annotated bibliography of fisheries economics literature - Office of ...

Southeast Fisheries Center, Miami Laboratory, Coastal Resources
Division, 75 Virginia Beach Drive, Miami, FL.
This document updates tables and analyses that were presented in the
1992 assessment (Goodyear, 1992). New data are available for the 1993
commercial harvest, the 1992 recreational harvest, and recruitment indices for
the 1991 and 1992 year classes. These data permit characterization of the
size and age composition of the 1992 commercial and recreational catches that
were not available for the previous assessment. The time series available to
estimate catch per unit effort for all sectors of the recreation fishery are
also extended through 1992. These data were used to re-estimate historical
fishing mortalities for the directed fishery and shrimp bycatch mortality
using the methods described in the earlier assessment. The possible
implications for several management alternatives were also forecasted based on
the current best estimates of fishing mortality and recruitment. The results
of the present analyses are presented in figures and tables numbered to
correspond to those in the previous work. A new executive summary, tables,
and figures are provided.
Goodyear, C. Phillip (1993). Spawning Stock Biomass per Recruit in Fisheries
Management: Foundation and Current Use. Pages 67-81 in S.J. Smith,
J.J. Hunt, and D. Rivard (ed.) Risk Evaluation and Biological Reference
Points for Fisheries Management, Can. Spec. Publ. Fish. Aquat. Sci. 120.
Spawning stock biomass per recruit (SSBR) estimates the expected
lifetime reproductive potential of an average recruit (P), which is an
important correlate of population growth potential. The ratio of the fished
to unfished magnitude of P is the spawning potential ratio (SPR) and is a
measure of the impact of fishing on the potential productivity of the stock.
Current use of SPR merges concepts developed to quantify the compensation
required for population persistence given anthropogenic increases in mortality
with observations of stock productivity and SSBR for fisheries in the western
North Atlantic. It has a firm theoretical basis and is evaluated against
yield per recruit and contrasted with other traditional biological reference
points. SPR is widely used in U.S. fisheries managed under the Magnuson
Fishery Conservation and Management Act, usually in the context of a
percentage of the unfished SSBR. Its implementation is intended to be risk
aversive through selection of minimum acceptable levels above which stocks
maintain acceptable productivity. The behavior of the underlying principles
suggests SPR values below about 0.2 should be avoided unless there is evidence
for exceptionally strong density dependence in the stock. Critical levels
have typically been set in the range of 0.2 to 0.3 primarily based upon the
experience in the northwest Atlantic.
Goodyear, C. Phillip (1994). "Red Snapper in U.S. Waters of the Gulf of
Mexico." Contribution: MIA 93/94-63, Southeast Fisheries Center,
Miami Laboratory, Coastal Resources Division, 75 Virginia Beach
Drive, Miami, FL.
The 1994 red snapper stock assessment report concludes that the stock
conservation measures currently in place are enhancing the condition of the
stock. However, if the 50% reduction in bycatch mortality rate is not
achieved in the near future, it will not be possible to attain the spawning
stock goals of the plan by the target date of 2009 and to also allow the
directed fishery to operate under the current catch limit of 6 million pounds.
These estimates are considerably more pessimistic than those presented in
1993, primarily because the 1993 and 1994 catches exceeded TAC.
Goodyear, C. Phillip (1994). "Biological Reference Points for Red
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