Higher ingestion rates and importance of ciliates in the diet of a large, subarctic copepod revealed by larger volume incubations
Higher ingestion rates and importance of ciliates in the diet of a large, subarctic copepod revealed by larger volume incubations
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较大体积的孵化揭示了纤毛虫在大型亚北极桡足类饮食中的较高摄入率和重要性
DOI:
10.1002/lno.12310
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发表时间:
2023
影响因子:
4.5
通讯作者:
Nishibe Yuichiro
中科院分区:
文献类型:
--
作者:
Takahashi Kazutaka;Ichinomiya Mutsuo;Okazaki Yuji;Nishibe Yuichiro
Despite ecological importance, the feeding ecology of the large calanoid copepod,Neocalanus cristatusis little known, as its ingestion rate under experimental conditions consistently falls short of its metabolic demand. The conventional incubation bottle size (~ 2 liters) used in previous studies may have affected its feeding behavior. Here, we examined the effect of bottle size (2.4 vs. 13liters) and copepod density on the feeding ofN. cristatusStage C5. Under similar copepod density (0.4 ind. L−1) ingestion rates decreased significantly for tests conducted in small bottles and thus, small bottles inhibited copepod feeding. In experiments with large bottles, ingestion rates were highest in the single‐individual treatments (1 ind. 13 L−1), decreasing exponentially to < 1% of the maximum ingestion rate with increasing copepod densities (up to 20 ind. 13 L−1). Considerable food limitation occurred in the higher copepod density treatments with lower initial prey allocation per individual. Moreover, in the single‐individual treatments, clearance rates on naked ciliates (11–20 L ind.−1d−1) were remarkably higher than in multiple‐individual treatments. Grazer–grazer interaction, thus, interfered with copepod feeding on microzooplankton in multiple‐individual treatments. The ingestion rate in the single‐individual treatments (62–102μgC ind.−1d−1) exceeded the daily metabolic requirement; feeding rates noted in previous studies were, thus, underestimations, affected by bottle size and copepod mutual interference. Efficient feeding byN. cristatuson naked ciliates emphasizes the importance of the ciliate‐copepod link in the grazing food chain in the subarctic Pacific.
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影响因子:
1.5
作者:
M. Landry;V. Fagerness
通讯作者:
V. Fagerness
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
B. W. Frost;M. Landry;R. P. Hassett
通讯作者:
R. P. Hassett
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
A. Tsuda;H. Sugisaki;T. Ishimaru;T. Saino;T. Sato
通讯作者:
T. Sato
影响因子:
2.3
作者:
K. Nagasawa;S. Ohtsuka;Seiji Saeki;S. Ohtani;G. Zhu;A. Shiomoto
通讯作者:
A. Shiomoto
影响因子:
3.3
作者:
Hongbin Liu;M. Dagg;J. Napp;R. Sato
通讯作者:
R. Sato