Growth, Abundance, and Food Supply of White Sucker

Autor:	Yong Chen, Harold H. Harvey
Rok vydání:	1995
Předmět:	Catostomus education.field_of_study Ecology Population Fish fin Aquatic Science Biology White sucker Fish measurement biology.organism_classification Fishery Benthos Abundance (ecology) parasitic diseases Littoral zone education Ecology Evolution Behavior and Systematics
Zdroj:	Transactions of the American Fisheries Society. 124:262-271
ISSN:	1548-8659 0002-8487
DOI:	10.1577/1548-8659(1995)124<0262:gaafso>2.3.co;2
Popis:	Twenty-three populations of white suckers Catostomus commersoni from Ontario lakes were investigated to determine if growth was density-dependent and if the abundance of chironomid larvae in the lake littoral zone was an important factor influencing growth. White sucker population sizes were estimated with either the Petersen mark–recapture or the catch-per-unit-effort method. White sucker fork length at age was back-calculated from the first pectoral fin ray. Each lake was divided into three thermal zones based on the position of the thermocline, and the benthos was quantified from 60 core samples prorated over the three zones. Canonical correlation and redundancy analyses indicated that the abundance of benthos, especially chironomids in the littoral zone, was a good predictor of white sucker growth. Growth was not so important in explaining benthos abundance. Regression and correlation analyses indicated white suckers from lakes with more abundant chironomid larvae in littoral zones and low wh...
Databáze:	OpenAIRE
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