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@proceedings{1082070,
author = {Francová, Kateřina and Ondračková, Markéta},
booktitle = {X. Czech and Slovak Parasitological Days, Brno, Programme and Abstracts, p. 23},
keywords = {parasite; fish; overwintering; mortality; condition; young-of-the-year},
language = {eng},
isbn = {978-80-210-5862-0},
title = {Effect of parasite infection on overwinter mortality in juvenile fish},
year = {2012}
}
TY - CONF
ID - 1082070
AU - Francová, Kateřina - Ondračková, Markéta
PY - 2012
TI - Effect of parasite infection on overwinter mortality in juvenile fish
SN - 9788021058620
KW - parasite
KW - fish
KW - overwintering
KW - mortality
KW - condition
KW - young-of-the-year
N2 - Body condition and parasite abundance was examined in early- and late-hatched European bitterling Rhodeus amarus during the first overwintering period in two seasons. Body condition in early-hatched fish did not change during winter, and increased significantly in March. From November to February, late-hatched fish showed a decreasing trend in condition. Despite a significant increase in March, however, late-hatched fish condition only reached the same level as before winter. Total parasite abundance increased significantly in winter in both fish size-classes, reflecting a seasonal increase in monogenean infection. Early-hatched fish were parasitized significantly more than late-hatched fish during winter, but only in late-hatched fish was a negative correlation between parasite infection and condition found and a significant decrease in parasite abundance recorded after wintering, indicating mortality of heavily infected individuals with low condition during the winter. A trend for higher overwinter mortality in late-hatched fish was found under semi-experimental conditions. The decrease in condition during the winter period in late-hatched fish corresponds with faster energy depletion generally expected in smaller individuals. Our results suggest that parasite infection may influence overwinter survival of 0+ R. amarus, with a stronger effect in smaller individuals.
ER -
FRANCOVÁ, Kateřina a Markéta ONDRAČKOVÁ. Effect of parasite infection on overwinter mortality in juvenile fish. In \textit{X. Czech and Slovak Parasitological Days, Brno, Programme and Abstracts, p. 23}. 2012. ISBN~978-80-210-5862-0.
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