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Adult blue crabs kill 97% of juveniles in Maryland’s Rhode River, with habitat loss threatening survival.
A 37-year study in Maryland’s Rhode River finds that cannibalism by adult blue crabs is the leading cause of death for juveniles, accounting for 97% of predation events, with no evidence of fish predation on tethered crabs.
Smaller juveniles in deeper waters faced up to 80% mortality, but survival improved significantly in shallow, vegetated zones under six inches deep, highlighting these areas as critical refuges.
The findings, which could reshape blue crab stock assessments, underscore the threat posed by shoreline development that destroys these vital habitats.
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Los cangrejos azules adultos matan al 97% de los juveniles en el río Rhode de Maryland, con la pérdida de hábitat amenazando la supervivencia.