FN Archimer Export Format
PT J
TI Three dimensional characteristics of young-of-year pelagic fish schools in lake
BT 
AF GUILLARD, Jean
   BREHMER, Patrice
   COLON, Michel
   GUENNEGAN, Yvon
AS 1:1;2:2;3:1;4:3;
FF 1:;2:;3:;4:PDG-DOP-DCM-HMT-RHSETE;
C1 INRA, UMR CARRTEL, F-74203 Thonon Les Bains, France.
   IRD, CRHMT UR 109, F-34203 Sete, France.
   IFREMER, CRHMT, F-34203 Sete, France.
C2 INRA, FRANCE
   IRD, FRANCE
   IFREMER, FRANCE
SI SETE
SE PDG-DOP-DCM-HMT-RHSETE
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-p187
IF 1.247
TC 18
UR https://archimer.ifremer.fr/doc/2006/publication-1661.pdf
LA English
DT Article
DE ;Annecy Lake;Rutilus rutilus;Perca fluviatilis;Sonar;3 D structure;Shoaling behaviour
AB Fish schools are aggregative structures encountered in all types of aquatic environments but have as yet been little studied in freshwaters except at small spatial scales. This study represents the three dimensional description of juvenile fish schools (Perca fluviatilis and Rutilus rutilus) in a lake environment using high resolution multibeam sonar system operating at a frequency of 455 kHz, composed of 60 beams of 1.5 degrees allowing a 90 degrees observation plane. The in situ diurnal schooling behaviour of young-of-the-year fish of both species is confirmed. The morphological, energetic and spatial variables of these schools are described and related to one another. The structures described are of the same order of magnitude as those described in the marine environment. The school shape is elliptical, they are shallow and they display a temporal and spatial stability over the Course of a day but a highly variable morphology. The number of vacuoles, a descriptor of the internal morphology of the schools, was found to be significantly (p < 0.01) correlated with the volume of the school, and showed two distinct relationships, with proportions similar to the percentage occurrence of both species sampled by a pelagic trawl. The relation may be efficient for fish species discrimination by 3-D acoustics methods in this lake with two main aggregative fish species.
PY 2006
PD APR
SO Aquatic Living Resources
SN 0990-7440
PU EDP Sciences
VL 19
IS 2
UT 000238682700003
BP 115
EP 122
DI 10.1051/alr:2006011
ID 1661
ER

EF