Opening a can of worms: Archived canned fish filets reveal 40 years of change in parasite burden for four salmon species
How has parasitism changed for Alaskan salmon over the past several decades? Parasitological assessments of salmon are inconsistent across time, which may be an oversight: the landscape of parasite risk is changing for salmon, and long-term data are needed to quantify this change. Parasitic nematode...
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Authorea, Inc.
2023
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Online Access: | http://dx.doi.org/10.22541/au.169321509.98625136/v1 |
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crwinnower:10.22541/au.169321509.98625136/v1 2024-06-02T08:13:18+00:00 Opening a can of worms: Archived canned fish filets reveal 40 years of change in parasite burden for four salmon species Mastick, Natalie Welicky, Rachel Katla, Aspen Odegaard, Bruce Ng, Virginia Wood, Chelsea 2023 http://dx.doi.org/10.22541/au.169321509.98625136/v1 unknown Authorea, Inc. posted-content 2023 crwinnower https://doi.org/10.22541/au.169321509.98625136/v1 2024-05-07T14:19:23Z How has parasitism changed for Alaskan salmon over the past several decades? Parasitological assessments of salmon are inconsistent across time, which may be an oversight: the landscape of parasite risk is changing for salmon, and long-term data are needed to quantify this change. Parasitic nematodes of the family Anisakidae use salmon as intermediate or paratenic hosts in life cycles that terminate in marine mammal definitive hosts. Alaskan marine mammals have been protected since the 1970s, and as populations recover, the density of definitive hosts in this region has increased. To assess whether anisakid burden has changed in salmon over time, we used a novel data source: salmon that were caught, canned, and thermally processed for human consumption in Alaska, USA. We examined canned fillets of chum (Oncorhynchus keta, n = 42), coho (O. kisutch, n = 22), pink (O. gorbuscha, n = 62), and sockeye salmon (O. nerka, n = 52) processed between 1979 and 2019. We dissected each fillet and quantified the number of worms per gram of salmon tissue. Anisakid burden increased over time in chum and pink salmon, but there was no change in sockeye or coho salmon. This difference may be due to differences in the prey preferences of each species, or time spent in marine systems. Canned fish serve as a window into the past, providing information on change over time in the parasite burden of commercially, culturally, and ecologically important fish species that would otherwise be lost. Other/Unknown Material Pink salmon Alaska The Winnower Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) |
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The Winnower |
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description |
How has parasitism changed for Alaskan salmon over the past several decades? Parasitological assessments of salmon are inconsistent across time, which may be an oversight: the landscape of parasite risk is changing for salmon, and long-term data are needed to quantify this change. Parasitic nematodes of the family Anisakidae use salmon as intermediate or paratenic hosts in life cycles that terminate in marine mammal definitive hosts. Alaskan marine mammals have been protected since the 1970s, and as populations recover, the density of definitive hosts in this region has increased. To assess whether anisakid burden has changed in salmon over time, we used a novel data source: salmon that were caught, canned, and thermally processed for human consumption in Alaska, USA. We examined canned fillets of chum (Oncorhynchus keta, n = 42), coho (O. kisutch, n = 22), pink (O. gorbuscha, n = 62), and sockeye salmon (O. nerka, n = 52) processed between 1979 and 2019. We dissected each fillet and quantified the number of worms per gram of salmon tissue. Anisakid burden increased over time in chum and pink salmon, but there was no change in sockeye or coho salmon. This difference may be due to differences in the prey preferences of each species, or time spent in marine systems. Canned fish serve as a window into the past, providing information on change over time in the parasite burden of commercially, culturally, and ecologically important fish species that would otherwise be lost. |
format |
Other/Unknown Material |
author |
Mastick, Natalie Welicky, Rachel Katla, Aspen Odegaard, Bruce Ng, Virginia Wood, Chelsea |
spellingShingle |
Mastick, Natalie Welicky, Rachel Katla, Aspen Odegaard, Bruce Ng, Virginia Wood, Chelsea Opening a can of worms: Archived canned fish filets reveal 40 years of change in parasite burden for four salmon species |
author_facet |
Mastick, Natalie Welicky, Rachel Katla, Aspen Odegaard, Bruce Ng, Virginia Wood, Chelsea |
author_sort |
Mastick, Natalie |
title |
Opening a can of worms: Archived canned fish filets reveal 40 years of change in parasite burden for four salmon species |
title_short |
Opening a can of worms: Archived canned fish filets reveal 40 years of change in parasite burden for four salmon species |
title_full |
Opening a can of worms: Archived canned fish filets reveal 40 years of change in parasite burden for four salmon species |
title_fullStr |
Opening a can of worms: Archived canned fish filets reveal 40 years of change in parasite burden for four salmon species |
title_full_unstemmed |
Opening a can of worms: Archived canned fish filets reveal 40 years of change in parasite burden for four salmon species |
title_sort |
opening a can of worms: archived canned fish filets reveal 40 years of change in parasite burden for four salmon species |
publisher |
Authorea, Inc. |
publishDate |
2023 |
url |
http://dx.doi.org/10.22541/au.169321509.98625136/v1 |
long_lat |
ENVELOPE(-19.455,-19.455,65.656,65.656) ENVELOPE(-130.143,-130.143,54.160,54.160) |
geographic |
Keta Sockeye |
geographic_facet |
Keta Sockeye |
genre |
Pink salmon Alaska |
genre_facet |
Pink salmon Alaska |
op_doi |
https://doi.org/10.22541/au.169321509.98625136/v1 |
_version_ |
1800736753978441728 |