Sergio Chazaro-Olvera | Universidad Nacional Autónoma de México (original) (raw)

Papers by Sergio Chazaro-Olvera

Biocyt biología, ciencia y tecnología, Jul 6, 2022

Biocyt biología, ciencia y tecnología, Sep 20, 2023

Biocyt biología, ciencia y tecnología, Sep 29, 2023

Revista Mexicana De Biodiversidad, May 24, 2023

Taxonomy and systematics Biodiversity and new records of benthic amphipods (Crustacea: Peracarida... more Taxonomy and systematics Biodiversity and new records of benthic amphipods (Crustacea: Peracarida: Amphipoda) from coral reef protected natural areas in the Mexican Caribbean Sea Biodiversidad y registros nuevos de los anfípodos bentónicos (Crustacea: Peracarida: Amphipoda) en áreas naturales protegidas de arrecifes de coral en el mar Caribe mexicano

Crustaceana, 2017

The population structure, growth and fecundity of the amphipod Nototropis minikoi in front of the... more The population structure, growth and fecundity of the amphipod Nototropis minikoi in front of the Campechen Lagoon, Quintana Roo, were analysed. A total of 1207 juveniles, 120 adult females and 211 adult males were collected. The relationship of the total length and head length was allometric. Using the Von Bertalanffy equation the maximum length was calculated to be 6.66 ± 0.55 mm, the growth rate was 0.67 ± 0.02, which is faster and higher than in other peracarids. There was a significant relationship between the size of ovigerous females and the number of eggs, with an average of 6 ± 3.27 eggs and total length of 5.21 ± 0.57 mm, similar to that found in other studies. The net reproduction rate was 4.98, generation time 124.49 days, maximum intrinsic growth rate of 0.0131 and a low survival (15%). This work represents the first study on the population structure of the amphipod N. minikoi.

Revista Internacional De Contaminacion Ambiental, Nov 14, 2022

Farmers have increased the production of food by using chemical substances such as diuron; howeve... more Farmers have increased the production of food by using chemical substances such as diuron; however, these components affect the water quality and the species found in these ecosystems. Macrobrachium acanthurus and M. olfersii postlarvae present in the estuary of Río Jamapa, Veracruz were collected to measure the LC50 and LD50 using the herbicide Karmex (diuron: (3-(3,4-dichlorophenyl)-1,1-dimethylurea [DCMU]). The captures of the prawns were made with light traps. Acute toxicity bioassays were carried out at 96 h to determine the mean lethal concentration (LC50). In the experimental design, a geometric series was used considering the control and five concentrations of the herbicide (1.75, 3.5, 6.99, 14, and 28 mg/L). The data analysis was carried out with the Probit method. A maximum LC50 of 10.233 mg/L and LD50 of 8.221 mg/L of Karmex were obtained for M. acanthurus and a maximum LC50 of 9.242 mg/L and LD50 of 7.504 mg/L of Karmex were obtained for M. olfersii. The average lethal concentration was consistent with those of other crustaceans, such as Artemia salina and Daphnia. Based on the response in the bioassays, Macrobrachium acanthurus and M. olfersii postlarvae can be used in toxicology studies. Palabras clave: estuario, Decapoda, camarones, diversidad, plaguicida. RESUMEN Los agricultores han aumentado la producción de alimentos mediante el uso de sustancias químicas como el Diurón; sin embargo, estos componentes afectan la calidad del agua y las especies que se encuentran en estos ecosistemas. Se recolectaron postlarvas de Macrobrachium acanthurus y M. olfersii presentes en el estuario del Río Jamapa, Veracruz para medir la CL50 y DL50 utilizando el herbicida Karmex (diuron: DCMU (3-(3,4-diclorofenil)-1,1-dimetilurea). Se realizaron las capturas de los langostinos S. Cházaro-Olvera et al. 562 con trampas de luz. Los bioensayos de toxicidad aguda se midieron a las 96 h para determinar la concentración letal media (CL50). En el diseño experimental se utilizó una serie geométrica considerando el testigo y cinco concentraciones del herbicida (1.75, 3.5, 6.99, 14 y 28 mg/L). El análisis de datos se realizó con el método Probit. Se obtuvo una CL50 máxima de 10.233 mg/L y una DL50 de 8.221 mg/L de Karmex para M. acanthurus y una CL50 máxima de 9.242 mg/L y DL50 de 7.504 mg/L de Karmex para M. olfersii. La concentración letal promedio fue consistente con la de otros crustáceos, como Artemia salina y Daphnia. Con base en la respuesta en los bioensayos, se pueden utilizar postlarvas de Macrobrachium acanthurus y M. olfersii en estudios de toxicología.

