Microplastic impacts physiological mechanisms of marine, diadromous, and freshwater crustaceans
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Comparative Biochemistry and Physiology, A
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The effects of microplastic on species inhabiting different saline gradients remain unclear, particularly the impact
of glitter particles. We investigated the effects of glitter on the physiological mechanisms of species from various
saline environments using the following models: a marine/estuarine shrimp (Penaeus vannamei), a diadromous
shrimp (Macrobrachium amazonicum), and an exclusively freshwater shrimp (Macrobrachium potiuna). The animals
were exposed to varying glitter concentrations (0, 0.4, 4 and 40 mg.L 1) for 10 days, and to the salinities
where they are found in nature. In addition, we evaluated the ability of one of the species (P. vannamei) to
recover its physiology and morphology when transferred to glitter-free water after previous exposure to the
pollutant for six days. We examined multiple mechanisms, including oxygen consumption, nitrogen excretion,
hepatosomatic index, energy substrate oxidation, and osmoregulation. P. vannamei showed 13 % mortality at
salinity 30. Physiological parameters exhibited specific variations in response to salinity and/or glitter concentration.
Glitter exposure affected oxygen consumption in all three species, but with contrasting responses:
P. vannamei exhibited increases up to ~200 % (depending on salinity), likely due to elevated energy demands,
while M. amazonicum and M. potiuna showed reductions up to 70 %, potentially indicating gill damage. In
M. amazonicum, glitter exposure enhanced the species’ hyperosmotic regulatory capacity. Penaeus vannamei
could not recover its hepatosomatic index and gill and intestinal morphologies after being transferred to glitterfree
water. We conclude that glitter significantly alters physiological functions related to energy metabolism and
osmoregulation. However, since these responses are salinity-dependent, the ability to migrate across different
salinity gradients may provide an adaptive advantage for species exhibiting such behavior. The results obtained
provide significant insights into the response of shrimps from different saline gradients to microplastics, which is
still a major gap in our knowledge.
Como referenciar
LEITE, HELLEN S.; COSTA, JULIANA R. da; CALBO, BARBARA B.; CAPPARELLI, MARIANA; NEVES, CLAUDIA; GIMILIANI, GIOVANNA T.; AUGUSTO, ALESSANDRA. Microplastic impacts physiological mechanisms of marine, diadromous, and freshwater crustaceans. Comparative Biochemistry and Physiology, A, v. 311, p. 1-11, 2026. DOI: 10.1016/j.cbpa.2025.111946. Disponível em: https://repositorio.ipen.br/handle/123456789/49855. Acesso em: 21 May 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.