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Empirical analysis of the influence of environmental variables associated with lake eutrophication on perch growth, consumption, and activity rates

Annales zoologici fennici, 1996-01, Vol.33 (3/4), p.507-515 [Peer Reviewed Journal]

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Title:
Empirical analysis of the influence of environmental variables associated with lake eutrophication on perch growth, consumption, and activity rates
Author: Boisclair, Daniel ; Rasmussen, Joseph B.
Subjects: Age structure ; Animal communities ; Aquatic communities ; Bioenergy ; Biomass ; Eutrophication ; Fish ; Freshwater fishes ; Interactions ; Invertebrates ; Limnology ; Percidae
Is Part Of: Annales zoologici fennici, 1996-01, Vol.33 (3/4), p.507-515
Description: We developed a series of relationships between components of fish bioenergetic model and environmental variables using data for twenty-six combinations of three age classes and eleven perch populations. Perch growth decreased as total fish numerical abundance increased. Growth, consumption, and activity rates decreased with the increase of the percent contribution of small prey to the invertebrate community. Furthermore, consumption and activity rates were negatively related to the biomass of the total invertebrate community but positively related to water transparency. Our analyses offer a more quantitative framework to the suggestion that perch growth and consumption rates may be negatively affected by eutrophication.
Publisher: Finnish Zoological and Botanical Publishing Board
Language: English
Identifier: ISSN: 0003-455X
EISSN: 1797-2450
Source: Freely Accessible Journals

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