The threat of toxic contaminants to Southern Resident killer whales: monitoring POPs and PAHs in scat samples
The Southern Resident killer whale population (SRKW; Orcinus orca) feed primarily on Chinook salmon, which is currently their primary source of exposure to toxics. We measured lipophilic persistent organic pollutants (POPs: PBDEs, PCBs, and DDTs) in SRKW scat (fecal) samples to quantify variations i...
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ftwestwashington:oai:cedar.wwu.edu:ssec-2474 2023-05-15T17:03:40+02:00 The threat of toxic contaminants to Southern Resident killer whales: monitoring POPs and PAHs in scat samples Lundin, Jessica I. Ylitalo, Gina Maria Giles, Deborah Seely, Elizabeth Parsons, Kim Hempelmann, Jennifer Anulacion, Bernadita F. Boyd, Daryle Wasser, Samuel K. 2018-04-04T21:15:00Z https://cedar.wwu.edu/ssec/2018ssec/allsessions/39 English eng Western CEDAR https://cedar.wwu.edu/ssec/2018ssec/allsessions/39 This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University. Salish Sea Ecosystem Conference Fresh Water Studies Life Sciences Marine Biology Natural Resources and Conservation Terrestrial and Aquatic Ecology text 2018 ftwestwashington 2022-09-14T06:02:46Z The Southern Resident killer whale population (SRKW; Orcinus orca) feed primarily on Chinook salmon, which is currently their primary source of exposure to toxics. We measured lipophilic persistent organic pollutants (POPs: PBDEs, PCBs, and DDTs) in SRKW scat (fecal) samples to quantify variations in toxicant levels by pod, sex, and reproductive class, as well as prey availability. We also measured polycyclic aromatic hydrocarbons (PAHs), which do not generally bioaccumulate and would reflect recent exposure to oil, engine (combustion) exhaust, among other potential exposure sources. Samples were collected using detection dogs that use scent to locate fresh SRKW scat on the water’s surface. We collected 267 samples during four 5-month study periods between 2010 and 2013. POP levels in scat had expected trends, such as increasing with age and decreasing by number of calves (for adult females). POPs were also highest when the whales primary prey source was at low seasonal abundance, presumably due to metabolizing endogenous lipid stores. By contrast, overall measures of PAHs were low (ppb, wet weight), as expected. However, PAHs indicative of motor exhaust versus oil exposure were relatively high prior to implementation of guidelines aimed at increasing vessel distances to the whales. Results point to the value of monitoring POPs by age, sex and reproductive class and in relation to changes in prey abundance to help identify what reproductive classes are most at risk to high toxic loads, what season the liability is greatest, and whether prey recovery and clean up efforts are working. The PAH exposure data will be available as baseline in SRKW feces in relation to environmental events over time, such as the circumstance of an oil spill in the Salish Sea. Addressing toxics and other vulnerabilities is important for SRKW recovery. Text Killer Whale Orca Orcinus orca Killer whale Western Washington University: CEDAR (Contributing to Education through Digital Access to Research) |
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Open Polar |
collection |
Western Washington University: CEDAR (Contributing to Education through Digital Access to Research) |
op_collection_id |
ftwestwashington |
language |
English |
topic |
Fresh Water Studies Life Sciences Marine Biology Natural Resources and Conservation Terrestrial and Aquatic Ecology |
spellingShingle |
Fresh Water Studies Life Sciences Marine Biology Natural Resources and Conservation Terrestrial and Aquatic Ecology Lundin, Jessica I. Ylitalo, Gina Maria Giles, Deborah Seely, Elizabeth Parsons, Kim Hempelmann, Jennifer Anulacion, Bernadita F. Boyd, Daryle Wasser, Samuel K. The threat of toxic contaminants to Southern Resident killer whales: monitoring POPs and PAHs in scat samples |
topic_facet |
Fresh Water Studies Life Sciences Marine Biology Natural Resources and Conservation Terrestrial and Aquatic Ecology |
description |
The Southern Resident killer whale population (SRKW; Orcinus orca) feed primarily on Chinook salmon, which is currently their primary source of exposure to toxics. We measured lipophilic persistent organic pollutants (POPs: PBDEs, PCBs, and DDTs) in SRKW scat (fecal) samples to quantify variations in toxicant levels by pod, sex, and reproductive class, as well as prey availability. We also measured polycyclic aromatic hydrocarbons (PAHs), which do not generally bioaccumulate and would reflect recent exposure to oil, engine (combustion) exhaust, among other potential exposure sources. Samples were collected using detection dogs that use scent to locate fresh SRKW scat on the water’s surface. We collected 267 samples during four 5-month study periods between 2010 and 2013. POP levels in scat had expected trends, such as increasing with age and decreasing by number of calves (for adult females). POPs were also highest when the whales primary prey source was at low seasonal abundance, presumably due to metabolizing endogenous lipid stores. By contrast, overall measures of PAHs were low (ppb, wet weight), as expected. However, PAHs indicative of motor exhaust versus oil exposure were relatively high prior to implementation of guidelines aimed at increasing vessel distances to the whales. Results point to the value of monitoring POPs by age, sex and reproductive class and in relation to changes in prey abundance to help identify what reproductive classes are most at risk to high toxic loads, what season the liability is greatest, and whether prey recovery and clean up efforts are working. The PAH exposure data will be available as baseline in SRKW feces in relation to environmental events over time, such as the circumstance of an oil spill in the Salish Sea. Addressing toxics and other vulnerabilities is important for SRKW recovery. |
format |
Text |
author |
Lundin, Jessica I. Ylitalo, Gina Maria Giles, Deborah Seely, Elizabeth Parsons, Kim Hempelmann, Jennifer Anulacion, Bernadita F. Boyd, Daryle Wasser, Samuel K. |
author_facet |
Lundin, Jessica I. Ylitalo, Gina Maria Giles, Deborah Seely, Elizabeth Parsons, Kim Hempelmann, Jennifer Anulacion, Bernadita F. Boyd, Daryle Wasser, Samuel K. |
author_sort |
Lundin, Jessica I. |
title |
The threat of toxic contaminants to Southern Resident killer whales: monitoring POPs and PAHs in scat samples |
title_short |
The threat of toxic contaminants to Southern Resident killer whales: monitoring POPs and PAHs in scat samples |
title_full |
The threat of toxic contaminants to Southern Resident killer whales: monitoring POPs and PAHs in scat samples |
title_fullStr |
The threat of toxic contaminants to Southern Resident killer whales: monitoring POPs and PAHs in scat samples |
title_full_unstemmed |
The threat of toxic contaminants to Southern Resident killer whales: monitoring POPs and PAHs in scat samples |
title_sort |
threat of toxic contaminants to southern resident killer whales: monitoring pops and pahs in scat samples |
publisher |
Western CEDAR |
publishDate |
2018 |
url |
https://cedar.wwu.edu/ssec/2018ssec/allsessions/39 |
genre |
Killer Whale Orca Orcinus orca Killer whale |
genre_facet |
Killer Whale Orca Orcinus orca Killer whale |
op_source |
Salish Sea Ecosystem Conference |
op_relation |
https://cedar.wwu.edu/ssec/2018ssec/allsessions/39 |
op_rights |
This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University. |
_version_ |
1766057584901488640 |