Article
Biochemistry & Molecular Biology
Linett Rasmussen, Claudia Fontsere, Ivan D. Soto-Calderon, Rosamira Guillen, Anne Savage, Anders Johannes Hansen, Christina Hvilsom, M. Thomas P. Gilbert
Summary: The critically endangered cotton-top tamarin has been threatened by human activities, causing habitat loss and population decline. This study aimed to establish a genetic baseline through temporal sampling to understand the genetic makeup before anthropogenic impacts. By resequencing genomes from historical and modern samples, two populations were identified, separated historically by mountain ranges. The modern populations show signs of inbreeding and loss of genomic diversity, likely due to population reduction and ongoing habitat loss. However, there is no evidence of an increase in genetic load. The historical genetic baseline can provide insight into the alteration of current populations and inform conservation decision-making.
Article
Agriculture, Dairy & Animal Science
Sergio Diaz, Susana Sanchez, Ana Fidalgo
Summary: Cotton-top tamarins engage in cooperative breeding where helpers contribute to infant care. Grooming interactions are important for social relationships and create interconnected social networks. Social network analysis revealed that group A remained stable after the birth, while group B (without adult helpers) showed changes in their grooming network and decreased density. Infant carrying did not correlate with increased grooming centrality. These findings highlight the usefulness of social network analysis and the impact of offspring birth on groups without adult helpers.
Article
Zoology
Catharine J. Wheaton, Katie L. Feilen, Luis H. Soto, Felix Medina, German Emeris, Rosamira Guillen, Anne Savage
Summary: This study examines the reproductive patterns of the Critically Endangered cotton-top tamarin in Santa Catalina, Colombia and finds that they exhibit seasonal reproduction and pregnancy loss. The results also show positive correlations between nectarivory, rainfall, and frugivory with peak conception, birth, and mid-lactation.
AMERICAN JOURNAL OF PRIMATOLOGY
(2022)
Editorial Material
Behavioral Sciences
Samin Gokcekus, Rahel K. Brugger, Judith M. Burkart
Summary: Most cultural behaviors in primates are rooted in beneficial innovations that provide access to food or comfort, however, the spread of seemingly purposeless and arbitrary innovations within a social group is rare but important for understanding the evolutionary origin of culture. An anecdotal report of woodchip manipulation events in captive cotton-top tamarins suggests that arbitrary innovations are actively shared among conspecifics.
Article
Zoology
Anne Savage, Leysthen Diaz, Johana Pasion, Katherine Torregroza, Rosamira Guillen
Summary: This study examines the efforts of Proyecto Titi to reduce the desire to have a cotton-top tamarin as a pet, focusing on creating an emotional connection between people and the species, understanding the challenges faced by cotton-top tamarins when kept as pets, and empowering students to make positive choices to help protect the species. The TITI KIDS and TITIRITIANDO programs increased students' knowledge of cotton-top tamarins, helped them understand the damage caused by the pet trade, and provided practical actions for protecting the species.
AMERICAN JOURNAL OF PRIMATOLOGY
(2023)
Article
Zoology
Gabriele Schino, Carla Cherubini, Benedetta Pellegrini Quarantotti, Massimiliano Di Giovanni
Summary: We observed a group of zoo-housed cotton-top tamarins before and after a severe targeted aggression event. The aggression was extreme and repeated, resulting in the removal of the victims and aggressor. Before removal, the tamarins showed increased aggression, a more strict dominance hierarchy, and reduced post-conflict reconciliation compared to the period after removal. Affiliative interactions and patterns of reciprocity remained stable. These findings highlight the flexibility of tamarin social relationships and have implications for managing captive colonies and improving animal welfare.
Article
Chemistry, Physical
Luigi Zanovello, Pietro Faccioli, Thomas Franosch, Michele Caraglio
Summary: We found that the microswimmer can enhance its success rate in finding the target by adjusting its activity and persistence in response to the environment. The target-search patterns of active Brownian particles are counterintuitive and display robust characteristics to changes in the energy landscape. Unlike in the passive case, the presence of additional local minima does not significantly slow down the active-target-search dynamics.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Forestry
Filipe M. Ferreira, Saulo F. S. Chaves, Leonardo L. Bhering, Rodrigo S. Alves, Elizabete K. Takahashi, Joao E. Sousa, Marcos D. V. Resende, Fernando P. Leite, Salvador A. Gezan, Jose M. S. Viana, Samuel B. Fernandes, Kaio O. G. Dias
Summary: This study investigates the impact of indirect genotypic effects on the response to selection and proposes a methodology to predict the performance of clonal composite combinations and select the one with the highest yield. By considering spatial variation and interplot competition, the total heritable estimates and response to selection in forest trials can be more accurately evaluated. Additionally, the clones are classified into aggressive, homeostatic, and sensitive types based on their deviation from the mean of indirect genotypic effects.
