FN Archimer Export Format
PT J
TI Schooling behaviour of small pelagic fish: phenotypic expression of independent stimuli
BT 
AF BREHMER, Patrice
   GERLOTTO, François
   LAURENT, Charline
   COTEL, Pascal
   ACHURY, Alina
   SAMB, Birane
AS 1:1,6;2:2;3:1;4:3;5:4;6:5;
FF 1:;2:;3:;4:;5:PDG-DOP-DCB-STH-LTH;6:;
C1 Ctr Rech Halieut Mediterraneenne & Trop, IRD, IFREMER, F-34203 Sete, France.
   Inst Mar Peru, Inst Rech Dev, La Punta, Callao, Peru.
   Inst Rech Dev, St Clotilde 97490, Reunion.
   Fdn La Salle, Estac Invest Marinas Isla Margarita, Punta De Piedras 6318, Venezuela.
   Ctr Rech Oceanog Dakar Thiaroye, Inst Senegalais Rech Agron, Dakar Thiaroye, Senegal.
C2 IRD, FRANCE
   INST MAR PERU, PERU
   IRD, FRANCE
   FDN LA SALLE, VENEZUELA
   ISRA, SENEGAL
   IFREMER, FRANCE
SI SETE
   BREST
SE PDG-DOP-DCB-STH-LTH
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-p187
   copubli-int-hors-europe
   copubli-sud
IF 2.546
TC 24
UR https://archimer.ifremer.fr/doc/2007/publication-2536.pdf
LA English
DT Article
DE ;Small pelagic fish;Schooling;Phenotypic expression;In situ observations;Echo type;Diel cycle;Behaviour
AB We compared echo sounder measurements of fish schools on Venezuelan and Senegalese coastal shelves. In both areas Sardinella aurita was the predominant aggregative species; the stocks are known to be genetically independent. Persistent school typology is described by analysing 7 acoustic surveys in Venezuela and comparing with pioneer observations in Senegal. The echo types encountered in both countries were comparable, with S. aurita and their associated species having comparable schooling behaviour. School morphology appears to be more related to species than to global characteristics of their ecosystems, as fish school descriptors were similar for both stocks. Nevertheless, S. aurita may adopt different school morphologies. Differentiation between day and night fish schools was mainly due to morphological variables, as determined by fractal dimension. Echo types were different between day and night in both Venezuela and Senegal. This analysis shows that several independent parameters can influence school morphology. However, although schooling behaviour is temporally highly variable, it shows several constant, typical 2D morphological structures, i.e. echo types. The observation of small pelagic fish schools occurring during the night is not unusual according to the literature, although a strict diurnal schooling behaviour, with scattering during the night, is often reported. Schooling behaviour appears to be a phenotypic expression depending on biotic and abiotic stimuli, intrinsic characteristics and motivation.
PY 2007
PD MAR
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-Research
VL 334
UT 000245862000025
BP 263
EP 272
ID 2536
ER

EF