FN Archimer Export Format
PT J
TI Tuna aggregation dynamics at Drifting Fish Aggregating Devices: a view through the eyes of commercial echosounder buoys
BT 
AF Baidai, Yannick
   DAGORN, Laurent
   Amandè, Monin J
   Gaertner, Daniel
   Capello, Manuela
   Proud, Roland
AS 1:1,2;2:1;3:2;4:1;5:1;6:;
FF 1:;2:;3:;4:;5:;6:;
C1 MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
   Centre de Recherches Océanologiques (CRO), 29 rue des pêcheurs, BPV 18, Abidjan, Côte d’Ivoire
C2 IRD, FRANCE
   CRO, COTE IVOIRE
UM MARBEC
IN WOS Cotutelle UMR
   copubli-int-hors-europe
   copubli-sud
IF 3.593
TC 8
UR https://archimer.ifremer.fr/doc/00659/77063/80155.pdf
LA English
DT Article
DE ;absence times;associative behaviour;colonization times;Drifting Fish Aggregating Devices (DFADs);echosounder buoys;residence times;tropical tunas
AB This study addresses novel questions on the dynamics of tuna aggregations around floating objects, using echosounder buoys data collected throughout the drifts of newly deployed Drifting Fish Aggregating Devices (DFADs) in the Atlantic Ocean (AO) and Indian Ocean (IO). Time series of presence/absence of tunas were obtained by supervised classification of acoustic data. To avoid biases related to the variability in individual DFAD soak times, a new approach was developed to estimate the average colonization time of new DFADs by tuna aggregations. We showed that tunas colonize DFADs after an average of 16 days in the AO, and 40 days in the IO. Moreover, the analysis indicated that the time span during which tuna aggregations occupy DFADs is driven by a time-independent process with short- and long-term residence modes. On average, DFADs were continuously occupied by tuna aggregations for 6 and 9 days in the IO and AO, respectively. The time between two consecutive aggregations at the same DFAD averaged 9 days in the IO and 5 days in the AO. Throughout their soak time after being colonized, DFADs remained occupied for a larger proportion of time in the AO (63%) than in the IO (45%). 
PY 2020
PD DEC
SO Ices Journal Of Marine Science
SN 1054-3139
PU Oxford University Press (OUP)
VL 77
IS 7-8
UT 000610522000051
BP 2960
EP 2970
DI 10.1093/icesjms/fsaa178
ID 77063
ER

EF