1,721,046 research outputs found
Spawning and fanning activities in the Italian fresh water goby, Padogobius martensi
No full textNewsletter of the International Association of Fish Ethologist
L’ascolto nella didattica universitaria
No full textNon si pensa quasi mai alla didattica universitaria in termini di ascolto, intendendo quello che un/a docente rivolge agli studenti con l'obiettivo di ottenere feedback sulla relazione con loro e sulla propria attività didattica, da un lato, e di capire le loro esigenze e i loro bisogni, dall'altro, in modo da calibrare e migliorare i contenuti della didattica.
Il capitolo approfondisce i mezzi e modi dell'ascolto del/la docente in contesti universitari ristretti, medi e ampi, e propone una metodologia concepita nell'ambito di una più generale teoria della comunicazione come cooperazione provieniente dalla semiotica interpretativa e dalla pragmatica di Paul Grice
Analysis of sound produced by male Padogobius martensi (Pisces, Gobidae) and factors affecting their structural properties.
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Fermionic State Discrimination by Local Operations and Classical Communication
No full textWe consider the problem of local operations and classical communication (LOCC) discrimination between two bipartite pure states of fermionic systems. We show that, contrary to the case of quantum systems, for fermionic systems it is generally not possible to achieve the ideal state discrimination performances through LOCC measurements. On the other hand, we show that an ancillary system made of two fermionic modes in a maximally entangled state is a sufficient additional resource to attain the ideal performances via LOCC measurements. The stability of the ideal results is studied when the probability of preparation of the two states is perturbed, and a tight bound on the discrimination error is derived
The response of the male freshwater goby to natural and synthetic male courtship sound playback following exposure to different female sexual sitimuli.
Full text linkAmong teleosts, field and laboratory experiments have shown the playback of male courtship sounds often elicits competitive courtship and sound emission in the territorial male. However, the importance of female stimulation for the male response to the sound is poorly understood. In this study, playback experiments with the freshwater goby, Padogobius martensii, examined the response of resident males (i.e. males individually housed within laboratory tanks for at least
5 days) to natural and synthetic male courtship sounds after exposure to chemical or visual stimuli from a ripe female. All playback tests consisted of one experimental (sound playback) and two control treatments, all of equal duration.
Three experiments were conducted on a first group of 12 males using natural courtship sounds. Experiment 1 consisted of playing back the sound to a male that had not exposed to female stimulation for at least 24 hr. The same male was exposed to the “female pheromone” by dropping a few cm3 of female holding water into the male’s tank, just prior to playback (Experiment 2), or to the view of a live ripe female in a close-by tank, during playback (Experiment 3). The
sound playback failed to elicit positive responses by males not exposed to female stimuli (Experiment 1), and did not increase courtship activity of the male in visual contact with the female (Experiment 3). However, it increased swimming activity and facilitated courtship and sound production in the male after an increase in sexual arousal by prior chemical stimulation (Experiment 2). In Experiment 4, the synthetic version of the courtship sound and one deprived of pulse-rate modulation and harmonic content (pure tone) were played back to 10 resident males following prior chemical stimulation. The synthetic courtship sound, but not the pure tone, was effective in eliciting positive responses by the sexually aroused male. Functional implications of the responses to the courtship sound for the territorial male are discussed. The results are relevant to the understanding of the role of sound communication and interception among gobies and to develop playback experiments in the field
The response of the male freshwater goby to natural and sybtetic male courtship sounds playback following exposure to different females sexual stimuli.
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