Polycyclic aromatic hydrocarbons in the cestode Oncomegas wageneri parasite of Mexican flounder Cyclopsetta chittendeni

Abstract

The concentrations of polycyclic aromatic hydrocarbon metabolites (PAHm) and their bioconcentration factors (BCF) were determined in the larval stages of the cestode Oncomegas wageneri, recovered from the intestine of the Mexican flounder Cyclopsetta chittendeni, in the southern Gulf of Mexico. The PAHm concentrations in O. wageneri were measured using fixed-wavelength fluorescence spectrometry and compared with PAHm concentrations in host bile. Oncomegas wageneri PAHm concentrations were markedly higher than those in host tissues. The highest BCF values were obtained for 1hydroxypyrene (OHP) and benzo(a)pyrene (BaP). Using a General Linear Model, a significant negative relationship was found between O. wageneri PAHm concentrations (as response variable) and the number of O. wageneri and oil well proximity. Low BCF values and PAHm concentrations in C. chittendeni correlated positively with O. wageneri PAHm concentrations. In contrast, high BCF values for PAHm concentrations in C. chittendeni had a negative association with O. wageneri PAHm concentrations. This study provides the first evidence of the presence of PAHm in intestinal larval cestodes of marine flatfishes, demonstrating levels of PAHm that were higher than levels in their hosts.

Larvae trypanorhynch (Cestoda) infecting the dusky flounder, Syacium papillosum (Paralichthyidae: Pleuronectiformes) in the continental shelf of the Yucatan Peninsula, Mexico

“…from the Gulf of Tonkin ( Mamaev, 1970 ), Dasyatis centroura from Massachusetts ( Toth et al ., 1992 ), Lutjanus aya , Ophidion sp. from the Gulf of Mexico ( Jensen 2009 ), Carcharhinus limbatus from Vera-cruz ( Méndez & Dorantes-González, 2017 ), Syacium gunteri from Southern the Gulf of Mexico ( Vidal-Martínez et al ., 2014 ; 2015 ; 2019 ), Hypanus guttatus from the southwestern Atlantic Ocean off Maceio, Brazil ( Schaeffner, 2018 ), Rhizoprionodon terraenovae , Hypanus americanus from the Gulf of Mexico ( Martínez-Aquino et al ., 2020 ), Cyclopsetta chittendeni from Southern the Gulf of Mexico ( Soler-Jiménez et al ., 2020 ).…”

A fish-parasite sentinel system in an assessment of the spatial distribution of polychlorinated biphenyls

“…Studies addressing the storage of organic compounds in fish cestodes are understudied [17][18][19] compared to the large number of data on the accumulation of various metals in the fish-tapeworm (host-parasite) system [14][15][16]32 .…”