Vyron Georgalas

ILKNAK aquaculture

Descriptions of the acoustical properties of bouts and sound units. (DOCX)

Size, number of acoustic bouts and sound units of the recorded resident individuals. (DOCX)

Pearson correlation coefficients (* = p<0.05) of the relationships amongst the individual means of each acoustic property (n = 10 specimens). (DOCX)

Mean acoustic properties of bouts per individual. (DOCX)

Individual means. (DOCX)

An ecological approach to wildlife strike risk assessment was implemented and the resulting algorithm (BRI2) was used to assess the wildlife risk at Italian airports (http://bit.ly/HbiNNK). The BRI2 takes into account the ecological characteristics of the wildlife communities present in each airport area, the local history of wildlife strikes, thei...

The presence of wildlife in airport areas poses substantial hazards to aviation. Wildlife aircraft collisions (hereafter wildlife strikes) cause losses in terms of human lives and direct monetary losses for the aviation industry. In recent years, wildlife strikes have increased in parallel with air traffic increase and species habituation to anthro...

Boxplots of the within-bout (a: CVsb) and within-individual (b: CVw) coefficients of variation. CVsb are the coefficients of variation of acoustic properties of the sound elements measured in each of the 78 bouts (mean values = ). CVw are the coefficients of variation of the mean acoustic properties of the bouts of each of the 10 individuals (mean...

Layout of the housing terraria (community tank). FP: polyurethane foam panel; h/T: hygrometer's and thermostat's probes; IR: thermostated heating lamps; Md: mud; P: pool (non toxic plastic bowl); T: thermometer; z: three parallel zones separated by wooden logs and flat slate pieces to reduce aggressive interactions. (TIF)

A complex bout emitted by a male of P. septemradiatus. Left panel: video recording; the fish, which is a resident territorial owner, is oriented towards the cage containing the intruder (on the right, not visible). The oscillogram (top right panel) and spectrogram (bottom right panel) of the emitted bout show a train of pulses followed by a tonal s...

Temporal organisation of a mudskipper call and some acoustic properties. p pulse; p+t fused pulse and tonal segment; t tonal segment; PD pulse duration; PPI pulse-pulse interval; TD tonal duration; TPI tonal-pulse interval; TTI tonal-tonal interval. (TIF)

Spectrograms, power spectrum and waveforms of tonal artificial sounds acoustically similar to the tonal segments of the calls of P. septemradiatus, synchronously recorded in terms of pressure (a, b and c) and particle velocity (d, e and f); sounds were produced as a descending scale from 500 Hz at third octave steps (hamming FFT: 512, frame: 100, b...

The species studied and housing conditions. Tonal and pulsed artificial sounds through the substrate, recorded as particle displacements and pressure waves. Supplementary references. (DOCX)

Spectrograms, power spectrum and waveforms of pulsed artificial sounds acoustically similar to the pulsatile elements of the calls of P. septemradiatus, synchronously recorded in terms of pressure (a) and particle velocity (b); see Figs. S4 for more details. (TIF)

Coupled behavioural observations and acoustical recordings of aggressive dyadic contests showed that the mudskipper Periophthalmodon septemradiatus communicates acoustically while out of water. An analysis of intraspecific variability showed that specific acoustic components may act as tags for individual recognition, further supporting the sounds'...

Since man has taken into the skies there has been a conflict with birds, resulting in large economic and life loss. During the first flights, as the number of aircraft flying was low, there were fewer birdstrike events. However, with the increase in the number of flights the probability of a birdstrike event to occur also increased, while in parall...

Airports are peculiar developed habitats that, besides being extremely noisy and unappealing to some bird species, are highly attractive to others. Bird–aircraft collisions, or birdstrikes, cause losses in terms of human lives, direct monetary losses and associated costs for the civil aviation industry. In recent years, birdstrike risk assessment s...

Some relationships between the relative size of secondary sexual traits and male mating success were investigated in the killifish Aphanius fasciatus (Nardo, 1827). The relative ability of a male to compete with another male for access to a ripe female was related to the relative size of male sexual traits by means of a behavioural experiment under...

In this study, the reproductive behavior of Economidichthys pygmaeus was investigated under laboratory conditions with simultaneous video and acoustic recordings. Males of the freshwater goby E. pygmaeus do not produce sounds either during the courtship/spawning phase or during aggressive interactions. A detailed analysis of the behavioral sequence...

The present contribution aims to resume the main results obtained within a three years research project, analysing and discussing their potential use for the development of behavioural indicators of "wildness" of the cultured fish. The species we used as a study model was the European sea bass (Dicentrarchus labrax L.), which is cultured and seeded...

Abstract In this study, shoals of hatchery-reared and wild sea bass juveniles (Dicentrarchus labrax L.) were tested for differences in their antipredator responses towards a visual (shadow) and a mechanical (dummy bill) overhead stimulus. Two behavioural variables – distance from the bottom and freezing duration – were measured during post-stimulus...

The behaviour of European sea bass larvae reared with the mesocosm technique was analysed in relation to ontogeny and increasing food density, with a particular focus on swimming and feeding activities. The behaviour of groups of larvae (20 animals each) belonging to three age classes (10, 20 and 30 days post-hatching) was video-recorded in experim...

Shoals of hatchery‐reared and wild sea bass juveniles Dicentrarchus labrax were tested for differences in their antipredator responses towards a potential live predator, the eel Anguilla anguilla. Eight experimental shoals (i.e. replicates), each composed of 15 individuals from the same stock of juveniles (i.e. wild or hatchery), were video recorde...