Background: A spider monkey with severe dyspnea was referred to our clinic.
Methods And Results: Radiographs revealed an enlarged cardiac silhouette. Ventricular tachycardia and ST segment depression were also diagnosed after an ECG. These findings coupled with the postmortem examination confirmed dilatative cardiomyopathy.
Conclusions: This case is worthy of presentation since dilatative cardiomyopathy has been rarely encountered in spider monkeys.
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http://dx.doi.org/10.1111/j.1600-0684.2011.00530.x | DOI Listing |
Biomimetics (Basel)
October 2024
Air Traffic Management Institute, Civil Aviation Flight University of China, Deyang 618307, China.
This paper proposes an Improved Lemur Optimization algorithm (ILO), which combines the advantages of the Spider Monkey Optimization algorithm, Simulated Annealing algorithm, and Lemur Optimization algorithm. Through the use of an adaptive nonlinear decrement model, adaptive learning factors, and updated jump rates, the algorithm enhances its global exploration and local exploitation capabilities. A Gaussian function model is used to simulate the mountain environment, and a mathematical model for UAV flight is established based on constraints and objective functions.
View Article and Find Full Text PDFAm J Primatol
December 2024
Escuela Nacional de Estudios Superiores unidad Mérida (ENES-Mérida, UNAM), Mérida, Yucatán, Mexico.
Folia Primatol (Basel)
August 2024
Red de Biología y Conservación de Vertebrados, 56077Instituto de Ecología A.C., Carretera antigua a Coatepec 351, C.P. 91073, Xalapa, Veracruz, México.
Audiovisual media has become an integral part of conservation education strategies, with the potential not only to communicate information but also to impact on its viewers perceptions and attitudes towards a particular subject. Despite this potential, few studies have evaluated either the use of film for primate conservation initiatives or the wider impact of participatory film production. Our study evaluates the impact of a participatory documentary film about historic human-primate coexistence in the Los Tuxtlas region, Veracruz, Mexico, to improve people's knowledge, perception, and attitudes towards the local primate species, Alouatta palliata and Ateles geoffroyi.
View Article and Find Full Text PDFSensors (Basel)
August 2024
Instituto de Neuroetología, Universidad Veracruzana, Av. Dr. Luis Castelazo Ayala, Xalapa 91190, Veracruz, Mexico.
Geoffroy's spider monkeys, an endangered, fast-moving arboreal primate species with a large home range and a high degree of fission-fusion dynamics, are challenging to survey in their natural habitats. Our objective was to evaluate how different flight parameters affect the detectability of spider monkeys in videos recorded by a drone equipped with a thermal infrared camera and examine the level of agreement between coders. We used generalized linear mixed models to evaluate the impact of flight speed (2, 4, 6 m/s), flight height (40, 50 m above ground level), and camera angle (-45°, -90°) on spider monkey counts in a closed-canopy forest in the Yucatan Peninsula, Mexico.
View Article and Find Full Text PDFAnim Cogn
August 2024
IFM Biology, Linköping University, Linköping, SE-581 83, Sweden.
Recent research suggests that socio-ecological factors such as dietary specialization and social complexity may be drivers of advanced cognitive skills among primates. Therefore, we assessed the ability of 12 black-handed spider monkeys (Ateles geoffroyi), a highly frugivorous platyrrhine primate with strong fission-fusion dynamics, to succeed in a serial visual reversal learning task. Using a two-alternative choice paradigm we first trained the animals to reliably choose a rewarded visual stimulus over a non-rewarded one.
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