Name
Organic pollutants in deep-pelagic shrimp eggs: maternal transfer or direct environmental exposure?
Date & Time
Tuesday, May 5, 2026, 2:00 PM - 2:15 PM
Description

Observations over the past decade in the Gulf indicate severe population declines among deep-sea decapod crustaceans. As the Gulf functions as a sink for numerous natural and anthropogenic organic contaminants (e.g., petroleum seeps, oil spills, riverine inputs, and runoff), and because early life stages exhibit greater toxicological sensitivity to pollutants than adults, understanding exposure pathways during egg development is essential for assessing the resilience of deep-pelagic ecosystems. This study compares chemical data between adult female shrimps and their carried eggs (Families Acanthephyridae: Acanthephyra purpurea and A. stylorostrata, and Oplophoridae: Debaspis debilis) collected between 2011 and 2023, to elucidate the relative roles of maternal transfer and environmental exposure in driving the bioaccumulation of persistent organic pollutants (e.g., polycyclic aromatic hydrocarbons, phthalates) in deep-sea shrimp eggs. Preliminary results indicate higher concentrations of nearly all analyzed compounds in egg samples compared to muscle tissue samples from adults, suggesting a potential risk of increased mortality during early developmental stages. This pattern is particularly pronounced in S. debilis, which exhibited threefold higher PAH concentrations, and in the genus Acanthephyra, which showed twofold higher phthalate levels. Across all years and species studied, maternal transfer of organic pollutants to offspring was the predominant process, except for S. debilis in 2022–2023, where naphthalene compounds appeared to derive primarily from environmental exposure. Overall, the results indicate a shift in pollutant sources (from anthropogenic to natural for PAHs) and reveal multiple exposure mechanisms that may influence the abundance of deep-pelagic shrimps in the Gulf.

Location Name
106B
Is presenter a student?
No