An invasive crayfish affects egg survival and the potential recovery of an endangered population of Arctic charr
Version of Record online: 24 AUG 2011
© 2011 Blackwell Publishing Ltd
Volume 56, Issue 12, pages 2543–2553, December 2011
How to Cite
SETZER, M., NORRGÅRD, J. R. and JONSSON, T. (2011), An invasive crayfish affects egg survival and the potential recovery of an endangered population of Arctic charr. Freshwater Biology, 56: 2543–2553. doi: 10.1111/j.1365-2427.2011.02679.x
- Issue online: 13 OCT 2011
- Version of Record online: 24 AUG 2011
- (Manuscript accepted 22 July 2011)
Figure S1. Map of Sweden, Lake Vättern and the study site Kärraviken (14°58′E, 58°45′N).
Figure S2. Mean percentage of eggs remaining (±95% confidence interval) after 9, 14 and 36 days in the four treatments A–D when the block with only 50 eggs initially has been omitted from the analysis. Error bars have been truncated at 100%, the maximum recovery rate. Lower caps letter above bars for 9 and 36 days group treatments that were not significantly different (P > 0.05) according to post-hoc tests (see Table S2).
Figure S3. The mean daily water temperature and the daily cumulative water temperature from 25 October to 29 November 2009.
Table S1. Two-way anova for effects of treatment and time on the eggs remaining in experimental cages (see Fig. 1) when the block with only 50 eggs initially has been omitted from the analysis. Data (proportion of eggs recovered) were Arcsine transformed before analysis.
Table S2. Results of post-hoc tests after an F-test, showing significant effect of treatment (A, B, C and D, see Fig. 1 for explanation) within each time group on the remaining eggs in experimental cages, when the block with only 50 eggs initially has been omitted from the analysis. Data (proportion of eggs recovered) were Arcsine transformed before analysis. For time groups 1 and 3 (9 and 36 days) the effect of treatment was significant (F = 13.76, P < 0.001, and F = 23.97, P < 0.0001 respectively). For time group 2 (14 days) the effect of treatment was not significant (F = 1.73, P = 0.2144).
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