Peruvian sea catfish (Galeichthys peruvianus) sagittal otoliths preserve a record of modern and mid-Holoene sea surface temperatures (SSTs). Oxygen isotope profiles in otoliths excavated from Ostra [6010±90 years before the present yr B.P.); 8°55′S] indicate that summer SSTs were ～3 deg. C warmer than those of the present. Siches otoliths (6450±110 yr B.P. 4°40′S) recorded mean annual temperatures ～3 deg to 4 deg. C warmer than were measured under modern condi- tions. Trophic level and population diverity and equitability data from these faunal assemblages and other Peruvian archaeological sites support the isotope interpretations and suggest that upwelling of the Peru-Chile current intensified after ～5000 yr B.P.
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机译：秘鲁sea鱼（Galeichthys peruvianus）矢状耳石保存了近现代的和全新世的中海面温度（SST）的记录。从Ostra挖掘出的耳石中的氧同位素分布图[本B.P.前6010±90年）； 8°55′S]表明夏季海表温度约为3度。 C比现在的温度高。耳石（Siches otoliths）（6450±110 yr B.P. 4°40′S）记录的年平均气温为〜3度到4度。比现代条件下测得的温度高。这些动物群和其他秘鲁考古遗址的营养水平，种群多样性和等价性数据支持同位素解释，并表明公元前5,000年后秘鲁-智利流上升趋势增强。
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