The paper argues that Cost-Effectiveness Analysis (CEA) can be a suitable
evaluation tool in cases where some of the benefits are difficult to measure
(e.g. habitat protection) and where the tangible benefits are lower than the
cost. An example is polities aiming at protecting a single species in
multispecies fisheries....
Implementation of the U.S. Marine Mammal Protection Act (MMPA)
generates costs to both the public and private sectors. While many of the
costs are complementary, some result in potential tradeoffs between
various groups incurring these costs. Under the MMPA, if estimated
bycatch of a species exceeds its Potential Biological Removal...
Conservation goals and resource use can easily conflict when externalities
exist. This is the case in the Baltic Sea with grey seal (Halichoerus grypus)
and Atlantic salmon (Salmo salar). Both of the species have been defined
as critically endangered in the late 20th century but due to conservation
schemes, harvest...
With a value of NZ$ 85 million the seasonal squid fishery represents one of
New Zealands main export earners. The majority of catch is taken by trawl
from the Auckland Islands, 350 km south of New Zealand, which coincides
with the main breeding and foraging range of the rare Hookers...
For every fish species, future potential harvests are impacted by current
catch levels and patterns. Traditionally, managers use regulations on gear
(e.g., mesh size) to control so-called growth overfishing. Such regulations
are likely economically inefficient due to increased search costs and lower
catch rates. Bioeconomic models typically evaluate efficiency for...
A concern for the consequences of bycatch and discards in fisheries has led to the implementation of
new policies and fisheries management plans aimed at their reduction in many fisheries around the
world. Such plans have been developed for the Australian Commonwealth fisheries (the most recent
bycatch action plan extends...
Growth overfishing squanders large parts of the potential rents in fisheries. Many of today’s fisheries are
characterized by a severely truncated age-distribution, which in addition may have irreversible ecological
consequences. Nevertheless, the implications of age-differentiated harvesting for management have
received surprisingly little attention in the literature. In the present paper,...
The concept of compensatory mitigation is well established as an approach to environmental management. In the past, mitigation programs have been used to conserve wetlands affected by development, and is proposed as a cost-effective approach to offsetting greenhouse gas emissions through reforestation programs. The concept may be equally applicable to...
New Zealands quota management system is based on transferable
harvesting rights operating within regulated allowable harvest limits. The
system has evolved since its implementation in 1986. One particular
challenge has been the design of mechanisms to encourage the balancing of
catch against quota. A model is developed for a target...
This paper develops a count data model of target species and bycatch
production for an arbitrary number of species that handles correlation
between species and over time. The model is applied to a large observer
dataset for fishing trips taken from 1990 to 2008 for roughly 150 vessels
participating in...