Inter-Research > MEPS > v617-618 > p95-112  
Marine Ecology Progress Series

via Mailchimp

MEPS 617-618:95-112 (2019)  -  DOI:

Variation in life-history traits of European anchovy along a latitudinal gradient: a bioenergetics modelling approach

Martin Huret1,*, Kostas Tsiaras2, Ute Daewel3, Morten D. Skogen4, Paul Gatti1, Pierre Petitgas5, Stelios Somarakis6

1Ifremer, STH/LBH, 29280 Plouzané, France
2Hellenic Centre for Marine Research, Anavyssos, Greece
3Helmholtz Centre Geesthacht, Institute of Coastal Research, 21502 Geesthacht, Germany
4Institute of Marine Research, 5817 Bergen, Norway
5Ifremer, EMH, 44311 Nantes, France
6Hellenic Centre for Marine Research, Heraklion, Greece
*Corresponding author:
Advance View was available online July 17, 2018

ABSTRACT: Anchovy Engraulis encrasicolus distribution in European waters spans from the Mediterranean Sea to the North Sea, and is expected to expand further north with global warming. Observations from the eastern Mediterranean (North Aegean Sea), the Bay of Biscay and the North Sea reveal latitudinal differences in growth, maximum size, fecundity and timing of reproduction. We set up a mechanistic framework combining a bioenergetics model with regional physical-biogeochemical models providing temperature and zooplankton biomass to investigate the underlying mechanisms of variation in these traits. The bioenergetics model, based on the Dynamic Energy Budget theory and initially calibrated in the Bay of Biscay, was used to simulate growth and reproduction patterns. Environment partly explained the increased growth rate and larger body size towards the north. However, regional calibration of the maximum assimilation rate was necessary to obtain the best model fit. This suggests a genetic adaptation, with a pattern of cogradient variation with increasing resource towards the north, in addition to a countergradient thermal adaptation. Overall, the seasonal energy dynamics supports the pattern of body-size scaling with latitude, i.e. food-limited growth but low maintenance costs in the warm Aegean Sea, and larger size in the North Sea allowing sufficient storage capacity for overwintering. Further, the model suggests a synchronisation of reproductive timing with environmental seasonality as a trade-off between thresholds of temperature and reserves for spawning and overwintering, respectively. Finally, low temperature, short productive and spawning seasons, and insufficient reserves for overwintering appear to be current limitations for an expansion of anchovy to the Norwegian Sea.

KEY WORDS: Engraulis encrasicolus · Countergradient variation · Growth · Reproduction · Dynamic Energy Budget theory · Bay of Biscay · Aegean Sea · North Sea

Full text in pdf format
Cite this article as: Huret M, Tsiaras K, Daewel U, Skogen MD, Gatti P, Petitgas P, Somarakis S (2019) Variation in life-history traits of European anchovy along a latitudinal gradient: a bioenergetics modelling approach. Mar Ecol Prog Ser 617-618:95-112.

Export citation
Share:    Facebook - - linkedIn

 Previous article Next article