howgate (phowgate@rsc.co.uk)
Fri, 7 Jan 2000 22:59:52 -0000
Alejandra
You ask about biogenic hydrocarbons in fish. A wide range of hydrocarbons
are present in the aquatic environment from natural sources, that is
without any contribution from petroleum. The biogenic hydrocarbons are
predominately alkanes with high carbon numbers, typically more than 19.
They are derived from plant and insect waxes and enter the aquatic
environment directly from organisms, plant and animals, in the aquatic
environment, or by run off from terrestrial sources, or by deposition from
the atmosphere. The biogenic hydrocarbons are characterised by a
predominance of molecules with odd-numbered carbons, whereas petroleum
shows no preference for odd- or even-numbered carbons. Aromatic
hydrocarbons are poorly represented in biogenic hydrocarbons fractions. The
hydrocarbons in the aqueous phase are taken up by organisms and
bioaccumulate up the trophic chain, hence will be found in fish, though not
necessarily produced by the fish.
For a review of the subject start with: Nevenzel, J.C., (1989), Biogenic
hydrocarbons of marine organisms, in Marine biogenic lipids, fats and oils,
R.G. Ackman, ed., CRC Press, Boca Raton, pp 3-71.
Peter Howgate
----------
From: Depto. Sanidad Pesquera <depsani@chilesat.net>
To: seafood <seafood@ucdavis.edu>
Subject: contaminación de alimentos con hidrocarburos
Date: 05 January 2000 11:41
Estimados Colegas,
Estoy buscando información relativa a contaminación de peces con
hidrocarburos (petróleo). Para esto necesito saber que hidorcarburos son
producidos por los peces (biogénicos) y en que cantidad.
Agradeceré cualquier información
Atentamente
Alejandra Alvarez
Sernapesca
Chile
This archive was generated by hypermail 2.0b3 on Fri Jan 07 2000 - 15:01:22 PST