Ignite talks - Room 2 (9:15 AM)

Ignite talks are 7-min long live presentations

5. Foraging decision in spider monkeys:  quality and recency

Reynoso-Cruz J. Eduardo-Universidad Nacional Autónoma de México, Hernandez-Salazar Laura Teresa-Instituto de Neuroetología, Vila Javier-Universidad Nacional Autónoma de México, Nieto Javier- Universidad Nacional Autónoma de México

Temporal weighting rule (TWR) is a model that proposes that recency of a patch visit and the quality of the patch are important to decide where to forage in the future, being recency, the most important variable followed by the quality. We tested if spider monkeys (Ateles geoffroyi) use recency and quality as the model predicts. Sixteen adults (8 males and 8 females) solve the task in apparatus with three containers that emulates patches. In the first experiment we manipulate the quality and the time and the data show that spider monkeys chose patches based on quality more than recency. In the second experiment we manipulate the quality by the amount of trials and again the data shows that the monkeys chose a patch based on quality. TWR propose that the organisms average the quality of the patches, but our third experiment shows that the individuals take account the total quality not the average quality. Based on the three experiments we conclude that spider monkeys take account of quality more than recency and during this process they compute the total quality to take a foraging decision. The differences in our data in relation with previous experiments will be based on the differences of feeding habits and activity patterns. Spider monkeys consume a higher percentage of fruit to increase the energy consumption since spider monkeys spend a higher percentage of their days in activities very energetically demanding.



6. Cognition in horses (Equus Caballus): A bibliometric analysis

Francisca Droguett, Pilar Herrera-Aroca, Vanetza Quezada-Scholz, Gonzalo Miguez, & Mario A. Laborda Department of Psychology, University of Chile, Santiago, Chile (affiliation of all).

Scientific research on cognition in horses (Equus Caballus) is a recent area of study with little development and systematicity. However, the available reports are already drawing a picture concerning the cognitive abilities of this animal. Thus, the goal of the present research was to describe and analyse the scientific productivity related to the study of cognition in domestic horses (Equus Caballus), focusing on four basic cognitive processes: memory, attention, learning, and perception. A preliminary search for articles was performed in the Web of Science and included keywords related to cognition and horses, in journals cataloged within Psychology or Behavioral Sciences. Then, a manual selection of articles related to the cognitive processes of interest was performed. Articles obtained were analyzed according to the following indices: Publications per year, Affiliations, Funding agencies, Collaborating countries, Relevant authors in the area, among other indicators. A total of 149 articles were preliminarily analyzed: this line of research is shown to be growing with respect to previous years (e.g., in the last 10 years, the productivity in this area of research has increased 3.6 times); There are 4 countries that have 59% of the scientific production in the area: the United States (26%), England (19%), and France (14%); French institutions concentrate the bulk of affiliations and the most authors with the largest impact in the area. In this line of research, the predominance of women as promoters of the area stands out, presenting a considerable majority of authorship.


7. Sex differences in spatial memory of felids and canids

Lisa P. Barrett - Oklahoma City Zoo, Oklahoma City, OK, USA, Tyler Boyd - Oklahoma City Zoo, Oklahoma City, OK, USA, Rebecca J. Snyder - Oklahoma City Zoo, Oklahoma City, OK, USA

The Range Size Hypothesis suggests that male and female animals differ in spatial memory ability because of corresponding differences in their home range sizes. In monogamous rodent species and otters, for instance, males and females have similar home ranges and spatial memory abilities. In polygynous species like giant pandas, males have larger home ranges and better spatial memory ability (make fewer reference and working memory errors) compared to females. We tested this hypothesis in canids (monogamous) and felids (polygynous) for the first time by presenting captive animals with an adapted radial arm maze task: 8 identical feeders, four of which were baited. We compared the number of reference and working memory errors made by males and females within each species: painted dogs, raccoon dogs, coyotes, Sumatran tigers, lions, clouded leopards, and fishing cats. We present our results in terms of the Range Size Hypothesis, but we also examine the effects of social complexity (i.e., group size). By addressing these related questions about spatial memory in carnivores, our results help elucidate the evolution of sexually-selected differences in cognition and behavior.

8. Analysis of regular patterns of changes in the aggressive behavior of Papio hamadryas during partial solar eclipses that occurred in Santiago de Chile.  

Marcial Beltrami (Facultad Cs. Básicas, Departamento de Biología, UMCE) Luis Flores-Prado (Facultad Cs. Básicas, Instituto de Entomología, UMCE) José Antonio Muñoz (Centro de investigación de complejidad social, U. del desarrollo) Pablo Polo (Centro de investigación de complejidad social, U. del Desarrollo) Guillermo Cubillos (Zoológico Nacional), Constanza Silva (Facultad Cs. Básicas. Departamento Biología, UMCE).

Partial solar eclipses are rare events in nature. Few studies have described the effects of a solar eclipse on the behavior of primates. There is no research that allows evidence of regular patterns of behavior changes in non-human primates, that include more than one solar eclipse. It is relevant to investigate behavioral changes in a non-human primate species, comparing the responses of baboons, in various solar eclipses, and to identify common patterns of changes. This species of baboon has a complex social behavior. Males have a higher social hierarchy and frequently have aggressive displays of threat and / or attack. Aggressive behavior of Papio hamadryas was compared in the National Zoo, under control conditions and during the solar eclipses of the years 1994, 2017, 2019 and 2020 (partial solar eclipses in Santiago de Chile), carrying out samplings of the type focal animal and focal group. The results obtained show a decrease in aggressive behavior in four solar eclipses, compared to the respective control groups. These results show for the first time, that a non-human primate species has the same pattern of behavioral changes in more than one solar eclipse. Aggressive behavior rate decreased from 15.1 to 3.4