Felicita Scapini

Learn More
1. The compensatory eyestalk movements ofPalinurus vulgaris have been measured in response to oscillations of the body, substrate and patterned visual surround about a body-parallel horizontal axis. The stimuli were delivered alone, and in fourteen different combinations (Fig. 2). 2. Responses are greatest (amplitude gain ca. 1.5) when the mechanical(More)
The capacity ofTalitrus saltator populations to adapt to variations in shoreline directions within a limited space was evaluated by testing both adults collected at different points along continuous sandy arcs, and the 1st and 2nd generations of their laboratory-born offspring (exposed to the sun for the first time during testing). Solar orientation of the(More)
Complexity is increasingly the hallmark in environmental management practices of sandy shorelines. This arises primarily from meeting growing public demands (e.g., real estate, recreation) whilst reconciling economic demands with expectations of coastal users who have modern conservation ethics. Ideally, shoreline management is underpinned by empirical(More)
The expression of biological rhythms was investigated in five populations of three different species of talitrid amphipods from various habitats in the Maremma Regional Park, Grosseto, Italy: Talitrus saltator (from a sandy beach and a canal), Orchestia montagui (form a Posidonia banquette), and O. gammarellus (from a cave entrance and a river bank).(More)
Tourism has long been considered as a 'clean industry' with almost no negative effects on the environment. This study demonstrated, in two different coastal systems (Mediterranean and Baltic), that tourism related activities are particularly affecting the sandy beach meio- and nematofauna in the upper beach zone, the specific ecotone in which many meiofauna(More)
C R E D IT : A L B E R T O P O M A R E S /I S T O C K P H O T O .C O M Methane from the East Siberian Arctic Shelf IN THEIR REPORT “EXTENSIVE METHANE VENTing to the atmosphere from sediments of the East Siberian Arctic Shelf ” (5 March, p. 1246), N. Shakhova et al. write that methane (CH 4 ) release resulting from thawing Arctic permafrost “is a likely(More)
The effect of oscillatory movement of single legs (about C-B axis) on compensatory eyestalk reactions and on leg counterforce as normally produced by substrate tilt has been investigated with the legs at different states of flexion (M-C joint) and leg-to-body orientation (T-C joint). Eye response and force reaction released by standard C-B movement increase(More)
Two mass-crossings between individualsTalitrus saltator from populations differing in theorical escape direction (TED) were made (Fig. 1). In sun orientation tests, the F1 offspring of two Tyrrhenian populations differing 125 ° in TED, placed in the sun for the first time, headed in an intermediate direction between the TEDs of the parents (Fig. 3). In(More)
1. Substrate tilting consistently elicits both an eyestalk response and a resistance reaction by the legs in the spiny lobsterPalinurus vulgaris. 2. These two responses differ from each other in terms of their phaso-tonic form, frequency response and strength of bilateral linkage. 3. Changing the relationship between imposed leg movement and the force of(More)
Two sympatric species from an exposed sandy beach in north-western Tunisia, the sandhoppers Talitrus saltator (Montagu) and Talorchestia brito Stebbing, were compared as regards orientation under natural conditions. Sets of experiments were carried out on the beach using two experimental arenas, one permitting the view of both the sky and landscape and the(More)