wolffish data frame has 25 rows and 2 columns.
The mean catch per tow values were digitized from Figure 4 of Helser and Hayes (1995) and back-transformed to the original scale.
This data frame contains the following columns:
survey year of catch per tow
mean catch per tow value (untransformed)
Helser, T. E. and D. B. Hayes. 1995. Providing quantitative management advice from stock abundance indices based on research surveys. Fishery Bulletin 93: 290-298.