Join us at 10:00 am (Pacific) on January 16th for the next meeting of the PNAMP Fish Monitoring Work Group (FMWG). During the meeting, we will update participants on current tasks, hear a presentation about innovative fish monitoring, and provide you with opportunities to engage regional managers and experts. These meetings are an opportune time to discuss tasks and get input from members on where they see importance or could use facilitated support.

Tech Talk: RECORDING AVAILABLE UPON REQUEST, send email to mdethloff@usgs.gov

Putting Time Back into Space-for-Time Mark-Recapture Models
Authors: Russell W. Perry, Dalton J. Hance, and Adam C. Pope

Summary:
Russell Perry, a Research Fish Biologist in the Quantitative Ecology Section at the US Geological Survey with the Western Fisheries Research Center will present Putting Time Back into Space-for-Time Mark-Recapture Models. Mark-recapture models such as the Cormack-Jolly-Seber and multi-state models are widely used to estimate survival of PIT- and acoustic-tagged fish migrating through stream and river networks. Although mark-recapture models were designed to estimate survival over time between discrete sampling occasions, when applied to migratory animals space can be swapped for time by using the discrete sampling locations to form detection “gates” along the migratory corridor. However, space-for-time models pose significant challenges when interest centers on understanding the effect of time-varying covariates on survival. This is because the environmental conditions that fish experienced upon passing a detection gate is unknown when individuals are not detected. In this presentation, we describe Time-Integrated Migration and Survival (TIMS) models that overcome this limitation of space-for-time mark-recapture models. TIMS models combine a migration model with a mark-recapture model to explicitly model travel times between detection gates and to account for probable arrival times and environmental conditions experienced by undetected fish. We provide example applications of these models to both acoustic- and PIT-tagged juvenile salmon to illustrate how the TIMS modeling framework allows for estimating effects of daily covariates such as flow and temperature on migration and survival.

Agenda

• 10:00 – Welcome and Introductions
• 10:05 – Task Updates
• 10:20 – Tech Talk
• 11:10 – Q&A
• 11:30 – Adjourn

Click link below to join on January 16th

Never been to a FMWG meeting? This meeting is a perfect time to learn about the project, join in, and help guide future work.

Missed a previous FMWG meeting? Check out our YouTube page for presentations or task meetings.

The PNAMP Fish Monitoring Work Group (FMWG), meets quarterly to discuss task progress, share expertise through guest presentations, and support collaboration, communication, and coordination among fish monitoring practitioners for effective monitoring and efficient data sharing. The FMWG is also interested in your work; if you would like to present your innovative fish monitoring ideas or any recent publications at a future meeting please contact Meg Dethloff, mdethloff@usgs.gov