Larval krill studies - fluorescence and clearance from ARSV Laurence M. Gould LMG0106, LMG0205 in the Southern Ocean from 2001-2002 (SOGLOBEC project)

<p>\"Winter ecology of larval krill: quantifying their interaction with the pack ice habitat\"</p> <p>The goal of the larval krill studies was to investigate the physiology and ecology of krill larvae associated with the pack ice and the microbial community on which they feed.</p> <p>During LMG0106 we occupied two 4-5 day ice stations (Robert and Billy) and sampled several other ice floes opportunistically. We conducted 10 instantaneous growth rate experiments, and 4 whole body clearance time experiments to determine gut passage time (decline in pigment content over time). We also sampled larvae at two additional sites for initial body pigment content (whole body fluorescence), and at 4 sites for condition factor. The under-ice algal community was sampled at one site. Length and stage frequency determinations were also determined.</p> <p>We occupied three time-series stations of approximately 1 week each, and in addition opportunistically sampled at times when other activities had priority. Our primary goal during the cruise was to occupy three ice camps or process stations with the intent of thoroughly studying the under-ice environment by SCUBA in conjunction with other projects working topside. <a href=\"http://www.ccpo.odu.edu/Research/globec/main_cruises02/lmg0205/report_lmg0205.pdf\" target=\"_blank\"><em>(from cruise report LMG0205)</em></a></p><p>幼体磷虾（larval krill）的冬季生态学：量化其与浮冰（pack ice）生境的相互作用</p><p>本幼体磷虾研究的核心目标为探究与浮冰生境及其摄食的微生物群落相关的磷虾幼体生理学与生态学特征。</p><p>在LMG0106航次期间，我们布设了两个为期4至5天的冰站（分别命名为Robert与Billy），并对其他多块浮冰进行了机会性采样。期间共开展10次瞬时生长率实验，以及4次整体清除率实验以测定肠道通过时间（gut passage time，即色素含量随时间的衰减过程）。此外，我们还在2个额外站点采集了磷虾幼体样本以测定其初始体色素含量（整体荧光值），在4个站点测定了幼体的状况因子。同时在1个站点采集了冰下藻类群落样本，并完成了体长与发育阶段频率的统计测定。</p><p>本次航次我们布设了3个为期约1周的时间序列站，并在其他优先开展的作业时段进行了机会性采样。本航次的核心目标为布设3个冰营或作业站，以期通过水肺潜水（SCUBA）结合其他甲板作业项目，对冰下环境开展全面深入的研究。<a href="http://www.ccpo.odu.edu/Research/globec/main_cruises02/lmg0205/report_lmg0205.pdf" target="_blank"><em>(数据源自航次报告LMG0205)</em></a></p>