Revista de Etologia

**Quantificação e descrição dos principais comportamentos de papagaios-chauá (Amazona rhodocorytha, Salvadori, 1890) cativos**

No presente estudo, investigou-se a influência da disposição de diferentes itens de ambientação no recinto sobre o padrão comportamental de um grupo de 21 papagaios-chauá (Amazona rhodocorytha), constituído por indivíduos de ambos os sexos e diferentes procedências e idades, alojados em um recinto no Centro de Reintrodução de Animais Silvestres (Cereias, ES). As observações ocorreram durante o inverno, entre os meses de julho e setembro. Utilizou-se o método de varredura para quantificar as categorias locomoção, exploração, manutenção, repouso, vocalização em movimento, vocalização em repouso, interações sociais agonísticas e afiliativas. Registrou-se também, durante as varreduras, a utilização do espaço pelas aves. Os resultados indicam que: 1) em ambientes mais abertos (com mais luminosidade) os animais tendem a ficar mais ativos; 2) os indivíduos desta espécie apresentam um tropismo por regiões mais altas (Atividade: 24,4%; Repouso: 64,7%) e evitam repousar no chão (Atividade: 8,4%; Repouso: 2,5%). Os resultados são discutidos em função do conhecimento disponível sobre o comportamento de outras espécies de psitacídeos, sua manutenção em cativeiro, e a relevância deste estudo para os programas de conservação da espécie.

In the present study the behaviors of a "chauá" group (Amazon rhodocorytha), a threatened species of parrot, was described and quantified. The group was constituted by 21 individuals from different origins, with different ages and from both sexes, kept in captivity. The influence of the position of different objects in the enclosed space and of the period of the day on the pattern of activity of the group was also investigated. The observation took place between July and September. The scan method was used to quantify the categories locomotion, exploration, maintenance, rest, vocalization in movement, vocalization in rest, agonistic and affiliative social interactions. Space use was also registered during scans. The results indicate that: 1) the activity of the animals depends on characteristics of the environment-in more exposed environments the animals tend to be more active; 2) the individuals of this species present a tropism for higher areas and they avoid to rest in the ground. The results are discussed in the light of the knowledge available about the behavior of other species of parrots, their maintenance in captivity, and the relevance of this study for species conservation programs.

A glimpse at Ethology in Latin America

The state of the art of Ethology in five Latin America countries is briefly presented here. The overall outlook regarding research laboratories and themes is promising: the community is numerous, active and there are topics addressing all aspects of animal behavior, especially in large countries like Brazil and Argentina. Ethology as an undergraduate discipline is generally a sub-category of Biology, being taught mainly at Zoology/ Psychology/ Ecology/ Agriculture Courses and at Medical Veterinary Schools, often as an eligible discipline. Ethology as a formal major Graduate Program is rare and mainly restricted to Brazil. Regular Ethology meetings are held in Argentina, Brazil and Uruguay. In Chile and Venezuela there is a small but very active community. Studies of animal behavior are often carried out in other areas than Biology, and there is a clear overlap of interest regarding the major topics of Ethology. Behavioral ecology, conservation, management and animal welfare are a priority in most countries, probably reflecting a general concern regarding endangered species and habitats of the continent. Here we present information aiming to create a network that will increase collaborations among researchers working within the ethological framework in Latin America. The IV Simpósio de Etologia na América Latina, entitled "Desarrollo de la Etología en Latinoamérica:¿ hacia un futuro regional ?" was held in November, 2013, as part of the XXXI Encontro Anual de Etologia (EAE), in São Paulo, SP, Brazil. The state of art of Animal Behavior in Argentina, Brazil, Chile, Uruguay and Venezuela were presented there and a set of six questions guided the presentations: 1) What are the main Ethology topics being studied in laboratories in your country? - 2) Are there undergraduate or graduate programs in the main universities? - 3) Is there an Animal Behavior Society? How interested is the community in establishing close ties among institutes or laboratories elsewhere in Latin America? - 4) Is there a site, a journal, a page on a social networking site for contact, communication and divulgation of original data? - 5) How active is the community regarding the wiliness to organize congresses, symposia, meetings, workshops, on-line courses regarding Ethology? - 6) Are there funding agencies to support exchange programs and research in Ethology? Additional data were collected from the last two EAE regarding researchers from Latin America that attended EAE meetings and a list of names and laboratories was compiled (see appendix). It should be emphasized that the compilation of information presented here is far from complete. It represents a brief overview of the current status of Ethology in only five Latin American countries, and therefore it should be updated continuously with new data from the countries treated here as well as supplemented with data from other countries. Such a constantly updated list would facilitate the creation of networks that should increase collaborations among researchers working within the ethological framework in Latin America.

