2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/06/2017 | 12:15 PM - 12:30 PM | ENEMY EXACERBATION: EFFECTS OF PREDATOR STRESS ON SULFATE LETHALITY IN FRESHWATER AMPHIPODS | 305B
ENEMY EXACERBATION: EFFECTS OF PREDATOR STRESS ON SULFATE LETHALITY IN FRESHWATER AMPHIPODS
The presence of predator cues can influence the response of aquatic organisms to anthropogenic contaminants. This study examined the effects of predator cues on behavior, metabolic rate, and sulfate (as Na2SO4) toxicity in amphipods (Gammarus sp). Predator cues included alarm cue (macerated conspecifics) and kairomone from mosquitofish (Gambusia affinis) fed amphipods. Avoidance behavior was quantified by measuring time spent active and sheltering in refuge when amphipods were exposed to cues. Lethality trials (96 h) were performed with amphipods exposed to salt alone and salt + cue (2 h cue exposure/day). Intermittent flow respirometry was used to measure oxygen consumption both during and after exposure to cues. Amphipods responded to both types of cue behaviorally, but toxicity tests only showed an increased response to sulfate when kairomone was present.
- C13 Ecotoxicology
- C03 Invertebrates
- S03 Stressing the 'Eco' in Freshwater Ecotoxicology
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Presenters/Authors
Trevor Chapman
(), East Tennessee State University, chapmantl@goldmail.etsu.edu;
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Joseph Bidwell
(), East Tennessee State University, bidwell@mail.etsu.edu;
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