7755

• UCREFRP Catalog Number: 7755
• Author: White, R. J.
• Title: Why Wild Fish Matter
• USFW Year: 1992
• USFW - Doc Type: Balancing Ecological and Aquacultural Fishery Management
• Copyright Material: YES

figure 4. Biomass density (weight of fish per channel length as inventoried 6y eledrofishing in late July or
early August) of trout populations in two Pennsylvania streams where trout stocking was lass done in 1982.
Through 1983, the fishing regulations on both were 6 inches minimum creelable size and a creellimit of 8
trout per day. Starting in 1984, each stream had the following regulations: 14-inch minimum length limit, 2
trout per day, and o season from mid-April through February. *A February flood wiped out this year's young
fish, reducing population growth potential in the next few years.
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CEDAR, RUN, A TYPICAL FREESTONE
MOUNTAINOUS POTTER COUNTY,
PENNSYLVANIA, HAS BENEFITED FROM
NEW, ECOLOGICALLY-0RIENTED
FISHERY IApNAGEMENT. THE STATE'S
"OPERATION FUTURE," LAUNCHED
DURING THE 19805 WITH THE
SUPPORT OF TROUT UNIIMiTED,
EMPHASIlES HABITAT PROTECTION
AND NATURAL REPRODUCTION.
u ~r~ st` i~~~,_~
figure 5. Biomass density in August among length groups of brown trout in a i00-meter study. ion boys:
1978, under heavy stocking with hatchery trout, o creel limit of 8 trout doily and o size limit of 6 inthes
(150mm). Green bars: 1991, after the 1983 change to no stocking, a reel limit of 2 trout daily, and o size
limit of 14 inches (350mm).
Figure 6. Summer population densities of brown trout larger than 12 inches (green bars) and smaller than
6 inches (tan bars). The under-6-inch fish indicate the extent of natural reproduttion. *Trout reproduction
devastated by a severe February flood.