Presentamos brevemente el estado de la Etología en cinco países de América Latina. En general, con respecto a la investigación en laboratorios y temas de estudio la situación es prometedora: la comunidad es numerosa, activa, y los temas abarcan todos los aspectos del comportamiento animal, especialmente en países grandes como Brasil y Argentina. La Etología como disciplina de grado, por lo general es una subcategoría de la Biología, siendo impartida principalmente en cursos de Zoología /Psicología/ Ecología/Agricultura, y en las facultades de Medicina Veterinaria frecuentemente como disciplina opcional. No es frecuente que la Etología sea un programa formal de Posgrado, lo cual está principalmente restringido a Brasil. Se realizan encuentros regulares de Etología en Argentina, Brasil y Uruguay. En Chile y Venezuela se encuentran comunidades pequeñas pero muy activas, ligadas a la Etología. Los estudios de comportamiento animal se realizan frecuentemente en áreas distintas de la Biología, y hay una clara superposición de intereses respecto a los principales tópicos de la Etología. La ecología comportamental, la conservación, el manejo y el bienestar animal son prioridades en muchos países, lo que probablemente refleja una preocupación general respecto a las especies y hábitats amenazados en el continente. Aquí presentamos un informe preliminar orientado a crear una red que aumente la colaboración entre los investigadores que trabajan en el marco de la Etología en América Latina. El IV Simposio de Etología de América Latina, titulado "Desarrollo de la Etología en Latinoamérica:¿hacia un futuro regional?" se realizó en Noviembre de 2013, como parte del XXXI Encontro Anual de Etologia (EAE), en São Paulo, SP, Brasil. Invitados de cinco países -Argentina, Brasil, Chile, Uruguay y Venezuela- presentaron información sobre el estado del arte del comportamiento animal en sus naciones y las presentaciones fueron guiadas por un cuestionario de seis preguntas: 1) ¿Cuáles son los principales temas de estudio y laboratorios de Etología en su país? - 2) ¿Hay programas de grado o posgrado en las principales universidades? - 3) ¿Hay una sociedad de Comportamiento Animal? ¿Qué tan interesada está la comunidad en establecer vínculos estrechos entre institutos o laboratorios en otros lugares de América Latina? - 4) ¿Hay un sitio de internet, una revista o un en una red social para contacto, comunicación y divulgación de datos originales? - 5) ¿Qué tan activa es la comunidad respecto a la organización de congresos, simposios, encuentros, talleres y cursos on-line referidos a Etología? - 6) ¿Hay agencias de financiamiento para sostener programas de intercambio e investigación en Etología? Adicionalmente se recolectaron datos de los últimos dos EAE concerniente a los investigadores en América Latina que asistieron a los mismos y se compiló una lista de nombres y laboratorios.

**Effects of variations of osmolarity on behavior in Leptodactylus macrosternum Miranda-Ribeiro, 1926 (Leptodactylidae, Anura, Amphibia)**

Amphibians experiencing evapotranspirative water loss may suffer dehydration. Another difficulty is their limited tolerance to brackish water. This study aimed to investigate the effect of water salinity on behavior (activity and water conservation posture) in Leptodactylus macrosternum, in normally hydrated animals with urine in their bladder, in normally hydrated animals without urine in their bladder and in dehydrated ones with urine removed from their bladder. Experiments were filmed, behaviors were registered, and a Behavioral Dehydration Protection Index (BDPI) was calculated, using a weighted average of the postures. A GLM and Kruskall Wallis test was performed with Dunn's multiple comparisons test to evaluate the effects of osmotic gradient stress on BDPI. It was found that emptied bladder and aerial dehydration did not influence BDPI (p = 0.832 and p = 0.142, respectively), contrary to what is seen in the literature. The different osmotic media had a significant effect on BDPI (p = 0.0003).

Anfíbios que experimentam perda de água podem sofrer desidratação. Outra dificuldade é a tolerância limitada à água salobra. Este trabalho teve como objetivo estudar o efeito da salinidade da água no comportamento (atividade e postura de conservação de água) de L. macrosternum, normalmente hidratados com urina armazenada na bexiga, normalmente hidratados com urina removida da bexiga e nos desidratados com urina removida da bexiga. Os experimentos foram filmados e foi calculado o índice de proteção comportamental da desidratação (BDPI) usando média ponderada. Realizamos modelo linear generalizado e teste Kruskall-Wallis com comparação múltipla de Dunn, para analisar o efeito dos gradientes de estresse osmótico sobre o BDPI. Observamos que a bexiga esvaziada e a desidratação exercida pelo ar não influenciam o aumento do BDPI (p = 0.832 e p = 0.142, respectivamente) sendo contrário ao visto em literatura. Os diferentes meios osmóticos tiveram efeito sobre o BDPI (p = 0.0003).

