Preprint Article Version 1 This version is not peer-reviewed

Polycyclic Aromatic Hydrocarbons (PAH) in Fingerlings of Clarias gariepinus (Burchell, 1822) to Petroleum

Version 1 : Received: 27 December 2017 / Approved: 2 January 2018 / Online: 2 January 2018 (09:56:53 CET)

How to cite: Ezike, C.O..; Echor , F.O. Polycyclic Aromatic Hydrocarbons (PAH) in Fingerlings of Clarias gariepinus (Burchell, 1822) to Petroleum. Preprints 2018, 2018010009 (doi: 10.20944/preprints201801.0009.v1). Ezike, C.O..; Echor , F.O. Polycyclic Aromatic Hydrocarbons (PAH) in Fingerlings of Clarias gariepinus (Burchell, 1822) to Petroleum. Preprints 2018, 2018010009 (doi: 10.20944/preprints201801.0009.v1).

Abstract

One hundred and twenty (120) fingerlings of Clarias gariepinus (mean weight: 0.96 ± 0.1g) were randomly exposed to 4 experimental treatments of petroleum, based on LC50 values (6.4mg/L of crude oil, 8.7mg/L of petrol, 8.0mg/L of kerosene and 7.8mg/L of diesel oil) and replicated thrice, to determine polycyclic aromatic hydrocarbons (PAH) in exposed fish for 96 h. There was no significant difference (P > 0.05) in total (PAHs) between crude oil (97.1 ng/uL) and diesel (97.2 ng/uL) exposed fish and also between petrol (53.2 ng/uL) and kerosene (49.6 ng/uL) exposed fish, but there was a significant difference (P < 0.05) in PAH levels of the crude oil/diesel exposed -groups of fish compared to petrol/kerosene exposed -groups of fish (97.1/97.2 and 53.2/49.6 ng/uL). Naphthalene correlated positively to benzo a anthracene (r=0.672, (P < 0.05), benzo b fluoranthene (r=0.681, P < 0.05) and chrysene (r=0.615, P < 0.05) but did not correlate to fluorene. Benzo a anthracene correlated positively to benzo a pyrene (r=0.578, P < 0.05), phenathrene (r=0.685, P < 0.05) but did not correlate to acenaphthene. Fluorene correlated positively to benzo a pyrene (r=0.695, P < 0.05) but did not correlate to chrysene. Chrysene correlated positively to dibenzo a,h, pyrene (r=0.658, P < 0.05) to phenathrene and benzo b fluoranthene (r=0.659, P< 0.05). Indeno 123 cd- pyrene and fluranthene however did not correlate to other PAHs except naphthanene, acenaphthene and acenaphthylene. The level of PAH in fish may translate to the toxicity effect since crude oil and diesel with lower LC50 (6.4 and 7.8 mg/L)   deposited greater PAH than kerosene and petrol with higher LC50 (8.7 and 8.0 mg/L) in fingerlings of C. gariepinus. High risk to cancer disorders may occur in exposed fish to petroleum with high incidence of fluorene , anthracene, pyrene and benz a anthracene which correlated positively to benzo a pyrene which provide some basis for predicting impact of oil spills on fingerling population.

Subject Areas

polycyclic aromatic hydrocarbons; petroleum; Clarias gariepinus

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