Abstract：
:Stable isotope and gut content analyses, in conjunction with backcalculated length-at-age estimates of growth, were employed to examine the relationship between trophic ecology and growth rate of a successful invader, Rutilus rutilus, in eight lakes in Ireland. The data revealed that R. rutilus was a trophic generalist in Irish lakes. It utilized a greater proportion of pelagic resources in mesotrophic lakes than in eutrophic lakes, potentially due to a greater density of benthic macroinvertebrates in eutrophic systems. The species was characterized by a large dietary and isotopic niche width and high temporal and spatial variations in diet. Growth rates were typical of those found in the native range of the species and were unrelated to either lake productivity or fish's diet. A generalist trophic ecology confers significant advantages on an invasive species, allowing it to exploit a variety of novel resources and fluctuations in prey availability.
journal_name
J Fish Bioljournal_title
Journal of fish biologyauthors
Hayden B,Massa-Gallucci A,Harrod C,O'grady M,Caffrey J,Kelly-Quinn Mdoi
10.1111/jfb.12351subject
Has Abstractpub_date
2014-04-01 00:00:00pages
1099-116issue
4eissn
0022-1112issn
1095-8649journal_volume
84pub_type
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