|
|
|
|
|
| Menu, Clara. |
| Small pelagic fish show a general decrease in size and body condition over the past two decades in the North-East Atlantic. The underlying factors are still not well understood, however recent studies point to a bottom-up control. In order to understand how the environment impacts the main biological functions, i.e. growth, reproduction and maintenance, we adopted a bioenergetic modelling framework based on the Dynamic Energy Budget theory. To improve the robustness of our study, we chose a comparative approach between two species, Engraulis encrasicolus and Sardina pilchardus, both living in three areas, namely the English Channel, the Bay of Biscay and the Gulf of Lion. Our model is calibrated over the Bay of Biscay and then applied to the other areas,... |
| Tipo: Text |
Palavras-chave: Engraulis encrasicolus; Sardina pilchardus; Théorie Dynamic Energy Budget; Traits d'histoire de vie; Manche; Golfe de Gascogne; Golfe du Lion; Engraulis encrasicolus; Sardina pilchardus; Dynamic Energy Budget theory; Life history traits; English Channel; Bay of Biscay; Gulf of Lion. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00667/77900/80092.pdf |
| |
|
| |
|
|
| Aoki, Yoshinori; Jusup, Marko; Nieblas, Anne-elise; Bonhommeau, Sylvain; Kiyofuji, Hidetada; Kitagawa, Takashi. |
| Formal approaches to physiological energetics, such as the Dynamic Energy Budget (DEB) theory, enable interspecies comparisons by uniformly describing how individuals of different species acquire and utilise energy. We used the DEB theory to infer the energy budgets of three commercial tuna species (skipjack, Pacific bluefin, and Atlantic bluefin) throughout all stages of ontogenetic development—from an egg to an adult individual and its eggs. Energy budgets were inferred from exhaustive datasets fed into a DEB-based mathematical model tailored for tuna fish until reaching a high goodness of fit and thus reliable estimates of the model parameters. The life histories of all three species are strongly influenced by morphological and physiological adaptations... |
| Tipo: Text |
Palavras-chave: Accelerated ontogeny; Bluefin tuna; Dynamic Energy Budget theory; Ecology and evolution; Energy speculators; Skipjack tuna. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00600/71238/69605.pdf |
| |
|
|
| Huret, Martin; Tsiaras, K; Daewel, U; Skogen, Md; Gatti, Paul; Petitgas, Pierre; Somarakis, S. |
| 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.... |
| Tipo: Text |
Palavras-chave: Engraulis encrasicolus; Countergradient variation; Growth; Reproduction; Dynamic Energy Budget theory; Bay of Biscay; Aegean Sea; North Sea. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00504/61564/65489.pdf |
| |
|
|
| Pecquerie, Laure; Fablet, Ronan; De Pontual, Helene; Bonhommeau, Sylvain; Alunno-bruscia, Marianne; Petitgas, Pierre; Kooijman, Sebastiaan A. L. M.. |
| Environmental conditions experienced by aquatic organisms are archived in biogenic carbonates such as fish otoliths, bivalve shells and coral skeletons. These calcified structures present an accretionary growth and variations in optical properties - color or opacity - that are used to reconstruct time. Full and reliable exploitation of the information extracted from these structures is, however, often limited as the metabolic processes that control their growth and their optical properties are poorly understood. Here, we propose a new modeling framework that couples both the growth of a biogenic carbonate and its optical properties with the metabolism of the organism. The model relies on well-tested properties of Dynamic Energy Budget (DEB) theory. It is... |
| Tipo: Text |
Palavras-chave: Otolith; Calcification; Metabolism; Bioenergetic model; Food reconstruction; Dynamic Energy Budget theory. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00060/17082/14593.pdf |
| |
|
|
| Pethybridge, Heidi; Roos, David; Loizeau, Veronique; Pecquerie, Laure; Bacher, Cedric. |
| A size-structured, bioenergetics model was implemented to examine the effects of short-term environmental changes on European anchovy, Engraulis encrasicolus, in the North-western Mediterranean Sea. The model approach was based on Dynamic Energy Budget (DEB) theory and details the acquisition and allocation of energy (J d(-1)) during an organisms' full life-cycle. Model calibration was achieved using biometric data collected from the Gulf of Lions between 2002 and 2011. Bioenergetics simulations successfully captured ontogenetic and seasonal growth patterns, including active growth in spring/summer, loss of mass in autumn/winter and the timing and amplitude of multi-batch spawning events. Scenario analysis determined that vital rates (growth and fecundity)... |
| Tipo: Text |
Palavras-chave: Engraulis encrasicolus; NW Mediterranean Sea; Environmental variability; Dynamic Energy Budget theory; Growth; Fecundity. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00127/23822/22490.pdf |
| |
|
|
|
