Nelly Rodríguez‐Peña

Universidad Nacional Autónoma de México

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César M. Flores‐Ortiz

Universidad Nacional Autónoma de México

Jorge Ayala‐Berdón

Autonomous University of Tlaxcala

Kathryn E. Stoner

Stanford University

Jorge E. Schondube

Universidad Nacional Autónoma de México

Luis Barbo Hernández‐Portilla

Universidad Nacional Autónoma de México

Carlos Martı́nez del Rio

University of Wyoming

Margarita Martı́nez–Gómez

Autonomous University of Tlaxcala

Eliseo Cristiani‐Urbina

Instituto Politécnico Nacional

Fernando Abiram García-García

Universidad Nacional Autónoma de México

Liliana Morales-Barrera

Instituto Politécnico Nacional

Cooperative Institutions

Universidad Nacional Autónoma de México

Autonomous University of Tlaxcala

Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán

Instituto Politécnico Nacional

University of Wisconsin–Madison

Universidad Michoacana de San Nicolás de Hidalgo

Instituto de Ecología

Universidad Autónoma de la Ciudad de México

Universidad de Morelia

National University of San Luis

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Weather, ultrasonic, cranial and body traits predict insect diet hardness in a Central Mexican bat community

Mammal Research (2023)

Jorge Ayala‐Berdón Margarita Martı́nez–Gómez Andrés Ramírez‐Ponce René Beamonte‐Barrientos Jorge Martínez Vázquez

Abstract Insectivorous bats exhibit food preferences for specific attributes in their prey. Hardness has been defined as an important prey attribute, and in some cases a limiting factor in foraging decisions for smaller compared to larger bat species. The goal of this study was to identify which factors influence the selection of prey hardness in a vespertilionid bat community. We investigated food consumed by bats by analyzing fecal samples obtained from eight bat species coexisting in a mountain ecosystem of central Mexico and correlate non-phylogenetically and phylogenetically prey hardness to weather, bat´s body, cranial and ultrasonic call structure variables. Results showed that diet of vespertilionid bats was mainly represented by Diptera, Neuroptera, Lepidoptera and Coleoptera consumption. The qualitative prey hardness index (From soft 1 to hard 5) ranked bats as: Myotis melanorhinus , Corynorhinus mexicanus , Myotis volans , Myotis californicus (< 3); Myotis velifer (< 4); Eptesicus fuscus , Idionycteris phyllotis and Myotis thysanodes (> 4.2). Prey hardness was positively correlated to minimum and mean temperatures, bat´s body weight, total and forearm lengths, cranial variables as: zygomatic breadth, mandibular length, height of the coronoid process, lower molar width, C-M3 superior and inferior rows length and upper molar width; and negatively to ultrasonic variables as total slope, call duration, low and high frequencies, band width and frequency maximum power. Considering phylogenies, prey hardness positively correlated to mandibular length, C-M3 inferior and superior rows lengths ( p < 0.05). Our results showed that environmental, morphological and echolocation variables can be used as predictors of preferred insect prey in a community of vespertilionid bats.

Human echolocation

Insectivore

Eptesicus fuscus

10.1007/s13364-023-00678-2

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Citations (4)

The intake responses of three species of leaf-nosed Neotropical bats

Journal of Comparative Physiology B (2008)

Jorge Ayala‐Berdón Jorge E. Schondube Kathryn E. Stoner Nelly Rodríguez‐Peña Carlos Martı́nez del Rio

Artibeus

10.1007/s00360-007-0240-x

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Citations (32)

Nitrogen and amino acids in nectar modify food selection of nectarivorous bats

Journal of Animal Ecology (2013)

Nelly Rodríguez‐Peña Kathryn E. Stoner Jorge Ayala‐Berdón César M. Flores‐Ortiz Ángel Durán

Summary Chiropterophilic flowers secrete sugar nectar with low‐Nitrogen ( N hereafter) content and small amounts of amino acids, which may function to attract animals; nevertheless, the role that micronutrients have on the foraging decisions of Neotropical nectarivorous bats is unknown. We offered the nectar specialist L eptonycteris yerbabueanae and the omnivore G lossophaga soricina pairs of experimental diets mimicking either the N content or the relative abundance of 17 amino acids found in the floral nectar from the main plant species visited by these bats in a tropical dry forest. We addressed the following research questions: (i) Do bats select N ‐containing or sugar‐only nectar differently based on bats' N nutritional status? (ii) Does the presence of N in nectar affect the capacity of bats to discriminate and select other nectar traits such as sugar concentration? and (iii) Are bats able to distinguish among the flavours generated by the amino acid relative abundance present in the nectar from plants they typically encounter in nature? Our results showed that: (i) bats did not consider nectar N content regardless of their N nutritional condition, (ii) the nectar specialist L . yerbabuenae showed a preference for the most concentrated sugar‐only nectar but changed to be indifferent when nectar contained N , and (iii) L . yerbabuenae preferred diets without amino acids and preferred the taste of the amino acids present in the nectar of P achycereus pecten (Cactaceae) over those present in the nectar of C eiba aesculifolia (Bombacaceae). Our results suggest that regardless of the low concentrations at which N and amino acids are present in floral nectar, their presence affects bats' food selection by interfering with the bats' ability to detect differences in sugar concentrations, and by offering particular flavours that can be perceived and selected by nectarivorous bats. We discuss the ecological implications of the presence of N and amino acids in nectar on bats' foraging decisions.

