FN Archimer Export Format
PT J
TI Spatially explicit estimation of fish length histograms, with application to anchovy habitats in the Bay of Biscay
BT 
AF PETITGAS, Pierre
   DORAY, Mathieu
   MASSE, Jacques
   GRELLIER, Patrick
AS 1:1;2:1;3:1;4:1;
FF 1:PDG-RBE-EMH;2:PDG-RBE-EMH;3:PDG-RBE-EMH;4:PDG-RBE-EMH;
C1 IFREMER, Dept Ecol & Models Fisheries, F-44300 Nantes, France.
C2 IFREMER, FRANCE
SI NANTES
SE PDG-RBE-EMH
IN WOS Ifremer jusqu'en 2018
IF 2.007
TC 11
UR https://archimer.ifremer.fr/doc/00049/16042/13581.pdf
LA English
DT Article
CR PEL 2000
   PEL 2001
   PELGAS 2002
   PELGAS 2003
   PELGAS 2004
   PELGAS 2005
   PELGAS 2006
   PELGAS 2007
   PELGAS 2008
   PELGAS 2009
   PELGAS 2010
BO Thalassa
DE ;co-kriging;European anchovy;fish length;functional kriging;habitat;mapping curves
AB Fish length frequency histograms from research surveys are of prime importance for identifying habitats of different life stages, as well as for stock assessment. However, no method has thus far been available for mapping these histograms as spatially varying curves. Here, a procedure is applied to map spatially connected curves, and detail is given on how it can be applied to map the length frequency histograms. At each sample location, a fish length frequency histogram is given as a vector of non-independent values. The histogram is first modelled as a polynomial expansion on the basis of orthogonal polynomials. Then, the polynomial coefficients are mapped by co-kriging, after fitting a model of co-regionalization. The length frequency map is finally derived by linearly combining maps of polynomial coefficients. An estimation variance associated with the map is also derived. Maps of anchovy length distributions are produced by applying the method to midwater trawl length data from the PELGAS acoustic surveys in the Bay of Biscay. This novel approach extends the application of kriging techniques to curves or functions, opening new perspectives for mapping more complex information than just the values of fish density.
PY 2011
PD NOV
SO Ices Journal Of Marine Science
SN 1054-3139
PU Oxford Univ Press
VL 68
IS 10
UT 000295985500012
BP 2086
EP 2095
DI 10.1093/icesjms/fsr139
ID 16042
ER

EF