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Seasonal phenology of four dominant copepods in the Pacific sector of the Arctic Ocean: Insights from statistical analyses of sediment trap data
https://nipr.repo.nii.ac.jp/records/15605
https://nipr.repo.nii.ac.jp/records/15605739e1d66-8fb5-4ce5-a1bf-25efcf2bf413
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2019-03-31 | |||||
タイトル | ||||||
タイトル | Seasonal phenology of four dominant copepods in the Pacific sector of the Arctic Ocean: Insights from statistical analyses of sediment trap data | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Seasonal phenology of four dominant copepods in the Pacific sector of the Arctic Ocean: Insights from statistical analyses of sediment trap data | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Generalized additive models | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Calanus hyperboreus | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Metridia longa | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Paraeuchaeta glacialis | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Heterorhabdus norvegicus | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Tokuhiro, Koki
× Tokuhiro, Koki× Abe, Yoshiyuki× Matsuno, Kohei× Onodera, Jonaotaro× Fujiwara, Amane× Harada, Naomi× Hirawake, Toru× Yamaguchi, Atsushi |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | n recent years, marine ecosystems have changed due to the drastic sea ice reduction in the Arctic Ocean, but the relationship between copepod phenology and environmental drivers is unclear. To reveal the relationship, seasonal changes in the flux (abundance of swimmers), population structure, lipid accumulation and gonad maturation of four dominant copepods (Calanus hyperboreus, Metridia longa, Paraeuchaeta glacialis and Heterorhabdus norvegicus) were studied using a sediment trap deployed at a depth of 222 m in the Pacific-Arctic sector from October 2010 to September 2013. C. hyperboreus, mostly comprising copepodid stage 6 females (C6F), exhibited several peaks in flux in spring and autumn. C. hyperboreus C6Fs were dominated by lipid-rich specimens year-round, and gonad development was observed in these samples from February to April. The M. longa flux showed no clear seasonality. Gonad maturation of M. longa C6Fs occurred from February to September. P. glacialis flux exhibited two peaks in autumn of 2011 and 2012. In contrast to the former two species, lipid-rich, mature P. glacialis C6Fs occurred year-round. H. norvegicus copepodid stage 6 males (C6Ms) also occurred throughout the year, likely because H. norvegicus has functional feeding appendages, even in C6Ms. From generalized additive models, C. hyperboreus, M. longa and P. glacialis showed relationships with daytime length and/or sea ice concentrations, but the relationship patterns were different. These findings suggest that the response (e.g., vertical migration) to the environmental parameters could vary with species and the drastic sea ice reductions may affect the copepod phenology in the Pacific-Arctic sector. | |||||
書誌情報 |
en : Polar Science 巻 19, p. 94-111, 発行日 2019-03 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18739652 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.polar.2018.08.006 | |||||
関連名称 | 10.1016/j.polar.2018.08.006 |