FN Archimer Export Format
PT J
TI A fisheries acoustic multi-frequency indicator to inform on large scale spatial patterns of aquatic pelagic ecosystems
BT 
AF TRENKEL, Verena
   BERGER, Laurent
AS 1:1;2:2;
FF 1:PDG-RBE-EMH;2:PDG-IMN-NSE-AS;
C1 IFREMER, F-44311 Nantes 3, France.
   IFREMER, F-29280 Plouzane, France.
C2 IFREMER, FRANCE
   IFREMER, FRANCE
SI NANTES
   BREST
SE PDG-RBE-EMH
   PDG-IMN-NSE-AS
IN WOS Ifremer jusqu'en 2018
IF 3.23
TC 18
UR https://archimer.ifremer.fr/doc/00128/23886/21848.pdf
LA English
DT Article
CR PELGAS 2006
   PELGAS 2007
   PELGAS 2008
   PELGAS 2009
   PELGAS 2010
BO Thalassa
DE ;Acoustics;Frequency response curve;Monitoring;EOF;Ecosystem state
AB Fisheries acoustic instruments provide information on four major groups in aquatic ecosystems: fish with and without swim bladder (tertiary and quaternary consumers), fluidlike zooplankton (secondary consumers) and small gas bearing organisms such as larval fish and phytoplankton (predominantly primary producers). We entertain that this information is useable to describe the spatial structure of organism groups in pelagic ecosystems. The proposal we make is based on a multi-frequency indicator that synthesises in a single metric the shape of the acoustic frequency response of different organism groups, i.e. the dependence of received acoustic backscattered energy on emitting echosounder frequency. We demonstrate the development and interpretation of the multi-frequency indicator using simulated data. We then calculate the indicator for acoustic water-column survey data from the Bay of Biscay and use it to create reference maps for the spatial structure of the four scattering groups as well as their small scale spatial variability. These maps provide baselines for monitoring future changes in the structure of the pelagic ecosystem.
PY 2013
PD JUN
SO Ecological Indicators
SN 1470-160X
PU Elsevier Science Bv
VL 30
UT 000318191800010
BP 72
EP 79
DI 10.1016/j.ecolind.2013.02.006
ID 23886
ER

EF