Recreational fisheries regulations at the state level along the US Atlantic coast are constantly changing to ensure the sustainability of marine fish populations. It is hypothesized that effective management of recreational fishing effort should have a positive impact on fish stocks. Using recreational catch per unit effort (CPUE) as a...
This paper analyzes the effects of spatial closures on the multi-species
groundfish trawl fishery in northern and central California. The analysis
differentiates between changes in total effort and in the spatial distribution
of effort before and after implementation of the closures. We use logbook
data on the location and duration...
The international council for the exploration of the seas (ICES) publish
annual reports on fish stock assessments. Based on the stock assessment
data for the North-East Arctic cod we estimate the effective fishing
mortality, establishing coefficients for the catchability-at-age and the
annual fishing effort. The fishing effort estimates are then...
Recreational fishermen quickly adjust fishing effort directed at a specific
site to variations in fishing quality. Holding all other quality parameters
constant, the functional relationship between fish abundance and the
resulting recreational fishing effort is denoted an effort response function.
This paper proposes a Cobb-Douglas utility function for the benefits...
Worldwide, the scientific community and international organisations have
gradually agreed on the need for an ecosystem-based approach to fishery
management. However, the practical implementation of such an approach
faces huge problems, especially in developing countries where current
fishery management systems are generally weak.
One way to improve a fishery management...
There is an increasing demand for marine space from many different economic sectors in the German coastal and exclusive economic zone: sand and gravel removal, wind farms, fisheries, shipping or oil and gas exploration. Additionally, the Natura 2000 directive requires the declaration of areas for nature con-servation. Opposite to other...
In the administration of its quota management system (QMS), New Zealand sets a “deemed value” fee that must be paid for any landings in excess of annual catch entitlements (ACE.) The deemed value system is an example of a price-capped cap-and-trade system (Roberts and Spence 1976). This paper argues that...
Species associations of fifteen major commercial groundfish species in the
northeastern Pacific ocean and their spatial and temporal characteristics were studied
using Oregon bottom trawl logbook data, 1987 to 1993. Screening procedures were used
to remove questionable data from the original logbook files, which resulted in the
exclusion of information...
Recent emphasis on linkages between essential fish habitat and fish stock productivity has raised concerns about the management of fishing activities such as trawling, which have the potential to impact fish habitat. Knowing specifically where and how intensively trawl effort has occurred over time provides ecologists with the necessary background...
Project CROOS, Collaborative Research on Oregon Ocean Salmon, is a unique partnership of scientists and commercial fishermen that combines catch location data with stock assignments obtained from genetic micro-satellite analysis to investigate the distribution of Oregon Chinook across multiple spatial scales. Using catch data collected by collaborating Oregon troll fishermen,...