Velázquez-Ornelas, K.E. (2019). Taxonomía, distribución y aspectos ecológicos de los copépodos (Crustacea: Copepoda) de charcas temporales del estado de Jalisco. [Taxonomy, distribution and ecological aspects of the copepods (Crustacea: Copepoda) from temporary ponds in the state of Jalisco.]. Tesis de Maestría, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan, Jalisco, Mexico. 216 pp. [In Spanish; English abstract].

508824

Velázquez-Ornelas, K.E.

2019

216 pp. [In Spanish; English abstract]

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Copepods constitute the greatest food source for secondary consumers and the greatest phytoplankton consumers in aquatic environments. In Jalisco there is few information about the group, due to the difficulty that their manipulation represents (size from 0.25 to 3 mm) and the reduced number of specialists in the country. Previously, only six species of freshwater copepods have been reported for Jalisco, even with the great territorial extension of the state (˜ 80,000 km2 ) and the high number and variety of aquatic environments. In this work, we analyzed the composition and taxonomy of copepods from temporary ponds, as its biogeographical and environmental affinity. We divided the study area in five zones, based in the physiography, and between four and 10 water bodies were sampled in each zone. Three horizontal tows were made in each site with 0.05 mm mesh size plankton nets. 22 species were determined: seven belong to the order Calanoida and 15 to the Cyclopoida. The best represented genera were: Mastigodiaptomus, Mesocyclops, Microcyclops, (one of them, M. aspericornis, of Afro-Asiatic origin) and Thermocyclops. We identified two non-reported for the literature species: one of the genus Leptodiaptomus, characterized by (1) the presence of spinules over the dorsal margin of the anal somite and (2) a digitiform process over the inner margin of the first right exopodal segment of the fifth leg. The other species corresponds to the genus Metacyclops, different to M. laticornis by (1) the length and l/w ratio of the caudal rami and (2) the length and number of the maxilliped setae. The species richness registered for each zone was: Guadalajara (15 species), Costa (11), Sierra (9), Altos (8) y Chapala (4). The environmental parameters allowed to identify the zones of study as spatial units, which justifies the use of physiographical sub provinces for the study of this group. The list of registered copepods in Jalisco raised up to 26 species if the additional records are considered, and it’s now comparable to states like Aguascalientes (˜ 35 species), Yucatán (˜ 37) or the Estado de Mexico (˜ 25). This work provides the taxonomical bases for future projects related with this biological group in Jalisco, besides of additional data of the distribution and environments of these species in Mexico.

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