Papers by Horacio de la Cueva
Revista legislativa de estudios sociales y de opinión pública, 2009
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Ciencias Marinas, Sep 1, 2013
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European Journal of Wildlife Research, Jul 8, 2023
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Latin American Perspectives, May 22, 2015
Environmental changes happen all the time. Changing environments bring about selection of organis... more Environmental changes happen all the time. Changing environments bring about selection of organisms, and there is no organism that does not modify its environment to make a living, survive, and reproduce. These changes are the main motors of evolution and, consequently, the main cause of biodiversity. Environmental violence—unsustainable use and extraction of natural resources—is the way capitalist economies exploit nature. The extinction rates associated with the current unsustainable use of resources are sufficient to assume that we are experiencing a sixth mass extinction event. The rate at which humans are transforming the environment leaves no time for evolutionary adaptation. We need to reduce environmental violence for life to maintain its normal processes. Without knowledge of nature and the consequences of violence against nature, we will become another of the planet’s extinct species. Los cambios ambientales ocurren todo el tiempo. Los ambientes cambiantes propician la selección de organismos y no hay organismo que no modifique su ambiente para subsistir y reproducirse. Estos cambios son los principales motores de la evolución y por lo tanto la causa principal de la biodiversidad. La violencia ambiental—el uso y la extracción insostenibles de los recursos naturales—es la manera en que las economías capitalistas explotan la naturaleza. Las tasas de extinción asociadas con el uso insostenible de los recursos son suficientes para considerar que estamos experimentando la sexta extinción masiva de especies. El ritmo al cual los seres humanos están transformando el ambiente no deja tiempo para la adaptación evolutiva. Necesitamos reducir la violencia ambiental para que la vida pueda mantener sus procesos normales. Sin el conocimiento de la naturaleza y de las consecuencias de la violencia contra ella, nos convertiremos en otra de las especies extintas de nuestro planeta.
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European Journal of Wildlife Research, May 20, 2023
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Springer eBooks, 2023
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Latin American Journal of Aquatic Research, Aug 31, 2022
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Therya
Manatees are threatened along their range. In México, this species is listed as endangered. Man... more Manatees are threatened along their range. In México, this species is listed as endangered. Manatee conservation strategies require density or occupancy estimates, especially in areas where species face survival risks. On turbid waters, like those found in rivers and lakes of the Southern Gulf of México coast, visual methods used to detect and count manatees underestimate actual numbers. Our goal was to estimate the density and abundance (N) of Antillean manatees in a small State Natural Protected Area, where a manatee population of unknown size inhabits. We performed line transects using a side scan sonar to detect animals and mark-recapture in the isolated population of manatees within Laguna de las Ilusiones, México, a landlocked lake that excludes transit. Using distance sampling from 14 boat trips, estimates of density and abundance were 15.5 manatees km-2 and 27 ± 5 manatees in the lake (CV ≈ 16.6 %). With MARK, from six capture events and 19 individual encounter record...
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Arrecife Alacranes, the northernmost reef zone of the Gulf of Mexico, harbors the largest nesting... more Arrecife Alacranes, the northernmost reef zone of the Gulf of Mexico, harbors the largest nesting seabird concentrations of the region (ca. 70,000 nests), and is a Mexican federal protected area. Some important threats to the area are oil extraction, introduced species (main cause of extinction in islands), fisheries, and tourism. Black rats (Rattus rattus) and casuarina trees occur in Isla Perez, one of the reef’s islands, and a plan for the rodent eradication is under way. The last seabird census reported was done in 1986. In May and August 2009 we made surveys to monitor their present populations. Direct nest counts were carried out, with complementary counts on photographs. The total nests found per island were: Perez: 139,116 Sterna fuscata, 1,039 Anous stolidus; Muertos: 827 Sula dactylatra, 10 S.sula, 50 Fregata magnificens; Pájaros: 64 S.dactylatra; Chica: 22 S.dactylatra; Desterrada: 82 S.leucogaster. Our information revealed much larger numbers than those previously reported for S. fuscata, S. dactylatra, and S. sula, but less for F. magnificens. Protection of the area could be one factor to explain the increment in the seabird nesting numbers, and it will be interesting to see what changes occur after the rodent eradication is carried out, but also, effects of the BP oil spill may be detected
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Canadian Journal of Zoology, 1990
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Contemporary Mathematics, 1993
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Ecofronteras, 2019
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BioScience, 2018
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Huitzil Revista Mexicana de Ornitología, 2016
Más del 26% de las especies de aves que habitan en México está declinando. Los ornitólogos han pr... more Más del 26% de las especies de aves que habitan en México está declinando. Los ornitólogos han propuesto diversas accionespara conservar algunas de ellas; sin embargo, se han hecho pocos esfuerzos por difundirlas. En este escrito, tomando en cuenta lasnueve pláticas presentadas en un simposio científico realizado en 2015, resumimos la información sobre los esfuerzos de conservaciónde aves que se están llevando a cabo en el país. Dividimos los estudios en tres categorías: los que analizan cómo se hacela conservación en México, los que hacen conservación práctica y los que constituyen investigación ecológica básica tendientea la conservación de dichas especies. Concluimos que los esfuerzos de conservación de aves en el país son insuficientes y que senecesitan realizar más acciones para evitar la pérdida de la diversidad de aves en México.
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Western Birds, 2021
We summarize existing literature and document a recent steep population decline and range contrac... more We summarize existing literature and document a recent steep population decline and range contraction in the Tricolored Blackbird (Agelaius tricolor) at the southern end of its range, in Baja California, the only state of Mexico in which the species occurs. From >1000 nesting birds using at least 14 sites south to 30° N around the turn of the 21st century, the population declined and contracted northward and upward in elevation to a single colony of ~150 nesting birds near the international border in 2019. Chronic drought, rising temperatures, and habitat losses due primarily to intensification of agriculture in Mexico are largely responsible for the decline, as in the core of the species’ range in California. Because of the reduction of breeding and foraging habitat, we fear the imminent extirpation of the species in Mexico.
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Huitzil, Revista Mexicana de Ornitología, 2018
Para determinar caracteres diagnósticos de utilidad en la identificación taxonómica infraespecífi... more Para determinar caracteres diagnósticos de utilidad en la identificación taxonómica infraespecífica de la codorniz de California (Callipepla californica) de la península de Baja California, comparamos fenotípicamente cuatro subespecies nominales mediante el análisis estadístico multivariado de 18 caracteres: nueve morfométricos y nueve colorimétricos. Examinamos 338 especímenes de museos provenientes de 114 sitios, comparándolos por subespecie y localidad tipo. El análisis de componentes principales (ACP) no pudo determinar grupos congruentes con las subespecies taxonómicas a pesar de que los caracteres asociados con las medidas del pico y de coloración en ambos sexos tuvieron un poder de discriminación significativo. El análisis de función discriminante (AFD) presentó diferencias significativas en las categorías de comparación a priori, P…
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