The Spawning Habitat Requirements of Sea Trout: A Multi‐Scale Approach

Walker, Alan; Bayliss, B.D.

doi:10.1002/9780470996027.ch21

Cited by 4 publications

(11 citation statements)

References 20 publications

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“…In this study, brown trout used a mean water depth of 21 cm, which was comparable with data from Grost et al. (), Walker & Bayliss (), Witzel Larry & MacCrimmon () (Fig. ).…”

Section: Resultssupporting

confidence: 89%

“…() and Zimmer & Power () found the same values for bottom velocities as presented in this study. Concerning mean velocity, Schneider () and Walker & Bayliss () recorded values similar to those in this study. In general, the data recorded in this study cover almost the whole range of reported velocities for spawning brown trout.…”

Section: Resultssupporting

confidence: 88%

“…In our study, brown trout tend to use more or less the same mean water depths reported in previous studies (Witzel Larry & MacCrimmon ; Grost et al. ; Walker & Bayliss ). Only studies with a special focus on large brown trout (Wollebæk et al.…”

Section: Discussionsupporting

confidence: 86%

“…Mean velocities ranged between 30 and 50 cm·s −1 (Crisp ; Grost et al. ; Walker & Bayliss ) and bottom velocities between 12 and 56 cm·s −1 (Ottaway et al. ; Witzel Larry & MacCrimmon ; Beard & Carline ; Essington et al …”

Section: Discussionmentioning

confidence: 99%

“…; Heggberget et al. ; Crisp & Carling ; Walker & Bayliss ; Wollebæk et al. ) have focused on the habitat use of brown trout in general, only a few studies were conducted in mountain streams (Barlaup et al.…”

Section: Introductionmentioning

confidence: 99%

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Timing of brown trout spawning in Alpine rivers with special consideration of egg burial depth

Riedl

Peter

2013

Ecology of Freshwater Fish

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Timing of spawning, habitat use and egg burial depths of brown trout were studied in seven Swiss (alpine and prealpine) rivers, which differed in size, altitude and flow regime. In general, we observed brown trout spawning activity between the end of October and the beginning of January. The spawning duration differed significantly, however, between rivers, ranging from 28 to 72 days. Analysis of environmental parameters for their influence on spawning activity revealed mean water temperature and altitude as the most explanatory variables. Detailed investigation of redd characteristics based on water velocity, water depth and substrate size clearly showed differences between positions on the redd. Brown trout in Alpine rivers preferred to use velocities of 30–40 cm·s−1, water depths of 10–20 cm and substrates of 16–32 mm for spawning. It has to be noted, however, that recorded values cover almost the whole range of data on spawning habitats that has been reported in literature so far. A special focus of this study was on egg burial depths, which were surprisingly not found to differ significantly between the rivers despite their different flow regimes. Recorded egg burial depths were, however, found to be distinctly lower (mean burial depth: 3.8 cm) than reported by almost any study so far. We see this observation of low burial depths in Alpine rivers as useful in the context of scouring effects, especially when evaluating the influence of scouring on fish populations.

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“…In this study, brown trout used a mean water depth of 21 cm, which was comparable with data from Grost et al. (), Walker & Bayliss (), Witzel Larry & MacCrimmon () (Fig. ).…”

Section: Resultssupporting

confidence: 89%

Section: Resultssupporting

confidence: 88%

Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Timing of brown trout spawning in Alpine rivers with special consideration of egg burial depth

Riedl

Peter

2013

Ecology of Freshwater Fish

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Environmental influences on life history strategies in partially anadromous brown trout (Salmo trutta, Salmonidae)

et al. 2019

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This paper reviews the life history of brown trout and factors influencing decisions to migrate. Decisions that maximize fitness appear dependent on size at age. In partly anadromous populations, individuals that attain maturity at the parr stage typically become freshwater resident. For individual fish, the life history is not genetically fixed and can be modified by the previous growth history and energetic state in early life. This phenotypic plasticity may be influenced by epigenetic modifications of the genome. Thus, factors influencing survival and growth determine life‐history decisions. These are intra‐ and interspecific competition, feeding and shelter opportunities in freshwater and salt water, temperature in alternative habitats and flow conditions in running water. Male trout exhibit alternative mating strategies and can spawn as a subordinate sneaker or a dominant competitor. Females do not exhibit alternative mating behaviour. The relationship between growth, size and reproductive success differs between sexes in that females exhibit a higher tendency to migrate than males. Southern populations are sensitive to global warming. In addition, fisheries, aquaculture with increased spreading of salmon lice, introduction of new species, weirs and river regulation, poor water quality and coastal developments all threaten trout populations. The paper summarizes life‐history data from six populations across Europe and ends by presenting new research questions and directions for future research.

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Environmental threats and conservation implications for Atlantic salmon and brown trout during their critical freshwater phases of spawning, egg development and juvenile emergence

Smialek

Pander

Geist

2021

Fisheries Management Eco

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Atlantic salmon Salmo salar L. and brown trout Salmo trutta fario L. are species of high socio‐economic and ecological value. Declining populations make them target species of fisheries management. This paper reviews the direct effects of deficient longitudinal connectivity, changes in discharge, high water temperatures, oxygen depletion, changes in water chemistry and increasing loads of fine sediment on the critical life stages of spawning, egg incubation and emergence. It further provides an overview about the basic autecological requirements of Atlantic salmon and brown trout and summarises important thresholds of physico‐chemical tolerances. This collection of information provides important baselines for assessing historical, ongoing and new threats relevant for the management of both species in fresh waters. Critical early‐life stages of both species are almost identical, creating synergies in conservation and restoration. Seaward‐migrating forms are exposed to further stressors, but improving starting conditions can also greatly improve their resilience.

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The Spawning Habitat Requirements of Sea Trout: A Multi‐Scale Approach

Cited by 4 publications

References 20 publications

Timing of brown trout spawning in Alpine rivers with special consideration of egg burial depth

Timing of brown trout spawning in Alpine rivers with special consideration of egg burial depth

Environmental influences on life history strategies in partially anadromous brown trout (Salmo trutta, Salmonidae)

Environmental threats and conservation implications for Atlantic salmon and brown trout during their critical freshwater phases of spawning, egg development and juvenile emergence

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