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Table 3

Differences of δ13C means and δ15N means according to infection status in each sampling month. The comparisons include uninfected isopods, infected isopods (with Acanthocephalus spp. or the microsporidian isolate EFB02), and cystacanths of Acanthocephalus spp. Other microsporidians found in our study were not considered here due to low sample sizes. Values are reported in ‰.

Sampling Comparison Δδ13C Δδ15N
September 2023 Uninfected isopods – Acanthocephala-infected isopods −0.72 −1.90
Uninfected isopods – Microsporidium sp. EFB02-infected isopods −0.52 −0.84
Uninfected isopods – Acanthocephalus spp. cystacanths 0.59 −0.36
Acanthocephala-infected isopods – Microsporidium sp. EFB02-infected isopods 0.20 1.06
Acanthocephala-infected isopods – Acanthocephalus spp. cystacanths 1.31 1.54
Microsporidium sp. EFB02-infected isopods – Acanthocephalus spp. cystacanths 1.11 0.48
November 2023 Uninfected isopods – Acanthocephala-infected isopods 0.18 0.32
Uninfected isopods – Microsporidium sp. EFB02-infected isopods −0.19 −1.18
Uninfected isopods – Acanthocephalus spp. cystacanths 1.17 1.69
Acanthocephala-infected isopods – Microsporidium sp. EFB02-infected isopods −0.25 −1.55
Acanthocephala-infected isopods – Acanthocephalus spp. cystacanths 0.98 1.37
Microsporidium sp. EFB02-infected isopods – Acanthocephalus spp. cystacanths 1.36 2.88
December 2024 Uninfected isopods – Acanthocephala-infected isopods −0.12 −0.15
Uninfected isopods – Microsporidium sp. EFB02-infected isopods 0.34 −2.32
Uninfected isopods – Acanthocephalus spp. cystacanths 2.15 −0.87
Acanthocephala-infected isopods – Microsporidium sp. EFB02-infected isopods 0.46 −2.16
Acanthocephala-infected isopods – Acanthocephalus spp. cystacanths 2.27 −0.72
Microsporidium sp. EFB02-infected isopods – Acanthocephalus spp. cystacanths 1.81 1.45
January 2025 Uninfected isopods – Acanthocephala-infected isopods 0.26 −0.83
Uninfected isopods – Acanthocephalus spp. cystacanths 1.84 −2.56
Acanthocephala-infected isopods – Acanthocephalus spp. cystacanths 1.57 −1.73

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