Fishing Quota Management with Multiple Stock Objectives

1989 ◽  
pp. 505-527
Author(s):  
Philip A. Neher ◽  
James E. Wilen
Keyword(s):  
Quota Management

scholarly journals Partial fishing mortality per fishing trip: a useful indicator of effective fishing effort in mixed demersal fisheries

2006 ◽  
Vol 63 (3) ◽  
pp. 556-566 ◽  
Author(s):  
Adriaan D. Rijnsdorp ◽  
Niels Daan ◽  
Willem Dekker
Keyword(s):  
Fishing Effort ◽  
Fine Tuning ◽  
Positive Trend ◽  
Fishing Mortality ◽  
Auxiliary Equipment ◽  
Solea Solea ◽  
Seasonal And Spatial Variations ◽  
Sea Beam ◽  
Quota Management ◽  
Engine Power

Abstract Effort management has been proposed as an alternative for quota management in mixed demersal fisheries. It requires a metric to estimate the fishing mortality imposed by a given quantity of nominal fishing effort. Here, we estimate the partial fishing mortality rate imposed by one unit of fishing effort (Fpue) during individual fishing trips and explore the usefulness of this indicator for managing North Sea beam trawlers >300 hp targeting sole (Solea solea) and plaice (Pleuronectes platessa). Fpue is positively related to vessel engine power, and increased annually by 2.8% (sole) and 1.6% (plaice). The positive trend was due to an increase in skipper skills and investment in auxiliary equipment, the replacement of old vessels by new ones and, to a lesser extent, to upgrade engines. The average Fpue imposed per day at sea by a 2000 hp beam trawler was estimated to be 1.0 × 10−5 (sole) and 0.6 × 10−5 (plaice), and it showed substantial seasonal and spatial variations. The Fpue of sole and plaice were negatively related in summer and showed no relationship in winter. The existence of predictive seasonal and spatial patterns in Fpue opens up the possibility of fine-tuning management by directed effort restrictions and uncoupling management of plaice and sole.

scholarly journals Economic effort management in multispecies fisheries: the FcubEcon model

2010 ◽  
Vol 67 (8) ◽  
pp. 1802-1810 ◽  
Author(s):  
Ayoe Hoff ◽  
Hans Frost ◽  
Clara Ulrich ◽  
Dimitrios Damalas ◽  
Christos D. Maravelias ◽  
...  
Keyword(s):  
Single Species ◽  
Fish Stock ◽  
Economic Optimization ◽  
Management Tools ◽  
Management Framework ◽  
Fish Stocks ◽  
Effort Allocation ◽  
Multispecies Fisheries ◽  
The Past ◽  
Quota Management

Abstract Hoff, A., Frost, H., Ulrich, C., Damalas, D., Maravelias, C. D., Goti, L., and Santurtún, M. 2010. Economic effort management in multispecies fisheries: the FcubEcon model. – ICES Journal of Marine Science, 67: 1802–1810. Applying single-species assessment and quotas in multispecies fisheries can lead to overfishing or quota underutilization, because advice can be conflicting when different stocks are caught within the same fishery. During the past decade, increased focus on this issue has resulted in the development of management tools based on fleets, fisheries, and areas, rather than on unit fish stocks. A natural consequence of this has been to consider effort rather than quota management, a final effort decision being based on fleet-harvest potential and fish-stock-preservation considerations. Effort allocation between fleets should not be based on biological considerations alone, but also on the economic behaviour of fishers, because fisheries management has a significant impact on human behaviour as well as on ecosystem development. The FcubEcon management framework for effort allocation between fleets and fisheries is presented, based on the economic optimization of a fishery's earnings while complying with stock-preservation criteria. Through case studies of two European fisheries, it is shown how fishery earnings can be increased significantly by reallocating effort between fisheries in an economically optimal manner, in both effort-management and single-quota management settings.

Eels at the Edge: Science, Status, and Conservation Concerns

2009 ◽  
Keyword(s):  
New Zealand ◽  
Management System ◽  
Stock Assessment ◽  
Catch Per Unit Effort ◽  
Commercial Catch ◽  
The North ◽  
Anguilla Australis ◽  
Unit Effort ◽  
Access Rights ◽  
Quota Management

<em>Abstract.</em>—The New Zealand eel fishery comprises two species, the shortfin eel <em>Anguilla australis </em>and the New Zealand longfin eel <em>A. dieffenbachii</em>. A third species, the speckled longfin eel <em>A. reinhardtii</em>, is present in small numbers in some areas. Major fisheries in New Zealand are managed under the Quota Management System. Individual transferable quotas are set as a proportion of an annual total allowable commercial catch. The Quota Management System was introduced into the South Island eel fishery on 1 October 2000 and the North Island fishery on 1 October 2004. Freshwater eels have particular significance for customary Maori. Management policies allow for customary take and the granting of commercial access rights on introduction into the Quota Management System. Eel catches have remained relatively constant since the early 1970s. The average annual catch from 1989–1990 to 2001–2002 (fishing year) was 1,313 mt. Catch per unit effort remained constant from 1983 to 1989 and reduced from 1990 to 1999. Statistically significant declines in catch per unit effort for New Zealand longfin eel were found in some areas over the latter period. For management, an annual stock-assessment process provides an update on stock status.

