Movements of ultrasonically tagged brown trout (<i>Sulmo trutta</i> L.) in Lake Constance

Schulz, Uwe Horst; Berg, R.G. van den

doi:10.1111/j.1095-8649.1992.tb02636.x

Cited by 31 publications

(26 citation statements)

References 15 publications

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“…Brown trout used well-illuminated pelagic habitat in June and September and preyed selectively on DR whitefish. In addition to lower light level, the habitat selection in the vicinity of the bottom provides efficient refuge against pelagic cruising predators such as brown trout (Schulz & Berg 1992). Our results indicate that diel and seasonal habitat selection by DR whitefish was strongly regulated by the risk of predation.…”

Section: Discussionmentioning

confidence: 73%

Polar light regime and piscivory govern diel vertical migrations of planktivorous fish and zooplankton in a subarctic lake

Kahilainen

Malinen

Lehtonen

2009

Ecology of Freshwater Fish

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Seasonal variation in light intensity has strong impacts on invertebrate and vertebrate habitat selection creating trade-offs between foraging gain and risk of death. Diel vertical migration (DVM) has received a particularly interest, but multitrophic level studies in lakes under polar light regime have not been conducted. Here, we examined habitat selection of pelagic zooplankton, planktivores and piscivores in subarctic Lake Muddusjärvi with polymorphic whitefish (Coregonus lavaretus (L.)). Seasonal change in light was hypothesized to be the most important abiotic factor inducing DVM, whereas predation was considered as an ultimate biotic factor. During period of mid-night sun in June, no DVM was observed at any trophic level, whereas during normal day and night light in September planktivores and zooplankton migrated. DVM was top-down controlled, where piscivorous brown trout (Salmo trutta L.) used pelagic habitat continuously inducing DVM of its main prey, pelagic whitefish morph, which cascaded to reverse DVM of zooplankton. Top-down control of lower trophic level DVMs by piscivores might be more general pattern in lakes than previously considered.

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Section: Discussionmentioning

confidence: 73%

Polar light regime and piscivory govern diel vertical migrations of planktivorous fish and zooplankton in a subarctic lake

Kahilainen

Malinen

Lehtonen

2009

Ecology of Freshwater Fish

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“…It was assumed that there were no significant tagging influences on fish behaviour in the present study as transmitters <0·8% of individual body mass were used. Other authors observed no effects on growth and fish behaviour of transmitters <1·6%(Ross & McCormick, 1981;Lucas, 1989; Baade & Fredrich, 1998), <2·5%(Thoreaux & Baras, 1996) or <5%(Schulz & Berg, 1992). Electrofishing was the most useful catch method whereas weir baskets or trawl catches damaged the skin of the fish considerably (unpubl.…”

Section: Discussionmentioning

confidence: 98%

Spawning migrations of the chub in the River Spree, Germany

Fredrich

Ohmann

Curio

et al. 2003

Journal of Fish Biology

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Out of 52 chub Leuciscus cephalus tagged with internal radio‐transmitters, 46 migrated to spawning grounds in the River Spree, Germany. All chub started their first spawning migration on 21–22 May in both years of study, 1995 and 1996. They arrived at three different spawning grounds within a day and left after 1 to 6 days to return to their original sites. On 17 and 18 June 1995 and 1996 chub started their second spawning migration with the same pattern as the first. About 60% of all migrating chub moved between 1 and 13 km upstream to the nearest spawning ground. Some exceptions were observed: a few chub did not use the nearest spawning ground, some chub used different spawning grounds at first and second spawning or moved downstream to a spawning ground. Spawning grounds were characterized by 0·4 m s−1 current velocity, shallow depth (0·1–0·8 m) and a stony bottom, where most eggs adhered.

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“…It was assumed that tagging did not influence fish behaviour as transmitters were smaller than 2% of individual asp body weight (Ross and McCormick, 1981; Lucas, 1989; Schulz and Berg, 1992; Thoreau and Baras, 1996; Huber and Kirchhofer, 1998; Martinelli et al., 1998). Unfavourable weather conditions (high temperatures) negatively influenced tagging success; all three fish tagged according to the same method as others but in water temperature >20°C died within a month near the release site.…”

Section: Discussionmentioning

confidence: 99%

Long-term investigations of migratory behaviour of asp (Aspius aspius L.) in the middle part of the Elbe River, Germany

Fredrich

2003

Journal of Applied Ichthyology

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Summary The migratory behaviour, habitat use, home range and temporal and spatial variability of migrations of the potamodromous asp (Aspius aspius L.) in the large Elbe River, Germany, were studied in the years 1997–2000. Fifty‐three asp were tagged with surgically implanted radio transmitters and individually hand‐tracked usually once per week for about 1 year; 50% of the asp exclusively inhabited the main channel, 22% moved for short visits into other habitats and 24% changed between winter habitats in a harbour or oxbow and summer habitats in the main channel where they spawned in late March/April. The migratory behaviour of asp was highly variable; 34 asp observed for more than 1 year lived in home ranges of 1 to >100 stream kilometres (skm) mostly near their capture site. Longest observed migration from summer habitat in the Tidal Elbe back to the spawning ground in the Middle Elbe was 166 skm. After the spawning period or the spawning period thereafter, nine of these 34 fish left their home ranges for a long downstream migration without returning during the observation period. From these results we conclude that populations of rheophilic, potamodromous fish use a surprisingly long river section and that weirs have a strong impact on migration patterns and, ultimately, on population dynamics of these species.

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Movements of ultrasonically tagged brown trout (Sulmo trutta L.) in Lake Constance

Cited by 31 publications

References 15 publications

Polar light regime and piscivory govern diel vertical migrations of planktivorous fish and zooplankton in a subarctic lake

Polar light regime and piscivory govern diel vertical migrations of planktivorous fish and zooplankton in a subarctic lake

Spawning migrations of the chub in the River Spree, Germany

Long-term investigations of migratory behaviour of asp (Aspius aspius L.) in the middle part of the Elbe River, Germany

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