Omnivore

10.1111/1365-2656.12069

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Citations (13)

Study of Bacillus cereus as an Effective Multi-Type A Trichothecene Inactivator

Microorganisms (2024)

Fernando Abiram García-García Eliseo Cristiani‐Urbina Liliana Morales-Barrera Nelly Rodríguez‐Peña Luis Barbo Hernández‐Portilla

Type A trichothecenes are common mycotoxins in stored cereal grains, where co-contamination is likely to occur. Seeking new microbiological options capable of inactivating more than one type A trichothecene, this study aimed to analyze facultative anaerobe bacteria isolated from broiler proventriculus. For this purpose, type A trichothecenes were produced in vitro, and a facultative anaerobic bacterial consortium was obtained from a broiler's proventriculus. Then, the most representative bacterial strains were purified, and trichothecene inactivating assays were performed. Finally, the isolate with the greatest capacity to remove all tested mycotoxins was selected for biosorption assays. The results showed that when the consortium was tested, neosolaniol (NEO) was the most degraded mycotoxin (64.55%;

Cereus

10.3390/microorganisms12112236

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Sugar gustatory thresholds and sugar selection in two species of Neotropical nectar-eating bats

Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology (2012)

Jorge Ayala‐Berdón Nelly Rodríguez‐Peña Cristian García Leal Kathryn E. Stoner Jorge E. Schondube

Sweetness

10.1016/j.cbpa.2012.10.019

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Citations (10)

Spectroscopic and Microestructural Evidence for T-2 Toxin Adsorption Mechanism by Natural Bentonite Modified with Organic Cations

Toxins (2023)

Fernando Abiram García-García Eliseo Cristiani‐Urbina Liliana Morales-Barrera Nelly Rodríguez‐Peña Luis Barbo Hernández‐Portilla

Aluminosilicates are adsorbents able to bind mycotoxins, and their chemical modification increases their affinity to adsorb low-polarity mycotoxins. To further investigate if the inclusion of salts in bentonite modifies its adsorptive capacity, we studied T-2 toxin adsorption in natural bentonite (NB) and when modified with quaternary ammonium salts differing in polarity and chain length: myristyl trimethyl ammonium bromide (B14), cetyl trimethyl ammonium bromide (B16) and benzyl dimethyl stearyl ammonium chloride (B18). The results showed that quaternary salts made bentonite: displace monovalent (Na+1, K+1) and divalent (Mg+2, Ca+2) ions; reduce its porosity; change its compaction and structure, becoming more crystalline and ordered; and modify the charge balance of sheets. T-2 adsorption was higher in all modified materials compared to NB (p ≤ 0.0001), and B16 (42.96%) better adsorbed T-2 compared to B18 (35.80%; p = 0.0066). B14 (38.40%) showed no differences compared to B16 and B18 (p > 0.05). We described the T-2 adsorption mechanism in B16, in which hydrogen bond interactions, Van der Waals forces and the replacement of the salt by T-2 were found. Our results showed that interaction types due to the inclusion in B16 might be more important than the hydrocarbon chain length to improve the adsorptive capacity of bentonite.