FOREST ECOLOGY AND MANAGEMENT
(2023)
Article
Behavioral Sciences
Julie J. Neiworth, Ana D. Knighten, Christopher Leppink-Shands
Summary: This study found that tamarins have the ability to use visual or auditory exclusion cues to find rewards, but the visual cues require some exposure before accuracy is expressed. The results suggest that tamarins can deduce the location of food using reasoning, although the ability is only applied robustly to first guesses, while second guesses are motivated by approach/avoidance and proximity to cued locations.
JOURNAL OF COMPARATIVE PSYCHOLOGY
(2023)
Article
Behavioral Sciences
Natalie Schwob, Ricky Groner, Amy L. Lebkuecher, Sylvia Rudnicki, Daniel J. Weiss
Summary: Complex motor planning, such as grasping objects in preparation for future actions, has an extended developmental trajectory in humans and nonhuman primates. A study involving cotton-top tamarins found that these primates consistently used a more efficient radial grasp rather than an inefficient ulnar grasp. This supports the idea that species with limited dexterity may demonstrate more consistent second-order motor planning due to the increased cost of inefficient grasping postures.
JOURNAL OF COMPARATIVE PSYCHOLOGY
(2022)
Article
Psychology, Experimental
Yue Chen, Weimin Mou
Summary: This project tested the interaction between self motion-based path integration and landmark-based piloting in a familiar environment. The results showed that path integration functions automatically in the absence of persistent landmarks, and that persistent landmarks suppress path integration. Path integration also updates the spatial views of the environment. The updated spatial views help eliminate ambiguous targets or landmarks within the familiar environment.
Article
Engineering, Electrical & Electronic
Lun Yang, Yinliang Xu, Hongbin Sun, Moyuen Chow, Jianguo Zhou
Summary: This paper proposes a new restoration approach using distributed energy resources to restore critical loads, formulating the critical load restoration problem as a variation of the shortest path problem and developing a distributed approach framework to maximize the reliability of the restoration plan and reduce post-restoration failures. The proposed distributed restoration approach is adaptive to topology changes and robust to unreliable communication networks, as demonstrated by numerical results with various scenarios.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Computer Science, Information Systems
Baili Zhang, Kejie Wen, Jianhua Lu, Mingjun Zhong
Summary: This paper proposes a top -k QoS-optimal service composition approach suitable for IoT, aiming to construct the relationship between services by applying the service dependency model and reduce traversal space through effective filtering strategies. Experimental results show that the approach can obtain the top -k QoS-optimal service composition and better time performance.
JOURNAL OF ORGANIZATIONAL AND END USER COMPUTING
(2021)
Article
Neurosciences
Diogo Joao Tomas, Pedro Nascimento Alves, Maria Vania Silva-Nunes
Summary: This paper presents a behavioral study of healthy individuals to investigate the performance of inferential memory tasks and spatial orientation tasks in a virtual environment. The results show a positive correlation between inferential memory and spatial orientation task performances, which supports the relational theory of the hippocampus. The findings are also consistent with the cognitive map theory, suggesting a potential association between the hippocampus and allocentric spatial representations.
BRAIN AND COGNITION
(2023)
Article
Environmental Studies
Teva Meyer
Summary: This study examines the spatial embeddedness and path dependency of nuclear power plants through comparing the closure of two facilities in Germany and France. The results show that the spatial relational territorialities of different nuclear plants vary, and the opposition to closures is stronger where deeper forms of spatial embeddedness exist. The path dependency of nuclear power plants is influenced by preexisting spatial characteristics, social representations, monetary flow, actions of workers, and normative elements.
ENERGY RESEARCH & SOCIAL SCIENCE
(2021)
