Effects of estrogens and atrazine on functional immune responses of largemouth bass (Micropterus salmoides)
Dates
Publication Date
2024-07-01
Start Date
2018-12-01
End Date
2018-04-10
Citation
Iwanowicz, L.R., Leet, J.K., Richter, C.K., and Tillitt, D.E., 2024, Effects of estrogens and atrazine on functional immune responses of largemouth bass (Micropterus salmoides): U.S. Geological Survey data release, https://doi.org/10.5066/P9LDPEJF.
Summary
Disease outbreaks, skin lesions, fish kill events, and reproductive abnormalities have been observed in wild populations of bass in the Chesapeake Bay watershed. Occurrence of synthetic and natural hormones from wastewater treatment plants and livestock operations, pesticides from agricultural lands, and phytoestrogens from cover crops have been implicated as potential causes of these adverse effects. Late summer to fall is the period of early gonad recrudescence in adult bass when spermatogenesis and oogenesis begin for the upcoming spawning event in spring. Our objective was to assess whether early gonad recrudescence was a period of sensitivity for inducing immunomodulation. Adult largemouth bass (LMB; Micropterus salmoides) were [...]
Summary
Disease outbreaks, skin lesions, fish kill events, and reproductive abnormalities have been observed in wild populations of bass in the Chesapeake Bay watershed. Occurrence of synthetic and natural hormones from wastewater treatment plants and livestock operations, pesticides from agricultural lands, and phytoestrogens from cover crops have been implicated as potential causes of these adverse effects. Late summer to fall is the period of early gonad recrudescence in adult bass when spermatogenesis and oogenesis begin for the upcoming spawning event in spring. Our objective was to assess whether early gonad recrudescence was a period of sensitivity for inducing immunomodulation. Adult largemouth bass (LMB; Micropterus salmoides) were exposed in outdoor pond mesocosms from post-spawning (July) through early gonad recrudescence (November) to either a model estrogen, 17alpha-ethinylestradiol (EE2; 2.4 ng/L), a mixture of endocrine-active substances commonly detected in the Chesapeake Bay watershed (MIX; 5.4 µg atrazine/L and 47.9 ng estrone/L), or a solvent control. Immune endpoints including mitogenesis and respiratory burst were assessed in fish sampled during December and April.
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Immune.metadata_Review.xml Original FGDC Metadata
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Purpose
Data presented are measures of functional immune responses. These endpoints were measure to determine if exposure of estrogens or mixtures or estogens and herbicides in the summer impacted immune responses in subsequent seasons.
