Contrasting intra-individual variation in size-based trophic and habitat shifts for two coastal Arctic fish species
Within and among species variation in trophic and habitat shifts with body size can indicate the potential adaptive capacity of species to ecosystem change. In Arctic coastal ecosystems, which experience dramatic seasonal shifts and are undergoing rapid change, quantifying the trophic flexibility of...
Published in: | Oecologia |
---|---|
Main Authors: | , , , , , |
Format: | Text |
Language: | unknown |
Published: |
Scholarship at UWindsor
2023
|
Subjects: | |
Online Access: | https://scholar.uwindsor.ca/ibiopub/164 https://doi.org/10.1007/s00442-023-05423-9 https://scholar.uwindsor.ca/context/ibiopub/article/1163/viewcontent/s00442_023_05423_9.pdf |
id |
ftunivwindsor:oai:scholar.uwindsor.ca:ibiopub-1163 |
---|---|
record_format |
openpolar |
spelling |
ftunivwindsor:oai:scholar.uwindsor.ca:ibiopub-1163 2024-06-23T07:49:09+00:00 Contrasting intra-individual variation in size-based trophic and habitat shifts for two coastal Arctic fish species Pettitt-Wade, Harri Hussey, Nigel E. Gallagher, Colin P. Lea, Ellen V. Orrell, Danielle L. Loseto, Lisa L. 2023-07-01T07:00:00Z application/pdf https://scholar.uwindsor.ca/ibiopub/164 https://doi.org/10.1007/s00442-023-05423-9 https://scholar.uwindsor.ca/context/ibiopub/article/1163/viewcontent/s00442_023_05423_9.pdf unknown Scholarship at UWindsor https://scholar.uwindsor.ca/ibiopub/164 doi:10.1007/s00442-023-05423-9 https://scholar.uwindsor.ca/context/ibiopub/article/1163/viewcontent/s00442_023_05423_9.pdf http://creativecommons.org/licenses/by/4.0/ Integrative Biology Publications Arctic char Dietary shift Greenland cod Individual specialization Stable isotopes Integrative Biology text 2023 ftunivwindsor https://doi.org/10.1007/s00442-023-05423-9 2024-06-04T14:21:51Z Within and among species variation in trophic and habitat shifts with body size can indicate the potential adaptive capacity of species to ecosystem change. In Arctic coastal ecosystems, which experience dramatic seasonal shifts and are undergoing rapid change, quantifying the trophic flexibility of coastal fishes with different migratory tactics has received limited attention. We examined the relationships among body length and condition (Fulton’s K, phase angle from Bioelectrical Impedance Analysis) with trophic and habitat shifts (differences in δ15N and δ13C between blood tissues with different turnover rates) of two abundant and culturally important species, anadromous Arctic char (Salvelinus alpinus, n = 38) and sedentary Greenland cod (Gadus ogac, n = 65) during summer in coastal marine waters near Ulukhaktok, Northwest Territories, Canada. Habitat shifts (δ13C) increased with length (i.e., pelagic to benthic-littoral) and crossed-equilibrium (zero) at mid-sizes for both species. Seasonal trophic shifts (δ15N) were generally positive (i.e., increasing trophic level) for Arctic char and negative for Greenland cod. As hypothesised, intra-individual variation in size-based trophic shifts (δ15N-length residuals) increased with length for Arctic char. However, there were no trends with length in Greenland cod. Our findings highlight the importance of flexibility through ontogeny and mobility for Arctic char, whereas Greenland cod were generalist to localized prey and habitat across all sizes. The significant effect of body condition (phase angle) on size-based trophic shifts in Arctic char, and size-based habitat shifts in Greenland cod, highlight the potential trade-offs of contrasting life history strategies and capacity for ontogenetic niche plasticity. Text Arctic Gadus ogac Greenland Greenland cod Northwest Territories Salvelinus alpinus Ulukhaktok University of Windsor, Ontario: Scholarship at UWindsor Arctic Northwest Territories Canada Greenland Ulukhaktok ENVELOPE(-117.772,-117.772,70.736,70.736) Oecologia 202 3 601 616 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
Arctic char Dietary shift Greenland cod Individual specialization Stable isotopes Integrative Biology |
spellingShingle |
Arctic char Dietary shift Greenland cod Individual specialization Stable isotopes Integrative Biology Pettitt-Wade, Harri Hussey, Nigel E. Gallagher, Colin P. Lea, Ellen V. Orrell, Danielle L. Loseto, Lisa L. Contrasting intra-individual variation in size-based trophic and habitat shifts for two coastal Arctic fish species |