**Behavioural and ecological aspects of black tufted-ear marmosets, Callithrix penicillata (Geoffroy, 1812) (Primates: Callitrichidae) in a semi-urban environment**

The black tufted-ear marmoset (Callithrix penicillata) is a small Neotropical primate, which lives in various types of environments from Cerrado (Brazilian savannah), Atlantic forest to urban areas. Research shows that food availability influences home range size, group size, population density and the behaviour of marmoset groups in the wild. The objective of this study was to investigate the behaviour of C. penicillata in an urbanized habitat, and the influence of (estimated) food availability on home range size, group size and population density. This study was performed through direct behavioural observation (84 hours) on four wild groups of marmosets living within the grounds of Belo Horizonte Zoological garden, Minas Gerais, Brazil. The results show that, despite living in an urban habitat, these marmosets presented home range size (2.85ha), group size (mean=5.7 ind.) and population density (2.19 ind/ha) values in the range found in wild-living conspecifics. The animals studied spent a considerable percentage of their time travelling (22.45%); resting (16.58%), inactive alert (14.95%) and feeding (6.74%). These results showed that behavioural activity repertoires were also found to be similar to wild-living conspecifics and therefore demonstrate the species adaptation capacity in urban environment.

O mico-estrela (Callithrix penicillata) é uma pequena espécie de primata neotropical que vive em vários tipos de ambientes como Cerrado e Mata Atlântica, podendo também ocupar áreas urbanas. Pesquisas já mostraram que a disponibilidade de recurso alimentar afeta a área de vida, o tamanho de grupo e o comportamento da espécie na natureza. Os objetivos deste estudo foram investigar o comportamento do mico-estrela em um ambiente urbanizado e a influência de recurso alimentar (estimado) na área de vida e na densidade populacional. O estudo foi realizado por meio de observações diretas (84 horas) com quatro grupos de mico-estrela vivendo nas dependências do zoológico de Belo Horizonte, Minas Gerais, Brasil. Os resultados mostraram que apesar de viverem em ambiente urbano, estes micos tem áreas de vida (2,85ha), tamanhos dos grupos (média=5,7 indivíduos) e densidades populacionais (2,19 ind/ha) parecidos com os valores obtidos para a espécie nativa. Os animais estudados, passaram a maior parte do dia se deslocando (22,45%), descansando (16,58%), inativos alertas (14,95%) e alimentando-se (6,74%). Estes resultados mostram que o padrão de atividade e o repertório comportamental exibidos pelos animais deste estudo são similares aos apresentados na natureza e portanto, evidenciam a capacidade de adaptação da espécie em ambientes antrópicos.

**¿Pueden los perros domésticos (Canis lupus familiaris) reconocer expresiones emocionales humanas? Una revisión crítica de las evidencias**

Las expresiones emocionales tienen un papel fundamental en las interacciones de especies sociales, brindando información acerca del emisor, las características e importancia del estímulo o situación que desencadena tales interacciones, y también funcionan regulando los vínculos sociales. Los perros poseen notorias capacidades comunicativas hacia los humanos por lo que resulta interesante estudiar si estas habilidades se extienden al reconocimiento de las expresiones emocionales. Se han realizado diversas investigaciones acerca del reconocimiento de expresiones emocionales humanas en perros exponiéndolos a una situación representada por personas durante la evaluación, así como mediante el uso de imágenes, videos y grabaciones. El análisis de las evidencias permite concluir que los perros podrían distinguir entre distintas emociones humanas ya sea en presencia de modelos en vivo o mediante la observación de imágenes y modulan su conducta conforme esta discriminación, así como también pueden utilizar esta información como clave en la resolución de problemas. Sin embargo, aún no están claros los mecanismos que subyacen a estas habilidades.

Emotional expressions play a critical role in the interactions among individuals, particularly, in social species. They provide information about the sender and the characteristics and importance of the triggering stimulus or situation, also regulating social ties. Dogs have notorious communication skills towards humans, which makes the study of their ability to recognize human emotional expressions an interesting endeavor. There have been several studies in which dogs have been tested using real people in an experimental situation as well as images, video and audio recordings of people's expressions. The evidence suggests that dogs can discriminate between different human emotions either in the presence of live models or by looking at images. This type of information has been shown to modulate their behavior and to be used as cues to solve problems. However, the mechanisms underlying these abilities are not fully understood yet.