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首页> 外文期刊>Polar biology >Trophic ecology of Calanoides acutus in Gerlache Strait and Bellingshausen Sea waters (Antarctica, December 2002)
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Trophic ecology of Calanoides acutus in Gerlache Strait and Bellingshausen Sea waters (Antarctica, December 2002)

机译：Gerlache海峡和Bellingshausen海水中Calanoides acutus的营养生态（南极洲，2002年12月）

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摘要

We measured ingestion rates of Calanoides acutus on different microbial components of the Gerlache Strait (GE) and Bellingshausen Sea (BE) waters during December 2002. At the time of the study the abundance of both zooplankton (42-133 ind m~(-3) and phytoplankton (0.76-1.5 μg chlorophyll a l~(-1)) were low, indicating that the spring phytoplankton bloom was still not fully developed. C. acutus showed high clearance rates along the study (up to 432 ml ind~(-1) day~(-1)), selecting for large motile organisms such as ciliates and the dinoflagellate Gyrodinium spp., although their feeding impact was always < 0.1 % of the standing stock of any of their prey. The total daily rations were low (～2% body carbon per day), mostly the result of phytoplankton consumption (except for station GE3 in which heterotrophic flagellates contributed to 73% of the diet), and barely enough to cover metabolic demands. Based on the relationship between oxygen (carbon) consumption and ammonia excretion (considered as indicative of the metabolic substrate) it seems that standard metabolic demands were supplied, apart from the diet, by the use of their own non-structural proteins, whereas the remaining reserve-lipids were used to produce eggs.
机译：我们在2002年12月期间测量了Calanoides acutus在Gerlache海峡（GE）和Bellingshausen海（BE）水域不同微生物成分上的摄入率。在研究时，两种浮游动物的丰度（42-133 ind m〜（-3 ）和浮游植物（0.76-1.5μg叶绿素al〜（-1））较低，表明春季浮游植物的花开仍未完全发育。黄cut鱼在研究期间显示出较高的清除率（高达432 ml ind〜（- 1）天〜（-1）），选择大型活动生物，例如纤毛虫和鞭毛鞭毛藻，尽管它们的摄食影响总是小于任何猎物站立种群的0.1％，但每日总定量较低（每天约2％的身体碳），主要是浮游植物消耗的结果（GE3站除外，其中异养鞭毛虫占饮食的73％），勉强能满足新陈代谢的需求。基于氧气（碳）消耗量和氨气排泄量（考虑ed作为代谢底物的指示），似乎除了饮食以外，还通过使用自身的非结构蛋白来满足标准的代谢需求，而剩余的储备脂质则用于生产卵。

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