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ISSN : 1225-3480

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27권 4호

굴, Crassostrea gigas 유생의 먹이생물 섭취 크기

Ingestion size of food microalgae of the Pacific oyster Crassostrea gigas larvae

허영백 (국립수산과학원 남동해수산연구소)
전창영 (국립수산과학원 남동해수산연구소)
조기채 (국립수산과학원 남동해수산연구소)
허성범 (부경대학교 해양바이오신소재학과)
한국패류학회지 / The Korean Journal of Malacology, (P)1225-3480;
2011, v.27 no.4, pp.307-315
https://doi.org/10.9710/kjm.2011.27.4.307
허영백, 전창영, 조기채, & 허성범. (2011). 굴, Crassostrea gigas 유생의 먹이생물 섭취 크기. , 27(4), 307-315, https://doi.org/10.9710/kjm.2011.27.4.307

초록

유생의 발달크기에 따라 미세조류 12종에 대하여 섭취 가능성을 조사한 결과 유생의 크기에 따라 섭취 가능한 미세조류는 많은 차이를 보였다. 전체 유생크기에서 I. galban, I. aff. galbana, P. lutheri, C. ellipsoidea, N. oculata는 94.2-99.7%의 섭취율를 보였고, C. calcitrans, C. gracilis, C. simplex는 평균 각장 $189.3{\pm}13.8{\mu}m$ 크기인 중형 각 정기 이후 90.0% 이상의 섭취율을 보였다. P. triconutum, D. tertiolecta, T. tetrathele는 평균 각장 $65.0-100.0{\mu}m$의 D형 유생은 섭취가 관찰되지 않았지만, 이후 유생에서는 각각 97.3-99.7%, 43.3-99.3%, 48.5-99.3% 섭취하였다. 그러나 T. weissflogii는 평균 각장 $306.2{\pm}14.7{\mu}m$ 이상에서 1.0-1.7%의 섭취율을 보였지만, 전체 유생기동안 그의 섭취가 되지 않았다. 이상의 결과를 이용해 전체 50.0% 이상 섭취 가능한 먹이생물의 세포크기를 조사한 결과, 평균 각장 $102.3{\mu}m$ 이하의 D형 단계는 장축과 단축 모두 $4.6{\mu}m$ 이하, $158.3{\mu}m$ 미만에서는 장축기준으로 $9.3{\mu}m$ 미만까지 섭취가 가능하고, $158.3{\mu}m$ 이상 크기는 단축 기준 $9.3{\mu}m$까지 섭취가 가능한 것으로 나타났다. 전제 유생기 동안 장축과 단축을 포함해서 $10.0{\mu}m$ 이상은 섭취가 되지 않았다.

keywords
Ingestion size, Epifluorescence microscopy, oyster, Crassostrea gigas, microalgae, larval development

Abstract

Digestibility index of 12 phytoplankton species were invested during the larval development sizes. Ingestible size of phytoplankton varied depending on larval sizes: Isochrysis galbana, I. aff. galbana, Pavlova lutheri, Chlorella ellipsoidea, Nannochloris oculata was ingested 94.2-99.7% all larval sizes. Cheatoceros calcitrans, C. gracilis and C. simplex could ingest over 90.0% after umbo stage (mean shell length $189.3{\pm}13.8{\mu}m$). Phaeodactylum triconutum, Dunaliella tertiolecta and Tetraselmis tetrathele could not ingested D-shaped larvae (shell length $65.0-100.0{\mu}m$) but ingested 97.3-99.7%, 43.3-99.3%, 48.5-99.3% after then larval stages, respectively. But Thalassiosira weissflogii was ingested 1.0-1.7% only at full grown stage. Over 50.0% ingestion cell size was D-shape stage larvae with smaller than mean $102.3{\mu}m$ in shell length could ingest phytoplankton with $4.6{\mu}m$ in both major and minor axis and up to $9.3{\mu}m$ in minor axis basis for larger than mean $158.3{\mu}m$ in shell length, respectively. At all larval stages, phytoplankton with larger than $10.0{\mu}m$ in both major and minor axis could not be ingested.

keywords
Ingestion size, Epifluorescence microscopy, oyster, Crassostrea gigas, microalgae, larval development

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