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Jesús Alvarado-Flores
Centro de Investigación Científica de Yucatán A.C., Unidad de Ciencias del Agua, Cancún CP 77524, Mexico

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Journal article
Published: 27 July 2021 in Applied Sciences
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The Mexican Caribbean is part of the Mesoamerican Barrier Reef System, considered the second largest reef system globally. This system, as well as inland aquatic ecosystems, are at risk of contamination due to the intensive use of sunscreen by the tourists who visit the Riviera Maya each year. At present, the regulation and management of sunscreens are inconsistent, with most policies and legislation focused on the protected marine areas with little current focus on inland aquatic ecosystems. An estimated 229.76 tons of sunscreen are used annually, with residues putting the health of the marine and freshwater aquatic ecosystems and residents at risk. Groundwater is used recreationally (e.g., tourists swimming in sinkholes or cenotes) and as household drinking water. To understand the environmental impacts of sunscreen use and the management implications, a mixed-methods study was carried out, combining survey and interview data on how tourists use sunscreen and their perceptions of discharge of sunscreens into the water, with analysis of regional, national and international policies and legislation. Our findings of touristic behaviors, gaps in current legislation, and the pollution implications of different sunscreen types provide useful information for future decision-making and the creation of stronger environmental regulations.

ACS Style

Diego Casas-Beltrán; Karelys Febles-Moreno; Emely Hernandez-Yac; Courtney Gallaher; Jesús Alvarado-Flores; Rosa Leal-Bautista; Melissa Lenczewski. Impact of Tourist Behavior on the Discharge of Sunscreen Contamination in Aquatic Parks, Sinkholes, and Beaches of the Mexican Caribbean. Applied Sciences 2021, 11, 6882 .

AMA Style

Diego Casas-Beltrán, Karelys Febles-Moreno, Emely Hernandez-Yac, Courtney Gallaher, Jesús Alvarado-Flores, Rosa Leal-Bautista, Melissa Lenczewski. Impact of Tourist Behavior on the Discharge of Sunscreen Contamination in Aquatic Parks, Sinkholes, and Beaches of the Mexican Caribbean. Applied Sciences. 2021; 11 (15):6882.

Chicago/Turabian Style

Diego Casas-Beltrán; Karelys Febles-Moreno; Emely Hernandez-Yac; Courtney Gallaher; Jesús Alvarado-Flores; Rosa Leal-Bautista; Melissa Lenczewski. 2021. "Impact of Tourist Behavior on the Discharge of Sunscreen Contamination in Aquatic Parks, Sinkholes, and Beaches of the Mexican Caribbean." Applied Sciences 11, no. 15: 6882.

Journal article
Published: 30 March 2021 in Annales de Limnologie - International Journal of Limnology
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The genus Lecane is highly diverse, there are 209 species, most of which inhabits tropical aquatic systems. In Quintana Roo 42 species have been reported, one of these is Lecane bulla described at the widest distribution throughout the Yucatan peninsula however; their morphotypes and demographic features are unknown. Therefore, the objective of this work was identify the presence of morphotypes L. bulla and their life history traits. We evaluated life history and morphometric data of females and asexual and sexual eggs from the populations were established from clonal strains, which remained in laboratory conditions for 6 months. They were kept in a bioclimatic chamber with photoperiod of 12 hours of light and 12 hours darkness, at a 25 ± 2 °C, and were feeding with the green algae Nannochloropsis oculata at 1 × 106 cell/ml. Thirty-four clonal strains from six locations were analyzed. Statistical analysis determined significant differences between morphometric measurements (p < 0.001) in the six localities as well as showed statistically significant differences in all demographic parameters. In conclusion, this study indicates the possible coexistence in the same geographical area of two different morphotypes of L. bulla, one is a small-sized distributed in the northwest of Quintana Roo and another large-sized in the southwest.

ACS Style

Jovana Lizeth Arroyo-Castro; Roberto Rico-Martínez; Jesús Alvarado-Flores. Study of morphotypes and life history of six clones of Lecane bulla (Gosse, 1851) from Quintana Roo, Mexico. Annales de Limnologie - International Journal of Limnology 2021, 57, 9 .

AMA Style

Jovana Lizeth Arroyo-Castro, Roberto Rico-Martínez, Jesús Alvarado-Flores. Study of morphotypes and life history of six clones of Lecane bulla (Gosse, 1851) from Quintana Roo, Mexico. Annales de Limnologie - International Journal of Limnology. 2021; 57 ():9.

Chicago/Turabian Style

Jovana Lizeth Arroyo-Castro; Roberto Rico-Martínez; Jesús Alvarado-Flores. 2021. "Study of morphotypes and life history of six clones of Lecane bulla (Gosse, 1851) from Quintana Roo, Mexico." Annales de Limnologie - International Journal of Limnology 57, no. : 9.

