Estimate the trap rate at Lower Granite by using the proportion of previously PIT tagged fish observed passing Lower Granite and at a "later" location that were found in the fish trap.
tagTrapRate(
trap_dataframe = NULL,
week_strata = NULL,
mark_site = c("LGRLDR", "LGR")
)dataframe containing data from the fish trap, including columns named Tag.ID, CollectionDate and SRR.
vector of intervals delimiting the weekly strata to summarize mark-recapture data over, as returned by the weeklyStrata function.
PTAGIS code for the site at the location being queried for trap rate. This is used to filter out fish that were marked at the fish trap.