Christian A. Delfín-Alfonso

Christian A. Delfín-Alfonso
Universidad Veracruzana | UV · Instituto de Investigaciones Biológicas

Dr. Recursos Bióticos

About

53
Publications
55,909
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
317
Citations

Publications

Publications (53)
Article
Environmental heterogeneity is expected to increase the richness and diversity of species. The aim of this study is to identify environmental elements that influence the richness and diversity of small, medium and large species of mammals. For the sampling of mammals, camera and Sherman traps were used at 18 sampling stations. For vegetation sampli...
Chapter
Full-text available
Los roedores y los soricomorfos son dos de los órdenes de mamíferos mejor representados en México, su relevancia ecológica radica en ser la base para las cadenas tróficas de vertebrados mayores y suelen ser especies representativas de la salud del ecosistema. No obstante, las perturbaciones ambientales por actividades humanas, han afectado sus pobl...
Article
Full-text available
Despite being one of the most common odontocetes off Sinaloa (Mexican Pacific coast), basic studies on the ecology of common bottlenose dolphins (Tursiops truncatus) are scarce in the region. This study aimed to describe changes in the relative abundance, group size, and behavior of this species during 2007 – 2012. We used boat-based surveys and sa...
Article
In coastal populations of the common bottlenose dolphin, resident females are usually more abundant and have more restricted home ranges than males. Here, we studied sex-specific population dynamics of bottlenose dolphins off the Alvarado Lagoon System, southwestern Gulf of Mexico. We used standard photo-identification and capture-mark-recapture me...
Article
Full-text available
The presence of transient and temporary individuals in capture-mark-recapture studies may violate the assumption on equal catchability, and thus yield biased estimates. We investigated the effects of residency patterns on population parameters of bottlenose dolphins inhabiting the coastal waters off the Alvarado Lagoon System (ALS), Veracruz, Mexic...
Article
Full-text available
Context Black bear connectivity studies are scarce in the southern distribution where the species is endangered. The identification of corridors is a strategy to promote conservation in human-modified landscapes. Objectives Assess and validate long-distance corridors in the southern black bear distribution using resistance models, occurrence recor...
Conference Paper
Full-text available
Until recently, minke whale sightings in the northern Atlantic Ocean (NA) were thought to belong exclusively to the common species Balaenoptera acutorostrata (CMW). Historical records confirm the presence of the CMW in the north-eastern Caribbean Sea during the winter months. However, the Antarctic minke whale (B. bonaerensis) (AMW) has been recent...
Article
Full-text available
Diet is an essential component of the natural history and ecology of organisms. Many snake species' trophic ecology is poorly characterized, mainly because predation events are rarely documented in nature. The diet of Micrurus diastema has been reported so far to include only other snakes. To obtain further knowledge on the species diet, we perform...
Article
Full-text available
Anthropogenic threats have increasingly isolated the populations of Mazama temama (Erxleben, 1777) and limited the gene flow in this species. Knowledge of the phylogeographic structure of this species is therefore essential for its conservation. Thus, in this study, we describe the phylogeographic structure of two M. temama populations of Veracruz...
Article
Full-text available
Studying activity patterns of canopy mammals provides information on the biology of these species. However, the challenges of reaching and sampling the forest canopy restrict the information available on activity patterns. This study aimed to describe the activity patterns of canopy mammals, and analyze their temporal overlap, in the Santa Gertrudi...
Article
Full-text available
Several species of insects have been found in propagules of species of mangrove forest, but Coccotrypes rhizophorae (Hopkins) (Coleoptera: Curculionidae) has been recorded as one of the main pest of Rhizophora mangle (L.) (Malpighiales: Rhizophoraceae). While the species of mangrove is common in the Gulf of Mexico, the insect fauna associated with...
Chapter
Full-text available
The bottlenose dolphin (Tursiops truncatus) is possibly the best known dolphin worldwide and their ecology and biology has been widely documented; however, research on this species in Mexico is re- cent, and the populations of the Gulf of Mexico have been less studied. In this work, we documented the fundamental aspects of the population ecology (d...
Article
Behavioural plasticity in animals is tested whenever competitive interactions for space and/or food resources occur between wildlife and human activities. This study uses the concepts of operational and non-operational interactions between bottlenose dolphins ( Tursiops truncatus ) and artisanal fisheries in Alvarado, to search for differences in b...
Article
Full-text available
Oviposition in elusive reptiles has been poorly documented due to the difficulty in observing it in natural habitats. Here, we document the first egg-laying record in the Eastern Casque-headed Basilisk Laemanctus longipes in the wild. Our record adds novel information about the oviposition of this scarcely studied reptile species. Key words. Egg la...
Article
Full-text available
Bats are organisms considered both beneficial and harmful animals. However, there are diverse anthropogenic factors (persecution or vandalism, pesticides, and habitat destruction) that affect them. For this reason, it is important to have a current diagnosis of the situation of the bat community that lives in different refuges. As an alternative to...