Environmental management and conservation
Published: 01 January 2021 in Sustainable Environment
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The spatial distribution of rotifers in the aquatic ecosystems of the Yucatán peninsula is unclear. The peninsula is a karstic platform with heavy anthropogenic activity that presently puts pressure on and increases the fragmentation of aquatic systems. As the distribution of rotifers is unknown in this region, this study was performed to model spatial distribution of rotifers. Based on the analysis of their absence and presence in aquatic systems, using data from specimens collected in the field and bibliographic information from 1997 to 2018, our goal was to provide protection agencies as well as local and regional users with information on the distribution of microorganisms in the aquatic systems. With this material, an 877-record database with was produced. The bioregion outlined is an area in which 45 genera and 140 species of been observed; the study area contains 47.85% of all the rotifer species reported in Mexico. The essential genera in this bioregion are Brachionus with nine species, Keratella with three and Lecane with 44. In these three genera, we observed two morphotypes of rotifers: a small type in the southern zone and a large type in the northern zone.

ACS Style

Jesús Alvarado-Flores; Jovana Lizeth Arroyo-Castro; Leonela Chavez-Flores; Ailem Guadalupe Marin-Chan. Spatial distribution overview of rotifers in the Yucatán peninsula, México. Sustainable Environment 2021, 7, 1 .

AMA Style

Jesús Alvarado-Flores, Jovana Lizeth Arroyo-Castro, Leonela Chavez-Flores, Ailem Guadalupe Marin-Chan. Spatial distribution overview of rotifers in the Yucatán peninsula, México. Sustainable Environment. 2021; 7 (1):1.

Chicago/Turabian Style

Jesús Alvarado-Flores; Jovana Lizeth Arroyo-Castro; Leonela Chavez-Flores; Ailem Guadalupe Marin-Chan. 2021. "Spatial distribution overview of rotifers in the Yucatán peninsula, México." Sustainable Environment 7, no. 1: 1.

Journal article
Published: 17 April 2020 in Sustainability
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Sunscreens have spread widely into aquatic systems over the last 18 years in Quintana Roo, Mexico. This contamination is caused by intensive use as a result of leisure activities, as sunbathers apply the substances intensively (up to 83.75% of tourists and locals). Moreover, 25% of the compounds are mainly released into the water through topical products washing off. On average, 300,000 tourists arrive every week in Quintana Roo, increasing the contamination. In addition, there are no recent studies on sunscreen toxicity and the hazards this represents for the native zooplankton of Quintana Roo. In order to assess their adverse effects, acute toxicity was assessed for nine sunscreens (five non-biodegradable and four biodegradable) in four zooplankton species (Brachionus cf ibericus, Cypridopsis vidua, Diaphanocypris meridana, and Macrothrix triserialis). In total, 21 LC50 values were obtained, which are the baseline values for estimating risk and for determining the expected maximum permissible concentration. Our data on toxicity to freshwater species compared to marine species indicate that freshwater species are more sensitive than marine species. In conclusion, biodegradable sunscreen posed a moderate risk, and non-biodegradable posed a high risk. Our outcomes suggested that the maximum permissible concentrations for the contamination of sunscreens were 8.00E-05 g/L for non-biodegradable and 1.60E-04 g/L for biodegradable sunscreens.

ACS Style

Miguel Hernández-Pedraza; José Adán Caballero-Vázquez; Jorge Carlos Peniche-Pérez; Ignacio Alejandro Pérez-Legaspi; Diego Armando Casas-Beltran; Jesús Alvarado-Flores. Toxicity and Hazards of Biodegradable and Non-Biodegradable Sunscreens to Aquatic Life of Quintana Roo, Mexico. Sustainability 2020, 12, 3270 .

AMA Style

Miguel Hernández-Pedraza, José Adán Caballero-Vázquez, Jorge Carlos Peniche-Pérez, Ignacio Alejandro Pérez-Legaspi, Diego Armando Casas-Beltran, Jesús Alvarado-Flores. Toxicity and Hazards of Biodegradable and Non-Biodegradable Sunscreens to Aquatic Life of Quintana Roo, Mexico. Sustainability. 2020; 12 (8):3270.

Chicago/Turabian Style

Miguel Hernández-Pedraza; José Adán Caballero-Vázquez; Jorge Carlos Peniche-Pérez; Ignacio Alejandro Pérez-Legaspi; Diego Armando Casas-Beltran; Jesús Alvarado-Flores. 2020. "Toxicity and Hazards of Biodegradable and Non-Biodegradable Sunscreens to Aquatic Life of Quintana Roo, Mexico." Sustainability 12, no. 8: 3270.

Journal article
Published: 20 February 2020 in Environments
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Tourist growth in Quintana Roo, Mexico has brought with it an increase of pollution by sunscreens to aquatic ecosystems, which represents an environmental risk because of the chemical components of sunscreens that can negatively affect human health and aquatic ecosystems. However, the magnitude of pollution in aquatic environments is unknown. Consequently, we sought to estimate the contamination by sunscreens based on usage and tourism statistics. Our estimate indicates that the water in Quintana Roo will receive nearly 4367.25 tons of chemicals from sunscreens used by residents and tourists over a period of 18 years (2007 to 2025). On average, each tourist stays in Quintana Roo for 3.45 days, and 89.9% of these visitors apply sunscreen, although only the 83.7% engage in water activities. Additionally, 30.4% of residents engage in water activities for an average of 1.5 days/year. We considered direct sunscreen contaminant contamination, which occurs from the application of sunscreen and subsequent water activities, as well as indirect contamination, which occurs when people wash their skin with drinking water that then enters the drainage system. Our analysis indicated that the greatest contribution of sunscreen to the karst aquifer of Quintana Roo, is direct. Chemicals dissolved in water are a danger to aquatic life and human health.

