Papel de sinais cromáticos na identificação de parceiros sexuais em sagüi comum (callithrix jacchus)

The literature concerning color vision shows a trichromatic advantage in detecting ripe fruits and young leaves, but there are contradictory results. There is also the suggestion of this type of vision being adapted to perceive socio-sexual signals. Indeed, Old World primates utilize the skin color of conspecifics as a factor of attraction. But in New World primates there is no record of a coloration signal in the body that can be utilized by other group members. The present study aims to: 1- test whether there is a relation between coloration of body regions and ovulatory cycle in female Callithrix jacchus; 2- Determine if this species uses visual signals to choose mates that are sexually receptive. We collected feces from six females during one month to quantify progesterone concentration by EIA. Body region coloration was measured using a portable spectrometer and modeled to obtain the quantum catch of each photoreceptor, the opponency channels and chromatic distance between the points in units of JND. We recorded the behavior of six males exposed to three pairs of females with a cycling and a non-cycling female in each pair using a transparent plexiglass apparatus. The color of different body regions presented a correlation between progesterone concentration and the yellow-blue and red-green visual axes, with the genitalia as the region showing the highest correlation. The visual axis more apt to see the color variations was the yellow-blue in dichromats, and in trichromats were the red-green to face, yellow-blue to abdomen and both chromatic axes to genitalia. There was no difference in the signal detectability between trichromats and dichromats, but the perception pattern differed between the phenotypes, with a better signal detection by the dichromat phenotype 562 and the trichromat phenotype 543/562. During the behavioral experiments males presented longer gaze duration in periods of experimental manipulation and gaze duration was always longer towards cycling females compared to non-cycling females. Male locomotion during experimental manipulation was greater than in the control only during the periovulatory period of the female, indicating greater excitement. The behavior of cycling females was more active than the behavior of the non-cycling ones regarding locomotion and touching of the plexiglass division of the apparatus. Male gaze duration to cycling females increased with decreasing progesterone concentration, but none of the coloration parameters was correlated to the mate preference exhibited. This coloration signal can transmit information to animals of the group about fertility of female. Different from the intense red of the genitalia swellings of Old World primates, marmoset female genitalia became more bluish-green in the fertile period. Males chose fertile females and were able to visually identify the periovulatory period of females. Choice is related to progesterone concentration, but our results do not show relation between coloration and mate preference. Maybe some behavioral measure is associated with the choice

Comportamento social de botos-cinza, sotalia guianensis, na praia de Pipa, RN, Brasil: dinâmica, sequência, sincronia e respostas ao turismo de observação

Social behavior of Guiana dolphins, Sotalia guianensis, at Pipa Beach, RN, Brazil: dynamics, sequence, breathing synchrony, and responses to dolphin watching. Social animals form groups that can range from temporary to permanent. Depending on the nature of the social relationships developed between individuals, groups present a particular social organization and the effect of these interactions shapes the activity patterns of these animals. This study investigates: (i) fission-fusion dynamics of Guiana dolphins, through the analysis of three dimensions of the social system (variation in spatial cohesion, variation in size and composition of groups), (ii) sequence, routine and behavioral stability, (iii) breathing intervals in synchronized groups and (iv) behavioral responses of the animals to dolphin watching. Systematic observations of Guiana dolphins were made from a platform located in cliffs about 25 m above sea level that surround Madeiro Bay, Pipa Beach. Sampling occurred from December 2007 to February 2009 between 0600 h and 1600 h, and the groups of Guiana dolphins were investigated according to their size (alone and group) and composition (adults, adults and juveniles, and adults and calves). According to the analysis of fission-fusion dynamics, Guiana dolphin groups frequently changed their composition, modifying their patterns of spatial grouping and cohesion every 20 minutes on average. More than 50% of the individuals maintained a distance of up to 2 m from other group members and new individuals were attracted to the group, especially during feeding, leaving it for foraging. Large groups were more unstable than small, while groups containing only adults were more stable than groups of adults and juveniles. According to the Z-score analysis to investigate the sequence and behavioral routine, lone individuals were more ! .7! ! involved in foraging and feeding, while resting was more common in groups. Foraging and feeding were more common in homogeneous groups (individuals of the same age class), while heterogeneous groups (different age classes) were often involved in socialization, displaying a broader behavioral repertoire. Foraging and resting behavior presented higher stability (continuous duration in minutes) than the other behaviors. The analysis of breathing intervals in synchronized groups showed significant differences depending on type of behavior, composition and area preference. During resting, breathing intervals were of longer duration, and groups with calves showed shorter breathing intervals than groups without calves. Lone individuals also preferred areas called corral , often used for the entrapment of fishes. The Markov chain analysis revealed behavioral changes in the presence of boats, according to the type of group composition. Groups composed of adults presented decreased resting and increased in traveling during the presence of boats. Groups of adults and juveniles showed a massive reduction of socialization, while the behavior transition probability traveling-traveling was higher in groups of adults and calves. In the presence of the boats, stability of resting was reduced by one third of its original duration and traveling more than doubled. The behavioral patterns analyzed are discussed in light of socio-ecological models concerning costs and benefits of proximity between individuals and behavioral optimization. Furthermore, significant changes in behavioral patterns indicate that Guiana dolphins, at Pipa Beach, have suffered the effects of tourism as a result of violation of rules of conduct established for the study area

