Neighbors affect vocal behavior of tropical wrens: a multispeaker density-manipulation experiment.

For territorial animals, the behavior of conspecific neighbors sets the social context of communication. Despite numerous investigations of vocalizations related to territory defense and mate attraction, the effect of neighbor density on animal vocal behavior has received little attention, particularly in tropical animals and animals where both sexes produce complex acoustic signals. In this study, we used an innovative multispeaker playback experiment to manipulate the apparent density of neighbors in rufous-and-white wrens, Thryophilus rufalbus, living in Costa Rica's tropical dry forest. In this tropical songbird, both males and females defend year-round territories and sing complex, learned songs for territory defense. We recorded the singing behavior of 24 subjects (12 pairs), and then we used an array of 6 loudspeakers to simulate the presence of 6 new territorial neighbors (3 simulated pairs) outside each subject pair's breeding territory. The stimuli persisted for 3 consecutive days, with both male and female songs broadcast at a natural rate from dawn to dusk. We found that the mean male song rate increased by almost 50% in response to the simulated increase in local density. Females showed less frequent song-type switching rates following the simulated increase in local density, although it was a marginal increase. These findings reveal that male and female songbirds' vocal behavior varies with the local density of territorial neighbors. We conclude that birds are sensitive to acoustic signals of conspecific density arising from sounds beyond their territory boundaries, and that they use this public information to guide their vocal behavior.

Knowledge and interactions of the local community with the herpetofauna in the forest reserve of Quininí (Tibacuy-Cundinamarca, Colombia).

BACKGROUND: The study of human-nature relationship has made possible to understand the life dynamics of the communities and the biodiversity with which they cohabit. Although there has been a rise of ethnobiological studies over the last decade, little is known about human interaction with herpetofauna in South America and Colombia. In this work, we analyzed the knowledge, perception, and interaction of a local community located in the forest reserve of Quininí (RFPCQ) in Cundinamarca (Colombia), concerning to the herpetofauna that inhabits the area. METHODS: We performed semi-structured surveys containing 30 questions categorized into three groups: academic knowledge (1), use and cultural beliefs (2), and interactions (3) related to the herpetofauna that occurs in the region. The obtained data in question groups 1 and 2 are presented as a qualitative summary. For the question group 3, we assigned the answers to a hostility value according to the possible reaction of each individual interviewed in a hypothetical encounter with the herpetofauna and built tendency charts in order to see the positive or negative reactions due to the birthplace (urban/rural) and gender (male/female). RESULTS: The community recognized the presence of amphibians and reptiles that cohabit their space, as well as their potential habitats. Besides, the role of herpetofauna was recognized in the magical/religious traditions for some inhabitants of the region, mainly associated with the fate and cure of chronic diseases. In general, the perception of amphibians and reptiles varied according to the origin and gender of the people, which tend to have a more positive perception of reptiles than compared to amphibians in most cases. CONCLUSIONS: Although there was a general lack of knowledge on the part of the inhabitants of the RFPCQ about the biological and ecological aspects of herpetofauna, the population recognized the basic information about the habitats of these animals within the reserve area. There is a wide variety of uses of amphibians and reptiles in traditional medicine. Greater efforts should be made in the transmission and dissemination of knowledge about the ecological functions of herpetofauna.

Gestión de riesgo para la prescripción de terapias biológicas / Risk management for prescribing biological therapies

(AU) El concepto de «riesgo en salud¼ es relativamente nuevo, surge en el lenguaje epidemiológico británico en los inicios del siglo xx y es definido por la OMS como la probabilidad de un resultado sanitario adverso, o la presencia de un factor que aumenta esa probabilidad. La gestión del riesgo se define, a su vez, como el proceso de identificar, analizar y cuantificar las probabilidades de pérdidas y efectos secundarios que se desprenden de los actos en salud, así como de las acciones preventivas, correctivas y reductivas correspondientes que deben emprenderse. La gestión del riesgo es un proceso gerencial estructurado que tiene por objetivo identificar los principales riesgos en salud de la población o del individuo. Los riesgos identificados son intervenidos mediante estrategias coordinadas que buscan disminuir su ocurrencia

Estudio exploratorio sobre conocimientos y actitudes frente algunas intervenciones neurocientíficas en Colombia / Exploratory study about the knowledge and attitudes towards neuroscientific interventions in Colombia

El objetivo del estudio fue evaluar las actitudes y conocimientos de 40 participantes pertenecientes a diferentes esferas sociales frente a las intervenciones neurocientíficas en ensanchamiento o mejoramiento cognitivo. Esto, con el fin de explorar en qué medida encuentran moralmente aceptable los desarrollos biotecnológicos en las neurociencias del comportamiento. Se realizó un análisis cuantitativo y cualitativo. No se encontraron diferencias en la actitud hacia las intervenciones según el nivel de conocimiento. Por último, se observó una tendencia central en lo que respecta a las percepciones éticas sobre estas intervenciones, a pesar de encontrar diferencias de aceptabilidad moral en los diferentes grupos.

This study was aimed to assess attitudes and knowledge of 40 people from different social status toward the scientific interventions in cognitive neuroenhancement. It is in order to inquire about the moral acceptance of the biotechnologically viable in behavioral neuroscience. Both, quantitative and qualitative analyses were performed. No differences in attitude towards interventions according to the level of knowledge were presented. Finally a central tendency was observed toward the ethical perceptions about the mentioned interventions, in spite of having found moral differences in moral acceptability among the different groups.

Respuesta electrodérmica y expresiones faciales de niños que entablan un juego de ficción relacionado con comportamientos de agresión / Electrodermal Response and Facial Expressions of Children who Engage in Pretense Play Related with Aggressive Behaviors

En Colombia existe un alto porcentaje de niños y jóvenes que despliegan o son víctimas de conductas agresivas en el contexto escolar. Existe evidencia que muestra que estas conductas están asociadas con dificultades en la regulación emocional y en los procesos de teoría de la mente. Se llevaron a cabo seis estudios de caso a niños entre los 4 y 8 años de edad. A los participantes del estudio se les presentó un cuestionario en donde se planteaban situaciones conflictivas y buscaba fomentar el juego de ficción. Se evaluó la respuesta electrodérmica y las expresiones faciales durante la entrevista. Se presentó una mayor frecuencia de expresiones faciales y cambios en la respuesta electrodérmica cuando la agresión, en las situaciones conflictivas, era intencional y dirigida a un sujeto. Las emociones más frecuentes, registradas en la expresión facial, fueron rabia, tristeza y desprecio. Los resultados de este estudio, sugieren que las expresiones faciales y la respuesta electrodérmica pueden ser medidas interesantes para estudiar la regulación emocional y las conductas agresivas.

Colombia displays a high percentage of children and teenagers that deploy or are victims of aggressive behaviour in the school. There is evidence that shows that these behaviours are associated with difficulties during emotion regulation and in theory of mind. Six case studies were developed in children between 4 and 8 years of age. A questionnaire that involved conflict situations and that sought to promote pretense play was presented to participants. Facial expressions and electrodermic responses were evaluated during the interview. A higher frequency of facial expressions and changes in electrodermic response were recorded when the aggression, in the conflict situations, was intentional and directed towards a person. The most frequent facial expressions of emotion were anger, sadness, and contempt. The results of the present study suggest that facial expressions and electrodermic response could be interesting measures to study emotion regulation and aggressive behaviour.