FN Archimer Export Format
PT J
TI Effect of a Transducer Horizontality Default on Lake Fish Stock Assessment
BT 
AF Blanluet, Arthur
   Goulon, Chloe
   Lebourges-Dhaussy, Anne
   Eymar-Dauphin, Pauline
   Guillard, Jean
AS 1:1;2:1;3:2;4:1;5:1;
FF 1:;2:;3:;4:;5:;
C1 CARRTEL, INRAE, Univ. Savoie Mont Blanc, 74200, Thonon-les-Bains, France
   LEMAR, IRD, UBO, CNRS, Ifremer, 29280, Plouzane, France
C2 INRAE, FRANCE
   IRD, FRANCE
UM LEMAR
IN WOS Cotutelle UMR
   copubli-france
IF 1.5
TC 1
UR https://archimer.ifremer.fr/doc/00653/76551/77714.pdf
LA English
DT Article
DE ;Fisheries acoustics;Freshwater;Transducer miss-alignment
AB reshwater hydroacoustic surveys are frequently performed with small research boats. Thus, the transducer, usually fixed on a pole on the side of the boat, could be misaligned with the horizontal axis (i.e., the lake surface). Given that fish acoustic responses are strongly directional, the transducer angle could induce attenuation of their backscattering strengths. To test the influence of a small shift of the transducer orientation, we compared hydroacoustics estimates from two sampling nights on the Lake Annecy: the first one being a transducer angle of 1.5∘ with the horizontal and the second one being strictly horizontal. We showed that the effect of such an angle is negligible over the sampling variability on the TS distribution of the fish population and the biomass assessment. We conclude that a small shift in the transducer horizontality (≤1.5∘) will not degrade the quality of the acoustic data. 
PY 2020
PD DEC
SO Acoustics Australia
SN 0814-6039
PU Springer Science and Business Media LLC
VL 48
IS 3
UT 000574061000001
BP 473
EP 479
DI 10.1007/s40857-020-00206-1
ID 76551
ER

EF