Mammal Collection of the Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENFMZ):

The Mammal Collection of UENF was created in 2013 to document the biodiversity of northern Rio de Janeiro, and house voucher specimens collected during field research held by professors from the university and collaborating institutions. The collection currently holds 440 physical vouchers, mostly bats, and includes noteworthy records, such as the first Promops nasutus reported for the state of Rio de Janeiro. To these physical vouchers, we recently added a digital bioacoustics collection (343 files of bat distress calls) and a camera-trap multimedia collection (2683 videos or photographs of small to large-sized mammals). In this paper, we provide an overview of these holdings, and highlight and discuss the importance of regional scientific collections, along with the fundamental role of publishing their records in online databases in order to increase their visibility and scientific use. Finally, we discuss the importance of natural history collections to society, emphasizing that improving the awareness of the general public on the role of these collections to scientific development will be crucial for their conservation over the next centuries.

Parent-offspring and inter-offspring responses to conspecific vs heterospecific distress calls in two sympatric birds

Distress calls, as a type of alarm call, play important roles in expressing bodily condition and conveying information concerning predation threats. In this study, we examined the communication via distress calls in parent–offspring and inter-offspring interactions. First, we used playback of chick distress calls of two sympatric breeders, the vinous-throated parrotbill Sinosuthora webbiana and the oriental reed warbler Acrocephalus orientalis, to the adults/chicks of these two species respectively and measured the responses of conspecifics or heterospecifics. The playback-to-chicks experiment showed that both species of chicks reduced the number of begging calls and begging duration time as a response to conspecific/heterospecific distress calls compared with natural begging and background noise controls. However, reed warbler chicks also reduced beak opening frequency in the response to conspecific distress calls compared with other playback stimuli. Second, the results of the playback-to-adults experiment showed that reed warbler adults could eavesdrop on distress calls of conspecific neighbors and sympatric heterospecifics. Furthermore, the nest-leaving behavior of reed warblers did not differ significantly when they heard the distress calls of conspecifics or parrotbills. Finally, reed warbler adults responded to conspecific distress calls more quickly than to heterospecific distress calls, while parrotbill adults presented the opposite response. Our results supported the warn-kin hypothesis and show that chick distress calls play an important role in conveying risk and the condition of chicks to enhance individual fitness. In addition, we also found that eavesdropping on distress calls is a congenital behavior that begins in the chick stage.

Automated identification of chicken distress vocalisations using deep learning models

The annual global production of chickens exceeds 25 billion birds, and they are often housed in very large groups, numbering thousands. Distress calling triggered by various sources of stress has been suggested as an "iceberg indicator" of chicken welfare. However, to date, the identification of distress calls largely relies on manual annotations, which is very labour-intensive and time-consuming. Thus, a novel light-VGG11 was developed to automatically identify chicken distress calls using recordings (3,363 distress calls and 1,973 natural barn sounds) collected on intensive chicken farms. The light-VGG11 was modified from VGG11 with a significantly smaller size in parameters (9.3 million vs 128 million) and 55.88% faster detection speed while displaying comparable performance, i.e., precision (94.58%), recall (94.89%), F1-score (94.73%), and accuracy (95.07%), therefore more useful for model deployment in practice. To further improve the light-VGG11's performance, we investigated the impacts of different data augmentation techniques (i.e., time masking, frequency masking, mixed spectrograms of the same class, and Gaussian noise) and found that they could improve distress calls detection by up to 1.52%. In terms of precision livestock farming, our research opens new opportunities for developing technologies used to monitor the output of distress calls in large, commercial chicken flocks.

