## 1 Introduction  
The global changes which affect the Earth have more important consequences in closed spaces. This is the case of the Mediterranean Sea, and especially in the island area. In relation to this subject, in 2010 the University of Corsica decided to create the **S**ustainable **TE**echnologies for **L**ittora**L **A**quaculture and **MA**rine **RE**search (STELLA MARE) scientific platform. This research center hasbeen certified by the National Centre for Scientific Research (CNRS), and this platform became the Mixed Services Unit (UMS) 3514 Stella Mare University of Corsica/CNRS. This unit is specialized in Marine and Littoral Ecological Engineering. In this way, we have defined, in interaction with the professional fishing industry, species to be studied both in laboratories and _in situ_. In this paper, we present our works focused on the behavioral of crustacean species, more particularly the case of _Maja squinado_. This species, very appreciated (real economic interest), is now weakened and protected by order n\({}^{\circ}\) 323/2004/DRAM. Better knowledge of the behavior of this crustacean family could help define a strategic protection and development scheme. To obtain our results, we have used an active tracking tool. This monitoring allows us to cross a first step in the follow-up of _Maja squinado_ in real situations. Furthermore, this methodology could be applied to others species like lobsters (_Homarus gammarus_), spiny lobsters (_Palinurus elephas_), and also fishes.  
Our objective is the modeling and simulation of the behavior of the _Maja squinado_. However we don't have enough data to build a model. The first step of this project is to monitor the behavior of this species based on acoustic telemetry and build a database. Our study of this species is based on the work already done in Galicia (Atlantic coast of Spain) by [PERSON] [1, 2, 3].  
Numerous behavioral studies of marine species have led to a rapid development of new applications for acoustic telemetry [4, 5, 6]. To learn more about the life cycle of an aquatic species, resource utilization and its ecological role in an ecosystem, it is essential to accurately track its movements more or less long term [6, 7].  
Over the past 30 years, acoustic telemetry providers have developed different approaches to medium baseline high resolution acoustic positioning systems. Active tracking and passive acoustic monitoring have become powerful tools to quantify complex movements on different spatial and temporal scales (e.g., [6, 8, 9, 10]). While active monitoring can provide precise movement information on a few individuals in a short period, passive monitoring is used to quantify the information of several individuals (presence-absence data) in the longer term. Although less expensive in terms of resources and time, passive monitoring don't allow data acquisition and position tracking as accurately as active tracking [10, 11]. However, the new positioning systems allow one to accurately track several individuals [12, 13, 14], but a monitoring program using hydrophones in a delimited area, implies that we already know the behavior of the studied species. In our case, we can't use this system because we don't know if spider crab would stay in the same area or travel great distances.  
The paper is organized as follows: in Section 2, we introduce some information on the studied species, materials and methods of these series of experiments. Section 3 shows the results under different use configurations. In Section 4, an analysis and a critique of the results are presented, and we conclude the paper in Section 5.