Search Results - "Mahévas, S."

Using a quantitative model for participatory geo-foresight: ISIS-Fish and fishing governance in the Bay of Biscay by Provot, Z., Mahévas, S., Tissière, L., Michel, C., Lehuta, S., Trouillet, B.

“…This study investigated the use of a complex quantitative simulation model for participatory geo-foresight for the governance of the marine socio-ecosystem in…”
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An autoregressive model to describe fishing vessel movement and activity by Gloaguen, P., Mahévas, S., Rivot, E., Woillez, M., Guitton, J., Vermard, Y., Etienne, M. P.

“…The understanding of the dynamics of fishing vessels is of great interest to characterize the spatial distribution of the fishing effort and to define…”
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A Bayesian framework to objectively combine metrics when developing stressor specific multimetric indicator by Drouineau, H., Lobry, J., Delpech, C., Bouchoucha, M., Mahévas, S., Courrat, A., Pasquaud, S., Lepage, M.

“…In the context of the European Water Framework Directive (WFD), monitoring programs and related indicators have been developed to assess anthropogenic impacts…”
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Assessing the impact of artisanal and recreational fishing and protection on a white seabream ( Diplodus sargus sargus) population in the north-western Mediterranean Sea using a simulation model. Part 1: Parameterization and simulations by Hussein, C., Verdoit-Jarraya, M., Pastor, J., Ibrahim, A., Saragoni, G., Pelletier, D., Mahévas, S., Lenfant, P.

“…This study focuses on the parameterization of a model describing the dynamics of an exploited population and aims at improving management practices by…”
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Assessing the impact of artisanal and recreational fishing and protection on a white seabream ( Diplodus sargus sargus) population in the north-western Mediterranean Sea, using a simulation model. Part 2: Sensitivity analysis and management measures by Hussein, C., Verdoit-Jarraya, M., Pastor, J., Ibrahim, A., Saragoni, G., Pelletier, D., Mahévas, S., Lenfant, P.

“…In this paper, the ISIS-fish model was used to assess the impact of spatial and seasonal management measures on the dynamics of the white seabream population (…”
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Assessing the impact of discretisation assumptions in a length-structured population growth model by Drouineau, H., Mahévas, S., Bertignac, M., Fertin, A.

“…Most of the traditional assessment models are age-structured. However, many biological and exploitation processes are more length-dependent than age-dependent,…”
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Interactions between fishing strategies of Nephrops trawlers in the Bay of Biscay and Norway lobster diel activity patterns by TRENKEL, V.M, ROCHET, M.-J, MAHÉVAS, S

“…Norway lobster, Nephrops norvegicus (L.), in the Bay of Biscay exhibited diel activity patterns with more individuals outside their burrows at dawn and dusk,…”
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A future for marine fisheries in Europe (Manifesto of the Association Française d’Halieumétrie) by Gascuel, D., Bez, N., Forest, A., Guillotreau, P., Laloë, F., Lobry, J., Mahévas, S., Mesnil, B., Rivot, E., Rochette, S., Trenkel, V.

“…► To ensure the sustainable development of European Fisheries, radical changes are required. ► We define what truly implementing the ecosystem approach to…”
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Do visual transects provide true population density estimates for deepwater fish? by Trenkel, V.M., Lorance, P., Mahévas, S.

“…This study assesses the impact species ecology, fish reactions, and natural behaviour have on visual strip transect counts of deepwater fish carried out with…”
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Quantification of annual variations in fishing power due to vessel characteristics: an application to the bottom-trawlers of South-Brittany targeting anglerfish (Lophius budegassa and Lophius piscatorius) by Mahévas, S, Sandon, Y, Biseau, A

“…We present a method based on generalised linear models fitted to CPUE data to quantify the changes in fishing power in a fleet targeting a particular species…”
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Bound computation of dependability and performance measures by Mahevas, S., Rubino, G.

“…We propose a new method to obtain bounds of dependability, performance or performability measures concerning complex systems modeled by a large Markov model…”
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Availability of deep-water fish to trawling and visual observation from a remotely operated vehicle (ROV) by Trenkel, Verena M., Francis, R. I. C. Chris, Lorance, Pascal, Mahévas, Stéphanie, Rochet, Marie-Joëlle, Tracey, Dianne M.

“…Visual observations were collected using video from a remotely operated vehicle (ROV) for a number of deep-water species on the continental slope of the Bay of…”
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An autoregressive model to describe fishing vessel movement and activity by Gloaguen, P., Mahévas, S., Rivot, E., Woillez, M., Guitton, J., Vermard, Y., Etienne, M.

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Identifying fishing trip behaviour and estimating fishing effort from VMS data using Bayesian Hidden Markov Models by Vermard, Youen, Rivot, Etienne, Mahévas, Stéphanie, Marchal, Paul, Gascuel, Didier

“…Recent advances in technologies have lead to a vast influx of data on movements, based on discrete recorded position of animals or fishing boats, opening new…”
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Spatially explicit fisheries simulation models for policy evaluation by Pelletier, Dominique, Mahévas, Stéphanie

“…This paper deals with the design of modelling tools suitable for investigating the consequences of alternative policies on the dynamics of resources and…”
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Evaluation of the bioeconomic sustainability of multi-species multi-fleet fisheries under a wide range of policy options using ISIS-Fish by Pelletier, Dominique, Mahevas, Stéphanie, Drouineau, Hilaire, Vermard, Youen, Thebaud, Olivier, Guyader, Olivier, Poussin, Benjamin

“…In order to provide reliable scientific advice and support for fisheries management, it is necessary to evaluate the biological and economic sustainability of…”
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Selection and validation of a complex fishery model using an uncertainty hierarchy by Lehuta, Sigrid, Petitgas, Pierre, Mahévas, Stéphanie, Huret, Martin, Vermard, Youen, Uriarte, Andrés, Record, Nicholas R.

“…► A five-step methodology is proposed to parameterize and validate a complex fishery model. ► It combines scalability of parameters, optimization procedure and…”
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ISIS-Fish, a generic and spatially explicit simulation tool for evaluating the impact of management measures on fisheries dynamics by Mahévas, Stéphanie, Pelletier, Dominique

“…Assessing the impact of management scenarii on multi-species multi-fleet fisheries requires spatially and seasonally explicit simulation tools. No such tools…”
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A length-structured spatially explicit model for estimating hake growth and migration rates by Drouineau, Hilaire, Mahévas, Stéphanie, Bertignac, Michel, Duplisea, Daniel

“…Drouineau, H., Mahévas, S., Bertignac, M., and Duplisea, D. 2010. A length-structured spatially explicit model for estimating hake growth and migration rates…”
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Bounding asymptotic dependability and performance measures by Mahevas, S., Rubino, G.

“…One of the major drawbacks of Markov models is the size of the generated state space. Often its high value (sometimes infinite) makes the numerical analysis…”
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