Abstract
Feeding relationships between roach and ide from two sites in a mesotrophic lake SE Norway are presented and discussed. When animal food supply was scarce, both fish species increased their consumption of macrophytes; roach sevenfold, and ide threefold. Along a typical littoral vegetation gradient, ide fed among helophytes, while roach fed in the zone outside. This different habitat selection was reflected in the most important plants consumed (ide: Equisetum fluviatile, roach: Characeae), and confirmed by gill net catches. During the vegetative season, roach avoided areas with dense vegetation. In shallow areas beyond the littoral, the most important food plant for both fish species was Potamogeton perfoliatus, which constituted 80% of the total food consumed (dry weight basis) in the roach and 35% in the ide. The diet shift to plants seemed to be strongly influenced by the supply of animal food and the intensity of intra-and interspecific competition.
Full Text
Topics from this Paper
Animal Food Supply
Consumption Of Macrophytes
Gill Net Catches
Equisetum Fluviatile
Potamogeton Perfoliatus
+ Show 5 more
Create a personalized feed of these topics
Get StartedTalk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Similar Papers
Botanica Lithuanica
Dec 1, 2012
Jurnal Gizi dan Pangan
Nov 14, 2008
Ecology of Freshwater Fish
Mar 1, 1999
Northwest Science
May 1, 2017
Austral Ecology
Nov 6, 2007
Frontiers of Agricultural Science and Engineering
Jan 1, 2014
Ecology
Jan 1, 2004
The Journal of Wildlife Management
Jul 1, 1978
Canadian Journal of Botany
Jun 1, 1973
Knowledge & Management of Aquatic Ecosystems
Jan 1, 2020
Water
Jan 23, 2017
Journal of Food Composition and Analysis
Dec 1, 1987
British Food Journal
Sep 30, 2014
Estuarine, Coastal and Shelf Science
Sep 1, 2022
Limnologica
Jan 1, 2018
Oecologia
Oecologia
Nov 25, 2023
Oecologia
Nov 20, 2023
Oecologia
Nov 17, 2023
Oecologia
Nov 16, 2023
Oecologia
Nov 16, 2023
Oecologia
Nov 16, 2023
Oecologia
Nov 16, 2023
Oecologia
Nov 13, 2023
Oecologia
Nov 13, 2023
Oecologia
Nov 11, 2023