Helminth diversity of two anurans: Rhinella marina and Incilius valliceps (Anura: Bufonidae) from lagunas de Yalahau, Yucatán, Mexico
Juan F. Espínola-Novelo, Sergio Guillén-Hernández, Carlos F. González-Salas, Azucena Canto
Abstract
Helminth communities in amphibians in Mexico have received little attention. During 2005 and 2006, we collected a total of 52 individuals of the marine toad (Rhinella marina) and 54 of the southern Gulf Coast toad (Incilius valliceps) in the Lagunas de Yalahau (Yucatán, Mexico), in order to study their helminth communities. We produced rarefaction and extrapolation sample-size-based and coverage-based curves to provide asymptotic diversity estimators based on Hill numbers to compare the communities. We calculated the first 3 Hill numbers, which are associated with estimators of species richness and species dominance. In general, all results showed that the sample size was large enough to register most of the species of parasites present in both host toad species. We found more helminth species and a higher diversity in the R. marina community than that in I. valliceps. However, extrapolation analysis showed that when a sample size of 50 individuals is reached, there are no statistical differences between the helminth communities. Our results suggest that amphibian communities in this part of the tropics follow the same pattern as described for Nearctic latitudes, equally the terrestrial habitat of the hosts is an important factor in the structure of its helminth communities.
© 2017 Universidad Nacional Autónoma de México, Instituto de Biología. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords:
Parasite; Toads; Communities; Richness
Diversidad de helmintos de dos anuros: Rhinella marina e Incilius valliceps (Anura: Bufonidae)de las lagunas de Yalahau, Yucatán, México
Resumen
En México, las comunidades de helmintos en anfibios han recibido poca atención. Durante 2005 y 2006, un total de 52 individuos del sapomarino (Rhinella marina) y 54 del sapo de la costa del golfo (Incilius valliceps) fueron recolectados en las lagunas de Yalahau (Yucatán, México)para estudiar dichas comunidades. Para comparar entre sus comunidades, se produjeron curvas de rarefacción y extrapolación basadas en el tama˜node la muestra y se estimó la diversidad usando los números de Hill. Se calcularon los 3 primeros números que se asocian a los estimadores deriqueza y dominancia de especies y se construyeron las curvas de rarefacción y extrapolación respectivas. Los resultados mostraron que con eltama˜no de la muestra obtenido se registró la mayor parte de las especies de parásitos en ambos hospederos. Una mayor diversidad de helmintosy número de especies se registraron en R. marina frente a I. valliceps. Sin embargo, la extrapolación mostró que al alcanzar los 50 individuos no hay diferencias estadísticas entre ambas comunidades. Las comunidades de estos anfibios en esta región del trópico se ajustan al patrón descritoen latitudes neárticas. Igualmente, el hábitat que ocupan es un factor importante en la estructuración de sus comunidades helmínticas.
© 2017 Universidad Nacional Autónoma de México, Instituto de Biología. Este es un artículo Open Access bajo la licencia CC BY-NC-ND
Palabras clave:
Parásitos; Sapos; Comunidades; Riqueza
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