Energetics of the Adults and Larvae of the Antarctic Krill Euphausia superba

南极磷虾成虫和幼虫的能量学

• 批准号: 9117633
• 负责人: Langdon Quetin
• 金额: $ 34.12万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-07-01 至 1996-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117633&HistoricalAwards=false
• 关键词: Energetics; Adults; Larvae; Antarctic; Krill

This research on the energetics of the adults and larvae of the Antarctic krill, Euphausia superba, is focused on quantification of the role of ice biota in winter-over survival of krill larvae. Observed interannual differences in physiological condition of the larvae during the winter could lead to differences in survival of the young-of-the-year, and thus in the strength of any one year class. Processes underlying such differences during early and late winter will be studied. Low food availability in the fall after the summer phytoplankton blooms suggests that larvae in early winter will have experienced several months of near starvation conditions. Without an additional food source such as ice biota in the underside of the sea ice these larvae may not survive the winter. However, larvae under the ice in late winter of a heavy ice year will have had this additional food source, and may be in better physiological condition than the beginning of the winter. Environmental conditions in open water and under ice will be compared and will be sampled to determine their physiological condition. The nutritional contribution of the ice biota to total energy demand of the larvae on two month-long cruises to the Southern Ocean will be quantified. The proposed research will address several significant questions about the winter-over energetics of larval krill, in particular the role of ice biota in winter-over survival and subsequent recruitment.

本研究对黑腹小蠹成虫和幼虫的能量学进行了研究， 南极磷虾，Euphausia superba， 冰生物群在磷虾幼虫越冬存活中的作用。 观察到的生理状况的年际差异 冬季的幼虫会导致 在这一年中的生存，因此在力量 任何一年的课。 这些差异背后的过程 将研究早冬和晚冬。 粮食供应不足， 夏季浮游植物大量繁殖后的秋季表明， 初冬的幼虫会经历几个月的 接近饥饿状态。 如果没有额外的食物来源 比如海冰下面的冰生物群这些幼虫 可能熬不过冬天 然而，冰下的幼虫 在一个重冰年的冬末， 食物来源，并且可能处于比 冬天的开始。 开放环境条件 水和冰下将进行比较，并将取样， 确定他们的生理状况。 营养 冰生物群对南极洲总能源需求的贡献 在为期两个月的南大洋航行中， 量化。 该研究将解决几个问题。 幼虫越冬能量学的重要问题 磷虾，特别是冰生物群在越冬中的作用 生存和随后的招募。