Genetic and Morphological Characterization of Southwellina hispida Van Cleave, 1925 (Acanthocephala: Polymorphidae), a Parasite of Fish-Eating Birds
Por:
García-Varela M., Aznar F.J., Rodríguez R.P., de Leon, GPP
Publicada:
1 jul 2012
Resumen:
Southwellina hispida Van Cleave, 1925 (Polymorphidae) is an endoparasite of fish-eating birds; the taxon exhibits wide intraspecific variability along its distribution area in Mexico. Specimens of S. hispida were recovered from 12 definitive host species (herons, pelicans, cormorants, and anhingas), as well as from paratenic hosts (cichlid fishes), along the Gulf of Mexico and Pacific Ocean slopes comprising localities in both the Neartic and Neotropical regions of Mexico. There were no significant differences in trunk length and width of the 40 cystacanths recovered from the mesentery of paratenic hosts. However, a more-detailed principal component analysis of 28 relaxed, mature adult females of S. hispida revealed considerable morphological variation among specimens. Sequences of the mitochondrial coding gene cytochrome c oxidase (cox 1) were generated for 22 samples of S. hispida recovered from 12 localities. The genetic divergence estimated among samples was very low, ranging from
Filiaciones:
García-Varela M.:
Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, Mexico
Aznar F.J.:
Departamento de Biología Animal, Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universitat de Valencia, Burjasot, Valencia 46071, Spain
Rodríguez R.P.:
Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, Mexico
de Leon, GPP:
Univ Nacl Autonoma Mexico, Dept Zool, Inst Biol, Mexico City 04510, DF, Mexico
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