Body length, dry and ash-free dry weights, and developmental changes at each copepodid stage in five sympatric mesopelagic aetideid copepods in the western Arctic Ocean
Abstract Aetideid copepods dominate the mesopelagic layer of the Arctic Ocean and play an important role in the vertical material flux and biodiversity. However, little information about the lengths and weights of their copepodids is available. In this study, we collected five sympatric aetideid cop...
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crbrillap:10.1163/15685403-bja10272 2023-06-06T11:50:15+02:00 Body length, dry and ash-free dry weights, and developmental changes at each copepodid stage in five sympatric mesopelagic aetideid copepods in the western Arctic Ocean Koguchi, Yunosuke Tokuhiro, Koki Ashjian, Carin J. Campbell, Robert G. Yamaguchi, Atsushi 2023 http://dx.doi.org/10.1163/15685403-bja10272 https://brill.com/view/journals/cr/96/2/article-p113_2.xml https://brill.com/downloadpdf/journals/cr/96/2/article-p113_2.xml unknown Brill Crustaceana volume 96, issue 2, page 113-129 ISSN 0011-216X 1568-5403 Animal Science and Zoology Aquatic Science journal-article 2023 crbrillap https://doi.org/10.1163/15685403-bja10272 2023-04-14T13:49:09Z Abstract Aetideid copepods dominate the mesopelagic layer of the Arctic Ocean and play an important role in the vertical material flux and biodiversity. However, little information about the lengths and weights of their copepodids is available. In this study, we collected five sympatric aetideid copepods, Chiridius obtusifrons Sars G.O., 1902, Gaetanus tenuispinus (Sars G.O., 1900), Gaetanus brevispinus (Sars G.O., 1900), Aetideopsis multiserrata (Wolfenden, 1904), and Aetideopsis rostrata Sars G.O., 1903, from the Arctic Ocean and examined their body lengths, dry and ash-free dry weights, and developmental growths at each copepodid stage. Highly significant length-weight relationships were obtained among copepodids for all species. Within genera, individuals of the same length were heavier at shallower depths. This may result from the greater nutritional availability to species within genera inhabiting shallower depths. Common to all species, the organic content (ash-free dry weight per dry weight) was high for the early copepodid stages. This may be due to the residual organic content of lipid-rich eggs retained in the non-feeding nauplii. The largest growth in females occurred at C5/C6, whereas the largest growth in males occurred at C4/C5, as determined by moult increment and proportion of growth in weight. These sex differences in weight growth could be due to the degeneration of the feeding appendage and cessation of feeding in C6 males of aetideid copepods. Article in Journal/Newspaper Arctic Arctic Ocean Copepods Brill (via Crossref) Arctic Arctic Ocean Crustaceana 96 2 113 129 |
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language |
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topic |
Animal Science and Zoology Aquatic Science |
spellingShingle |
Animal Science and Zoology Aquatic Science Koguchi, Yunosuke Tokuhiro, Koki Ashjian, Carin J. Campbell, Robert G. Yamaguchi, Atsushi Body length, dry and ash-free dry weights, and developmental changes at each copepodid stage in five sympatric mesopelagic aetideid copepods in the western Arctic Ocean |
topic_facet |
Animal Science and Zoology Aquatic Science |
description |
Abstract Aetideid copepods dominate the mesopelagic layer of the Arctic Ocean and play an important role in the vertical material flux and biodiversity. However, little information about the lengths and weights of their copepodids is available. In this study, we collected five sympatric aetideid copepods, Chiridius obtusifrons Sars G.O., 1902, Gaetanus tenuispinus (Sars G.O., 1900), Gaetanus brevispinus (Sars G.O., 1900), Aetideopsis multiserrata (Wolfenden, 1904), and Aetideopsis rostrata Sars G.O., 1903, from the Arctic Ocean and examined their body lengths, dry and ash-free dry weights, and developmental growths at each copepodid stage. Highly significant length-weight relationships were obtained among copepodids for all species. Within genera, individuals of the same length were heavier at shallower depths. This may result from the greater nutritional availability to species within genera inhabiting shallower depths. Common to all species, the organic content (ash-free dry weight per dry weight) was high for the early copepodid stages. This may be due to the residual organic content of lipid-rich eggs retained in the non-feeding nauplii. The largest growth in females occurred at C5/C6, whereas the largest growth in males occurred at C4/C5, as determined by moult increment and proportion of growth in weight. These sex differences in weight growth could be due to the degeneration of the feeding appendage and cessation of feeding in C6 males of aetideid copepods. |
format |
Article in Journal/Newspaper |
author |
Koguchi, Yunosuke Tokuhiro, Koki Ashjian, Carin J. Campbell, Robert G. Yamaguchi, Atsushi |
author_facet |
Koguchi, Yunosuke Tokuhiro, Koki Ashjian, Carin J. Campbell, Robert G. Yamaguchi, Atsushi |
author_sort |
Koguchi, Yunosuke |
title |
Body length, dry and ash-free dry weights, and developmental changes at each copepodid stage in five sympatric mesopelagic aetideid copepods in the western Arctic Ocean |
title_short |
Body length, dry and ash-free dry weights, and developmental changes at each copepodid stage in five sympatric mesopelagic aetideid copepods in the western Arctic Ocean |
title_full |
Body length, dry and ash-free dry weights, and developmental changes at each copepodid stage in five sympatric mesopelagic aetideid copepods in the western Arctic Ocean |
title_fullStr |
Body length, dry and ash-free dry weights, and developmental changes at each copepodid stage in five sympatric mesopelagic aetideid copepods in the western Arctic Ocean |
title_full_unstemmed |
Body length, dry and ash-free dry weights, and developmental changes at each copepodid stage in five sympatric mesopelagic aetideid copepods in the western Arctic Ocean |
title_sort |
body length, dry and ash-free dry weights, and developmental changes at each copepodid stage in five sympatric mesopelagic aetideid copepods in the western arctic ocean |
publisher |
Brill |
publishDate |
2023 |
url |
http://dx.doi.org/10.1163/15685403-bja10272 https://brill.com/view/journals/cr/96/2/article-p113_2.xml https://brill.com/downloadpdf/journals/cr/96/2/article-p113_2.xml |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Copepods |
genre_facet |
Arctic Arctic Ocean Copepods |
op_source |
Crustaceana volume 96, issue 2, page 113-129 ISSN 0011-216X 1568-5403 |
op_doi |
https://doi.org/10.1163/15685403-bja10272 |
container_title |
Crustaceana |
container_volume |
96 |
container_issue |
2 |
container_start_page |
113 |
op_container_end_page |
129 |
_version_ |
1767956017705910272 |