Food preference of adult whitefish in eutrophic Lake Hallwil (Switzerland), and the question of cannibalism

Enz, C. A.; Bürgi, H. R.; Stössel, F.; Müller, R.

doi:10.1127/archiv-hydrobiol/152/2001/81

Cited by 7 publications

(8 citation statements)

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“…If the pelagic food chain length has changed, then δ 13 C and δ 15 N should be correlated, which is not what was observed. The whitefish is a pelagic zooplanktivorous fish, but could be opportunistic and rely on the most abundant food source (Mookerji et al ., 1998; Enz et al ., 2001; Gerdeaux et al ., 2002). Studies on the stomach contents revealed no major change in the whitefish diet between the 1980s and 2001 (Ponton, 1986; Gerdeaux & Hamelet, 2001), and they were still showing a preference for cladocerans ( Daphnia spp.)…”

Section: Discussionmentioning

confidence: 99%

Using the δ¹³C and δ¹⁵N of whitefish scales for retrospective ecological studies: changes in isotope signatures during the restoration of Lake Geneva, 1980–2001

Perga¹,

Gerdeau×²

2003

Journal of Fish Biology

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The scales of whitefish Coregonus lavaretus were used in place of dorsal muscle, which necessitates killing the fish, to study food webs from the δ13C and δ15N isotopic ratios in the organic fraction. As scales are composed of both organic and calcified fractions, a protocol for scale decalcification was first devised. The δ13C and δ15N values of the decalcified scales were then shown to be closely correlated to those of the dorsal muscle, demonstrating that scales could be used in place of muscle to study food webs. Changes in the δ13C of whitefish were determined from a scale collection that extended over the period during which the trophic state of Lake Geneva was recovering.

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Section: Discussionmentioning

confidence: 99%

Using the δ¹³C and δ¹⁵N of whitefish scales for retrospective ecological studies: changes in isotope signatures during the restoration of Lake Geneva, 1980–2001

Perga¹,

Gerdeau×²

2003

Journal of Fish Biology

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“…Even when a fish has free access to an appropriate food supply, its share of this resource will depend on the strength of intra-and interspecific competition. Whitefish are known to feed very selectively, yet are able to adapt very flexibly to changes in their prey spectrum (Becker & Eckmann 1992, Mookerji et al 1998, Enz et al 2001. With decreasing food abundance, however, competition will increasingly restrict whitefish growth.…”

Section: The Growth Phasementioning

confidence: 99%

A review of the population dynamics of coregonids in European alpine lakes

Eckmann¹

2013

adv_limnology

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The population dynamics of coregonids in European alpine lakes have been studied intensively during recent decades. Many of these studies have focussed on the impacts of anthropogenic eutrophication and subsequent re-oligotrophication. These changes in productivity represent the single most important perturbation of coregonid habitats since the mid-twentieth century. While the problem of eutrophication has been successfully addressed in many European alpine lakes, new forms of anthropogenic challenge such as climate change and the colonization of lakes by non-native aquatic species continue to impact on coregonid populations and demand research. The picture that emerges from a compilation of primary research papers suggests that abiotic and biotic factors are most influential on year-class strength during the larval phase, exerting more moderate effects during the embryonic and reproductive phases, and only a weak influence during the growth phase. In contrast, individual biomass is mainly determined during the growth phase, but moderate effects on growth may also occur during the larval and reproductive phases. Changes in lake productivity influence the various life-history phases of coregonids in both positive and negative ways, for example by improving feeding conditions and via deterioration of spawning habitat quality. Climate change, on the other hand, seems to influence mainly the embryonic and larval phases, with the available studies suggesting that higher temperatures and earlier onset of stratification in spring tend to boost year-class strength. These effects, however, appear insufficient to balance the marked effects of re-oligotrophication, which has caused and continues to cause a marked depression of growth in many European alpine lakes. The bumper fish harvests obtained during the peak of anthropogenic eutrophication are thus a thing of the past.

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“…Both predatory cladocerans were very rare in the lake. Enz et al (2001) and Palmer et al (2001) also observed that Bythotrephes was consumed in higher amounts than Leptodora by whitefish. Palmer et al (loc.…”

Section: Discussionmentioning

confidence: 90%

“…Cyclopoid copepods were seen to be consumed in greater quantities than calanoids, which in most cases were negatively selected, by Coregonus sp. (Enz et al 2001, Schultz et al 2003.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Diet composition and prey selection of vendace Coregonus albula in the mesotrophic, temperate Lake Ostrowite (Northern Poland)

Kakareko

Napiórkowski

Kozłowski

2008

Oceanological and Hydrobiological Studies

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Lake Ostrowite is a mesotrophic lake in Northern Poland 280.7 ha in area and 43 m deep at its deepest point. To study vendace (Coregonus albula L.) diet in the lake, fish and zooplankton were sampled at two stations on 28-29 April, 15-16 May (fish only), 28-29 July and 15-16 August 2004. Fish were caught by gill netting, while zooplankton was collected from the whole water column by means of a Ruttner sampler (5 × 2 dm 3 ). In total 91 vendace specimens were analysed, of which 64.8% had non-empty alimentary tracts. In the April and May samples Copepoda were

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Food preference of adult whitefish in eutrophic Lake Hallwil (Switzerland), and the question of cannibalism

Cited by 7 publications

References 0 publications

Using the δ¹³C and δ¹⁵N of whitefish scales for retrospective ecological studies: changes in isotope signatures during the restoration of Lake Geneva, 1980–2001

Using the δ¹³C and δ¹⁵N of whitefish scales for retrospective ecological studies: changes in isotope signatures during the restoration of Lake Geneva, 1980–2001

A review of the population dynamics of coregonids in European alpine lakes

Diet composition and prey selection of vendace Coregonus albula in the mesotrophic, temperate Lake Ostrowite (Northern Poland)

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Food preference of adult whitefish in eutrophic Lake Hallwil (Switzerland), and the question of cannibalism

Cited by 7 publications

References 0 publications

Using the δ13C and δ15N of whitefish scales for retrospective ecological studies: changes in isotope signatures during the restoration of Lake Geneva, 1980–2001

Using the δ13C and δ15N of whitefish scales for retrospective ecological studies: changes in isotope signatures during the restoration of Lake Geneva, 1980–2001

A review of the population dynamics of coregonids in European alpine lakes

Diet composition and prey selection of vendace Coregonus albula in the mesotrophic, temperate Lake Ostrowite (Northern Poland)

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Using the δ¹³C and δ¹⁵N of whitefish scales for retrospective ecological studies: changes in isotope signatures during the restoration of Lake Geneva, 1980–2001

Using the δ¹³C and δ¹⁵N of whitefish scales for retrospective ecological studies: changes in isotope signatures during the restoration of Lake Geneva, 1980–2001