17 to -20.89 dB, with frequent values near -15 dB. Relatively high S<sub>v</sub> values occurred on elevated topographic features, whereas lower values were observed in deeper canyons and basin areas. Commercial single-beam acoustic data can support exploratory assessment of relative seafloor acoustic conditions and their spatial association with VME collection records. Independent validation using multibeam acoustics, seabed imagery, and sediment samples is needed to identify substrate types and develop quantitative VME habitat models.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.