Some programs for growth estimation in fisheries biology

Stata Technical Bulletin, 1996

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2010

The assessment of quality of economic data is a relevant issue that has been raised by several working groups and by different bodies (first of all STECF and RCMs). This issue also affects end users that should be aware of the reliability of data used in the analysis. The new Data Collection Framework establishes the list of economic variables to be collected for the total fleets and for the fleet segments. It also requires Member States to describe the methodologies applied for the data collection and to give information on the quality (accuracy and precision) of estimates. Thus, SGECA 09-02 was asked to give appropriate recommendations and proposals in order to homogenise the presentation of National Programmes and also in order to facilitate the STECF task to evaluate the quality of the data collected by the Member States. Moreover, the Regional Co-ordination Meetings held in 2008 identified several issues within the new DCF requiring further work or clarification. Thus, this rep...

2010

The mission of the Institute for the Protection and Security of the Citizen (IPSC) is to provide research results and to support EU policy-makers in their effort towards global security and towards protection of European citizens from accidents, deliberate attacks, fraud and illegal actions against EU policies The Scientific, Technical and Economic Committee for Fisheries (STECF) has been established by the European Commission. The STECF is being consulted at regular intervals on matters pertaining to the conservation and management of living aquatic resources, including biological, economic, environmental, social and technical considerations. European Commission Joint Research Centre Institute for the Protection and Security of the Citizen Contact information Address: TP 051,

2020

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2017

The Management of Wageningen Marine Research is not responsible for resulting damage, as well as for damage resulting from the application of results or research obtained by Wageningen Marine Research, its clients or any claims related to the application of information found within its research. This report has been made on the request of the client and is wholly the client's property.

2006

St. Eustatius M arine Park was established in 1996 and became actively managed in 1997 to conserve and protect the marine environment. It consists of a general use area and two no-take reserves. The purpose of this study is to collect baseline data regarding fish stock populations within the marine park and its reserves in order to evaluate the success or otherwise of the environmental management strategies of the M arine Park. Questionnaires and semi-structured interviews were conducted with eleven fishermen on the island in order to learn more about the St. Eustatius fisheries and to examine changes that have taken place within the last ten years. A visual fish census of the coral reefs was also carried out at sixteen dive sites. The abundance and diversity of fish species were observed, along with length estimations in order to determine the standing stock and population size structure of specific species. The Southern Reserve of the M arine Park was observed as having the most abundant fish population and on average, between twenty and thirty species were observed at each of the dive sites surveyed. Blair's Reef was identified as being the most diverse with over thirty-five species being observed. The diversity of the fish population in St. Eustatius has been proven to have increased dramatically in the last thirteen years, with the number of species currently present in the waters being on average 4.9 times greater than the number observed in 1992 at the same locations. When asked about the changes in the coral reefs and the fish populations over the past ten years, half of the fishermen said they saw no changes, while the other half said they had seen positive changes, citing more fish and less anchor damage. This clearly indicates that the establishment of the M arine Park nine years ago has been beneficial to the fish population within the local waters.

Scandinavian Journal of Statistics, 2002

Decisions concerning the management of fisheries are founded on confidence statements for interest parameters such as biomass and exploitation rate, derived from complex structural models that describe the dynamics of fisheries. We identify four generic statistical issues and focus on how they impact on the reliability of those confidence statements: (a) parameters for which the data have little or no information; (b) competing structural relationships; (c) weighting of observations; and (d) alternative methods for computing confidence statements. Our purpose is to give an exposition of how these issues impact on fisheries' analyses, with the intent of stimulating thought on more effective alternatives. We describe the fisheries' management context and use two specific studies to illustrate how these generic statistical issues impact on fisheries assessment results. It is demonstrated that these statistical issues can have a profound impact on fishery management decisions and that established approaches to handle them have not been fully developed.

2009

The Scientific, Technical and Economic Committee for Fisheries hold its 32 nd plenary on 9-13 November 2009 in Brussels. The terms of reference included both issues assessments of STECF working group reports and additional requests submitted to the STECF by the Commission. Topics dealt with ranged from fisheries economics to management plan evaluation issues. How to obtain EU publications Our priced publications are available from EU Bookshop (http://bookshop.europa.eu), where you can place an order with the sales agent of your choice. The Publications Office has a worldwide network of sales agents. You can obtain their contact details by sending a fax to (352) 29 29-42758.