ACS Style

Diego Armando Casas-Beltran; Miguel Hernández-Pedraza; Jesús Alvarado-Flores. Estimation of the Discharge of Sunscreens in Aquatic Environments of the Mexican Caribbean. Environments 2020, 7, 15 .

AMA Style

Diego Armando Casas-Beltran, Miguel Hernández-Pedraza, Jesús Alvarado-Flores. Estimation of the Discharge of Sunscreens in Aquatic Environments of the Mexican Caribbean. Environments. 2020; 7 (2):15.

Chicago/Turabian Style

Diego Armando Casas-Beltran; Miguel Hernández-Pedraza; Jesús Alvarado-Flores. 2020. "Estimation of the Discharge of Sunscreens in Aquatic Environments of the Mexican Caribbean." Environments 7, no. 2: 15.

Journal article
Published: 06 November 2019 in Revista de Biología Tropical
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Cadmium is a toxic metal for zooplankton that produces deformations. Therefore, we used two native zooplankton species from Quintana Roo, Mexico, to obtain data regarding cadmium toxicity including the threshold concentration for observable morphological alterations and the percentage of organisms with morphological alterations at the exposure concentrations. We used the rotifer Rotaria sp. and the oligochaeta Aeolosoma hemprichi, both fed with the alga Nannochloropsis oculata. Then, Rotaria sp. and A. hemprichi were exposed to a cadmium concentration range from 0.05 to 10.0 mg L-1. The LC50 for cadmium in Rotaria sp. was 0.7 mg L-1, whereas in A. hemprichi it was 3.38 mg L-1. Cadmium at 0.5 mg L-1 for ≤24 h induced morphological alterations in the lorica of rotifers, foot deformations, and constriction in the middle part of the body. In oligochaetes, damage to the epidermis was noted. The threshold concentration where deformations appeared in rotifer was 0.3 mg L-1 at 24 h and in oligochaeta was 0.5 mg L-1 at 30 min.

ACS Style

Daniela Pérez-Yañez; Danika Ruth Soriano-Martinez; Mendy Eded Damian-Ku; Eduardo Cejudo-Espinosa; Jesús Alvarado-Flores. Cadmium and morphological alterations in the rotifer Philodina cf. roseola (Bdelloidea: Philodinidae) and the worm Aeolosoma hemprichi (Annelida: Aeolosomatidae). Revista de Biología Tropical 2019, 67, 1 .

AMA Style

Daniela Pérez-Yañez, Danika Ruth Soriano-Martinez, Mendy Eded Damian-Ku, Eduardo Cejudo-Espinosa, Jesús Alvarado-Flores. Cadmium and morphological alterations in the rotifer Philodina cf. roseola (Bdelloidea: Philodinidae) and the worm Aeolosoma hemprichi (Annelida: Aeolosomatidae). Revista de Biología Tropical. 2019; 67 (6):1.

Chicago/Turabian Style

Daniela Pérez-Yañez; Danika Ruth Soriano-Martinez; Mendy Eded Damian-Ku; Eduardo Cejudo-Espinosa; Jesús Alvarado-Flores. 2019. "Cadmium and morphological alterations in the rotifer Philodina cf. roseola (Bdelloidea: Philodinidae) and the worm Aeolosoma hemprichi (Annelida: Aeolosomatidae)." Revista de Biología Tropical 67, no. 6: 1.

Journal article
Published: 10 September 2019 in Latin American Journal of Aquatic Research
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Microanalysis of elemental composition using dispersive energy X-ray is a biomonitoring tool to identify hazard metals. Using scanning electron microscopy/energy dispersive X-ray spectrometry, we studied the bioaccumulation of toxic metals in the lorica of diatoms, dinoflagellates, rotifers, cladocerans, copepods and fish scales in the aquatic ecosystems of northeastern Quintana Roo, Mexico. The study was carried out in the coastal zone, where samples were collected in 16 exposed bodies of water, including dolines, mangroves and lagoons. Microanalysis of the most abundant organisms revealed evidence of the presence of essential trace elements and metals (Ag, Al, Br, Cd, Cu, Fe, Hg, Pb and Zn) in the lorica and scales. Furthermore, interpolation maps of the northeastern zone of Quintana Roo were produced to pinpoint critical pollution zones of Cd, Hg and Pb, elements that are deemed toxic to the health of humans and aquatic ecosystems. In conclusion, elemental microanalysis of species native to the Mexican state of Quintana Roo using X-ray is a powerful tool for aquatic and toxicological biomonitoring of hazardous metals. The microanalysis of elemental composition by means of energy dispersive X-ray is a biomonitoring tool to identify inorganic pollutants, owing to this the present report studies the lorica of diatoms, dinoflagellates, rotifers, cladocerans, copepods and fish scales by means of scanning electron microscopy/energy dispersive X-ray spectrometry in view of finding out which toxic metals are bio-accumulating in the aquatic ecosystems of northeastern Quintana Roo, Mexico. The study was carried in the coastal zone, where samples were collected in 16 exposed water bodies: dolines, mangroves and lagoons from 2014 to 2016. Later on, the microanalysis was undertaken for the most abundant organisms. Our results for lorica and scales evince the presence of essential trace elements and toxic metals: Ag, Al, Br, Cd, Cu, Fe, Hg, Pb and Zn. Furthermore, interpolation maps of the northeastern zone of Quintana Roo were produced for Cd, Cu, Hg, and Pb, in which critical pollution zones with Cd, Hg and Pb are pinpointed; such elements are deemed toxic for human and aquatic ecosystems’ health. As a conclusion, X-ray microanalysis in lorica and scales of species native to the State is a good indication of the presence of metals in water.

