UNIVERSITY OF WISCONSIN-MADISON: Effects on WI larval fish of larval & parental expo

Purpose

The Board of Regents - UW System is sponsoring a grant application that will study the effects of commercially available 2,4-D aquatic herbicides on = several fish and gamefish species. The following experiments will take place: Experiment 1-fathead minnow (Pimephales promelas) larvae hatched from eggs laid by adults not exposed to commercial 2, 4-D herbicide formulations. Larval fish will be reared, under exposure or no exposure, until 30 days post fertilization (dpf). Goal of study: (i) whether larval survival is decreased independent of parental exposure, (ii) whether larval survival is decreased for other formulation(s) besides DMA\00AE 4 IVM (tested in Phase 1), such as Weedestroy\00AE AM40. Experiment 2- focus on WI game fishes and fish that occupies a lower place in food chains. Embryo and larval exposures will be performed. Experiments address: (iii) whether larvae of other native fish species also suffer reduced survival due to exposure. Experiment 3- if results from first two projects fail to doc reduced survival of larvae hatched from eggs laid by adults not exposed to 2, 4-D herbicide formulations. That finding along with the findings from Phase 1 would indicate that decreased larval survival is dependent on parental exposure. Project 3-focus on fathead minnow (Pimephales promelas) larvae hatched from eggs laid by adults exposed or not exposed to commercial 2, 4-D herbicide formulations. These larval fish will be reared, under exposure or no exposure, until 30 days post fertilization (dpf). The goal of these 2 X 2 exposure studies (parents yes/no exposure X larvae yes/no exposure) will be to understand better the role of adult exposure in decreasing larval survival. The studies will be carried out under the direct oversight of the dept liaison. Biannual check-in meetings and annual progress reports will be presented to liaison. The final report will include results and conclusions of these studies and project data in electronic format.

Related Reports

Run Project Summary Report
View Umbrella-Projects
View Related-Projects

Aquatic Invasives Grant
AIRD-104-15
2014
Complete
 
Activities & Recommendations
Grant Awarded
Grant AIRD-104-15 awarded