TAILIEUCHUNG - Fish Stock Assessment Manual

Rai & Tripathi (2009a) added that most metals in aquatic environment associated with particulate matter, then settled and accumulated in the bed sediments. The accumulation of contaminant in the bed sediments and the remobilization of contaminant are the most important mechanisms of contaminant in an aquatic ecosystem regulation. Furthermore, under certain circumstances such as deficit in dissolved oxygen or decreased in pH, the bed sediments can be another source of secondary water pollution when the heavy metals from bed sediments are released | Fish Stock Assessment Manual FAO FISHERIES TECHNICAL PAPER 393 by Emygdio L. Cadima Consultant FAO Fisheries Department DANIDA Rome 2003 PREPARATION OF THIS DOCUMENT The author Emygdio Cadima now retired was an FAO scientist in the Fisheries Department until 1974 when he returned to the Instituto de Investigaẹão das Pescas e do Mar IPIMAR in Portugal having also been a Professor at the University of Algarve until 1997. At the end of 1997 he was the lecturer of a course in Fish Stock Assessment in IPIMAR which became the basis for the preparation of this manual requested and supported by the Project FAO DANIDA GCP INT 575 DEN. This manual also incorporates notes from courses in Fish Stock Assessment held at several different venues in the world mainly in Europe Latin America and Africa. These courses had an active collaboration of fisheries scientists from all over the world especially Portugal. These scientists are also co-responsible for the orientation for the matters treated and particularly for the elaboration of the exercises. This manual aims to present the basic knowledge on the problems and methods of fish stock assessment to young scientists post-graduate students and PhD students. This is a scientific area in permanent development where the knowledge of fisheries biology is applied in order to make a rational and sustained exploitation of the fishing resources. The Manual of Fish Stock Assessment is mainly concerned with the theoretical aspects of the most used models for fish stock assessment. The practical application . the exercises solved in a spreadsheet is considered as a complementary part to help the understanding of the theoretical matters. The editing of the manuscript was made by Siebren Venema manager of Project GCP INT 575 DEN and Ana Maria Caramelo Fishery Resources Officer in the FAO Fisheries Department. Distribution DANIDA Fisheries Education Institutes Marine Research Institutes National and International Organizations Universities .

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