ACS Style

Jesus Alvarado; Silvia Andrade; Jose Caballero; Antonio Almazán-Becerril. X ray microanalysis of northeastern Quintana Roo aquatic biota, Mexico: evidence of hazard metals presence. Latin American Journal of Aquatic Research 2019, 47, 654 -664.

AMA Style

Jesus Alvarado, Silvia Andrade, Jose Caballero, Antonio Almazán-Becerril. X ray microanalysis of northeastern Quintana Roo aquatic biota, Mexico: evidence of hazard metals presence. Latin American Journal of Aquatic Research. 2019; 47 (4):654-664.

Chicago/Turabian Style

Jesus Alvarado; Silvia Andrade; Jose Caballero; Antonio Almazán-Becerril. 2019. "X ray microanalysis of northeastern Quintana Roo aquatic biota, Mexico: evidence of hazard metals presence." Latin American Journal of Aquatic Research 47, no. 4: 654-664.

Journal article
Published: 13 June 2019 in Biodiversity Data Journal
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The current study adds 23 new records to the previously described monogonot rotifers of Cozumel, increasing the number of reported species to 40; these species are grouped into two orders, 11 families and 18 genera. Littoral and limnetic samples from 17 aquatic systems were examined, including wet dolines, coastal lagoons, temporary pools and artificial systems (reservoirs). Of the 36 species found, the following organisms represent new findings for Cozumel: Anuraeopsis fissa, Brachionus angularis, B. rubens, B. plicatilissensu lato, Beuchampiella eudactylota, Euchlanis dilatata, Mytilina bisulcata, Colurella adriatica, Lepadella ovalis, L. rhomboides, Squatinella mutica, Lecane aculeata, L. climacois, L. crepida, L. cornuta, L. grandis, L. obtusa, L. pyriformis, Cephalodella forficula, Scaridium bostjani, Trichocerca pusilla, Polyarthra cf. dolichoptera, P. vulgaris, Dicranophorus epicharis and Testudinella patina. Additional information is reported for these species.

ACS Style

Jovana Lizeth Arroyo-Castro; Jesús Alvarado-Flores; Juan Carlos Uh-Moo; Coral Grisel Koh-Pasos. Monogonot rotifers species of the island Cozumel, Quintana Roo, México. Biodiversity Data Journal 2019, 7, e34719 .

AMA Style

Jovana Lizeth Arroyo-Castro, Jesús Alvarado-Flores, Juan Carlos Uh-Moo, Coral Grisel Koh-Pasos. Monogonot rotifers species of the island Cozumel, Quintana Roo, México. Biodiversity Data Journal. 2019; 7 ():e34719.

Chicago/Turabian Style

Jovana Lizeth Arroyo-Castro; Jesús Alvarado-Flores; Juan Carlos Uh-Moo; Coral Grisel Koh-Pasos. 2019. "Monogonot rotifers species of the island Cozumel, Quintana Roo, México." Biodiversity Data Journal 7, no. : e34719.

Journal article
Published: 13 May 2019 in Annales de Limnologie - International Journal of Limnology
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This study used freshwater rotifers to evaluate the effects of two endocrine disrupting compounds (EDCs), luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which can be considered emergent contaminants in urban and rural wastewater and are of ecotoxicological importance. LH stimulates the synthesis of testosterone, whereas FSH promotes the maturation of follicles and sperm in vertebrates and invertebrates. However, in rotifers, there are no reports of the effects of chronic exposure to these hormones when added to reconstituted culture medium, as a way to study potential adverse effects that might occur in the environment. Therefore, we studied the reproductive effects of the rotifer Brachionus calyciflorus Pallas 1766 using a 4-day reproductive assay. Our results indicate that LH has a significant effect in increasing the production of females, males, and cysts, while FSH had no significant effect compared to control treatment. Additionally, our results indicate that LH exposure resulted in 0.33% of organisms being deformed, whereas FSH exposure resulted in 1.09% of organisms being deformed. Deformations included: (a) abnormal growth of lorica, (b) joined foot-head, (c) deformed anterior spine, and (d) deformed parthenogenetic eggs. The organisms with LH-induced deformations did not reproduce and only lived 48 h after 4 days of exposure, while those with FSH-induced deformities survived 15 days and produced 105 cysts with a hatching percentage of 58.10%. Our goal was to contribute to the knowledge of endocrine systems and endocrine hormones of rotifers, to explain the potential mechanism of endocrine disruption that results in adverse effects in freshwater rotifers.