Revista Mexicana De Biodiversidad, Sep 1, 2017

Revista De Biologia Marina Y Oceanografia, Sep 28, 2022

In this study, the composition, distribution, and abundance of cumaceans collected in Isla Mujere... more In this study, the composition, distribution, and abundance of cumaceans collected in Isla Mujeres and Isla Contoy National Parks, Quintana Roo, Mexico, were evaluated. The specimens were collected with a scoop net (0.30 m wide by 0.48 m long and 330 µm mesh opening). The trawls were carried out on submerged vegetation in 10 m long transects parallel to the coastline. Additionally, at a station in Isla Mujeres, a white light trap with an intensity of 30 lm was used. The values of physicochemical parameters were measured in situ, which were within established by the official Mexican standard for uncontaminated waters; temperature (27.26 ± 0.64 °C); salinity (35.65 ± 0.21); dissolved oxygen (8.01 ± 0.88 mg L-1); total dissolved solids (22.82 ± 0.22 ppm); and pH (8.07 ± 0.15). Regarding the families Bodotriidae and Nannastacidae, a total of 7,590 specimens belonging to 5 genera and 18 species were identified. Cumella sp. "A" was the most abundant species with 5,364 specimens followed by Vaunthompsonia floridana with 1,391 specimens. Vaunthompsonia minor was recorded in 9 of the 11 sampling stations. The geographic distribution ranges of Cyclaspis mexicansis, Cumella achimae, C. bacescui, C. andri, C. caribbeana, C. croixensis, C. medeeae, and C. somersi were extended. The highest diversity and equitability occurred in Isla Mujeres (3.05 and 0.88 bits ind-1 , respectively). The genus Vaunthompsonia was dominant in Isla Mujeres, while the genus Cumella was dominant in Isla Contoy.

Hidrobiologica, Aug 30, 2021

Background. The southern zone of the estuary of the Jamapa River, Veracruz, is a place of transit... more Background. The southern zone of the estuary of the Jamapa River, Veracruz, is a place of transition between the river and the marine environment to which sediments, compounds, and species of crustaceans are transported to the neritic zone where is the Parque Nacional Sistema Arrecifal Veracruzano. Objective. The responses of exposure of Potimirim mexicana postlarvae to diuron, glyphosate, and paraquat, as well as the relative abundance, diversity of the association of crustaceans, and values of temperature, salinity, oxygen, pH, and dissolved solids in the estuary were evaluated. Methods. Sampling was carried out with white light traps in November and March. Living Potimirim mexicana postlarvae were obtained from the samples to carry out the bioassays; the remaining individuals of the association were fixed in 70% alcohol for identification and quantification. The environmental factors were measured using a multiparameter Hanna HI 9828. Results. Dissolved oxygen was of 6-7 mgL-1 , pH of 8-9, temperature of 26-27° C, total dissolved solids of 700-1,500 ppm and salinity of 0.70-16 ups. Environmental conditions permit the presence of Potimirim mexicana postlarvae. Six taxa were found: postlarvae of Macrobrachium acanthurus, M. olfersii and Potimirim mexicana, megalopae of Callinectes sapidus and Armases ricordi, and zoeae of Brachyura. Diversity ranged from 1.55 to 1.77 bits*individual-1 , indicating an intermediate stability of the estuary. A total of 12,827 postlarvae of P. mexicana were obtained. The LC 50 values of diuron, paraquat, and glyphosate were 5.94, 1.51, and 221.05 mgL-1 , respectively. Conclusions. The values found here are consistent with those obtained by other authors for different species of crustaceans. Due to the important ecological in the food web of P. mexicana, its postlarvae can be used as sensitive test organisms in ecotoxicological studies.

Novitates Caribaea, Oct 1, 2017

Los mísidos del Caribe mexicano permanecen poco estudiados hasta el presente. Este trabajo repres... more Los mísidos del Caribe mexicano permanecen poco estudiados hasta el presente. Este trabajo representa el primer registro de estos crustáceos para el Parque Nacional Arrecife Puerto Morelos, Quintana Roo, México. El material fue recolectado de macroalgas, esponjas y roca de coral, con ayuda de equipo SCUBA. Se documentan ocho especies de mísidos para dicho parque arrecifal. Las especies Heteromysis elegans, Brattegard, 1974; H. (Olivemysis) floridensis Brattegard, 1969 y H. (O.) siciliseta Brattegard, 1970, constituyen registros nuevos para el Caribe mexicano.

Zootaxa, Sep 15, 2011

A new species of Leptostraca, Nebalia villalobosi, is described from the Veracruz Coral Reef Syst... more A new species of Leptostraca, Nebalia villalobosi, is described from the Veracruz Coral Reef System, SW Gulf of Mexico. The new species was found associated with the sponge Ircinia fistularis (Demospongiae) from the Blanquilla reef at a depth of 12 m. It differs from the closely related species N. longicornis and N. lagartensis in the form of the eyes and rostrum, the number of articles in the antennular and antennal flagella, the inner border of article 3 on the mandible palp, the length of the exopod of maxilla 2, the rounded denticles on pleonite 6, the enlarged tip on pleopod 5, and the caudal furcae being slightly longer than the telson and pleonite 7 combined. This is the first record of a leptostracan associated with the sponge Ircinia fistularis.

