E. Pérez

Adaptation in the eye and brain contributes to species divergence in visual perception in Heliconius butterflies

Daniel Shane Wright, José Borrero, Yi Peng Toh, Lisa Ammer et autres

Abstract Sensory systems mediate the interaction between organisms and their environment, but how complex sensory pathways evolve and relate to variation in perception and behavior across ecological contexts, remains poorly understood, especially for terrestrial taxa. Here, we investigate whole-visual-system adaptation in Heliconius …

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Weighting of sensory cues reflect changing patterns of visual investment during ecological divergence in Heliconius butterflies

José Borrero, E. Pérez, Daniel Shane Wright, Daniela Lozano-Urrego et autres

Integrating information across sensory modalities enables animals to orchestrate a wide range of complex behaviours. The relative importance placed on one sensory modality over another reflects the reliability of cues in a particular environment and corresponding differences in neural investment. As populations …

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A life-history allele of large effect shortens developmental time in a wild insect population

Shixiong Cheng, Chris G. C. Jacobs, E. Pérez, Daipeng Chen et autres

Developmental time is a key life-history trait with large effects on Darwinian fitness. In many insects, developmental time is currently under strong selection to minimize ecological mismatches in seasonal timing induced by climate change. The genetic basis of responses to such selection, …

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Development of a Mobile Application for Orientation of Visitors of ITCA-FEPADE through mapping, 3D rendering and Global Positioning

E. Pérez, Eva Margarita Pineda, Héctor Edmundo González Magaña, Ricardo Ernesto Hernández Ávila

The use of mobile applications that use global mapping and geolocation technology is varied and is used in both cars and cell phones, the latter being the ones with the greatest demand by the population. Among the most used applications we have …

Genetic parameters of litter size in two selected population of Churra breed.

Juan Pablo Gutiérrez, Juan Pablo Sánchez, Luis Fernando de la Fuente, E. Pérez

Is it worth to recuperate degraded pasturelands? An evaluation of profits and costs from the perspective of livestock producers and extension agents in Honduras

Federico J. Holmann, Pedro J. Argel M., Libardo Rivas Ríos, Douglas S. White et autres

The objectives of this study were to: (a) estimate milk and beef yields obtained from cows grazing pastures in different stages of degradation; (b) estimate income losses as a result of the degradation process; (c) estimate the proportion of pasture areas found …

Seasonal variations in testicular consistency, scrotal circumference and spermiogramme parameters of extensively reared Brahman (Bos indicus) bulls in the tropics

Jorge Chacón, E. Pérez, Heriberto Rodríguez‐Martínez

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Sexual behaviour of Zebu bulls in the humid tropics of Costa Rica: single versus multiple-sire groups

R. Molina, I. V. Bolaños, Carlos Salvador Galina, E. Pérez et autres

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Breeding soundness evaluation of extensively managed bulls in Costa Rica

Jorge Chacón, E. Pérez, Etienne E. Müller, Lennart Söderquist et autres

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Prospective Study for the Detection of Anaplasma marginale Theiler, 1911 (Rickettsiales: Anaplasmataceae) in Costa Ricaa

Marco V. Herrero, E. Pérez, Will L. Goff, Susana Torioni de Echaide et autres

A prospective study was conducted to assess the dynamics of the infection and host response to Anaplasma marginale in one closed herd in the dry tropical forest of Costa Rica. The study subjects were the dams and their calves born during 1 …

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First report of bovine neosporosis in dairy cattle in Costa Rica

E. Pérez, O. González, Gaby Dolz, J. Morales et autres

NEOSPOROSIS has recently been recognised as a major cause of \nabortion in dairy cattle worldwide (Barr and others 1990, Duff \nand Otter 1994, Boulton and others 1995). The disease is caused \nby the protozoan parasite, Neospora caninum, which is closely \nrelated to …

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Infectious agents associated with diarrhoea of calves in the canton of Tilarán, Costa Rica

E. Pérez, Anne Kummeling, M.M.H Janssen, Carlos Jiménez et autres

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