COVID-19 and young people with intellectual disability: a service review

AimsA service review of specialist child and adolescent intellectual disability provision in South Wales was conducted between March and May 2020. The purpose was to explore the impact of the first COVID-19 pandemic lockdown on children with intellectual disability and their families. The review aimed to explore if the disruption to the systems involved in their care would impact their wellbeing and behavioural presentations. We also measured if there had been an increase in the use of medication. Our focus was on the distress calls, which are requests for urgent clinical review to prevent a crisis.A service review of specialist child and adolescent intellectual disability provision in South Wales was conducted between March and May 2020. The purpose was to explore the impact of the first COVID-19 pandemic lockdown on children with intellectual disability and their families. The review aimed to explore if the disruption to the systems involved in their care would impact their wellbeing and behavioural presentations. We also measured if there had been an increase in the use of medication. Our focus was on the distress calls, which are requests for urgent clinical review to prevent a crisis.MethodSix clinical areas across three Welsh health boards under the same specialist team were surveyed. Case notes and email correspondence were reviewed to obtain the number and content of crisis calls made to specialist CAMHS across an eight week period during the first UK COVID-19 lockdown. Data were gathered on frequency, purpose, and outcome of calls. Comparison data were also collected for the period October 2019 to March 2020.ResultPre-COVID-19: Two crisis calls were identified in two different areas during the pre-COVID period surveyed. Increases in medication and increases in respite care packages were made as a result.During COVID-19 restrictions: 20 different initial distress calls made (children age 9 and 17 years old (M = 13.2); 75% were boys) across five of the six clinical areas. Of these 20 calls, 17 were active cases and 3 were new referrals. 95% of calls resulted in medication increases and there were few other interventions used due to COVID-19 constraints. Changes to the child's support system were discussed across all cases and return to school was highlighted as a key protective factor in improved well-being. Differences between clinical areas were also identified.ConclusionThere was a clear increase in distress calls and requests to prescribe or increase psychotropic medication to calm the distress during the ‘lockdown’. Changes in behavioural presentation may have occurred partly due to the disruption to the complex systems that typically support a child and the shift away from community support. Children with intellectual disability and their families are unique and embedded in complex systems comprising schools, respite, and healthcare provision which work together to deliver optimal mental healthcare with psychosocial interventions with medication for higher-risk situations. Any shifts in these systems may lead to an imbalance and a higher likelihood of medication use.

Male Carollia perspicillata bats call more than females in a distressful context

Distress calls are a vocalization type widespread across the animal kingdom, emitted when the animals are under duress, e.g. when captured by a predator. Here, we report on an observation we came across serendipitously while recording distress calls from the bat species Carollia perspicillata , i.e. the existence of sex difference in the distress calling behaviour of this species. We show that in C. perspicillata bats, males are more likely to produce distress vocalizations than females when hand-held. Male bats call more, their calls are louder, harsher (faster amplitude modulated) and cover lower carrier frequencies than female vocalizations. We discuss our results within a framework of potential hormonal, neurobiological and behavioural differences that could explain our findings, and open multiple paths to continue the study of sex-related differences in vocal behaviour in bats.

Comparative behaviour of local and exotic chickens in tests of fearfulness, anxiety and cognition

Behaviour affects performance and productivity of poultry birds especially chickens, some behavioural traits are advantageous in a particular production system and may be of disadvantage in another production system. The present study compared behavioural of Nigeria Local Chicken, NLC (two separate samples of 11 Yoruba Ecotype) and its Exotic counterparts (11 Broilers and 11 Pullets) by use of the Open Field (OFT), T-Maze, Forced Approach, and Voluntary Approach Tests (FAT and VAT respectively) during two phases of Growth (0-4 Weeks, and 4-8 weeks age respectively). The former group (NLC) is better adapted to extensive management in the Nigerian Guinea savannah than the latter Results showed that Yoruba NLC issued a significantly (p<0.05) higher number of distress calls than the Exotic genotypes in the OFT at age 7 and 48 days, and the NLC issued significantly more calls at 7 days age. Broilers exhibited significantly lower OFT Latency at 7 and 48 days, and Broilers traversed fewer squares and spent less time ambulating than other genotypes at 48 days age. Ina T-maze, Broilers showed significantly (p<0.05) lower exploratory behaviour than other groups (higher latency to leave the start box). In the FAT, NLC showed lower Latency to flight (p<0.05) than the Exotic genotypes. Ethological test results indicate differences in the behavioural characters exhibited by Yoruba NLC and Exotic Chickens and such differences could embody the basis of anecdotal differences in the rates of survival under extensive management conditions, and may be subjected to quantitative genetic selection in the ongoing effort to produce improved chickens that incorporate a combination of desirable traits from both Local and Exotic chickens.