Evaristo Rojas Mayoral

• Master of Science
• Director of Data Science at Grupo de Ecología y Conservación de Islas

Invasive rodents are present on approximately 90% of islands worldwide, posing a serious threat to endemic and native island species and making rodent eradication central to island conservation. Aerial broadcast is the preferred method for dispersing rodenticide bait. Therefore, accurate bait density maps must be generated in real-time to maximize...

The Baja California Pacific Islands (BCPI) is a seabird hotspot in the southern California Current System supporting 129 seabird breeding populations of 23 species and over one million birds annually. These islands had a history of environmental degradation because of invasive alien species, human disturbance, and contaminants that caused the extir...

San Benito Archipelago is internationally important for the conservation of 13 species of seabirds. San Benito Oeste, the largest and only inhabited island, was declared mammal-free in 2000 after a series of eradications conducted in collaboration between the fishing cooperative Pescadores Nacionales de Abulón, the Mexican conservation organization...

The Baja California Pacific Islands (BCPI) is a seabird hotspot in the southern California Current System supporting 129 seabird breeding populations of 23 species and over one million birds annually. These islands had a history of environmental degradation because of invasive alien species, human disturbance, and contaminants that caused the extir...

We evaluated the existence of sexual dimorphism in Laysan albatross from Guadalupe Island. Males were larger than females across all the morphological variables analyzed. We created a sex predictor model for Laysan albatross individuals that requires a minimum number of input variables and will considerably reduce the handling times and field costs...

Simple Summary We evaluated the existence of sexual dimorphism in Laysan albatross from Guadalupe Island. Males were larger than females across all the morphological variables analyzed. We created a sex predictor model for Laysan albatross individuals that requires a minimum number of input variables and will considerably reduce the handling times...

Socorro Island is part of the Revillagigedo National Park, Mexico. At 132 km2, it is the Mexican island with the highest level of endemism. It provides habitat for 117 vascular plant species, 26% of which are endemic. There is also an endemic blue lizard (Urosaurus auriculatus) and eight endemic terrestrial birds. Socorro’s ecosystem had been heavi...

Invasive rodents are present on approximately 80% of the world’s islands and constitute one of the most serious threats to island biodiversity and ecosystem functioning. The eradication of rodents is central to island conservation efforts and the aerial broadcast of rodenticide bait is the preferred dispersal method. To improve the effi ciency of r...

The Baja California Pacifi c Islands, Mexico, are globally important breeding sites for 22 seabird species and subspecies. In the past, several populations were extirpated or reduced due to invasive mammals, human disturbance, and contaminants. Over the past two decades, we have removed invasive predators and, for the last decade, we have been impl...

Islands are biodiversity hotspots that offer unique opportunities for applied restoration techniques that have proven to bring inspiring outcomes. The trajectory of island restoration in Mexico is full of positive results that include (1) the removal of 60 invasive mammal populations from 39 islands, (2) the identification of conservation and resto...

México tiene en sus islas una riqueza natural extraordinaria. El país, con sus más de cuatro mil islas, islotes y cayos, es una de las naciones con más islas en el planeta. La riqueza está, más que en el tamaño del territorio insular, en la riqueza biológica, en los recursos naturales de sus aguas adyacentes y en la Zona Económica Exclusiva que el...

Eradications of invasive rodents from tropical islands have a lower success rate compared to temperate islands. In the tropics the wide range of physical and biological conditions results in a wide variety of island biomes, with unique challenges and windows of opportunity for rodent eradications. We describe and compare research and operational de...

Socorro Island, in the Revillagigedo Archipelago, has the highest number of endemisms of any Mexican island. It provides habitat for 117 vascular plants, 26 % of which are endemic to the island. Also endemic to the island are one reptile and eight terrestrial bird species. However, the local ecosystem has been heavily degraded by exotic mammals ove...

For over 140 years, the habitat of Socorro Island in the Mexican Pacific has been altered by the presence of exotic sheep. Overgrazing, jointly with tropical storms, has caused soil erosion, and more than 2000 hectares of native vegetation have been lost. Sheep eradication was conducted from 2009 to 2012. Since then, the vegetation has begun to rec...

El trabajo describe las experiencias docentes de maestros del laboratorio de F ́ısica II, en la Facultad de Ciencias Marinas, donde se propone una pra ́ctica de laboratorio, en la cual el estudiante debe crear una adaptacio ́n que se ajuste a un instrumento de medicio ́n, para poder medir el nivel del agua en un canal de oleaje. Para ello so ́lo de...

Vertical distribution of chlorophyll a (Chla) in the euphotic zone has been described and modeled by a Gaussian curve representing those cases where there is a single Chla maximum (surface or subsurface). This has led to the rejection of profiles with more than one chlorophyll peak, resulting in the removal of up to 18% of the profiles. The aim of...

It is proposed that the diffusion equation can be solved using second-order mimetic operators for the spatial partial derivatives, in order to obtain a semi-discrete time scheme that is easy to solve with exponential integrators. The scheme is more stable than the traditional method of finite differences (centered on space and forward on time) and...

Uno de los principales problemas que acontece la investigación oceanográfica es la dificultad, en muchos casos, de conocer los parámetros fisicoquí-micos de importancia en el océano. Esto se refleja en los altos costos de los cruceros oceanográficos para tales fines. La Tomografía Acústica del océano es una técni-ca computarizada que permite inferi...

Se propone una nueva forma de interpolación, utilizando la fórmula de la derivada de tres puntos (adelantada, centrada y atrasada) y factores de peso usadas por Lagrange. Juntando estas dos ideas, se pretende lograr una interpolación más precisa con un polinomio de segundo grado para una cantidad mayor o igual a cuatro datos. Dado un conjunto de da...

An inexpensive and easily implemented device to measure wind velocity is proposed. This prototype has the advantage of being able to measure both the speed and the direction of the wind in two dimensions. The device utilizes a computational interface commonly referred to as a mouse. The mouse proposed for this prototype contains an optical sensor w...

El “Programa de Manejo de la Erosión Costera en la Celda Litoral III de la Bahía de Todos Santos, Baja California, México (ProMEC-III)” es una iniciativa municipal de visión local que responde a una de las estrategias desarrolladas en el Programa Parcial de Conservación y Mejoramiento Urbano El Naranjo-Chapultepec. El objetivo del ProMEC-III es, po...

Using elementary principles of physics, an easy way of a building a current meter to be used in laboratories or natural water bodies is shown. Also shown is how it is possible to enter the fluid velocity data into the computer through a "mouse" and a simple computer program. Advantages and disadvantages, as well as device calibration, are explained...

Using elementary principles of physics, an easy way of a building a current meter to be used in laboratories or natural water bodies is shown. Also shown is how it is possible to enter the fluid velocity data into the computer through a “mouse” and a simple computer program. Advantages and disadvantages, as well as device calibration,are explained.