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Ratio-dependent predator–prey models set up a challenging issue regarding their dynamics near the origin. This is due to the fact that such models are undefined at (0, 0). We study the analytical behavior at (0, 0) for a common ratio-dependent model and demonstrate that this equilibrium can be either a saddle point or an attractor for certain trajectories.… (More)

- Ovide Arino
- SIAM Review
- 1996

- Ovide Arino, Yunne-Jai Shin, Christian Mullon
- Comptes rendus biologies
- 2004

Taking into account a predator/prey size ratio in a size-structured population model leads to a partial derivative equation of which we study the properties. By expliciting the structure of the attractor of this equation, it is shown that a simple mechanism, size-based opportunistic predation, can explain the stability in the shape of size spectra observed… (More)

- Eva Sánchez, Ovide Arino, Pierre Auger, Rafael Bravo de la Parra
- SIAM Journal of Applied Mathematics
- 2000

- Ovide Arino, Ryszard Rudnicki
- Comptes rendus biologies
- 2004

We present a model of the phytoplankton dynamics. The distribution of the size of the phytoplankton aggregates is described by a non-linear transport equation that contains terms responsible for the growth of phytoplankton aggregates, their fragmentation and coagulation. We study asymptotic behaviour of moments of the solutions and we explain why… (More)

- Khashayar Pakdaman, C. Grotta-Ragazzo, C. P. Malta, Ovide Arino, Jean-François Vibert
- Neural Networks
- 1998

- Stephanie Portet, Ovide Arino, Jany Vassy, Damien Schoëvaërt
- Journal of theoretical biology
- 2003

The cytoskeleton is a dynamic three-dimensional structure mainly located in the cytoplasm. It is involved in many cell functions such as mechanical signal transduction and maintenance of cell integrity. Among the three cytoskeletal components, intermediate filaments (the cytokeratin in epithelial cells) are the best candidates for this mechanical role. A… (More)

- Jalila El Ghordaf, Moulay L. Hbid, Ovide Arino
- Comptes rendus biologies
- 2004

The paper provides a mathematical study of a model of urban dynamics, adjusting to an ecological model proposed by Lotka and Volterra. The model is a system of two first-order non-linear ordinary differential equations. The study proposed here completes the original proof by using the main tools such as a Lyapunov function.

- Mustapha Yebdri, Sidi Mohammed Bouguima, Ovide Arino
- Applied Mathematics and Computation
- 2005

- Ovide Arino
- SIAM Review
- 1992