Academic Journal
Unique diet and Philonema sp. infections in reservoir-rearing juvenile Chinook Salmon
| العنوان: | Unique diet and Philonema sp. infections in reservoir-rearing juvenile Chinook Salmon |
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| المؤلفون: | Larson, Marina S., Choudhury, Anindo, Gardner, Ethan N., Konstantinidis, Peter, Murphy, Christina A., Kent, Michael L., Peterson, James T., Couch, Claire E. |
| المساهمون: | U.S. Army Corps of Engineers |
| المصدر: | Transactions of the American Fisheries Society ; volume 153, issue 3, page 312-325 ; ISSN 0002-8487 1548-8659 |
| بيانات النشر: | Oxford University Press (OUP) |
| سنة النشر: | 2024 |
| الوصف: | Objective Dams and reservoirs can alter juvenile growth and survival of migratory salmonids through several physical and biological mechanisms. Juvenile Chinook Salmon Oncorhynchus tshawytscha that are produced upstream of large hydropower dams may have associated passage mortality, but the reservoirs created by these dams can support rapid growth. Characterizing the biotic drivers of growth and mortality in reservoirs may aid in understanding the cumulative effects of river impoundments on migratory salmonid populations. The purpose of this study was to understand how reservoirs facilitate rapid growth in juvenile Chinook Salmon. Methods We analyzed stomach contents to determine diet composition throughout the summer and fall. We also recorded prevalence of the parasitic nematode Philonema sp. in the coeloms of fish. Result We found that juvenile Chinook Salmon frequently consumed young-of-year centrarchids, which likely contributed to rapid growth. Piscivory was highest from July through October and decreased with surface temperature from November through December. Correspondingly, zooplankton and arthropod consumption increased in November and December. Prevalence of visible Philonema sp. infections in the coelom was high (34.6%), negatively associated with time, and nonlinearly associated with fork length. Conclusion These findings reveal unique diet patterns and suggest potential parasite-associated mortality in reservoir-rearing Chinook Salmon, but more detailed studies across a longer time scale are needed to robustly assess the population-level effects of this parasite. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1002/tafs.10462 |
| الاتاحة: | https://doi.org/10.1002/tafs.10462 https://afspubs.onlinelibrary.wiley.com/doi/am-pdf/10.1002/tafs.10462 https://academic.oup.com/tafs/article-pdf/153/3/312/60130055/tafs10462.pdf |
| Rights: | https://academic.oup.com/pages/standard-publication-reuse-rights ; http://onlinelibrary.wiley.com/termsAndConditions#am ; http://onlinelibrary.wiley.com/termsAndConditions#vor |
| رقم الانضمام: | edsbas.B6E38C19 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1002/tafs.10462 |
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