Estimating the scale of fish feeding movements in rivers using δ 13 Csignature gradients
Summary Isotopic signatures of consumers provide a time integration of their feeding history, and as a result of movements, are often out of line with signatures of their local resources. Such disequilibrium can be useful for inferring the spatial scale of consumer movement. δ 13 C signatures of dis...
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crwiley:10.1111/j.1365-2656.2008.01511.x 2024-06-23T07:51:24+00:00 Estimating the scale of fish feeding movements in rivers using δ 13 Csignature gradients Rasmussen, Joseph B. Trudeau, Veronique Morinville, Genevieve 2009 http://dx.doi.org/10.1111/j.1365-2656.2008.01511.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2656.2008.01511.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2656.2008.01511.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Animal Ecology volume 78, issue 3, page 674-685 ISSN 0021-8790 1365-2656 journal-article 2009 crwiley https://doi.org/10.1111/j.1365-2656.2008.01511.x 2024-06-04T06:44:36Z Summary Isotopic signatures of consumers provide a time integration of their feeding history, and as a result of movements, are often out of line with signatures of their local resources. Such disequilibrium can be useful for inferring the spatial scale of consumer movement. δ 13 C signatures of dissolved inorganic carbon as well as periphyton and invertebrates, exhibit pronounced gradients along rivers. We outline an analytical framework to estimate the spatial scale of movement of riverine fish by comparing the slopes of their δ 13 C signature gradients to that of the stream invertebrates they consume. For free‐ranging juvenile Atlantic salmon ( Salmo salar L.), unconstrained by barriers, δ 13 C signatures departed considerably from invertebrate signatures, and along‐stream slopes were as little as half those recorded for stream invertebrates. Movement estimates for these fish, based on their signature slopes, are ~20 km. By contrast, stream resident salmonids (whose movements are constrained by physical barriers) and sedentary taxa such as sculpins and sticklebacks, have carbon signatures much closer to invertebrate signatures where they were collected. For these groups, our method yields negligible estimates of movement, similar to those of invertebrates. Although this method cannot provide precise estimates of how much individual organisms move, or reveal details of movement history, it may provide an effective complement to telemetric and other methods of studying movement. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Animal Ecology 78 3 674 685 |
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Wiley Online Library |
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English |
description |
Summary Isotopic signatures of consumers provide a time integration of their feeding history, and as a result of movements, are often out of line with signatures of their local resources. Such disequilibrium can be useful for inferring the spatial scale of consumer movement. δ 13 C signatures of dissolved inorganic carbon as well as periphyton and invertebrates, exhibit pronounced gradients along rivers. We outline an analytical framework to estimate the spatial scale of movement of riverine fish by comparing the slopes of their δ 13 C signature gradients to that of the stream invertebrates they consume. For free‐ranging juvenile Atlantic salmon ( Salmo salar L.), unconstrained by barriers, δ 13 C signatures departed considerably from invertebrate signatures, and along‐stream slopes were as little as half those recorded for stream invertebrates. Movement estimates for these fish, based on their signature slopes, are ~20 km. By contrast, stream resident salmonids (whose movements are constrained by physical barriers) and sedentary taxa such as sculpins and sticklebacks, have carbon signatures much closer to invertebrate signatures where they were collected. For these groups, our method yields negligible estimates of movement, similar to those of invertebrates. Although this method cannot provide precise estimates of how much individual organisms move, or reveal details of movement history, it may provide an effective complement to telemetric and other methods of studying movement. |
format |
Article in Journal/Newspaper |
author |
Rasmussen, Joseph B. Trudeau, Veronique Morinville, Genevieve |
spellingShingle |
Rasmussen, Joseph B. Trudeau, Veronique Morinville, Genevieve Estimating the scale of fish feeding movements in rivers using δ 13 Csignature gradients |
author_facet |
Rasmussen, Joseph B. Trudeau, Veronique Morinville, Genevieve |
author_sort |
Rasmussen, Joseph B. |
title |
Estimating the scale of fish feeding movements in rivers using δ 13 Csignature gradients |
title_short |
Estimating the scale of fish feeding movements in rivers using δ 13 Csignature gradients |
title_full |
Estimating the scale of fish feeding movements in rivers using δ 13 Csignature gradients |
title_fullStr |
Estimating the scale of fish feeding movements in rivers using δ 13 Csignature gradients |
title_full_unstemmed |
Estimating the scale of fish feeding movements in rivers using δ 13 Csignature gradients |
title_sort |
estimating the scale of fish feeding movements in rivers using δ 13 csignature gradients |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1111/j.1365-2656.2008.01511.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2656.2008.01511.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2656.2008.01511.x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Animal Ecology volume 78, issue 3, page 674-685 ISSN 0021-8790 1365-2656 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2656.2008.01511.x |
container_title |
Journal of Animal Ecology |
container_volume |
78 |
container_issue |
3 |
container_start_page |
674 |
op_container_end_page |
685 |
_version_ |
1802642490068566016 |