Zooplankton growth rates: the larvaceans Appendicularia, Fritillaria and Oikopleura in tropical waters
Zooplankton growth rates: the larvaceans Appendicularia, Fritillaria and Oikopleura in tropical waters
复制标题
浮游动物生长率：热带水域的幼虫 Appendillaryia、Fritillaria 和 Oikopleura
DOI：
10.1093/plankt/20.3.539
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发表时间：
1998
影响因子：
2.1
通讯作者：
H. Bouman
中科院分区：
文献类型：
--
作者：
R. Hopcroft;J. Roff;H. Bouman
在牙买加水域28°C原位培养的微生态环境中，测定了长尾贝母、北贝母马尾贝母、单瘤贝母、长尾贝母和长尾贝母的生长速率。通过中营养化石灰滩和富营养化金斯敦港，在贫营养化近海水域进行了自然和富营养化浮游植物群落的实验。计算了其中两个物种的长重关系：o.l icicauda log W = 2.47 log TL 6.10和f.h haplostoma log W = 2.44 log TL 7.37，其中重(W)的单位是微克，干长（TL）的单位是微米。瞬时生长速率平均为1.7-2.5天*，最高可达3.3天*。这些瞬时速率相当于每日特定生长率，平均为4.6-11.4，最高可达28。在较大的属中，生长速率与微浮游生物和纳米浮游生物浓度呈正相关，与幼虫生物量呈负相关，但在最小的种中，生长速率与这些因素无关。然而，由于这两个因素在微观环境中的变异性超过了它们的自然变异性范围，幼虫的生长速度通常可能受到资源或种群密度效应的限制。
The growth rates of Appendicularia sicula, Fritillaria borealis sargassi, Fritillaria haplostoma, Oikopleura dioica and Oikopleura longicauda were determined from microcosms incubated in situ at 28°C in Jamaican waters. Experiments were conducted from oligotrophic offshore waters, through mesotrophic Lime Cay and eutrophic Kingston Harbour in both natural and nutrientenhanced phytoplankton communities. Length-weight relationships were calculated for two of these species: O.longicauda log W = 2.47 log TL 6.10 and F.haplostoma log W = 2.44 log TL 7.37, where weight (W) is in micrograms and trunk length (TL) is in micrometres. Instantaneous growth rates averaged 1.7-2.5 day* for the five species and were observed as high as 3.3 day-'. These instantaneous rates are equivalent to daily specific growth rates averaging 4.6-11.4 and ranging up to 28. In larger genera, growth rates were related positively to picoplankton and nanoplankton concentration, and negatively to the biomass of larvaceans, but in the smallest species growth was unrelated to these factors. However, because the variability in these two factors within microcosms exceeded their natural range of variability, growth rates of larvaceans may normally be unlimited by resources or population density effects.