Article
Full-text available
Oviposition in elusive reptiles has been poorly documented due to the difficulty in observing it in natural habitats. Here, we document the first egg-laying record in the Eastern Casque-headed Basilisk Laemanctus longipes in the wild. Our record adds novel information about the oviposition of this scarcely studied reptile species.
Article
Full-text available
ABSTRACT.—The eastern cottontail rabbit (Sylvilagus floridanus; ECR) is highly adaptable to human activities and widely distributed across the Yucatan Peninsula. However, the eastern part of the peninsula, where the Mexican state of Quintana Roo is located, had only marginal records. Herein, we report the collection of one individual and the observ...
Poster
Full-text available
Introducción: El aprovechamiento de fauna silvestre es una actividad practicada desde tiempos remotos por comunidades rurales; por tanto, entender su aprovechamiento y su uso tradicional, proporciona una visión amplia y objetiva que puede emplearse en la elaboración de programas de manejo. Este trabajo documenta el uso de mamíferos silvestres en el...
Poster
Full-text available
Introducción: Veracruz es un mosaico de ecosistemas, que favorece la presencia de comunidades de pequeños mamíferos, cuyos estatus de conservación son inestables, producto de acciones antropogénicas sobre los recursos naturales. Nuestro objetivo fue identificar áreas susceptibles de conservación de mamíferos (pequeños) endémicos a México y presente...
Chapter
Full-text available
The state of Veracruz is recognized for its mammalian diversity. The first modern studies on the subject date back to the mid-eighteenth century. Based on the review of specimens in the mammal collection at the Biological Research Institute of the University of Veracruz, an updated inventory of wild land mammals in the state is presented, as well a...
Article
Full-text available
The Protected Natural Area (PNA) "Corredor Biológico Chichinautzin" contains a large area of bunchgrasses, a habitat that is necessary for the zacatuche rabbit to survive. As part of a monitoring program used to evaluate the status of the zacatuche rabbit's populations within this PNA, we estimated its distribution by using direct (sightings) and i...
Conference Paper
Full-text available
Stocks are relevant for effective management and conservation actions, but this concept is rare in Mexican policies and studies involving marine mammals, where "populations" are often defined arbitrarily and commonly based on a single attribute. This study attempts to determine if bottlenose dolphins inhabiting the Veracruz Reef System (VRS) and th...
Article
Full-text available
INTRODUCCIÓN: En México, el estado de Oaxaca ocupa el segundo lugar en riqueza de mamíferos; sin embargo, la pérdida de hábitat y la caza furtiva han dado lugar a la disminución y extinción de varias especies de flora y fauna. El presente estudio se centró en determinar la riqueza de especies y la abundancia relativa de mamíferos de talla mediana y...
Conference Paper
Climate change could have major impacts on ecosystems and their regulation capacity of vector-borne diseases, especially in combination with other human impacts that alter ecological integrity. Leishmaniases are zoonotic diseases with about 2 million new cases each year worldwide. In the Americas they are present from southern USA to Argentina....
Conference Paper
Ecosystems envelop a wide array of processes; they are the arena where biodiversity is produced and developed. They are governed by the interlinked effects of many factors as well as randomness. Since the factors influencing these processes can only be partially observed, modeling aimed at decision support needs to capture these uncertainties. B...
Conference Paper
Having recently proclaimed the advent of the anthropocene, we see rapid changes in the earths ecosystems. However and in spite of various international efforts to formulate binding policies to protect biodiversity or mitigate climate change, little is known about the interactions and linkages within ecosystems, for instance biodiversity and ecos...
Article
Full-text available
The Neotropical river otter (Lontra longicaudis annectes) is a carnivore of wide distribution, poorly studied and their populations are subjected to considerable pressure all over its range, the otter is closely linked to shore ecosystems, therefore a description of the their distribution is basic to allow conservation. By knowing the otter's prefe...
Article
Full-text available
Defining areas of potential distribution for large carnivores is a critical step for generating conservation strategies. Ecological niche modelling is an important tool for identifying potential areas for conservation of carnivores, such as American black bears (Ursus americanus) in the Sierra Madre Occidental (SMOcc) and the Sky Islands (SI) regio...
Article
Knowledge about the distribution of most species is incomplete and fragmentary, due to few records in scientific collections and a lack of reliable observations. The American black bear (Ursus americanus) provides a good example, especially in NW Mexico. Our objective was to retrieve historical data and document current occurrence of the species in...
Article
Full-text available
negro americano (Ursus americanus) particularmente al NO de México. El objetivo fue recuperar datos históricos y actuales de ocurrencia de la especie en la ecorregión de la Sierra Madre Occidental y las Islas del Cielo. Se recopilaron registros de diversas colecciones y museos (nacionales y extranjeras), estudios históricos y actuales (artículos ci...
Chapter
Full-text available