topic_facet |
Arctic char Dietary shift Greenland cod Individual specialization Stable isotopes Integrative Biology |
description |
Within and among species variation in trophic and habitat shifts with body size can indicate the potential adaptive capacity of species to ecosystem change. In Arctic coastal ecosystems, which experience dramatic seasonal shifts and are undergoing rapid change, quantifying the trophic flexibility of coastal fishes with different migratory tactics has received limited attention. We examined the relationships among body length and condition (Fulton’s K, phase angle from Bioelectrical Impedance Analysis) with trophic and habitat shifts (differences in δ15N and δ13C between blood tissues with different turnover rates) of two abundant and culturally important species, anadromous Arctic char (Salvelinus alpinus, n = 38) and sedentary Greenland cod (Gadus ogac, n = 65) during summer in coastal marine waters near Ulukhaktok, Northwest Territories, Canada. Habitat shifts (δ13C) increased with length (i.e., pelagic to benthic-littoral) and crossed-equilibrium (zero) at mid-sizes for both species. Seasonal trophic shifts (δ15N) were generally positive (i.e., increasing trophic level) for Arctic char and negative for Greenland cod. As hypothesised, intra-individual variation in size-based trophic shifts (δ15N-length residuals) increased with length for Arctic char. However, there were no trends with length in Greenland cod. Our findings highlight the importance of flexibility through ontogeny and mobility for Arctic char, whereas Greenland cod were generalist to localized prey and habitat across all sizes. The significant effect of body condition (phase angle) on size-based trophic shifts in Arctic char, and size-based habitat shifts in Greenland cod, highlight the potential trade-offs of contrasting life history strategies and capacity for ontogenetic niche plasticity. |
format |
Text |
author |
Pettitt-Wade, Harri Hussey, Nigel E. Gallagher, Colin P. Lea, Ellen V. Orrell, Danielle L. Loseto, Lisa L. |
author_facet |
Pettitt-Wade, Harri Hussey, Nigel E. Gallagher, Colin P. Lea, Ellen V. Orrell, Danielle L. Loseto, Lisa L. |
author_sort |
Pettitt-Wade, Harri |
title |
Contrasting intra-individual variation in size-based trophic and habitat shifts for two coastal Arctic fish species |
title_short |
Contrasting intra-individual variation in size-based trophic and habitat shifts for two coastal Arctic fish species |
title_full |
Contrasting intra-individual variation in size-based trophic and habitat shifts for two coastal Arctic fish species |
title_fullStr |
Contrasting intra-individual variation in size-based trophic and habitat shifts for two coastal Arctic fish species |
title_full_unstemmed |
Contrasting intra-individual variation in size-based trophic and habitat shifts for two coastal Arctic fish species |
title_sort |
contrasting intra-individual variation in size-based trophic and habitat shifts for two coastal arctic fish species |
publisher |
Scholarship at UWindsor |
publishDate |
2023 |
url |
https://scholar.uwindsor.ca/ibiopub/164 https://doi.org/10.1007/s00442-023-05423-9 https://scholar.uwindsor.ca/context/ibiopub/article/1163/viewcontent/s00442_023_05423_9.pdf |
long_lat |
ENVELOPE(-117.772,-117.772,70.736,70.736) |
geographic |
Arctic Northwest Territories Canada Greenland Ulukhaktok |
geographic_facet |
Arctic Northwest Territories Canada Greenland Ulukhaktok |
genre |
Arctic Gadus ogac Greenland Greenland cod Northwest Territories Salvelinus alpinus Ulukhaktok |
genre_facet |
Arctic Gadus ogac Greenland Greenland cod Northwest Territories Salvelinus alpinus Ulukhaktok |
op_source |
Integrative Biology Publications |
op_relation |
https://scholar.uwindsor.ca/ibiopub/164 doi:10.1007/s00442-023-05423-9 https://scholar.uwindsor.ca/context/ibiopub/article/1163/viewcontent/s00442_023_05423_9.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1007/s00442-023-05423-9 |
container_title |
Oecologia |
container_volume |
202 |
container_issue |
3 |
container_start_page |
601 |
op_container_end_page |
616 |
_version_ |
1802639415544119296 |