Resumen. Se describe una especie nueva de anfípodo comensal del género Leucothoe (Leucothoidae) d... more Resumen. Se describe una especie nueva de anfípodo comensal del género Leucothoe (Leucothoidae) del Parque Nacional Sistema Arrecifal Veracruzano, Veracruz, SO del golfo de México. Los organismos fueron recolectados de la esponja Aplysina fi stularis a 10 m de profundidad. La especie nueva se compara morfológicamente con otras especies relacionadas. Coxa 2 con esquina anterior aguda; propodio del gantópodo 2 con 7 setas largas subapicales, 1 hilera de 27-28 setas gruesas mediales y 7 setas submarginales; artejo 2 del palpo mandibular con 5 setas y margen distal aserrado; último artejo del maxilípedo con uña distal y margen interno cubierto con espínulas pequeñas; telson triangular, trífi do distalmente, con 2 setas apicales y 2 pares de setas pectinadas medialmente, constituyen las características distintivas de Leucothoe hortapugai.

A new species of isopod crustacean belonging to the genus Paraimene (Flabellifera, Sphaeromatidae... more A new species of isopod crustacean belonging to the genus Paraimene (Flabellifera, Sphaeromatidae) is described. The new species was collected from Cojimar Bay, La Habana Province, Cuba. Paraimene danieli new species differs from all other known species of the genus by the following characters: pereonites 2-3 smooth, pereonites 5-6 carinate, pereonite 7 and pleonite 1 raised at middle point, lacinia mobilis with 3 cusps. An identification key to species of Paraimene is provided.

Acta Biológica Colombiana, 2020

Se efectuó un examen helmintológico a 14 especímenes de Eucinostomus melanopterus (mojarra bander... more Se efectuó un examen helmintológico a 14 especímenes de Eucinostomus melanopterus (mojarra bandera) y 19 Eugerres plumieri (mojarra rayada), de los cuales se recolectaron un total de 461 helmintos. Se identificaron 12 taxones (cinco a nivel de especie, cinco a género y dos a familia) como sigue: cuatro monogéneos, cinco digéneos (cuatro adultos, una metacercaria), un céstodo (plerocercoide) y dos nemátodos (larvas). La prevalencia más alta fue para Neodiplectanum mexicanum (29 %) en E. melanopterus y Aristocleidus hastatus (37 %) en E. plumieri. Ambos hospederos comparten el 50 % de los taxones de parásitos. Ninguno de los helmintos representa un riesgo zoonótico.

Journal of Natural History, Jan 17, 2022

Crustaceana, 2015

A new species of Cirolana Leach, 1818, collected from Cenote Aerolito, Cozumel Island, Mexican Ca... more A new species of Cirolana Leach, 1818, collected from Cenote Aerolito, Cozumel Island, Mexican Caribbean, is described. Cirolana (Anopsilana) adriani sp. nov. has a body 2.7× as long as wide, widest at pereonites 5-6; cephalon smooth, with small rostral point; pereonites without tubercles or ridges; antenna 2 not surpassing back of segment 2 of pereon; pleonite 4 lacking free ventrolateral margins; pleotelson as long as wide, smooth, with 9 distal robust setae; appendix masculina extremely long, 2× as long as endopod of pleopod 2. The main differences between the new species and the marine species Cirolana (Anopsilana) jonesi (Kensley, 1987) and C. (A.) sinu (Kensley & Schotte, 1994), as well as the stygobitic species C. (A.) yucatana Botosaneanu & Iliffe, 2000, the most similar known species of Cirolana (Anopsilana) in the region, are described. This is the second isopod of the genus Cirolana recorded from the karstic systems of the Yucatan Peninsula.

Ciencias biológicas: Vida y organismos vivos, Aug 12, 2022

Editora Direitos para esta edição cedidos à Atena Editora pelos autores. Open access publication ... more Editora Direitos para esta edição cedidos à Atena Editora pelos autores. Open access publication by Atena Editora Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0).

Hidrobiológica, 2021

Revista de biología marina y oceanografía, 2017

Análisis de la comunidad de peces de descarte en la pesca de arrastre de camarón (temporada de ll... more Análisis de la comunidad de peces de descarte en la pesca de arrastre de camarón (temporada de lluvias 2013) en la zona centro-sur del litoral veracruzano, México Fish discard by-catch shrimp trawl (rainy season 2013) in south central coast of Veracruz, Mexico