Veracruz, junto con Chiapas y Oaxaca, es considerado uno de los estados con mayor riqueza de mamíferos del país. Sin embargo, poco más de la cuarta parte de todas las especies de mamíferos registrados en el estado está catalogada en alguna categoría de protección de la NOM-059-SEMARNAT-2001 (Semarnat, 2002). Los mamíferos silvestres que se distribu...
Article
Full-text available
The white-tailed deer (Odocoileus virginianus) is the most widely distributed and studied ungulate in the American continent. This species is found throughout Mexico, except on the peninsula of Baja California and some areas of northern Chihuahua and Sonora. In this study we compared three geographic distribution models (Kellogg 1956; Hall 1981; Vi...
Article
The importance of the characteristics of the diurnal bedsites used by male and female deer (Odocoileus virginianus texanus) in hot (> 40 degrees C), dry (< 400 mm rainfall per year) semiarid zones with xerophyllous brushland was analyzed. From December 1997 to October 1998, on six occasions, seven-km-long random transects were surveyed on horseback...
Article
Full-text available
Mearn's grasshopper mouse (Onychomys arenicola) in Mexico is found primarily in the central and northern states. This is the first report of the genus Onychomys in the state of Veracruz, based on 7 captured specimens (3 collected). This finding extends the species' known distribution by approximately 470 km east-southeast. In addition, this record...
Article
Full-text available
the concept of UMA (Units for conservation, management and sustainable use of wildlife) has become an innovate system for the wildlife management in Mexico and there are instances that show its viability. However, from the standpoint of wildlife conservation, the results of its operation are unconvincing. the statistics on species that are curren...
Article
Full-text available
One of the most important phases in wildlife management is the habitat assessment. The aim of this study was to define management strategies for the white-tailed deer, Odocoileus virginianus, from the evaluation of the habitat quality in an area of 5,329.82 km2 in the central region of Veracruz, Mexico. We generated a static model of habitat qualit...
Article
Full-text available
In February 2007, in the municipality of Santo Domingo Ingenio, Juchián District, Oaxaca state, we obtained the record of an individual of Baird's Tapir (Tapirus bairdii) from a photograph provided by the inhabitants of the site. The photograph was taken in 2005 during the rainy season, showing a dead adult tapir which was hunted at only 1.5 km nor...
Article
Full-text available
In February 2007, in the municipality of Santo Domingo Ingenio, Juchián District, Oaxaca state, we obtained the record of an individual of Baird's Tapir (Tapirus bairdii) from a photograph provided by the inhabitants of the site. The photograph was taken in 2005 during the rainy season, showing a dead adult tapir which was hunted at only 1.5 km nor...
Chapter
Full-text available
Management of microbasins as planning strategy for the development of rural communities in biosphere reserves: The case of "La Michilía", Durango, Mexico. Abstract: The administration of development units, as the basin, goes beyond the recovery of the environmental environment. Considering this unit as a basic element in administration, attention,...
Chapter
Full-text available
In Mexico four species of native deer exist: the white-tailed deer (Odocoileus virginianus), the mule deer (O. hemionus), the red brocket deer (Mazama temama) and the brown brocket deer (M. pandora). Unfortunately, the distribution areas of deer populations have diminished notably in the country as a whole, and some local populations have even beco...
Conference Paper
Full-text available
Comisión Federal de Electricidad(CFE) and the Instituto de Ecología A.C.(INECOL), evaluated the possible effects of building a change of regime dam on the Moctezuma River. Our objectives were to identify potential impacts, and quantify the magnitude of the disturbances they cause. The main impact of the project is associated with two events; the ri...
Article
Full-text available
Water is a crucial factor for wildlife in arid and semi-arid regions of Mexico and the United States. Management strategies include installation of artificial water sources. However, there is limited information on its effect on wildlife behavior. During a long-term study of white-tailed deer (Odocoileus virginianus) ecology in semi-arid northeaste...

Network

Cited By

Projects

Projects (7)
Project
El proyecto generará un conocimiento científico integral sobre las áreas verdes urbanas (AVU), con carácter social e integrador para el correcto diagnóstico de las relaciones entre la flora, fauna y sociedad en las AVU, bajo un contexto multidisciplinario. Por tanto, la investigación permitirá a los tomadores de decisiones desarrollar estrategias para mejorar la relación hombre naturaleza de manera armoniosa y consciente.
Project
El proyecto generará un conocimiento científico integral sobre las áreas verdes urbanas (AVU), con carácter social e integrador para el correcto diagnóstico de las relaciones entre la flora, fauna y sociedad en las AVU, bajo un contexto multidisciplinario. Por tanto, la investigación permitirá a los tomadores de decisiones desarrollar estrategias para mejorar la relación hombre naturaleza de manera armoniosa y consciente.
Project
The main objectives of this project are: 1) modeling the distribution and abundance of white-tailed deer and other ungulates at different spatial scales: country, biogeographic province, region, protected natural area (ANPs) and local site; and 2) modeling habitat quality or suitability using different approaches: habitat suitability index, precipitation patterns, niche centroid distance, and others.