ACS Style

Jesús Alvarado-Flores; Roberto Rico-Martínez. Effects of waterborne luteinizing hormone and follicle-stimulating hormone on reproduction of the rotifer Brachionus calyciflorus (Monogononta: Brachionidae). Annales de Limnologie - International Journal of Limnology 2019, 55, 10 .

AMA Style

Jesús Alvarado-Flores, Roberto Rico-Martínez. Effects of waterborne luteinizing hormone and follicle-stimulating hormone on reproduction of the rotifer Brachionus calyciflorus (Monogononta: Brachionidae). Annales de Limnologie - International Journal of Limnology. 2019; 55 ():10.

Chicago/Turabian Style

Jesús Alvarado-Flores; Roberto Rico-Martínez. 2019. "Effects of waterborne luteinizing hormone and follicle-stimulating hormone on reproduction of the rotifer Brachionus calyciflorus (Monogononta: Brachionidae)." Annales de Limnologie - International Journal of Limnology 55, no. : 10.

Journal article
Published: 01 January 2019 in Cogent Environmental Science
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ACS Style

Jesús Alvarado-Flores; Isidoro Rubio-Franchini; Alejandra Sofía Sánchez-Ávila; Gabriel De Jesús Ramírez-Tlalolín; Roberto Rico-Martínez. Arsenic toxicity, bioaccumulation and risk assessment: A case study in Tolimique Dam, Aguascalientes, Mexico. Cogent Environmental Science 2019, 5, 1 .

AMA Style

Jesús Alvarado-Flores, Isidoro Rubio-Franchini, Alejandra Sofía Sánchez-Ávila, Gabriel De Jesús Ramírez-Tlalolín, Roberto Rico-Martínez. Arsenic toxicity, bioaccumulation and risk assessment: A case study in Tolimique Dam, Aguascalientes, Mexico. Cogent Environmental Science. 2019; 5 (1):1.

Chicago/Turabian Style

Jesús Alvarado-Flores; Isidoro Rubio-Franchini; Alejandra Sofía Sánchez-Ávila; Gabriel De Jesús Ramírez-Tlalolín; Roberto Rico-Martínez. 2019. "Arsenic toxicity, bioaccumulation and risk assessment: A case study in Tolimique Dam, Aguascalientes, Mexico." Cogent Environmental Science 5, no. 1: 1.

Journal article
Published: 07 November 2017 in Polish Journal of Environmental Studies
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We studied the accumulation of lead as Pb(NO3)2 in the freshwater rotifer Lecane quadridentata using Leadmium Green and x-ray microanalysis by energy dispersion. The results indicate that lea(...)

ACS Style

Jesús Alvarado-Flores; Roberto Rico-Martínez. Bioconcentration of Lead and x-ray Microanalysis with SEM in the Freshwater Rotifer Lecane quadridentata (Rotifera: Monogononta). Polish Journal of Environmental Studies 2017, 26, 2869 -2872.

AMA Style

Jesús Alvarado-Flores, Roberto Rico-Martínez. Bioconcentration of Lead and x-ray Microanalysis with SEM in the Freshwater Rotifer Lecane quadridentata (Rotifera: Monogononta). Polish Journal of Environmental Studies. 2017; 26 (6):2869-2872.

Chicago/Turabian Style

Jesús Alvarado-Flores; Roberto Rico-Martínez. 2017. "Bioconcentration of Lead and x-ray Microanalysis with SEM in the Freshwater Rotifer Lecane quadridentata (Rotifera: Monogononta)." Polish Journal of Environmental Studies 26, no. 6: 2869-2872.

Book chapter
Published: 05 July 2017 in Chemical Warfare Toxicology
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Rotifera is a group of pseudocoelomate aquatic invertebrates with great potential as model organisms for ecotoxicology and genotoxicology. This potential is based on their: (a) fast growth and reproduction, (b) ease of culture and maintenance, (c) cyst production, (d) alternation of asexual and sexual generations, among others. While the use of rotifers as models for ecotoxicology is well documented and more species, tests, and information are added every day, the potential use of rotifers for genotoxicology is still very limited. In this chapter the authors attempt to explain the state of the art regarding the use of rotifers as models for both eco- and geno-toxicology. To achieve this, the authors have implemented a complete search in the mainstream scientific literature describing types of studies, perspectives, and use of rotifers in both areas. In the case of genotoxicology an emphasis has been made to incorporate suggestions on the advantages that rotifers represent if used as model organisms for the different techniques and studies instead of the most traditionally used organisms. Among the main topics included in genotoxicity are: (a) aging, (b) horizontal gene transfers and gene conversion induced by chronic exposure, (c) detoxification mechanisms, (d) transgenerational effects, and (e) micro evolution as mechanisms of adaptation to toxic exposure.

ACS Style

Roberto Rico-Martínez; Mario A. Arzate-Cárdenas; Jesús Alvarado-Flores; Ignacio A. Pérez-Legaspi; Gustavo E. Santos-Medrano. Chapter 3. Rotifers as Models for Ecotoxicology and Genotoxicology. Chemical Warfare Toxicology 2017, 48 -69.

AMA Style

Roberto Rico-Martínez, Mario A. Arzate-Cárdenas, Jesús Alvarado-Flores, Ignacio A. Pérez-Legaspi, Gustavo E. Santos-Medrano. Chapter 3. Rotifers as Models for Ecotoxicology and Genotoxicology. Chemical Warfare Toxicology. 2017; ():48-69.

