@article{fdi:010064706,
  title = {{I}nfluence of environmental variability and age on the body condition of small pelagic fish in the {G}ulf of {L}ions},
  author = {{B}rosset, {P}. and {M}{\'e}nard, {F}r{\'e}d{\'e}ric and {F}romentin, {J}. {M}. and {B}onhommeau, {S}. and {U}lses, {C}. and {B}ourdeix, {J}. {H}. and {B}igot, {J}. {L}. and {V}an {B}everen, {E}. and {R}oos, {D}. and {S}araux, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{E}ndogenous and environmental variables are fundamental in explaining variations in fish condition. {B}ased on more than 20 yr of fish weight and length data, relative condition indices were computed for anchovy and sardine caught in the {G}ulf of {L}ions. {C}lassification and regression trees ({CART}) were used to identify endogenous factors affecting fish condition, and to group years of similar condition. {B}oth species showed a similar annual cycle with condition being minimal in {F}ebruary and maximal in {J}uly. {CART} identified 3 groups of years where the fish populations generally showed poor, average and good condition and within which condition differed between age classes but not according to sex. {I}n particular, during the period of poor condition (mostly recent years), sardines older than 1 yr appeared to be more strongly affected than younger individuals. {T}ime-series were analyzed using generalized linear models ({GLM}s) to examine the effects of oceanographic abiotic (temperature, {W}estern {M}editerranean {O}scillation [{W}e{MO}] and {R}hone outflow) and biotic (chlorophyll a and 6 plankton classes) factors on fish condition. {T}he selected models explained 48 and 35% of the variance of anchovy and sardine condition, respectively. {S}ardine condition was negatively related to temperature but positively related to the {W}e{MO} and mesozooplankton and diatom concentrations. {A} positive effect of mesozooplankton and {R}hone runoff on anchovy condition was detected. {T}he importance of increasing temperatures and reduced water mixing in the {NW} {M}editerranean {S}ea, affecting planktonic productivity and thus fish condition by bottom-up control processes, was highlighted by these results. {C}hanges in plankton quality, quantity and phenology could lead to insufficient or inadequate food supply for both species.},
  keywords = {{A}nchovy ; {S}ardine ; {R}elative condition factor ; {NW} {M}editerranean {S}ea ; {E}ndogenous effect ; {E}nvironmental effect ; {MEDITERRANEE} ; {GOLFE} {DU} {LION}},
  booktitle = {},
  journal = {{M}arine {E}cology {P}rogress {S}eries},
  volume = {529},
  numero = {},
  pages = {219--231},
  ISSN = {0171-8630},
  year = {2015},
  DOI = {10.3354/meps11275},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064706},
}