Manual versus automatic identification of black-capped chickadee (Poecile atricapillus) vocalizations

One time-consuming aspect of bioacoustic research is identifying vocalizations from long audio recordings. SongScope (version 4.1.5. Wildlife Acoustics, Inc.) is a computer program capable of developing acoustic recognizers that can identify wildlife vocalizations. The goal of the current study was to compare the effectiveness of manual identification of black-capped chickadee vocalizations to identification by SongScope recognizers. A recognizer was developed for each main chickadee vocalization by providing previously annotated audio of chickadees. Six chickadees (three male, three female) were recorded in one-hour intervals with and without anthropogenic (i.e., man-made) noise to provide a variety of samples to test the recognizer. These recordings were analyzed via the recognizer and two human coders, with an additional third coder reviewing a random subset of recordings for reliability. Strong agreement was found between the human coders, κ = 0.76, p < 0.00. Agreement between human coders and the recognizer was moderate for fee songs, κ = 0.46, p < 0.00, and strong for fee-bee songs, κ = 0.77, p < 0.00, as well as for chick-a-dee calls, κ = 0.82, p < 0.00. Results showed that male chickadees produced more tseet calls in silence and females produced more gargle calls during noise. No differences were found in vocalizations based on time of day. Our observations also suggest that the chick-a-dee recognizer was capable of identifying gargle and tseet calls along with the intended chick-a-dee calls. Overall, SongScope was effective at identifying fee-bee songs and chick-a-dee calls, but not as effective for identifying fee songs. These recognizers can allow for faster acoustic analyses (by approximately four times) and be continuously improved for greater accuracy

Flexibility in Animal Signals Facilitates Adaptation to Rapidly Changing Environments

Charles Darwin posited that secondary sexual characteristics result from competition to attract mates. In male songbirds, specialized vocalizations represent secondary sexual characteristics of particular importance because females prefer songs at specific frequencies, amplitudes, and duration. For birds living in human-dominated landscapes, historic selection for song characteristics that convey fitness may compete with novel selective pressures from anthropogenic noise. Here we show that black-capped chickadees (Poecile atricapillus) use shorter, higher-frequency songs when traffic noise is high, and longer, lower-frequency songs when noise abates. We suggest that chickadees balance opposing selective pressures by use low-frequency songs to preserve vocal characteristics of dominance that repel competitors and attract females, and high frequency songs to increase song transmission when their environment is noisy. The remarkable vocal flexibility exhibited by chickadees may be one reason that they thrive in urban environments, and such flexibility may also support subsequent genetic adaptation to an increasingly urbanized world

Experience affects immediate early gene expression in response to conspecific call notes in black-capped chickadees (Poecile atricapillus)

This research was supported by a Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grant and Discovery Accelerator Supplement, an Alberta Ingenuity Fund (AIF) New Faculty Grant, a Canada Foundation for Innovation (CFI) New Opportunities Fund (NOF), and Infrastructure Operating Fund (IOF) grants along with start-up funding and CFI partner funding from the University of Alberta (UofA) to C.B.S. L.M.G. was supported by an Izaak Walton Killam Memorial Scholarship (IWKMS) at UofA and is currently supported by a Newton International Fellowship jointly run by the Royal Society and the British Academy.Black-capped chickadees (Poecile atricapillus) produce numerous vocalizations, including the acoustically complex chick-a-dee call that is composed of A, B, C, and D notes. D notes are longer in duration and lower in frequency than the other note types and contain information regarding flock and species identification. Adult wild-caught black-capped chickadees have been shown to have similar amounts of immediate early gene (IEG) expression following playback of vocalizations with harmonic-like acoustic structure, similar to D notes. Here we examined how different environmental experiences affect IEG response to conspecific D notes. We hand-reared black-capped chickadees under three conditions: (1) with adult conspecifics, (2) with adult heterospecific mountain chickadees, and (3) without adults. We presented all hand-reared birds and a control group of field-reared black-capped chickadees, with conspecific D notes and quantified IEG expression in the caudomedial mesopallium (CMM) and caudomedial nidopallium (NCM). We found that field-reared birds that heard normal D notes had a similar neural response as a group of field-reared birds that heard playback of reversed D notes. Field-reared birds that heard normal D notes also had a similar neural response as birds reared with adult conspecifics. Birds reared without adults had a significantly reduced IEG response, whereas the IEG expression in birds reared with heterospecifics was at intermediate levels between birds reared with conspecifics and birds reared without adults. Although acoustic characteristics have been shown to drive IEG expression, our results demonstrate that experience with adults or normal adult vocalizations is also an important factor.PostprintPeer reviewe