Chicago/Turabian Style

Roberto Rico-Martínez; Mario A. Arzate-Cárdenas; Jesús Alvarado-Flores; Ignacio A. Pérez-Legaspi; Gustavo E. Santos-Medrano. 2017. "Chapter 3. Rotifers as Models for Ecotoxicology and Genotoxicology." Chemical Warfare Toxicology , no. : 48-69.

Articles
Published: 04 March 2017 in Marine and Freshwater Behaviour and Physiology
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We provide descriptions of the sexual reproductive biology of 12 species of rotifers from seven families and seven genera: Brachionus angularis, B. araceliae, B. ibericus, B. quadridentatus (Brachionidae); Cephalodella catellina (Notommatidae); Collotheca ornata (Collothecidae); Epiphanes brachionus (Epiphanidae), Filinia novaezealandiae (Trochosphaeridae); Lecane nana, L. leontina, L. bulla (Gosse 1851) (Lecanidae); and Trichocerca stylata (Trichocercidae). Data include: (a) video-recordings of 10 of the 12 species (the exceptions are two common species, B. angularis and B. ibericus), (b) scanning electron micrographs of B. araceliae, B. ibericus, C. catellina, and E. brachionus females, (c) light micrographs of C. catellina, C. ornata, F. novaezealandiae, L. bulla, L. leontina, L. nana, and T. stylata diapausing embryos, males, and unfertilized sexual eggs. This study challenges the common perception that mating behavior consists of five steps, and provides: (a) the first documentation of sexual cannibalism in C. catellina, (b) the first description of the sexual reproductive behaviors of C. ornata, L. bulla, L. leontina, L. nana, and T. stylata, (c) the first description of the males of F. novaezealandiae, L. leontina, L. nana, and T. stylata. Moreover, this study includes analyses of morphological and behavioral variation among males of the seven families studied.

ACS Style

Jesús Alvarado-Flores; Gerardo Guerrero-Jiménez; Marcelo Silva-Briano; Araceli Adabache-Ortíz; Joane Jessica Delgado-Saucedo; Daniela Pérez-Yañez; Ailem Guadalupe Marín-Chan; Mariana DeGante-Flores; Jovana Lizeth Arroyo-Castro; Azar Kordbacheh; Elizabeth J. Walsh; Roberto Rico-Martínez. Sexual reproductive biology of twelve species of rotifers in the genera: Brachionus, Cephalodella, Collotheca, Epiphanes, Filinia, Lecane, and Trichocerca. Marine and Freshwater Behaviour and Physiology 2017, 50, 141 -163.

AMA Style

Jesús Alvarado-Flores, Gerardo Guerrero-Jiménez, Marcelo Silva-Briano, Araceli Adabache-Ortíz, Joane Jessica Delgado-Saucedo, Daniela Pérez-Yañez, Ailem Guadalupe Marín-Chan, Mariana DeGante-Flores, Jovana Lizeth Arroyo-Castro, Azar Kordbacheh, Elizabeth J. Walsh, Roberto Rico-Martínez. Sexual reproductive biology of twelve species of rotifers in the genera: Brachionus, Cephalodella, Collotheca, Epiphanes, Filinia, Lecane, and Trichocerca. Marine and Freshwater Behaviour and Physiology. 2017; 50 (2):141-163.

Chicago/Turabian Style

Jesús Alvarado-Flores; Gerardo Guerrero-Jiménez; Marcelo Silva-Briano; Araceli Adabache-Ortíz; Joane Jessica Delgado-Saucedo; Daniela Pérez-Yañez; Ailem Guadalupe Marín-Chan; Mariana DeGante-Flores; Jovana Lizeth Arroyo-Castro; Azar Kordbacheh; Elizabeth J. Walsh; Roberto Rico-Martínez. 2017. "Sexual reproductive biology of twelve species of rotifers in the genera: Brachionus, Cephalodella, Collotheca, Epiphanes, Filinia, Lecane, and Trichocerca." Marine and Freshwater Behaviour and Physiology 50, no. 2: 141-163.

