Characterization of the pelagic ecosystem in surface waters of the northern Gulf of St, Lawrence in early summer: the larval redfish‐Calanus‐microplankton interaction
ABSTRACT In June 1989, the water column along a transect in the north‐central Gulf of St Lawrence was thermally stratified (10–14 o C at the surface; 0‐l o C at 30 m). In the surface layer, nitrate and chlorophyll concentrations were very low; the mean concentration of chlorophyll a > 5 μm in the...
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Language: | English |
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1996
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Online Access: | http://dx.doi.org/10.1111/j.1365-2419.1996.tb00014.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2419.1996.tb00014.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2419.1996.tb00014.x |
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crwiley:10.1111/j.1365-2419.1996.tb00014.x 2024-06-02T08:04:43+00:00 Characterization of the pelagic ecosystem in surface waters of the northern Gulf of St, Lawrence in early summer: the larval redfish‐Calanus‐microplankton interaction RUNGE, JEFFREY A. LAFONTAINE, YVES DE 1996 http://dx.doi.org/10.1111/j.1365-2419.1996.tb00014.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2419.1996.tb00014.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2419.1996.tb00014.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fisheries Oceanography volume 5, issue 1, page 21-37 ISSN 1054-6006 1365-2419 journal-article 1996 crwiley https://doi.org/10.1111/j.1365-2419.1996.tb00014.x 2024-05-03T10:36:28Z ABSTRACT In June 1989, the water column along a transect in the north‐central Gulf of St Lawrence was thermally stratified (10–14 o C at the surface; 0‐l o C at 30 m). In the surface layer, nitrate and chlorophyll concentrations were very low; the mean concentration of chlorophyll a > 5 μm in the subsurface maximum was 0.26 μg1 ‐1 . Autotrophic and (presumably) heterotrophic flagellates and dinoflagellates were the most abundant micro‐plankton. In this system, redfish ( Sebastes spp.) larvae and the planktonic copepod Calanus finmarchicus overwhelmingly dominated the ichthyoplankton and zoo‐plankton, respectively. Redfish larvae, Calanus females and Calanus eggs were most abundant in the surface layer (0–25 m) day and night. Daily specific egg production rates of Calanus , calculated from shipboard incubations of females, approached the predicted maximal level for this species at the ambient temperature of the surface layer, indicating no or little food limitation. The redfish larvae were feeding almost exclusively on the Calanus eggs and were found in greatest abundance along the transect where Calanus egg production rates (eggs m ‐2 day ‐1 ), calculated from the product of the specific egg production rate and female concentration, were highest. The mono‐specificity of the larval redfish diet and the codom‐ Article in Journal/Newspaper Calanus finmarchicus Wiley Online Library Fisheries Oceanography 5 1 21 37 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT In June 1989, the water column along a transect in the north‐central Gulf of St Lawrence was thermally stratified (10–14 o C at the surface; 0‐l o C at 30 m). In the surface layer, nitrate and chlorophyll concentrations were very low; the mean concentration of chlorophyll a > 5 μm in the subsurface maximum was 0.26 μg1 ‐1 . Autotrophic and (presumably) heterotrophic flagellates and dinoflagellates were the most abundant micro‐plankton. In this system, redfish ( Sebastes spp.) larvae and the planktonic copepod Calanus finmarchicus overwhelmingly dominated the ichthyoplankton and zoo‐plankton, respectively. Redfish larvae, Calanus females and Calanus eggs were most abundant in the surface layer (0–25 m) day and night. Daily specific egg production rates of Calanus , calculated from shipboard incubations of females, approached the predicted maximal level for this species at the ambient temperature of the surface layer, indicating no or little food limitation. The redfish larvae were feeding almost exclusively on the Calanus eggs and were found in greatest abundance along the transect where Calanus egg production rates (eggs m ‐2 day ‐1 ), calculated from the product of the specific egg production rate and female concentration, were highest. The mono‐specificity of the larval redfish diet and the codom‐ |
format |
Article in Journal/Newspaper |
author |
RUNGE, JEFFREY A. LAFONTAINE, YVES DE |
spellingShingle |
RUNGE, JEFFREY A. LAFONTAINE, YVES DE Characterization of the pelagic ecosystem in surface waters of the northern Gulf of St, Lawrence in early summer: the larval redfish‐Calanus‐microplankton interaction |
author_facet |
RUNGE, JEFFREY A. LAFONTAINE, YVES DE |
author_sort |
RUNGE, JEFFREY A. |
title |
Characterization of the pelagic ecosystem in surface waters of the northern Gulf of St, Lawrence in early summer: the larval redfish‐Calanus‐microplankton interaction |
title_short |
Characterization of the pelagic ecosystem in surface waters of the northern Gulf of St, Lawrence in early summer: the larval redfish‐Calanus‐microplankton interaction |
title_full |
Characterization of the pelagic ecosystem in surface waters of the northern Gulf of St, Lawrence in early summer: the larval redfish‐Calanus‐microplankton interaction |
title_fullStr |
Characterization of the pelagic ecosystem in surface waters of the northern Gulf of St, Lawrence in early summer: the larval redfish‐Calanus‐microplankton interaction |
title_full_unstemmed |
Characterization of the pelagic ecosystem in surface waters of the northern Gulf of St, Lawrence in early summer: the larval redfish‐Calanus‐microplankton interaction |
title_sort |
characterization of the pelagic ecosystem in surface waters of the northern gulf of st, lawrence in early summer: the larval redfish‐calanus‐microplankton interaction |
publisher |
Wiley |
publishDate |
1996 |
url |
http://dx.doi.org/10.1111/j.1365-2419.1996.tb00014.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2419.1996.tb00014.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2419.1996.tb00014.x |
genre |
Calanus finmarchicus |
genre_facet |
Calanus finmarchicus |
op_source |
Fisheries Oceanography volume 5, issue 1, page 21-37 ISSN 1054-6006 1365-2419 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2419.1996.tb00014.x |
container_title |
Fisheries Oceanography |
container_volume |
5 |
container_issue |
1 |
container_start_page |
21 |
op_container_end_page |
37 |
_version_ |
1800749361170219008 |