Diet and resource use among Greenland sharks (somniosus microcephalus) and teleosts sampled in icelandic waters, using δ 13 C, δ 15 N, and mercury
Stable carbon (δ13C) and nitrogen (δ15N) isotopes and total mercury (Hg) were used to investigate diet and resource use among Greenland sharks (Somniosus microcephalus) and 14 teleosts inhabiting Icelandic waters. Greenland shark stomachs contained 11 of the teleosts sampled, along with other fishes...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , , , |
Format: | Text |
Language: | unknown |
Published: |
Scholarship at UWindsor
2010
|
Subjects: | |
Online Access: | https://scholar.uwindsor.ca/glierpub/399 https://doi.org/10.1139/F10-072 |
id |
ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1401 |
---|---|
record_format |
openpolar |
spelling |
ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1401 2023-06-11T04:12:02+02:00 Diet and resource use among Greenland sharks (somniosus microcephalus) and teleosts sampled in icelandic waters, using δ 13 C, δ 15 N, and mercury McMeans, Bailey C. Svavarsson, Jöundur Dennard, Susan Fisk, Aaron T. 2010-10-25T07:00:00Z https://scholar.uwindsor.ca/glierpub/399 https://doi.org/10.1139/F10-072 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/399 doi:10.1139/F10-072 https://doi.org/10.1139/F10-072 Great Lakes Institute for Environmental Research Publications text 2010 ftunivwindsor https://doi.org/10.1139/F10-072 2023-05-06T19:10:50Z Stable carbon (δ13C) and nitrogen (δ15N) isotopes and total mercury (Hg) were used to investigate diet and resource use among Greenland sharks (Somniosus microcephalus) and 14 teleosts inhabiting Icelandic waters. Greenland shark stomachs contained 11 of the teleosts sampled, along with other fishes and marine mammal tissues. Teleost resource use ranged from pelagic (e.g., Argentina silus) to benthic (e.g., Anarhichas lupus) based on δ13C, and relative trophic positions (TP, based on δ15N) ranged from 3.0 (Mallotus villosus) to 3.8 (e.g., Brosme brosme). Greenland shark δ13C indicated feeding on benthic and pelagic resources, with a high input of pelagic carbon, and δ15N indicated a relative TP of 4.3. Log[Hg] increased with δ15N (i.e., TP) from teleosts to Greenland sharks and was higher in offshore vs. inshore teleosts. Linear regressions revealed that log[Hg] was better described by both δ15N and δ13C-assigned resource use than by δ15N alone. Hg was useful for supporting the TPs suggested by δ15N, and the higher Hg in offshore fishes could help explain the high Hg of Greenland sharks. Results from this study demonstrated the potential use of Hg as a dietary tracer in marine fishes. Text Greenland Somniosus microcephalus University of Windsor, Ontario: Scholarship at UWindsor Greenland Argentina Canadian Journal of Fisheries and Aquatic Sciences 67 9 1428 1438 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
description |
Stable carbon (δ13C) and nitrogen (δ15N) isotopes and total mercury (Hg) were used to investigate diet and resource use among Greenland sharks (Somniosus microcephalus) and 14 teleosts inhabiting Icelandic waters. Greenland shark stomachs contained 11 of the teleosts sampled, along with other fishes and marine mammal tissues. Teleost resource use ranged from pelagic (e.g., Argentina silus) to benthic (e.g., Anarhichas lupus) based on δ13C, and relative trophic positions (TP, based on δ15N) ranged from 3.0 (Mallotus villosus) to 3.8 (e.g., Brosme brosme). Greenland shark δ13C indicated feeding on benthic and pelagic resources, with a high input of pelagic carbon, and δ15N indicated a relative TP of 4.3. Log[Hg] increased with δ15N (i.e., TP) from teleosts to Greenland sharks and was higher in offshore vs. inshore teleosts. Linear regressions revealed that log[Hg] was better described by both δ15N and δ13C-assigned resource use than by δ15N alone. Hg was useful for supporting the TPs suggested by δ15N, and the higher Hg in offshore fishes could help explain the high Hg of Greenland sharks. Results from this study demonstrated the potential use of Hg as a dietary tracer in marine fishes. |
format |
Text |
author |
McMeans, Bailey C. Svavarsson, Jöundur Dennard, Susan Fisk, Aaron T. |
spellingShingle |
McMeans, Bailey C. Svavarsson, Jöundur Dennard, Susan Fisk, Aaron T. Diet and resource use among Greenland sharks (somniosus microcephalus) and teleosts sampled in icelandic waters, using δ 13 C, δ 15 N, and mercury |
author_facet |
McMeans, Bailey C. Svavarsson, Jöundur Dennard, Susan Fisk, Aaron T. |
author_sort |
McMeans, Bailey C. |
title |
Diet and resource use among Greenland sharks (somniosus microcephalus) and teleosts sampled in icelandic waters, using δ 13 C, δ 15 N, and mercury |
title_short |
Diet and resource use among Greenland sharks (somniosus microcephalus) and teleosts sampled in icelandic waters, using δ 13 C, δ 15 N, and mercury |
title_full |
Diet and resource use among Greenland sharks (somniosus microcephalus) and teleosts sampled in icelandic waters, using δ 13 C, δ 15 N, and mercury |
title_fullStr |
Diet and resource use among Greenland sharks (somniosus microcephalus) and teleosts sampled in icelandic waters, using δ 13 C, δ 15 N, and mercury |
title_full_unstemmed |
Diet and resource use among Greenland sharks (somniosus microcephalus) and teleosts sampled in icelandic waters, using δ 13 C, δ 15 N, and mercury |
title_sort |
diet and resource use among greenland sharks (somniosus microcephalus) and teleosts sampled in icelandic waters, using δ 13 c, δ 15 n, and mercury |
publisher |
Scholarship at UWindsor |
publishDate |
2010 |
url |
https://scholar.uwindsor.ca/glierpub/399 https://doi.org/10.1139/F10-072 |
geographic |
Greenland Argentina |
geographic_facet |
Greenland Argentina |
genre |
Greenland Somniosus microcephalus |
genre_facet |
Greenland Somniosus microcephalus |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/399 doi:10.1139/F10-072 https://doi.org/10.1139/F10-072 |
op_doi |
https://doi.org/10.1139/F10-072 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
67 |
container_issue |
9 |
container_start_page |
1428 |
op_container_end_page |
1438 |
_version_ |
1768387607132110848 |