Prevalence and effects of a parasitic trematode on the blue mussel, Mytilus edulis, in the Boston Harbor

The blue mussel, Mytilus edulis, is a keystone species in the North Atlantic that plays critical roles in nutrient cycling, water filtration, and habitat creation. Blue mussel populations have declined significantly throughout the North Atlantic due to various factors, including habitat loss, pollut...

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Veröffentlicht in:Experimental parasitology 2023-11, Vol.254, p.108624-108624, Article 108624
Hauptverfasser: Evensen, K. Garrett, Figueroa, Alexandra E., Goncalves, Alyssa M., Chan, Tiffany J., Vu, Emily B., Hounain, Isaac, Poynton, Helen C.
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container_issue
container_start_page 108624
container_title Experimental parasitology
container_volume 254
creator Evensen, K. Garrett
Figueroa, Alexandra E.
Goncalves, Alyssa M.
Chan, Tiffany J.
Vu, Emily B.
Hounain, Isaac
Poynton, Helen C.
description The blue mussel, Mytilus edulis, is a keystone species in the North Atlantic that plays critical roles in nutrient cycling, water filtration, and habitat creation. Blue mussel populations have declined significantly throughout the North Atlantic due to various factors, including habitat loss, pollution, increasing water temperature, and parasites. One parasite is Proctoeces maculatus, a digenetic trematode, which uses M. edulis as an intermediate host. This parasite causes reduced growth, castration, and death in mussels. The range of P. maculatus has expanded northward from Cape Cod, MA to Maine which may be associated with rising temperatures in the Gulf of Maine. To evaluate the negative impacts of P. maculatus on mussels, we analyzed its infections in M. edulis throughout the Boston Harbor, MA. P. maculatus was present in every population and time point analyzed, with approximately 50% of mussels in the harbor infected. The parasite reduced gonadal development in infected mussels, which could lead to decreased fecundity. Severe P. maculatus infections induced a stress response, indicated by increased HSP70 expression. We developed a non-destructive hemolymph-based assay to determine if mussels are infected with P. maculatus, thus speeding up the evaluation process and eliminating the need to sacrifice individuals. With P. maculatus’ continued expansion northward, more mussel populations will be under threat from this parasite. [Display omitted] •Development of non-destructive hemolymph-based assay to detect trematode infections.•Parasitic trematode disrupts blue mussel gonadal development.•Severe infections induce heat shock protein stress response.
doi_str_mv 10.1016/j.exppara.2023.108624
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subjects Blue mussel decline
Gonadal development
Heat shock proteins
Hemolymph
Proctoeces maculatus
Trematode
title Prevalence and effects of a parasitic trematode on the blue mussel, Mytilus edulis, in the Boston Harbor
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