Journal article
Published: 01 September 2016 in Chemosphere
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Highlights•Bioaccumulation of Cr III and Cr VI and its adverse effects were studied in two rotifer species.•For Cr VI, 24-h LC50 ranged from 4.7 × 10−5 to 4 × 10−6 mg/L, whereas that for Cr III ranged from 0.64 to 1.279 mg/L.•Bioconcentration factors (BCFs) of Cr III rotifers are four orders of magnitude higher than those of Cr VI.•X-ray microanalysis showed that Cr is found in intoxicated rotifers, but not in control ones.•Harder lorica of Lecane quadridentata acts as a barrier and accumulator of Cr VI. AbstractBioaccumulation of trivalent (CrIII) and hexavalent chromium (CrVI), and its adverse effects were studied in two rotifer species: Brachionus calyciflorus (two different strains), and Lecane quadridentata. Median Lethal Concentration (LC50) at 24 h of both species showed that CrVI is highly toxic: LC50 ranges from 4.7 × 10−5 to 4 × 10−6 mg L−1), compared with CrIII: LC50 ranges from 0.64 to 1.279 mg L−1. Using the LC50 as an exposure concentration, and using atomic absorption, the bioconcentration factor (BCF) was obtained and BCFs of rotifers exposed to CrIII are four orders of magnitude lower than BCFs of rotifers exposed to CrVI. The effect of Cr on the elemental composition of the two species of rotifers in their structures by X-ray microanalysis by energy dispersion showed that Cr is found in intoxicated rotifers, but not in control rotifers. The basal immunoreactivity to metallothioneins is greater in B. calyciflorus than L. quadridentata. The immunoreactivity to metallothioneins decreases in B. calyciflorus when is exposed to CrIII, in contrast in L. quadridentata the immunoreactivity to metallothioneins increase when is exposed to CrIII, and the immunoreactivity to CrVI in L. quadridentata decrease. A mechanism is proposed in which the harder lorica of L. quadridentata acts as a barrier and accumulator of CrVI, and allows for attenuating responses like metallothionein production in L. quadridentata. Instead, in B. calyciflorus the lack of a harder lorica allows for deeper penetration of CrVI, and no time to produce attenuating measures.

ACS Style

Esmeralda Hernández-Ruiz; Jesús Alvarado-Flores; Isidoro Rubio-Franchini; Javier Ventura-Juárez; Roberto Rico-Martinez. Adverse effects and bioconcentration of chromium in two freshwater rotifer species. Chemosphere 2016, 158, 107 -115.

AMA Style

Esmeralda Hernández-Ruiz, Jesús Alvarado-Flores, Isidoro Rubio-Franchini, Javier Ventura-Juárez, Roberto Rico-Martinez. Adverse effects and bioconcentration of chromium in two freshwater rotifer species. Chemosphere. 2016; 158 ():107-115.

Chicago/Turabian Style

Esmeralda Hernández-Ruiz; Jesús Alvarado-Flores; Isidoro Rubio-Franchini; Javier Ventura-Juárez; Roberto Rico-Martinez. 2016. "Adverse effects and bioconcentration of chromium in two freshwater rotifer species." Chemosphere 158, no. : 107-115.

Journal article
Published: 01 March 2015 in Ecotoxicology
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Vinclozolin (VZ) is a dicarboximide fungicide widely used on fruits, vegetables and wines, effective against fungi plagues. In this study we characterized the effects of VZ using a 4-day reproductive chronic assay with the freshwater rotifer Brachionus calyciflorus. The assay included observations of several features of asexual and sexual reproduction. Our results indicate that VZ: (a) increased asexual and sexual reproduction, (b) caused severe abnormality in females and (c) these abnormalities were inherited by sexual and asexual reproduction. At 1.2 mg/L three abnormal females were found out of 457 total females (0.66 %). This low percentage is consistent and reproducible according to further analysis, where we increased the number of replicates and total females exposed to 1.2 mg/L of VZ, and found 18 abnormal females out of 2868 total females (0.63 % abnormality). Interestingly, abnormal females found at 5.6 mg/L VZ exposure, were able to show mating behavior. Our results suggest that VZ behaves as a strong endocrine disruptor whose effects show the characteristic inverted-U-shape exposure concentration response curve regarding the intrinsic population increase and the percentage of abnormalities as endpoints.

ACS Style

Jesús Alvarado-Flores; Roberto Rico-Martinez; Araceli Adabache-Ortiz; Marcelo Silva-Briano. Morphological alterations in the freshwater rotifer Brachionus calyciflorus Pallas 1766 (Rotifera: Monogononta) caused by vinclozolin chronic exposure. Ecotoxicology 2015, 24, 915 -925.

AMA Style

Jesús Alvarado-Flores, Roberto Rico-Martinez, Araceli Adabache-Ortiz, Marcelo Silva-Briano. Morphological alterations in the freshwater rotifer Brachionus calyciflorus Pallas 1766 (Rotifera: Monogononta) caused by vinclozolin chronic exposure. Ecotoxicology. 2015; 24 (4):915-925.

Chicago/Turabian Style

Jesús Alvarado-Flores; Roberto Rico-Martinez; Araceli Adabache-Ortiz; Marcelo Silva-Briano. 2015. "Morphological alterations in the freshwater rotifer Brachionus calyciflorus Pallas 1766 (Rotifera: Monogononta) caused by vinclozolin chronic exposure." Ecotoxicology 24, no. 4: 915-925.

Journal article
Published: 31 March 2012 in Aquatic Toxicology
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We studied how lead is bioconcentrated and distributed in the rotifer Brachionus calyciflorus using metal histochemistry to locate lead granules, Leadmium Green® analysis to establish the route of uptake, atomic absorption to determined the bioconcentration factor (BCF), and detected the presence of microelements in the cuticle by X-ray microanalysis with scanning electron microscopy. Our results indicate: (a) the digestive system is the main route of lead uptake in the rotifer B. calyciflorus, (b) after 24-h lead is deposited in granules in the mastax and vitellarium, (c) our energy-dispersive X-ray microanalysis indicates decalcification taking place in the cuticle of the rotifer after a 24-h lead exposure, and (d) we determined a BCF = 115 for lead after a 24 h exposure. However, the route of mobilization and storage of intracellular lead are still not fully understood in B. calyciflorus.

