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2 resultados encontrados para: AUTOR: Hernández Olascoaga, Arturo
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1.
- Artículo con arbitraje
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Parasitic nematodes in Snappers (Perciformes: Lutjanidae) from the Southern Gulf of Mexico and Mexican Caribbean
Hernández Olascoaga, Arturo (autor) ; González Solís, David (autor) ;
Contenido en: Journal of Parasitology Volumen 105, número 5 (October 2019), páginas 697-703 ISSN: 0022-3395
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Resumen en: Inglés |
Resumen en inglés

Snappers from the southern Gulf of Mexico (SGM) and Mexican Caribbean (CAR) were examined for parasitic nematodes to determine their richness, composition, and infection parameters (prevalence and mean intensity). From February 2016 to March 2018, 431 individuals of 8 snapper species were collected in 6 localities. In all, these fishes were parasitized by 2,275 individual nematodes belonging to 13 taxa: Terranova sp. was found in 7 of 8 host species and showed the highest prevalence (23%), while the rest had lower values (<10%). Lutjanus griseus (Linnaeus) harbored the highest species richness (10 species), followed by Lutjanus apodus (Walbaum) (8 species). Most localities were similar in terms of species richness but differed in the specific composition. Eight nematode taxa represent new host records for the family Lutjanidae (Gill), thus increasing to 22 the nematode taxa in the SGM and CAR. There is a potential risk to public health due to the presence of nematodes with zoonotic potential (as Anisakis sp.) and the habit in the region of eating raw fish (cebiche).


2.
- Artículo con arbitraje
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Resumen en: Español | Inglés |
Resumen en español

Antecedentes. En el manatí del Caribe (Trichechus manatus) se reporta baja diversidad de helmintos y la mayoría de los estudios se han realizado en la subespecie de Florida (T. m. latirostris ) en ambientes subtropicales, por lo que existe poca información para la subespecie Antillana (T. m. manatus). En México, al parecer existen dos unidades poblacionales de manatí Antillano. Objetivos. El objetivo de este estudio fue determinar la presencia y prevalencia de huevos de helmintos parásitos en heces de T. m. manatus del Golfo de México (GM) y la costa del Caribe Mexicano (CAR). Métodos. Se utilizaron muestras de heces de 31 manatíes, tanto de GM (n = 22) como del CAR (n = 9), de 2005 a 2008. Las heces se fijaron y preservaron en alcohol etílico al 70% hasta su análisis. Las técnicas utilizadas fueron de flotación y sedimentación. Los huevos de helmintos se identificaron apoyándose en literatura especializada y catálogos gráficos. Resultados. En el 61.2% de las heces analizadas se encontraron parásitos, todas las muestras de CAR contenían parásitos. Se registraron huevos de cinco especies de helmintos: tres digéneos (Chiorchis fabaceus, C. groschafti y Pulmonicola cochleotrema ) y dos nemátodos (Heterocheilus tunicatus y Ascarididae gen. sp.). Dos especies fueron exclusivas para GM, una para CAR y dos fueron comunes para ambas áreas. Conclusiones. La diversidad fue consistentemente baja en las muestras. Cuatro especies fueron comunes con Florida y las islas del Caribe y una es nuevo registro para este hospedero. Futuros estudios parasitológicos en cadáveres frescos confirmarán la existencia de helmintos adultos para los nuevos registros en este hospedero.

Resumen en inglés

Background. Low helminth diversity has been reported in West Indian manatees (Trichechus manatus ). Most studies were conducted on the Florida sub species T. m. latirostris in subtropical environments, therefore limited information is available for the tropical Antillean subspecies T. m. manatus. In Mexico, there are apparently two population units of T. m. manatus. Goals. The objective of this study was to survey the presence and prevalence of helminth parasite eggs in the feces of T. m. manatus from the Gulf of Mexico (GM) and Caribbean coasts (CAR) of Mexico. Methods. We used 31 fecal samples collected from GM (n = 22) and CAR (n = 9), from 2005 to 2008. Feces were fixed and preserved in 70% ethanol until analysis. Both floatation and sedimentation techniques were used. Helminth eggs were identified using specialized literature and graphic catalogs. Results. We found parasite eggs in 61.2% of feces; all samples from CAR had helminths. We documented eggs from five helminths: three digenetic (Chiorchis fabaceus, C. groschafti, and Pulmonicola cochleotrema) and two Nematoda (Heterocheilus tunicatus and Ascarididae gen. sp.). Two species were found exclusively from GM, one exclusively from CAR, and two species were common to both locales. Conclusions. Diversity was consistently low in the samples. Four of the species found are common to Florida and Caribbean islands and one is a new registry for this host. Future examination of manatee carcasses could confirm the presence of adult helminth species for new registries for this host.