Energy sources for recruitment of the subantarctic copepod Neocalanus tonsus1
Neocalanus tonsus Brady was collected in subantarctic waters off southeastern New Zealand to test experimentally the importance of storage lipids and particulate matter as energy sources for recruitment. Reproductive copepods occur in mesopelagic depths (1,000‐500 m) in austral winter and in epipela...
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Online Access: | http://dx.doi.org/10.4319/lo.1987.32.6.1317 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1987.32.6.1317 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1987.32.6.1317 |
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crwiley:10.4319/lo.1987.32.6.1317 2024-09-15T18:38:01+00:00 Energy sources for recruitment of the subantarctic copepod Neocalanus tonsus1 Ohman, M. D. 1987 http://dx.doi.org/10.4319/lo.1987.32.6.1317 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1987.32.6.1317 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1987.32.6.1317 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 32, issue 6, page 1317-1330 ISSN 0024-3590 1939-5590 journal-article 1987 crwiley https://doi.org/10.4319/lo.1987.32.6.1317 2024-07-18T04:25:50Z Neocalanus tonsus Brady was collected in subantarctic waters off southeastern New Zealand to test experimentally the importance of storage lipids and particulate matter as energy sources for recruitment. Reproductive copepods occur in mesopelagic depths (1,000‐500 m) in austral winter and in epipelagic depths (150‐0 m) in spring. Winter copepods released up to 19 eggs female −1 d −1 in filtered seawater; spring copepods required a particulate food source to release eggs. Winter females ingested diatoms at half the rate of spring females. Winter CVs did not ingest diatoms, in contrast to spring and summer CVs. Winter females had 24 times the wax ester content, half the phospholipid, and half the nitrogen content of spring females. In contrast, the two groups did not differ in dry mass or carbon content. Application of a proposed method for estimating reproductive potential, combined with experimental results, suggests that stored lipids are the energy source for recruitment of mesopelagic winter animals but not epipelagic spring animals. Subantarctic N. tonsus is distinguished from subarctic Pacific Neocalanus plumchrus and Neocalanus cristatus by residence of adult females in surface waters, active suspension feeding, and the dependence of egg production on particulate food in spring. Divergent life history traits may be observed for copepod species occupying parallel subpolar habitats in the southern and northern hemispheres. Article in Journal/Newspaper Subarctic Copepods Wiley Online Library Limnology and Oceanography 32 6 1317 1330 |
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language |
English |
description |
Neocalanus tonsus Brady was collected in subantarctic waters off southeastern New Zealand to test experimentally the importance of storage lipids and particulate matter as energy sources for recruitment. Reproductive copepods occur in mesopelagic depths (1,000‐500 m) in austral winter and in epipelagic depths (150‐0 m) in spring. Winter copepods released up to 19 eggs female −1 d −1 in filtered seawater; spring copepods required a particulate food source to release eggs. Winter females ingested diatoms at half the rate of spring females. Winter CVs did not ingest diatoms, in contrast to spring and summer CVs. Winter females had 24 times the wax ester content, half the phospholipid, and half the nitrogen content of spring females. In contrast, the two groups did not differ in dry mass or carbon content. Application of a proposed method for estimating reproductive potential, combined with experimental results, suggests that stored lipids are the energy source for recruitment of mesopelagic winter animals but not epipelagic spring animals. Subantarctic N. tonsus is distinguished from subarctic Pacific Neocalanus plumchrus and Neocalanus cristatus by residence of adult females in surface waters, active suspension feeding, and the dependence of egg production on particulate food in spring. Divergent life history traits may be observed for copepod species occupying parallel subpolar habitats in the southern and northern hemispheres. |
format |
Article in Journal/Newspaper |
author |
Ohman, M. D. |
spellingShingle |
Ohman, M. D. Energy sources for recruitment of the subantarctic copepod Neocalanus tonsus1 |
author_facet |
Ohman, M. D. |
author_sort |
Ohman, M. D. |
title |
Energy sources for recruitment of the subantarctic copepod Neocalanus tonsus1 |
title_short |
Energy sources for recruitment of the subantarctic copepod Neocalanus tonsus1 |
title_full |
Energy sources for recruitment of the subantarctic copepod Neocalanus tonsus1 |
title_fullStr |
Energy sources for recruitment of the subantarctic copepod Neocalanus tonsus1 |
title_full_unstemmed |
Energy sources for recruitment of the subantarctic copepod Neocalanus tonsus1 |
title_sort |
energy sources for recruitment of the subantarctic copepod neocalanus tonsus1 |
publisher |
Wiley |
publishDate |
1987 |
url |
http://dx.doi.org/10.4319/lo.1987.32.6.1317 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1987.32.6.1317 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1987.32.6.1317 |
genre |
Subarctic Copepods |
genre_facet |
Subarctic Copepods |
op_source |
Limnology and Oceanography volume 32, issue 6, page 1317-1330 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1987.32.6.1317 |
container_title |
Limnology and Oceanography |
container_volume |
32 |
container_issue |
6 |
container_start_page |
1317 |
op_container_end_page |
1330 |
_version_ |
1810482360432459776 |