@article{oai:nipr.repo.nii.ac.jp:00010235, author = {Giraldo, Carolina and Cherel, Yves and Vallet, Carole and Mayzaud, Patrick and Tavernier, Eric and Moteki, Masato and Hosie, Graham and Koubbi, Philippe and Giraldo, Carolina and Cherel, Yves and Vallet, Carole and Mayzaud, Patrick and Tavernier, Eric and Moteki, Masato and Hosie, Graham and Koubbi, Philippe}, issue = {2}, journal = {Polar science, Polar science}, month = {Aug}, note = {The feeding ecology of the notothenioid fish Pleuragramma antarcticum was studied in the Dumont d'Urville Sea (East Antarctica) near the French Antarctic station. Stable isotopes (δ13C and δ15N) and diet contents were used in order to study dietary shifts between fish larvae and juveniles. All specimens had low δ13C values (<−24‰), a main characteristic of high-Antarctic pelagic species. Fish larvae showed differences in both carbon and nitrogen ratios when compared with juveniles. Muscle δ15N values showed a difference of one trophic level ( 3‰) between larvae (6.7‰) and juveniles (9.7–10.0‰) and a trophic position of tertiary consumers. Diet content analyses (stereomicroscope and scanning electron microscopes) indicated that larvae are omnivorous, feeding on phytoplankton (mainly diatoms) as well as on zooplankton species. A positive relationship between δ15N values and size was found and indicated a carnivorous diet for older specimens., 安定同位体と消化管内容物の解析から,コオリイワシ(ノトセニア科)の仔魚期から稚魚期にかけての餌組成の変化を明らかにした。すべての標本は,High-Antarctic zoneでの中層性魚類の特徴のひとつである,低いδ13C値(< -24‰)を示した。筋肉のδ15N値は仔魚と稚魚で栄養段階が一つ異なることを示した。餌生物解析の結果,仔魚は雑食性で動物プランクトンのほか植物プランクトン(おもに珪藻類)を食べていた。δ15N値と体長の間で正の相関が認められ,成長に伴い動物プランクトン食へ移行することが示された。}, pages = {252--263}, title = {Ontogenic changes in the feeding ecology of the early life stages of the Antarctic silverfish (Pleuragramma antarcticum) documented by stable isotopes and diet analysis in the Dumont d'Urville Sea (East Antarctica)}, volume = {5}, year = {2011} }