Lengths and weights for Bull Trout from two Rocky Mountain lakes and two eras.
Lengths and weights of Bull Trout (Salvelinus confluentis) from two Rocky Mountain lakes in Alberta, CAN and two eras.
A data frame with 137 observations on the following 3 variables:
Fork length (mm)
Wet mass (g)
Era of collection (1977-79 and 2001)
Weight-Length
Length Frequency
The historical (1977-1980) era samples were from before restrictive sportfishing regulatory regimes were implemented (in the 1990s) that led to changes in abundance and population structure of bull trout.
From (approximately) Figure 2 of Parker, B.R., D.W. Schindler, F.M. Wilhelm, and D.B. Donald. 2007. Bull trout population responses to reductions in angler effort and retention limits. North American Journal of Fisheries Management, 27:848-859. [Was (is?) from https://www.researchgate.net/publication/233144141_Bull_Trout_Population_Responses_to_Reductions_in_Angler_Effort_and_Retention_Limits.]
data(BullTroutRML1) str(BullTroutRML1) head(BullTroutRML1) op <- par(mfrow=c(1,2),pch=19) plot(mass~fl,data=BullTroutRML1,subset=era=="1977-79",main="1977-79") plot(mass~fl,data=BullTroutRML1,subset=era=="2001",main="2001") par(op)
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