FN Archimer Export Format
PT J
TI Bioenergetic condition of anchovy and sardine in the Bay of Biscay and English Channel
BT 
AF GATTI, Paul
   COMINASSI, Louise
   DUHAMEL, Erwan
   GRELLIER, Patrick
   LE DELLIOU, Herve
   LE MESTRE, Sophie
   PETITGAS, Pierre
   RABILLER, Manuella
   SPITZ, Jerome
   HURET, Martin
AS 1:1;2:1;3:2;4:3;5:4;6:1;7:3;8:3;9:5;10:1;
FF 1:PDG-RBE-STH-LTBH;2:;3:PDG-RBE-STH-LTBH;4:PDG-RBE-EMH;5:PDG-RBE-PFOM-LARN;6:PDG-RBE-STH-LBH;7:PDG-RBE-EMH;8:PDG-RBE-EMH;9:;10:PDG-RBE-STH-LBH;
C1 Ctr Ifremer Bretagne, Unite Sci & Technol Halieut, Lab Biol Halieut, ZI Pointe Diable CS 10070, F-29280 Plouzane, France.
   Stn Ifremer Lorient, Unite Sci & Technol Halieut, Lab Technol & Biol Halieut, 8 Rue Francois Toullec, F-56100 Lorient, France.
   Ifremer Nantes, Unite Ecol & Modeles Halieut, Rue Ile dYeu,BP 21105, F-44300 Nantes 3, France.
   Ctr Ifremer Bretagne, Unite Physiol Fonct Organismes Marins, Lab Adaptat Reprod & Nutr Poisson, ZI Pointe Diable CS 10070, F-29280 Plouzane, France.
   Univ La Rochelle, CNRS, UMS 3462, Observ PELAGIS, 5 Allees Ocean, F-17000 La Rochelle, France.
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   UNIV LA ROCHELLE, FRANCE
SI LORIENT
   BREST
   NANTES
SE PDG-RBE-STH-LTBH
   PDG-RBE-PFOM-LARN
   PDG-RBE-EMH
   PDG-RBE-STH-LBH
UM LEMAR
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 3.245
TC 18
UR https://archimer.ifremer.fr/doc/00416/52754/53615.pdf
LA English
DT Article
CR CAMANOC
   EVHOE 2014
   PELGAS 2014
BO Thalassa
DE ;Energy density;Calorimetry;Small pelagic fish;Engraulis encrasicolus;Sardina pilchardus;Northeast Atlantic
AB There is a growing interest in monitoring body condition of marine organisms in the context of the ecosystem approach to fisheries and global change. Fish condition is under the influence of environmental variability on seasonal scale, but also on longer timescales. It represents a good indicator of habitat quality or individual fitness, and is also a relevant parameter to evaluate energy transfer through the trophic chain. However, the sources of variability in fish condition need to be accurately understood and the significance of existing indices has to be correctly assessed. Here, we measured the energy density, a precise and global indicator of fish bioenergetic condition, for anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) in the Bay of Biscay and the English Channel, based on an extensive sampling design in 2014. First, we investigated the well-documented relationship between percent dry mass and energy density, and showed that such relationship is species specific. Second, we observed distinct patterns in bioenergetic condition between anchovy and sardine. Both species display similar minimum values at size or age but maximum are significantly higher for sardine, reflecting a higher energy storage capacity that scales more strongly with size. Third, we confirmed the large seasonal variability in energy density of both species. In the Bay of Biscay, energy density values for anchovy and sardine (age 1+) are 5.7 and 5.9 kJ.g-1 (wet weight) in spring and 6.8 and 7.9 kJ.g-1 in autumn, respectively. Our results revealed that fish from the English Channel display significantly higher energy density values in autumn (9.8 kJ.g-1 for anchovy and 10.5 kJ.g-1 for sardine) than those from the Bay of Biscay. When combined with size and weight at age it appears clearly that, after age 1, fish from the northern region display larger growth and energy reserves. This likely results from a higher zooplankton productivity in the English Channel or/and a selection pressure towards faster growing and faster reserve building individuals, to be able to survive a longer winter than in the Bay of Biscay. Finally, we described a dome shaped evolution of energy density with body size in case of sardine. Increase with size has been well documented but not the decrease at largest sizes. Several mechanisms may explain such a pattern, i.e. increasing investment in spawning, shift in diet or a metabolic trade-off between temperature and food availability, with regard to maintenance requirements. 
PY 2018
PD SEP
SO Progress In Oceanography
SN 0079-6611
PU Pergamon-elsevier Science Ltd
VL 166
UT 000442979000013
BP 129
EP 138
DI 10.1016/j.pocean.2017.12.006
ID 52754
ER

EF