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Volume 42 - Number 2 - 2007

Nematodes from Isla Mujeres and Banco Chinchorro reefs, Quintana Roo, Mexico

Alberto de Jesús-Navarrete1


1Departamento de Aprovechamiento y Manejo de Recursos Acuático. El Colegio de la Frontera Sur-Unidad Chetumal, A. P. 424 Chetumal, Quintana Roo, México, C. P. 77900


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In order to know the composition of free living marine nematodes, samples were collected in three sites at Isla Mujeres and four sites at Banco Chinchorro, Quintana Roo, Mexico. At Isla Mujeres, 34 genera were identified corresponding to 17 families and three orders. Chromadorida was the order best represented with 20 genera, followed by the order Monhysterida with eight genera and the order Enoplida with six genera. Family Desmodoridae had the highest number of genera (five). The most abundant genera (individuals 0.001m-2) were: Terchellingia longicaudata (34), Spirinia parasitifera (23), Croconema cincta (22), Eubostrichus porosum (20), and Xyala riemmani (18). Station E2 had the high nematode abundance (125 individuals 0.001m-2), whereas station E3 had the lowest amount (85 individuals 0.001m-2). At Banco Chinchorro, nematofauna corresponded to three orders, 17 families, and 49 genera. Chromadorida had the highest number of families and genera (9 and 34 respectively). Enoplida had five families and eight genera, whereas Monhysterida had three families and seven genera. Desmodoridae showed the highest number of genera (11). Croconema cincta, presented the highest abundance (36 individuals 0.001m-2) followed in descendent order by Dorylaimopsis sp. 1 (24), Croconema otti (22),Paracomesoma longispiculum and Trypilodes marinus with 20, respectively. CN had the highest abundance by station (243 individuals 0.001m-2), whereas CL had the lowest (37 individuals 0.001m-2). In both localities, dominant nematodes had small and annulated bodies with many somatic setae, typical of sandy environments. All species are new records for Mexico


Key words: Caribbean reefs, free living nematodes, meiofauna




1Laboratorio de Zooplancton, Instituto de Ciencias del Mar y Limnología,Universidad Nacional Autónoma de México. A. P. 70-305, 04510 México, D. F. México
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