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| Chevalier, R.; Mesnil, Benoit. |
| Sorne problems encountered in estimating the age structure of landings from fish market samplinq are reviewed in this document. Being perequisite to the definition of on optimal sampling strategy, the selection of a sampling scheme and the choice of the estimators are discussed. The definition of an objective function to optimize is also critical. We have used an average of instantaneous fishing mortality rates obtained from a (pseudo- ) cohort analysis. More elaborate functions can be envisaoed. |
| Tipo: Text |
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| Ano: 1986 |
URL: https://archimer.ifremer.fr/doc/00503/61478/65258.pdf |
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| Chevalier, R.; Gondeaux, E.; Koutsikopoulos, C.; Mesnil, Benoit. |
| Thè present document is a compilation of the topics presented during an introductory course to sampling techniques held in the IFREMER center of Nantes (17-21 October 1988). The purpose of this course was a presentation of some basic elements of the sampling theory followed by a description and practice of the principal sampling techniques. After an introoduction th the sampling theory the floowing sampling techniques were presented : simple Random Sampming, Ratio estimator, Stratified sampling, Cluster Sampling and Multistages Sampling. Two supplments with the basic mathematical and statistical notions used in this document are also included. |
| Tipo: Text |
Palavras-chave: Teechniques de sondage; Sampling techniques. |
| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00450/56177/57725.pdf |
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