Preprint volume - SIBM

Pre-print Volume - Posters
Topic 2: MARINE ORGANISMS AND ECOSYSTEMS AS MODEL SYSTEMS
Fig. 1 - Survival at endtest and after 48h of S.
aurata embryos exposed to Cd.
Sopravvivenza fine test e 48h post fine
test degli embrioni di S. aurata esposti al
Cd.
Assessing survival 48h post-exposure period, pre-hatched embryos (24 h max aged)
showed LOEL at 0.06 ppm and an EC50 to concentrations more than 0.5 ppm (Fig. 1).
Post-hatched embryos (aged between 72h and 120h) showed higher sensitivity to the
reference toxicant; LOEL value was at 0.007 ppm, with an EC50 less than 0.05 ppm
(Fig. 2).
Conclusions – The lower sensitivity of pre-hatched embryos is probably due to the
presence of chorion. In relation to the large availability of Sparus aurata embryos, this
model can be proposed for a general tool in aquatic biosciences; post-hatched embryos
will be interesting model in ecotoxicological researches and related applications.
References
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41 st S.I.B.M. CONGRESS Rapallo (GE), 7-11 June 2010
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Fig. 2 - Survival at endtest and after 48h of S.
aurata eleutherioembryos exposed to Cd.
Sopravvivenza fine test e 48h post fine test
degli eleuterioembrioni di S. aurata esposti
al Cd.