Integrative measures of consumption rates in salmon: expansion and application of a trace element approach
Summary Establishing reliable estimates of consumption is necessary for understanding the physiology, bioenergetics and trophic relationships of organisms. For fish, the inability to measure consumption directly prevents a mechanistic understanding of habitat–foraging relationships. Building upon es...
Published in: | Journal of Applied Ecology |
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crwiley:10.1111/j.0021-8901.2004.00956.x 2024-06-02T08:03:43+00:00 Integrative measures of consumption rates in salmon: expansion and application of a trace element approach KENNEDY, BRIAN P. KLAUE, BJOERN BLUM, JOEL D. FOLT, CAROL L. 2004 http://dx.doi.org/10.1111/j.0021-8901.2004.00956.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.0021-8901.2004.00956.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.0021-8901.2004.00956.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Applied Ecology volume 41, issue 5, page 1009-1020 ISSN 0021-8901 1365-2664 journal-article 2004 crwiley https://doi.org/10.1111/j.0021-8901.2004.00956.x 2024-05-03T10:58:16Z Summary Establishing reliable estimates of consumption is necessary for understanding the physiology, bioenergetics and trophic relationships of organisms. For fish, the inability to measure consumption directly prevents a mechanistic understanding of habitat–foraging relationships. Building upon established models for 137 caesium (Cs) mass balance in fish, we used natural abundances of a stable geologically derived isotope of Cs to estimate consumption rates over the first growing season for Atlantic salmon Salmo salar and to derive a general model that provides integrative estimates of consumption rates for individuals of all sizes. To test the reliability of the trace metal approach we (i) performed a sensitivity analysis of model parameters and (ii) parameterized the model with site‐specific data, including gut contents, Cs concentrations of invertebrate prey and assimilation rates. We applied the method in two sites to make the first in situ determinations of consumption rates of individual age‐0 salmon at post‐larval and fry stages, for fish as small as 0·1 g. Consumption estimates were most responsive to changes in three parameters: Cs body burdens, Cs concentration in prey items and assimilation efficiency, all of which could be measured with high precision using inductively coupled plasma mass spectrometry. The assimilation efficiency of Cs measured on field‐caught age‐0 salmon was approximately 60%. Consumption rates at 2 weeks post‐stocking were highly variable in both sites, ranging from no detectable consumption to 8·5% fresh weight (fw) day −1 . By the end of the growing season, consumption rates were less variable (2–4% fw day −1 ). Synthesis and applications. This study is the first to demonstrate that background levels of geologically derived Cs can be used to estimate consumption rates of fish. Our results show that extremely low consumption rates during the first 6 weeks of life correspond closely with the critical survival period in other fish populations, and suggest a mechanism for a ... Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Applied Ecology 41 5 1009 1020 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Summary Establishing reliable estimates of consumption is necessary for understanding the physiology, bioenergetics and trophic relationships of organisms. For fish, the inability to measure consumption directly prevents a mechanistic understanding of habitat–foraging relationships. Building upon established models for 137 caesium (Cs) mass balance in fish, we used natural abundances of a stable geologically derived isotope of Cs to estimate consumption rates over the first growing season for Atlantic salmon Salmo salar and to derive a general model that provides integrative estimates of consumption rates for individuals of all sizes. To test the reliability of the trace metal approach we (i) performed a sensitivity analysis of model parameters and (ii) parameterized the model with site‐specific data, including gut contents, Cs concentrations of invertebrate prey and assimilation rates. We applied the method in two sites to make the first in situ determinations of consumption rates of individual age‐0 salmon at post‐larval and fry stages, for fish as small as 0·1 g. Consumption estimates were most responsive to changes in three parameters: Cs body burdens, Cs concentration in prey items and assimilation efficiency, all of which could be measured with high precision using inductively coupled plasma mass spectrometry. The assimilation efficiency of Cs measured on field‐caught age‐0 salmon was approximately 60%. Consumption rates at 2 weeks post‐stocking were highly variable in both sites, ranging from no detectable consumption to 8·5% fresh weight (fw) day −1 . By the end of the growing season, consumption rates were less variable (2–4% fw day −1 ). Synthesis and applications. This study is the first to demonstrate that background levels of geologically derived Cs can be used to estimate consumption rates of fish. Our results show that extremely low consumption rates during the first 6 weeks of life correspond closely with the critical survival period in other fish populations, and suggest a mechanism for a ... |
format |
Article in Journal/Newspaper |
author |
KENNEDY, BRIAN P. KLAUE, BJOERN BLUM, JOEL D. FOLT, CAROL L. |
spellingShingle |
KENNEDY, BRIAN P. KLAUE, BJOERN BLUM, JOEL D. FOLT, CAROL L. Integrative measures of consumption rates in salmon: expansion and application of a trace element approach |
author_facet |
KENNEDY, BRIAN P. KLAUE, BJOERN BLUM, JOEL D. FOLT, CAROL L. |
author_sort |
KENNEDY, BRIAN P. |
title |
Integrative measures of consumption rates in salmon: expansion and application of a trace element approach |
title_short |
Integrative measures of consumption rates in salmon: expansion and application of a trace element approach |
title_full |
Integrative measures of consumption rates in salmon: expansion and application of a trace element approach |
title_fullStr |
Integrative measures of consumption rates in salmon: expansion and application of a trace element approach |
title_full_unstemmed |
Integrative measures of consumption rates in salmon: expansion and application of a trace element approach |
title_sort |
integrative measures of consumption rates in salmon: expansion and application of a trace element approach |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1111/j.0021-8901.2004.00956.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.0021-8901.2004.00956.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.0021-8901.2004.00956.x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Applied Ecology volume 41, issue 5, page 1009-1020 ISSN 0021-8901 1365-2664 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.0021-8901.2004.00956.x |
container_title |
Journal of Applied Ecology |
container_volume |
41 |
container_issue |
5 |
container_start_page |
1009 |
op_container_end_page |
1020 |
_version_ |
1800748330719903744 |