Comparison of geostatistical and random sample survey analyses of Antarctic krill acoustic data

Data from the acoustic surveys of MV SA ‘‘Agulhas’ ’ and FRV ‘‘Walther Herwig’’, and the 1981 RRS ‘‘John Biscoe’ ’ South Georgia acoustic survey were analysed by geostatistical methods. Estimates of mean density (g m �2) of krill and their variances are compared with published results from statistic...

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Bibliographic Details
Main Author: A. W. A. Murray
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 1996
Subjects:
pattern
stock assessment
Antarctic
Biscoe
Antarc*
Antarctic Krill
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.384.3233
http://mmc2.geofisica.unam.mx/cursos/geoest/Articulos/Geostatistics/Comparison of geostatistical and random sample survey analyses.pdf
Description
Summary:Data from the acoustic surveys of MV SA ‘‘Agulhas’ ’ and FRV ‘‘Walther Herwig’’, and the 1981 RRS ‘‘John Biscoe’ ’ South Georgia acoustic survey were analysed by geostatistical methods. Estimates of mean density (g m �2) of krill and their variances are compared with published results from statistical analyses based on random sampling theory. A further high-resolution geostatistical analysis of the MV SA ‘‘Agulhas’ ’ (ping-by-ping) data set of the density of each individual aggregation is also presented. These analyses illustrate the problems of applying geostatistical methods to data from highly aggregated species which can show marked skewness in their histogram of density.

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