ACS Style

Jesús Alvarado-Flores; Roberto Rico-Martínez; Javier Ventura-Juárez; Marcelo Silva-Briano; Isidoro Rubio-Franchini. Bioconcentration and localization of lead in the freshwater rotifer Brachionus calyciflorus Pallas 1677 (Rotifera: Monogononta). Aquatic Toxicology 2012, 109, 127 -132.

AMA Style

Jesús Alvarado-Flores, Roberto Rico-Martínez, Javier Ventura-Juárez, Marcelo Silva-Briano, Isidoro Rubio-Franchini. Bioconcentration and localization of lead in the freshwater rotifer Brachionus calyciflorus Pallas 1677 (Rotifera: Monogononta). Aquatic Toxicology. 2012; 109 ():127-132.

Chicago/Turabian Style

Jesús Alvarado-Flores; Roberto Rico-Martínez; Javier Ventura-Juárez; Marcelo Silva-Briano; Isidoro Rubio-Franchini. 2012. "Bioconcentration and localization of lead in the freshwater rotifer Brachionus calyciflorus Pallas 1677 (Rotifera: Monogononta)." Aquatic Toxicology 109, no. : 127-132.

Book chapter
Published: 13 January 2012 in Herbicides - Properties, Synthesis and Control of Weeds
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ACS Style

Roberto Rico-Martinez; Juan Carlos; Ignacio Alejandro; Jesús Alvarado-Flores; Jose Luis. Adverse Effects of Herbicides on Freshwater Zooplankton. Herbicides - Properties, Synthesis and Control of Weeds 2012, 1 .

AMA Style

Roberto Rico-Martinez, Juan Carlos, Ignacio Alejandro, Jesús Alvarado-Flores, Jose Luis. Adverse Effects of Herbicides on Freshwater Zooplankton. Herbicides - Properties, Synthesis and Control of Weeds. 2012; ():1.

Chicago/Turabian Style

Roberto Rico-Martinez; Juan Carlos; Ignacio Alejandro; Jesús Alvarado-Flores; Jose Luis. 2012. "Adverse Effects of Herbicides on Freshwater Zooplankton." Herbicides - Properties, Synthesis and Control of Weeds , no. : 1.

Journal article
Published: 29 November 2008 in Revista de Biología Tropical
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The endocrine system controls and coordinates behavioral, biochemical, and physiological processes through signal mechanisms using neuropeptides or products of neurosecretory cells. Among invertebrates, this system is poorly studied in rotifers, in which estrogens and androgens significantly affect sexual reproduction. This is the first report of the presence of the Luteinizing Hormone (LH), Follicle-Stimulating Hormone (FSH), Thyroid Stimulating Hormone (TSH) and Prolactin (PRL) in rotifers. Analyses included the avidin-biotin-peroxidase complex method with primary antibodies LH (Anti-Rat LH serum for RIA), PRL (Anti-Rat PRL serum for RIA), FSH (Anti-Rat FSH serum for RIA) and TSH (Anti-Rat TSH serum for RIA). These hormones were found in females, males and parthenogenetic and sexual eggs of the freshwater Brachionus calyciflorus. The immunoreactivity of FSH, LH, TSH and PRL in females was observed in: ovaries, cerebrum, mastax, stomach, lorica, and the stomach gland. However, in males LH was observed only at the trochal disk and cerebrum. The hormones FSH, TSH and PRL, were observed in testicles, contractil vesicles, and cementary gland of males. Regarding amictic or parthenogenetic eggs, the hormones LH, FSH, TSH, and PRL were located mainly in the micromeres, and the staining in the macromeres was weak. On the other hand, in the mictic or sexual eggs the inner shell is stained for the hormones PRL and LH, opposite to the staining of FSH and TSH, located mainly in the embryo. In general, immuno-reactivity was observed in areas important for the reproductive, excretory, digestive and developmental processes.

ACS Style

Jesús Alvarado-Flores; María Del Rosario Montoya-Garcia; Javier Ventura Juárez; Roberto Rico-Martínez. Immunodetection of luteinizing hormone (LH), follicle-stimulating hormone (FSH), thyroid stimulating hormone (TSH) and prolactin (PRL) in Brachionus calyciflorus (Rotifera: Monogononta). Revista de Biología Tropical 2008, 57, 1 .

AMA Style

Jesús Alvarado-Flores, María Del Rosario Montoya-Garcia, Javier Ventura Juárez, Roberto Rico-Martínez. Immunodetection of luteinizing hormone (LH), follicle-stimulating hormone (FSH), thyroid stimulating hormone (TSH) and prolactin (PRL) in Brachionus calyciflorus (Rotifera: Monogononta). Revista de Biología Tropical. 2008; 57 (4):1.

Chicago/Turabian Style

Jesús Alvarado-Flores; María Del Rosario Montoya-Garcia; Javier Ventura Juárez; Roberto Rico-Martínez. 2008. "Immunodetection of luteinizing hormone (LH), follicle-stimulating hormone (FSH), thyroid stimulating hormone (TSH) and prolactin (PRL) in Brachionus calyciflorus (Rotifera: Monogononta)." Revista de Biología Tropical 57, no. 4: 1.