%0 Journal Article
%A Gardon, Tony
%A Reisser, Céline
%A Soyez, Claude
%A Quillien, Virgile
%A Le Moullac, Gilles
%D 2018
%T Microplastics
Affect Energy Balance and Gametogenesis
in the Pearl Oyster Pinctada margaritifera
%U https://acs.figshare.com/articles/journal_contribution/Microplastics_Affect_Energy_Balance_and_Gametogenesis_in_the_Pearl_Oyster_i_Pinctada_margaritifera_i_/6137363
%R 10.1021/acs.est.8b00168.s001
%2 https://acs.figshare.com/ndownloader/files/11070512
%K 10 μ m
%K impact
%K micro-PS
%K energy balance
%K SFG
%K germ cells phagocytosis
%K MP
%K Pearl Oyster Pinctada margaritifera
%K Microplastic
%K reproduction
%K assimilation efficiency
%K concentration
%X Plastic
pollution in the environment is increasing at global scale.
Microplastics (MP) are derived from degradation of larger plastic
items or directly produced in microparticles form (< 5 mm). Plastics,
widely used in structures and equipment of pearl farming, are a source
of pollution to the detriment of the lagoon ecosystem. To evaluate
the impact of MP on the physiology of Pinctada margaritifera, a species of ecological and commercial interests, adult oysters
were exposed to polystyrene microbeads (micro-PS of 6 and 10 μm)
for 2 months. Three concentrations, 0.25, 2.5, and 25 μg L–1, and a control were tested. Ingestion and respiration
rate and assimilation efficiency were monitored on a metabolic measurement
system to determine the individual energy balance (Scope For Growth,
SFG). Effects on reproduction were also assessed. The assimilation
efficiency decreased significantly according to micro-PS concentration.
The SFG was significantly impacted by a dose-dependent decrease from
0.25 μg L–1 (p < 0.0001),
and a negative SFG was measured in oysters exposed to 25 μg
L–1. Gonads may have provided the missing energy
to maintain animals’ metabolism through the production of metabolites
derived from germ cells phagocytosis. This study shows that micro-PS
significantly impact the assimilation efficiency and more broadly
the energy balance of P. margaritifera, with negative
repercussions on reproduction.
%I ACS Publications