Resumo

BOADA, Melida; BASHIRULLAH, Abul; ALIO, José  e  ORTIZ, Luis. The spatial distribution and community descriptors of ectoparasites in gills of bar jack, Caranx ruber (Bloch, 1793) from Santa Cruz, Sucre state, Venezuela. Saber [online]. 2015, vol.27, n.2, pp.242-252. ISSN 1315-0162.

The spatial distribution and community descriptors (prevalence, absolute density, relative density and infection index) of the ectoparasites in gills of the bar jack Caranx ruber Bloch, 1793 from Santa Cruz, Sucre state, Venezuela, were evaluated from May 2005 to April 2006. The Dispersion Index (DI), and Green Index (GI) of ecoparasites from 155 specimens of C. rubber is described. There were three monogeneans (Protomicrocotyle mirabilis, Allopyragraphorus incomparabilis, Pseudomazocraes s p.), t wo c opepods (Lernanthrophus kroyeri, Caligus spp.), and one isopod (Cymothoa oestrum). The monogenean parasites showed preference for gill arch I and Pseudomazocraes sp. preferred the right side of the fish. The monogeneans were considered common species while P. mirabilis was also considered a central species, and the copepods and isopod were considered as secondary species. The parasites showed a typical aggregate pattern of distribution (ID > 1; IG +). There was a significant correlation between the values of absolute density of P. mirabilis (rs = 0.778, p < 0.05) and Pseudomazocraes sp. (rs = 0.731, p <0.05) with the size of the host, C. ruber. The parasite communities showed seasonal fluctuation. The highest number of parasite species in a given host was related to the higher diversity of the local environment.

Palavras-chave : Microhabitat; marine fish; ectoparasite; Monogenea; Copepoda; Isopoda.

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