Restructuring the Tasmanian rock-lobster fishery - the effect of two years of management under individual transferable quotas

2001 ◽  
Vol 52 (8) ◽  
pp. 1641 ◽  
Author(s):  
Wes Ford ◽  
Wes Ford
Keyword(s):  
Egg Production ◽  
Fishing Effort ◽  
Rock Lobster ◽  
Quota System ◽  
Individual Transferable Quotas ◽  
Fishing Vessels ◽  
Early Results ◽  
Lobster Fishery ◽  
Quota Management ◽  
One Year

Individual transferable quotas were successfully introduced into the Tasmanian rock-lobster fishery in 1998. In the two years since, significant industry restructuring has occurred. The move to quota management was intended to meet two key objectives: to reduce the catch to a sustainable level, allowing the stock to rebuild, and to provide a mechanism whereby the industry could achieve economic sustainability. The quota system has achieved early results on both the sustainability and restructuring objectives and is now well accepted and supported by the vast majority of fishers and licence holders. Its effect has been to reduce fishing effort by 29% and number of fishing vessels by 23%, and the reduction in catch has resulted in a 6% increase in the estimated biomass and substantial increases in egg production after one year. Fishers now spend fewer days at sea, and catch rates are improving. These changes are reducing fishing costs, which in time should increase profitability. Social costs of introducing quotas are that fewer fishers are employed on vessels and that fishers now find it harder and more expensive to lease a fishing licence. These costs must be factored into any assessment of the industry.

Quota exhaustion and discarding: how Ireland’s monthly quota system has a limited relationship with discarding patterns in the commercial fishing fleet

2018 ◽  
Vol 76 (1) ◽  
pp. 244-254
Author(s):  
Julia Calderwood ◽  
David G Reid
Keyword(s):  
Management System ◽  
Commercial Fishing ◽  
Quota System ◽  
Management Tools ◽  
Limited Ability ◽  
Fishing Fleet ◽  
Fishing Vessels ◽  
Gear Selectivity ◽  
Quota Management ◽  
Mixed Nature

Abstract The Irish fishing fleet is subject to monthly quotas which are designed to ensure an equal share between vessels and to spread uptake throughout the year. This monthly quota system also allows us to study the links between discarding and quota exhaustion once a month rather than once a year, as would be the case in most other countries. The hypothesis that discards of cod, haddock, and whiting would increase through the month, as quotas were used up, was tested using observer data collected from commercial fishing vessels. Other than for whiting the results showed no relationship between discarding and day of the month. Instead gear type and target fishery were bigger drivers of discarding with restrictive quotas for cod and haddock resulting in consistent discarding of these species throughout the month. Improvements in gear selectivity may aid in reducing discards but due to the mixed nature of the fishery there is limited ability for vessels to reduce catches of these quota restricted species. Understanding how such a quota management system may influence fishing and discarding behaviour is important when developing management tools to assist in avoiding unwanted catch. This is especially important with the introduction of the Landing Obligation in EU fisheries.

scholarly journals FERRY: access control and quota management service

2019 ◽  
Vol 214 ◽  
pp. 03026
Author(s):  
Mine Altunay ◽  
Joseph Boyd ◽  
Bruno Coimbra ◽  
Kenneth Herner ◽  
Krysia Jacobs ◽  
...  
Keyword(s):  
Access Control ◽  
Data Retrieval ◽  
Management Service ◽  
Job Management ◽  
Cluster Configuration ◽  
Access Control Management ◽  
Quota Management ◽  
Stored Information ◽  
Access Policies ◽  
And Storage

Fermilab developed the Frontier Experiments RegistRY (FERRY) service that provides a centralized repository for access control and job management attributes such as batch and storage access policies, quotas, batch priorities and NIS attributes for cluster configuration. This paper describes the FERRY architecture, deployment and integration with services that consume the stored information. The Grid community has developed several access control management services over the last decade. Over time, services for Fermilab experiments have required the collection and management of more access control and quota attributes. At the same time, various services used for this purpose, namely VOMS-Admin, GUMS and VULCAN, are being abandoned by the community. FERRY has multiple goals: maintaining a central repository for currently scattered information related to users' attributes, providing a Restful API that allows uniform data retrieval by services, and providing a replacement service for all the abandoned grid services. FERRY is integrated with the ServiceNow (SNOW) ticketing service and uses it as its user interface. In addition to the standard workflows for request approval and task creation, SNOW invokes orchestration that automates access to FERRY API. Our expectation is that FERRY will drastically improve user experience as well as decrease effort required by service administrators.

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