Effects of age, sex and reproductive status on persistent organic pollutant concentrations in ‘‘Southern Resident†killer whales
‘‘Southern Resident†killer whales (Orcinus orca) that comprise three fish-eating ‘‘pods†(J, K and L) were listed as ‘‘endangered†in the US and Canada following a 20% population decline between 1996 and 2001. Blubber biopsy samples from Southern Resident juveniles had statistically...
Main Authors: | , , , , , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
DigitalCommons@University of Nebraska - Lincoln
2009
|
Subjects: | |
Online Access: | https://digitalcommons.unl.edu/usdeptcommercepub/427 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1426/viewcontent/Krahn_MPB_2009_Effects_of_age__sex_and_reproductive_status.pdf |
id |
ftunivnebraskali:oai:digitalcommons.unl.edu:usdeptcommercepub-1426 |
---|---|
record_format |
openpolar |
spelling |
ftunivnebraskali:oai:digitalcommons.unl.edu:usdeptcommercepub-1426 2024-09-30T14:40:57+00:00 Effects of age, sex and reproductive status on persistent organic pollutant concentrations in ‘‘Southern Resident†killer whales Krahn, Margaret M. Hanson, M. Bradley Schorr, Gregory Emmons, Candice K. Burrows, Douglas G. Bolton, Jennie L. Baird, Robin W. Ylitalo, Gina M. 2009-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/usdeptcommercepub/427 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1426/viewcontent/Krahn_MPB_2009_Effects_of_age__sex_and_reproductive_status.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/usdeptcommercepub/427 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1426/viewcontent/Krahn_MPB_2009_Effects_of_age__sex_and_reproductive_status.pdf United States Department of Commerce: Staff Publications Biopsy sampling Persistent organic pollutants Brominated diphenyl ethers Endangered species Stable isotopes Orcinus orca text 2009 ftunivnebraskali 2024-09-02T07:48:20Z ‘‘Southern Resident†killer whales (Orcinus orca) that comprise three fish-eating ‘‘pods†(J, K and L) were listed as ‘‘endangered†in the US and Canada following a 20% population decline between 1996 and 2001. Blubber biopsy samples from Southern Resident juveniles had statistically higher concentrations of certain persistent organic pollutants than were found for adults. Most Southern Resident killer whales, including the four juveniles, exceeded the health-effects threshold for total PCBs in marine mammal blubber. Maternal transfer of contaminants to the juveniles during rapid development of their biological systems may put these young whales at greater risk than adults for adverse health effects (e.g., immune and endocrine system dysfunction). Pollutant ratios and field observations established that two of the pods (K- and L-pod) travel to California to forage. Nitrogen stable isotope values, supported by field observations, indicated possible changes in the diet of L-pod over the last decade. Text Orca Orcinus orca University of Nebraska-Lincoln: DigitalCommons@UNL Canada |
institution |
Open Polar |
collection |
University of Nebraska-Lincoln: DigitalCommons@UNL |
op_collection_id |
ftunivnebraskali |
language |
unknown |
topic |
Biopsy sampling Persistent organic pollutants Brominated diphenyl ethers Endangered species Stable isotopes Orcinus orca |
spellingShingle |
Biopsy sampling Persistent organic pollutants Brominated diphenyl ethers Endangered species Stable isotopes Orcinus orca Krahn, Margaret M. Hanson, M. Bradley Schorr, Gregory Emmons, Candice K. Burrows, Douglas G. Bolton, Jennie L. Baird, Robin W. Ylitalo, Gina M. Effects of age, sex and reproductive status on persistent organic pollutant concentrations in ‘‘Southern Resident†killer whales |
topic_facet |
Biopsy sampling Persistent organic pollutants Brominated diphenyl ethers Endangered species Stable isotopes Orcinus orca |
description |
‘‘Southern Resident†killer whales (Orcinus orca) that comprise three fish-eating ‘‘pods†(J, K and L) were listed as ‘‘endangered†in the US and Canada following a 20% population decline between 1996 and 2001. Blubber biopsy samples from Southern Resident juveniles had statistically higher concentrations of certain persistent organic pollutants than were found for adults. Most Southern Resident killer whales, including the four juveniles, exceeded the health-effects threshold for total PCBs in marine mammal blubber. Maternal transfer of contaminants to the juveniles during rapid development of their biological systems may put these young whales at greater risk than adults for adverse health effects (e.g., immune and endocrine system dysfunction). Pollutant ratios and field observations established that two of the pods (K- and L-pod) travel to California to forage. Nitrogen stable isotope values, supported by field observations, indicated possible changes in the diet of L-pod over the last decade. |
format |
Text |
author |
Krahn, Margaret M. Hanson, M. Bradley Schorr, Gregory Emmons, Candice K. Burrows, Douglas G. Bolton, Jennie L. Baird, Robin W. Ylitalo, Gina M. |
author_facet |
Krahn, Margaret M. Hanson, M. Bradley Schorr, Gregory Emmons, Candice K. Burrows, Douglas G. Bolton, Jennie L. Baird, Robin W. Ylitalo, Gina M. |
author_sort |
Krahn, Margaret M. |
title |
Effects of age, sex and reproductive status on persistent organic pollutant concentrations in ‘‘Southern Resident†killer whales |
title_short |
Effects of age, sex and reproductive status on persistent organic pollutant concentrations in ‘‘Southern Resident†killer whales |
title_full |
Effects of age, sex and reproductive status on persistent organic pollutant concentrations in ‘‘Southern Resident†killer whales |
title_fullStr |
Effects of age, sex and reproductive status on persistent organic pollutant concentrations in ‘‘Southern Resident†killer whales |
title_full_unstemmed |
Effects of age, sex and reproductive status on persistent organic pollutant concentrations in ‘‘Southern Resident†killer whales |
title_sort |
effects of age, sex and reproductive status on persistent organic pollutant concentrations in ‘‘southern resident†killer whales |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2009 |
url |
https://digitalcommons.unl.edu/usdeptcommercepub/427 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1426/viewcontent/Krahn_MPB_2009_Effects_of_age__sex_and_reproductive_status.pdf |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Orca Orcinus orca |
genre_facet |
Orca Orcinus orca |
op_source |
United States Department of Commerce: Staff Publications |
op_relation |
https://digitalcommons.unl.edu/usdeptcommercepub/427 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1426/viewcontent/Krahn_MPB_2009_Effects_of_age__sex_and_reproductive_status.pdf |
_version_ |
1811643401867624448 |