A relação entre o microcrédito e o capital social : o caso do CEAPE PI

This study consists of a study on the presence of relationship between social capital and solidarity groups to endorse the Center for Support to Small Businesses - CEAPE - PI, the capital was measured by confidence levels and associations, considering trust as the expectations want, and learned associations between people and how the interactions among members within a group and between groups. The central research question seeks to identify whether there are linkages between the levels of social capital and the profile of members of the solidarity group CEAPE-PI. The overall objective is to analyze the level of social capital and whether these vary with the change in the profile of the solidarity group members. The method adopted in perspective cross-examined the level of social capital found in 300 of solidarity group members, collected through a survey research related to the profile of the solidarity group members, obtained with the CEAPEPI. The data show that micro-credit groups have relatively high levels for most variables, but to relate to the profile of microcredit results demonstrate the interesting points of analysis

Pau e lata para uma educação musical: uma partitura de vidas

The field of experience and reflection in this dissertation is the Pau and Lata: Artisticpedagogical project and its activities in the field of music education It was created in 1996, by the Community School Sementes da Luz, located on Tabuleiro do Martins district, Maceió / AL. The work extended to the Rio Grande do Norte and later returned to Alagoas, keeping their activities in both states, involving approximately 280 people. The issues that moved us front the experience of Pau e Lata were: What are the main references and theoretical-methodological elements that constitute the formation of the musician in Pau e Lata? How members perceive this project and include themselves in the educational process of music formation? How it works and what is the meaning of the use of instruments and the learning of musical writing and reading? These questions lead us to undertake this dissertation, in order to deepen reflection on the processes of musical training on Pau e Lata, relating the experiences of its members in the process and the theoretical references governing their educational practice. In this sense, we outline the research objectives, which are: describe the Pau e Lata project, focusing on their context of action and their methodological processes; investigate the relationship between the effective participation of its members in the process of composition of the artistic and pedagogical repertoire and its performance in the field of cultural militancy in the environment where it operates. The writing process of this research is based on the phenomenological perspective. Therefore constitute our methodological research path two roads that communicate: 1) the organization and description of historical record of Pau e Lata (supporting documents, certificates, posters, etc.) and memories of the researcher and from other members of the group. 2) the formation of focal groups and writing and sending, via online, testimonials the participants of Pau and Lata relating to issues scrap and onomatopoeia, respectively. Participated in this process 11 components, adding the presence of the researcher, with the age between 21-45 years, all members of Pau e Lata, Core UFRN. The results of this research are focused on the discussion of three axes that describe and guide the work of the Pau e Lata: collective work, the use of the scrap as instrument and the onomatopoeia as base of a methodological process of musical training. This score was composed of three parts. The first part is presented from a collection of references from Pau e Lata, composed of printed and videographic records. The second part refers to the instrument used by Pau e Lata, and the perception of group members on these instruments, which occurs so that they are integrated in the training of the musician.The third axis tells how and what it means learning of music writing and reading, that occurs in two related aspects: the teaching-learning process and the body as a musical element in this process, associated with other actions characterized as studies and theoretical deepening

Group Sequential Communication (GSC): Especificação e Análise de Desempenho de umMecanismo de Comunicação de Tempo Real Compatível ao Padrão IEEE 802.11/11e Aplicado à Automação Industrial

This thesis proposes the specification and performance analysis of a real-time communication mechanism for IEEE 802.11/11e standard. This approach is called Group Sequential Communication (GSC). The GSC has a better performance for dealing with small data packets when compared to the HCCA mechanism by adopting a decentralized medium access control using a publish/subscribe communication scheme. The main objective of the thesis is the HCCA overhead reduction of the Polling, ACK and QoS Null frames exchanged between the Hybrid Coordinator and the polled stations. The GSC eliminates the polling scheme used by HCCA scheduling algorithm by using a Virtual Token Passing procedure among members of the real-time group to whom a high-priority and sequential access to communication medium is granted. In order to improve the reliability of the mechanism proposed into a noisy channel, it is presented an error recovery scheme called second chance algorithm. This scheme is based on block acknowledgment strategy where there is a possibility of retransmitting when missing real-time messages. Thus, the GSC mechanism maintains the real-time traffic across many IEEE 802.11/11e devices, optimized bandwidth usage and minimal delay variation for data packets in the wireless network. For validation purpose of the communication scheme, the GSC and HCCA mechanisms have been implemented in network simulation software developed in C/C++ and their performance results were compared. The experiments show the efficiency of the GSC mechanism, especially in industrial communication scenarios.