갯녹음 지역과 바다숲 조성지에 서식하는 둥근성게, Strongylocentrotus nudus, 산란기의 생태적 특성 (Comparative Ecological Characteristics of Globular Sea Urchin Spawning Period of Strongylocentrotus nudus in Barren and Marine Forest Areas)

서지정보

· 발행기관 : 한국수산해양교육학회
· 수록지 정보 : 수산해양교육연구 / 36권 / 3호 / 479 ~ 494페이지
· 저자명 : 최윤석, 김병수, 손용수, 김형해, 이동제, 김명래, 박기영

초록

Ecological characteristics of the globular sea urchin Strongylocentrotus nudus in barren areas (due to blanching) and seaweed forest (constructed) areas was compared during the spawning period of August to December off shore Duekshin-ri, Uljin, Kyeongbuk Province of Korea. Seaweed communities consisted of a total of 18 species in 3 phyla with biomass of 481.4 g/m2 the barren areas, and a total of 18 species in 3 phyla with 8,259.9 g/m2 in the seaweed forest, where 17.2-fold higher biomass than that in the barren habitats was recorded. Sea urchins tests were with ranges of their diameter from 4.8 to 7.9 cm (monthly mean: 5.5–6.2 cm) in the barren areas and 4.9 to 7.6 cm (monthly 5.3–6.3 cm) in the seaweed forest. Ranges of test heights fell between 2.3 and 4.8 cm (mean 3.0–3.3 cm) in the barren areas, and 1.6 and 4.8 cm (3.0–3.7 cm) in the marine forest areas. Gonad index of sea urchins peaked in September in the barren areas (15.9) and the marine forest areas (25.1), decreased until November (to 3.9 and 4.5, respectively), then increased progressively again from December. Gonad index was 1.6-fold higher in the marine forest areas than that in the barren areas. Despite the region- or water temperature-dependent variations the spawning period is estimated to be from August to November on the east coast and it can be an effective way for scientific sea forest management to remove sea urchins before the spawning period.

영어초록

Ecological characteristics of the globular sea urchin Strongylocentrotus nudus in barren areas (due to blanching) and seaweed forest (constructed) areas was compared during the spawning period of August to December off shore Duekshin-ri, Uljin, Kyeongbuk Province of Korea. Seaweed communities consisted of a total of 18 species in 3 phyla with biomass of 481.4 g/m2 the barren areas, and a total of 18 species in 3 phyla with 8,259.9 g/m2 in the seaweed forest, where 17.2-fold higher biomass than that in the barren habitats was recorded. Sea urchins tests were with ranges of their diameter from 4.8 to 7.9 cm (monthly mean: 5.5–6.2 cm) in the barren areas and 4.9 to 7.6 cm (monthly 5.3–6.3 cm) in the seaweed forest. Ranges of test heights fell between 2.3 and 4.8 cm (mean 3.0–3.3 cm) in the barren areas, and 1.6 and 4.8 cm (3.0–3.7 cm) in the marine forest areas. Gonad index of sea urchins peaked in September in the barren areas (15.9) and the marine forest areas (25.1), decreased until November (to 3.9 and 4.5, respectively), then increased progressively again from December. Gonad index was 1.6-fold higher in the marine forest areas than that in the barren areas. Despite the region- or water temperature-dependent variations the spawning period is estimated to be from August to November on the east coast and it can be an effective way for scientific sea forest management to remove sea urchins before the spawning period.

참고자료

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