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sensitive to changes in a vocal discrimination task Sometimes slower is better: slow-exploring birds are more Centre for Neuroscience, University of Alberta, Edmonton, Alberta, Canada T6G 2E9 Animal personality, defined as consistent individual differences across context and time, has attracted much recent research interest in the study of animal behaviour. More recently, this field has begun to examine how such variation arose and is maintained within populations. The habitat-dependent selection hypothesis, which posits that animals with differing personality types may fare better (i.e. have a fitness advantage) in different habitats, suggests one possible mechanism. In the current experiment, we tested whether slow-and fast-exploring black-capped chickadees (Poecile atricapillus), determined by performance in a novel environment exploration task, perform differentially when the demands of an acoustic operant discrimination (cognitive) task were altered following successful task acquisition. We found that slow-exploring birds learn to reverse previously learned natural category rules more quickly than faster exploring conspecifics. In accordance with the habitat-dependent selection hypothesis, and previous work with great tits (Parus major), a close relative of the black-capped chickadee, our results suggest that fast-exploring birds may perform better in stable, predictable environments where forming a routine is advantageous, while slow-exploring birds are favoured in unstable, unpredictable environments, where task demands often change. Our results also support a hypothesis derived from previous work with great tits; slow-exploring birds may be generally more flexible (i.e. able to modify their behaviour in accordance with changes in environmental stimuli) in some learning tasks

The role of spirituality in treatment of patients and work of health care workers

Duhovnost kao specifična dimenzija čovjekove osobnosti u medicini je prepoznata tek u posljednjih dvadesetak godina kao važan čimbenik u procesu izlječenja i odnosa zdravstveni djelatnik – bolesnik. U tu su svrhu provedena brojna istraživanja među pacijentima glede njihova religioznog svjetonazora i vjerničke duhovnosti kako bi se proniknulo što dublje i stekle što sveobuhvatnije spoznaje o utjecaju vjere i duhovnosti na ljudsko zdravlje. Kolika je važnost duhovnosti u suvremenoj medicini, posebice psihologiji, svjedoči i činjenica što su mnoge svjetske akademske institucije uvrstile duhovnost u programe redovite izobrazbe zdravstvenih djelatnika. Djelovanje zdravstvenog osoblja temelji se na kvalitetnom međuljudskom odnosu prema bolesnicima o kojima skrbe. Ovaj je odnos obilježen “povjerenjem” čovjeka koji je pogođen bolešću, ali se uzda u “savjest” i stručnost liječnika koji ga liječi i medicinske sestre koja ga njeguje. Ovaj se interpersonalni odnos temelji na pretpostavci da bolesnik nije samo “klinički slučaj”. Odnos, dakle, mora biti mnogo dublji, cjelovitiji, jer nije bolesno samo njegovo tijelo, nego je bolest zahvatila cijelu osobu, sa svim njezinim duševnim i duhovnim komponentama. Upravo zato zdravstveno osoblje treba biti osposobljeno prepoznati i procijeniti duhovne potrebe pacijenta. Dužnost je zdravstvenog djelatnika stvoriti ozračje međusobnog poštovanja kako bi stekao povjerenje bolesnika koji će potom očitovati svoje tegobe i osjećaje pa i duhovne potrebe. Zdravstveni djelatnik treba biti čuvar i služitelj ljudskoga života, što pretpostavlja integralni pristup fenomenu zdravlja i bolesti. Bez obzira na osobno vjersko uvjerenje ili svjetonazor zdravstveni je djelatnik pozvan u svom profesionalnom odnosu prema bolesniku poštivati i zagovarati temeljne moralne vrijednosti: dostojanstvo ljudske osobe i nepovrjedivost ljudskoga života na svim razinama: tjelesnoj, emocionalnoj, društvenoj i duhovnoj. Za liječenje bolesti, dakle, prijeko je potrebno uzeti u obzir ne samo tjelesne, psihološke i društvene, nego i duhovne čimbenike.Spirituality as a specific dimension of human personality has been recognized in medicine not earlier than the last twenty years as an important factor in the healing process and the relationship between the health care worker and patient. For this purpose numerous researches have been carried out among the patients with regard to their religious worldview and spirituality in order to gain a deep and comprehensive understanding of the influence of religion and spirituality on human health. The importance of spirituality in contemporary medicine, especially in psychology, can be seen in the fact that numerous academic institutions in the world have included spirituality in the educational programmes for health care professionals. The activities of health care workers are founded on a good quality relationship to the patients they care for. This relationship is marked by the confidence of the person affected by a disease who believes in the doctor’s conscience and expertise and the nurse’s care. This interpersonal relationship is based on the assumption that the patient is not just a clinical case. Therefore, the relationship should be much deeper and more comprehensive, because not only his body is ill but illness has affected the whole person with his/her mental and spiritual components. That is why health care workers should be qualified to recognize and assess the spiritual needs of the patient. It is the duty of health care workers to create an atmosphere of mutual respect in order to gain the trust of patients who will then manifest their problems and feelings as well as their spiritual needs. The health worker should be a guardian and minister of human life which implies an integral approach to the phenomenon of health and disease. Regardless of personal religious belief or worldview, a health care worker is called in his professional relationship to the patient to respect and advocate the fundamental moral values: human dignity and inviolability of human life at all levels: physical, emotional, social and spiritual. Therefore, in the treatment of diseases it is necessary to take into account not only physical, psychological and social factors, but spiritual factors as well

