2003
DOI: 10.1002/iroh.200310629
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Ecological Integrity Assessment of Lakes Using Fish Communities – Suggestions of New Metrics Developed in Two Austrian Prealpine Lakes

Abstract: An ecological assessment method for lakes based on fish communities similar to the IBI-system was developed and further tested on two Austrian prealpine lakes. Important quality criteria used were species composition, reproductive success, size structure and total fish biomass. The reference status of each lake was established by the reconstruction of the native fish community and the native total fish biomass.In Hallstättersee only minor deviations from the reference status could be observed. Additionally to … Show more

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Cited by 38 publications
(42 citation statements)
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“…Balanced populations are intermediate between the extremes of a large number of small fish and a small number of large fish and indicate that the rates of recruitment, growth and mortality may be satisfactory (Anderson and Wheithman, 1978); this situation is fairly similar to that of an unexploited population. Fish populations that display PSD values between 35 and 65 are generally considered to be balanced (Gabelhouse, 1984;Willis et al, 1993;Gassner et al, 2003;Volta, to appear). Values below 35 indicate a shortage of adults in the population, while values above 65 indicate an excess of adult specimens, a probably insufficient level of reproduction or excessive mortality among younger individuals.…”
Section: Discussionmentioning
confidence: 99%
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“…Balanced populations are intermediate between the extremes of a large number of small fish and a small number of large fish and indicate that the rates of recruitment, growth and mortality may be satisfactory (Anderson and Wheithman, 1978); this situation is fairly similar to that of an unexploited population. Fish populations that display PSD values between 35 and 65 are generally considered to be balanced (Gabelhouse, 1984;Willis et al, 1993;Gassner et al, 2003;Volta, to appear). Values below 35 indicate a shortage of adults in the population, while values above 65 indicate an excess of adult specimens, a probably insufficient level of reproduction or excessive mortality among younger individuals.…”
Section: Discussionmentioning
confidence: 99%
“…On the basis of this criterion, and according to Gassner et al (2003), two specific thresholds were defined in the second approach: L ∞ mean: expressed as the mean of the values of L ∞ of the 122 sampling sites analysed in order to draw up the standard growth model; Length at maturity (Lm): calculated from L ∞ mean by applying the equation log 10 Lm = 0.8979 log 10 L ∞ − 0.0782 (Froese and Binohlan, 2000). On the basis of these thresholds, the length classes were defined as follows (Gassner et al, 2003) (method 2): on the length classes for the PSD (RSD-Quality) using brown trout length-frequency data from 263 sampling sites in the River Tiber basin. Carline et al (1984) suggest that PSD increases with growth.…”
Section: P4mentioning
confidence: 99%
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“…The abundance metrics included in the final indices were fish density expressed as biomass or number per net and night, for which an increase with eutrophication is well documented (Minns et al, 1994;Appelberg et al, 2000;Belpaire et al, 2000;Gassner et al, 2003;Tammi et al, 2003;Garcia et al, 2006;Holmgren et al, 2007).…”
Section: Selected Metricsmentioning
confidence: 99%
“…Thus, a multimetric fish index has been proposed to evaluate the ecological quality of Flemish standing waters (Belpaire et al, 2000), and another simple index based on the abundance of a single species and importance of fish diseases has been suggested for assessing of the ecological quality of Catalan reservoirs (Catalan & Ventura, 2003). More recently, in Austria, Italy, France, Ireland and Estonia, scientists have proposed metrics to be used in assessment methods based on lake fish assemblages (Gassner et al, 2003;Gassner et al, 2005;Launois et al, 2011a;Launois et al, 2011b;Volta et al, 2011;Kelly et al, 2012;Palm et al, 2012). However, a common feature of all these indices or metrics is their restricted applicability due to the limited number of lakes available for estimating pressure-response relationships, as required by the WFD.…”
Section: Introductionmentioning
confidence: 99%