Bentonite

Ammonium bromide

10.3390/toxins15070470

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Citations (2)

Developmental Programming in Animal Models: Critical Evidence of Current Environmental Negative Changes

Reproductive Sciences (2022)

Victoria Ramírez Regina J. Bautista Oswaldo Frausto-González Nelly Rodríguez‐Peña Eduardo Tena Betancourt

10.1007/s43032-022-00999-8

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Citations (9)

“Variable Effects of Tourist Presence on the Activity Budget ofAlouatta pigra”

Tropical Conservation Science (2023)

Nelly Rodríguez‐Peña Marco Tulio Oropeza Sánchez Ana María González‐Di Pierro

Background and Research Wildlife tourism has been considered a useful tool for conservation in some contexts and found to cause diverse effects on biodiversity. We investigated the effect of the number of tourists on wild black howler monkeys’ ( Alouatta pigra) behavior at the Montes Azules Biosphere Reserve (MABR), in the Lacandona forest in Mexico. Methods We used 5-min focal animal sampling, during dry and rainy seasons. We recorded five common behaviors in three wild groups naturally exposed to different degrees of human disturbance (Station, River and Board) without tourists, 5 and 10 tourists. Results Five and 10 tourists increased locomoting and reduced socializing, however, differently affected activities’ allocation time in the monkeys’ groups: in Board, 10 tourists reduced monkeys feeding; ii) in River, 10 tourists reduced socializing; and iii) in Station, 5 tourists increased feeding and reduced socializing, and 10 tourists reduced socializing. Conclusions Watching tourism activities affect behavior differently in groups of Alouatta pigra in the Montes Azules Biosphere Reserve in in the Mexican state of Chiapas, emphasizing the importance of regulating tourism programs for the conservation of endangered species. Implications for Conservation Although longer-term studies controlling for additional variables are needed to provide a more comprehensive understanding of the impact of tourism on wild howler populations, the results from this study remain valuable as a baseline for understanding such effects and for proposing initial strategies to reduce tourism-induced disturbance.

10.1177/19400829231188622

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Citations (1)

El tratamiento con testosterona regula positivamente los niveles de proteína y ARNm de la enzima superóxido dismutasa dependiente de Mn en los islotes pancreáticos de ratas macho (Rattus norvegicus)

Deleted Journal (2023)

Tonantzin C. Sosa-Larios Angélica Morales-Miranda Martı́n Palomar-Morales Alberto Rojas‐Ochoa Nelly Rodríguez‐Peña

El aumento de la producción de especies reactivas de oxígeno daña a los islotes pancreáticos por estrés oxidativo y apoptosis en algunos modelos de diabetes en roedores. Se ha observado que la testosterona los protege contra este daño, sin embargo, no se conoce el mecanismo por el cual esta hormona ejerce su protección. El objetivo de este estudio fue evaluar el efecto de la administración de testosterona a ratas macho gonadectomizadas sobre la expresión de las enzimas antioxidantes, superóxido dismutasa dependiente de Mn (MnSOD) y catalasa. La expresión de las enzimas a nivel de la proteína, se estudió por inmunohistoquímica en ratas macho intactas, gonadectomizadas y gonadectomizadas tratadas con testosterona. La expresión del ARNm se analizó por retrotranscripción y reacción en cadena de la polimerasa en tiempo real, en islotes pancreáticos cultivados con testosterona, dihidrotestosterona (DHT) o vehículo. En el caso de la catalasa, el tratamiento con testosterona solamente aumentó la expresión del ARNm. La testosterona indujo la sobreexpresión de la proteína de MnSOD y del ARNm en los islotes pancreáticos a través de un mecanismo no relacionado con la aromatización androgénica, en el que muy probablemente intervienen los receptores de andrógenos, lo que demuestra la participación de la testosterona en la prevención de los daños causados por el estrés oxidativo en las células productoras de insulina.

10.22201/fesz.23958723e.2023.618

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Factors affecting nectar sugar composition in chiropterophilic plants

Revista Mexicana de Biodiversidad (2016)

Nelly Rodríguez‐Peña Kathryn E. Stoner César M. Flores‐Ortiz Jorge Ayala‐Berdón Miguel A. Munguía‐Rosas

Most pollinators prefer the sugars present in the nectar they consume, so it has been hypothesized that they have molded nectar trait evolution. However, nectar-feeding bats do not exhibit preferences for the sugars present in their diet. We analyzed the role that biochemical and ecological factors could play in shaping the nectar traits of chiropterophilic plants. We studied nectar traits and flower production in 49 plant species. We evaluated the relationship between nectar concentration and sugar composition using phylogenetically independent contrasts and if nectar traits were related to flower production using a Manova. We found that 42 species produced high hexoses nectars, and 7 species produced sucrose rich nectars. Phylogenetically independent contrasts showed that nectar concentration was negatively related to glucose content, positively related to fructose content, and was not related to sucrose content. A negative relationship was found from glucose and fructose contents to sucrose content, and glucose content was negatively related to fructose content. Finally, we did not found any relationship between nectar traits and the plants' flowering strategies. We conclude that bat physiology and the relative low evolutionary time of the interaction between plants and bats may determine the lack of pattern in the nectar characteristics of chiropterophilic plants.

10.1016/j.rmb.2016.03.002

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Citations (21)