ZENK expression in the auditory pathway of black-capped chickadees (Poecile atricapillus) as a function of D note number and duty cycle of chick-a-dee calls

Black-capped chickadees (Poecile atricapillus) use their namesake chick-a-dee call for multiple functions, altering the features of the call depending on context. For example, duty cycle (the proportion of time filled by vocalizations) and fine structure traits (e.g., number of D notes) can encode contextual factors, such as predator size and food quality. Wilson and Mennill (2011) found that chickadees show stronger behavioral responses to playback of chick-a-dee calls with higher duty cycles, but not to the number of D notes. That is, independent of the number of D notes in a call, but dependent on the overall proportion of time filled with vocalization, birds responded more to higher duty cycle playback compared to lower duty cycle playback. Here we presented chickadees with chick-a-dee calls that contained either two D (referred to hereafter as 2 D) notes with a low duty cycle, 2 D notes with a high duty cycle, 10 D notes with a high duty cycle, or 2 D notes with a high duty cycle but played in reverse (a non-signaling control). We then measured ZENK expression in the auditory nuclei where perceptual discrimination is thought to occur. Based on the behavioral results of Wilson and Mennill, 2011, we predicted we would observe the highest ZENK expression in response to forward-playing calls with high duty cycles; we predicted we would observe no significant difference in ZENK expression between forward-playing high duty cycle playbacks (2 D or 10 D). We found no significant difference between forward-playing 2 D and 10 D high duty cycle playbacks. However, contrary to our predictions, we did not find any effects of altering the duty cycle or note number presented

Neural Correlates of Threat Perception: Neural Equivalence of Conspecific and Heterospecific Mobbing Calls Is Learned

Songbird auditory areas (i.e., CMM and NCM) are preferentially activated to playback of conspecific vocalizations relative to heterospecific and arbitrary noise [1]–[2]. Here, we asked if the neural response to auditory stimulation is not simply preferential for conspecific vocalizations but also for the information conveyed by the vocalization. Black-capped chickadees use their chick-a-dee mobbing call to recruit conspecifics and other avian species to mob perched predators [3]. Mobbing calls produced in response to smaller, higher-threat predators contain more “D” notes compared to those produced in response to larger, lower-threat predators and thus convey the degree of threat of predators [4]. We specifically asked whether the neural response varies with the degree of threat conveyed by the mobbing calls of chickadees and whether the neural response is the same for actual predator calls that correspond to the degree of threat of the chickadee mobbing calls. Our results demonstrate that, as degree of threat increases in conspecific chickadee mobbing calls, there is a corresponding increase in immediate early gene (IEG) expression in telencephalic auditory areas. We also demonstrate that as the degree of threat increases for the heterospecific predator, there is a corresponding increase in IEG expression in the auditory areas. Furthermore, there was no significant difference in the amount IEG expression between conspecific mobbing calls or heterospecific predator calls that were the same degree of threat. In a second experiment, using hand-reared chickadees without predator experience, we found more IEG expression in response to mobbing calls than corresponding predator calls, indicating that degree of threat is learned. Our results demonstrate that degree of threat corresponds to neural activity in the auditory areas and that threat can be conveyed by different species signals and that these signals must be learned

Compressed representation of a partially defined integer function over multiple arguments

In OLAP (OnLine Analitical Processing) data are analysed in an n-dimensional cube. The cube may be represented as a partially defined function over n arguments. Considering that often the function is not defined everywhere, we ask: is there a known way of representing the function or the points in which it is defined, in a more compact manner than the trivial one

Evidence for the 125 GeV Higgs boson decaying to a pair of tau leptons

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