ALESSI , Jessica

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Monitoring trends of animal population is known as an essential part of conservation issues. Although individuals of many cetacean species have distinctive natural variation in appearance which allows identification of individuals through field photography of free-ranging individuals, the use of mark-recapture methods involves several...

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Le grand dauphin (Tursiops truncatus) est une espèce opportuniste, principalement ichtyophage, pouvant se nourrir de poissons, céphalopodes et crustacés appartenant au domaine nectonique et benthonique. Les interactions entre pêche et grand dauphin sont fréquemment observées et documentées, cela, quelques soient les techniques de pêche...

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In the framework of the PROMETEOS project, 64 seamounts were identified in Tyrrhenian Sea and specific morphological characteristics have been calculated for each seamount. Random Forest regression technique has been applied to striped dolphin distribution aiming at assessing importance and effect of seamounts on this species. A total of 467...

Seamounts are expected to attract pelagic top predators due to the higher abundance of possible prey aggregating around these structures. The importance of seamounts on benthic fauna and bottom fish is vastly documented, while little is known about their role as possible hotspots of pelagic biodiversity. This aspect is poorly investigated in...

1. The Mediterranean sperm whale sub-population is classified as endangered by the IUCN. The conservation management of this species demands further knowledge of its habitat use. 2. In this study, a generalized additive model was used to evaluate the spatial distribution of sperm whales in the Pelagos Sanctuary. 3. The results suggested a...

Within the framework of the EU Life+ project named LIFE09 NAT/IT/000190 ARION, a permanent autonomous real-time passive acoustic monitoring system has been implemented in the Portofino Marine Protected Area (IT) for the improvement of the conservation status of bottlenose dolphin (Tursiops truncatus). The system is able to detect and track in...

Within the framework of the EU Life+ project named LIFE09 NAT/IT/000190 ARION, a permanent autonomous real-time passive acoustic monitoring system has been implemented in the Portofino Marine Protected Area (IT) for the improvement of the conservation status of bottlenose dolphin (Tursiops truncatus). The system is able to detect and track in...

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The WhaleSafe project aims at preserving both sperm whales and boats from unwished collision in Santuario Pelagos, close to Savona (Italy). The system is made of 2 mother buoys, each one connected with its daughter through a data cable. The mother buoys provide power from the Sun and wind to their daughters who have 4 hydrophones and an...

In WhaleSafe project the data collected from 2 couples of buoys with 4 hydrophones will be analysed to estimate TDOA in the signal emitted from sperm whales detected by the system. Results transmitted to a ground station will be used to extrapolate the point where the whales should emerge. A high sensitivity and specificity detector is...

The WhaleSafe project aim is to detect and track sperm whale to prevent collisions with boats and ships by issuing warning messages in real time to the involved actors. Two buoys with four hydrophones onboard will be installed in Savona area and the collected data will be used to extrapolate the point where the whale should emerge. It is...

The ARION main objective is the creation of a virtual corridor for monitoring and surveillance of transient and resident bottlenose dolphins ({Tursiops truncatus). We deployed in the Portofino MPA two detection units, based on a particular type of marine buoy (elastic beacon) each equipped with four hydrophones and an acquisition system which...

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Bottlenose dolphin (Tursiops truncatus) is one of the Mediterranean cetaceans listed in the Annex II of Habitat Directive. The main objective is the creation of a virtual corridor for monitoring and surveillance of the transient and resident bottlenose dolphins. Concrete conservation actions take place in the Portofino MPA (Italy). We show the...