To estimate isotopic changes caused by trematode parasites within a host, we investigated changes in the carbon and nitrogen isotope ratios of the freshwater snail Lymnaea stagnalis infected by trematode larvae. We measured carbon and nitrogen stable isotopes within the foot, gonad, and hepatopancreas of both infected and uninfected snails. There was no significant difference in the δ13C and δ15N values of foot and gonad between infected and uninfected snails; thus, trematode parasite infections may not cause changes in snail diets. However, in the hepatopancreas, δ15N values were significantly higher in infected than in uninfected snails. The 15N enrichment in the hepatopancreas of infected snails is caused by the higher 15N ratio in parasite tissues. Using an isotope-mixing model, we roughly estimated that the parasites in the hepatopancreas represented from 0.8 to 3.4% of the total snail biomass, including the shell.
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February 2008
Research Article|
February 01 2008
Parasite-Induced Changes in Nitrogen Isotope Signatures of Host Tissues
Hideyuki Doi;
Hideyuki Doi
aGraduate School of Life Sciences, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan
bPresent address: School of Aquatic and Fishery Sciences, University of Washington, Box 355020, Seattle, Washington 98195
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Natalia I. Yurlova;
Natalia I. Yurlova
aGraduate School of Life Sciences, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan
cInstitute of Animal Systematics and Ecology of Animals Siberian Branch of Russian Academy Sciences, Frunze St., 11, Novosibirsk, 630091, Russia
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Svetlana N. Vodyanitskaya;
Svetlana N. Vodyanitskaya
aGraduate School of Life Sciences, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan
cInstitute of Animal Systematics and Ecology of Animals Siberian Branch of Russian Academy Sciences, Frunze St., 11, Novosibirsk, 630091, Russia
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Eisuke Kikuchi;
Eisuke Kikuchi
aGraduate School of Life Sciences, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan
dCenter for Northeast Asian Studies, Tohoku University, Kawauchi, Aoba-ku, Sendai 980-8576, Japan. hdoi@u.washington.edu
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Shuichi Shikano;
Shuichi Shikano
aGraduate School of Life Sciences, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan
dCenter for Northeast Asian Studies, Tohoku University, Kawauchi, Aoba-ku, Sendai 980-8576, Japan. hdoi@u.washington.edu
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Elena N. Yadrenkina;
Elena N. Yadrenkina
aGraduate School of Life Sciences, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan
cInstitute of Animal Systematics and Ecology of Animals Siberian Branch of Russian Academy Sciences, Frunze St., 11, Novosibirsk, 630091, Russia
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Elena I. Zuykova
Elena I. Zuykova
aGraduate School of Life Sciences, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan
cInstitute of Animal Systematics and Ecology of Animals Siberian Branch of Russian Academy Sciences, Frunze St., 11, Novosibirsk, 630091, Russia
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J Parasitol (2008) 94 (1): 292–295.
Citation
Hideyuki Doi, Natalia I. Yurlova, Svetlana N. Vodyanitskaya, Eisuke Kikuchi, Shuichi Shikano, Elena N. Yadrenkina, Elena I. Zuykova; Parasite-Induced Changes in Nitrogen Isotope Signatures of Host Tissues. J Parasitol 1 February 2008; 94 (1): 292–295. doi: https://doi.org/10.1645/GE-1228.1
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