Egg-to-fry survival of the sea trout in some streams of Gotland

Rubin, Jean‐François

doi:10.1006/jfbi.1996.0059

Cited by 43 publications

(73 citation statements)

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“…Fine sediment accumulation and gravel bed clogging can disturb interstitial flow, and subsequently oxygen supply, which is crucial for egg to fry survival (Rubin and Glimsater 1996;Rubin 1998). Critical thresholds of interstitial oxygen concentration for brown trout eggs are in the range of 7-10 mg l −1 (Rubin and Glimsater 1996;Ingendahl 2001;Malcolm et al 2003).…”

Section: Sediment Deposition and Riverbed Clogging Influencing Embryomentioning

confidence: 99%

“…Critical thresholds of interstitial oxygen concentration for brown trout eggs are in the range of 7-10 mg l −1 (Rubin and Glimsater 1996;Ingendahl 2001;Malcolm et al 2003). Embryos, after hatching, are less sensitive to locally low oxygen availability, as they are more mobile (Greig et al 2007).…”

Section: Sediment Deposition and Riverbed Clogging Influencing Embryomentioning

confidence: 99%

“…As a consequence, it was suggested that other grain size-based descriptors of gravel composition (e.g. geometric mean (d g ), sorting coefficient (S 0 ) and Fredle index (F i : index of permeability; Lotspeich and Everest 1981) might be better descriptors for survival rates (d g : Rubin and Glimsater 1996;F i : Chapman 1988;S 0 : Ingendahl 2001). However, other studies found no clear relationships between these parameters and survival rates (d g : Chapman 1988;Rubin 1998;Ingendahl 2001;F i : Ingendahl 2001).…”

Section: Sediment Deposition and Riverbed Clogging Influencing Embryomentioning

confidence: 99%

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Climate and land-use changes affecting river sediment and brown trout in alpine countries—a review

Scheurer

Alewell

Bänninger

et al. 2008

Environ Sci Pollut Res

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Background, aim, and scope Catch decline of freshwater fish has been recorded in several countries. Among the possible causes, habitat change is discussed. This article focuses on potentially increased levels of fine sediments going to rivers and their effects on gravel-spawning brown trout. Indications of increased erosion rates are evident from land-use change in agriculture, changes in forest management practices, and from climate change. The latter induces an increase in air and river water temperatures, reduction in permafrost, changes in snow dynamics and an increase in heavy rain events. As a result, an increase in river sediment is likely. Suspended sediment may affect fish health and behaviour directly. Furthermore, sediment loads may clog gravel beds impeding fish such as brown trout from spawning and reducing recruitment rates. To assess the potential impact on fine sediments, knowledge of brown trout reproductive needs and the effects of sediment on brown trout health were evaluated. Approach We critically reviewed the literature and included results from ongoing studies to answer the following questions, focusing on recent decades and rivers in alpine countries.-Have climate change and land-use change increased erosion and sediment loads in rivers? -Do we have indications of an increase in riverbed clogging?-Are there indications of direct or indirect effects on brown trout from increased suspended sediment concentrations in rivers or from an increase in riverbed clogging?Results Rising air temperatures have led to more intensive precipitation in winter months, earlier snow melt in spring, and rising snow lines and hence to increased erosion. Intensification of land use has supported erosion in lowland and prealpine areas in the second half of the twentieth century. In the Alps, however, reforestation of abandoned land at high altitudes might reduce the erosion risk while intensification on the lower, more easily accessible slopes increases erosion risk. Data from laboratory experiments show that suspended sediments affect the health and behaviour of fish when available in high amounts. Point measurements in large rivers indicate no common lethal threat and suspended sediment is rarely measured continuously in small rivers. However, effects on fish can be expected under environmentally relevant conditions. River bed clogging impairs the reproductive performance of gravel-spawning fish. Discussion Overall, higher erosion and increased levels of fine sediment going into rivers are expected in future. Additionally, sediment loads in rivers are suspected to have considerably impaired gravel bed structure and brown trout spawning is impeded. Timing of discharge is put forward and is now more likely to affect brown trout spawning than in previous decades. Conclusions Reports on riverbed clogging from changes in erosion and fine sediment deposition patterns, caused by climate change and land-use change are rare. This review identifies both a risk of increases in climate erosive forces and fine sedi...

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Section: Sediment Deposition and Riverbed Clogging Influencing Embryomentioning

confidence: 99%

Section: Sediment Deposition and Riverbed Clogging Influencing Embryomentioning

confidence: 99%

Section: Sediment Deposition and Riverbed Clogging Influencing Embryomentioning

confidence: 99%

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Climate and land-use changes affecting river sediment and brown trout in alpine countries—a review

Scheurer

Alewell

Bänninger

et al. 2008

Environ Sci Pollut Res

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“…A particularly important linkage between hyporheic water quality and aquatic ecology is represented by the issue of low dissolved oxygen supply in the benthic zone (Malard and Hervant, 1999;Finn, 2007). In this regard, a specific area that has been studied intensively is the effect of low dissolved oxygen supply on the survival of salmonid embryos incubating in river spawning beds (Chevalier et al, 1984;Peterson and Quinn, 1996;Rubin and Glimsater, 1996;Malcolm et al, 2003;Armstrong et al, 2003;Youngson et al, 2004;Greig et al, 2006;Sear et al, 2013). Incubating salmonids spend a period of months (typically 4-6) in the hyporheic zone between oviposition and emergence or 'swim up', and transient episodes of de-oxygenation have been identified as the cause of sub-lethal or lethal outcomes which ultimately impact on recruitment to populations (Youngson et al, 2004;Malcolm et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Sources of sediment-bound organic matter infiltrating spawning gravels during the incubation and emergence life stages of salmonids

Collins¹,

Williams²,

Zhang³

et al. 2014

Agriculture, Ecosystems & Environment

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Keywords:Sediment-bound organic matter Sources Carbon and nitrogen stable isotopes Near infra-red reflectance spectroscopy Salmonids Farm manures A B S T R A C TThe biodegradation of organic matter ingressing spawning gravels in rivers exerts an oxygen demand which is believed to contribute to detrimental impacts on aquatic ecology including salmonids. Catchment management strategies therefore require reliable information on the key sources of sediment-bound organic matter. Accordingly, a novel source fingerprinting procedure based on analyses of bulk stable 13 C and 15N isotope values and organic molecular structures detected using near infrared reflectance (NIR) spectroscopy was tested for assessing the primary sources of sediment-bound organic matter infiltrating artificial Atlantic salmon spawning redds in five rivers across England and Wales. Statistically-verified source fingerprints were identified using a combination of the Kruskal-Wallis Htest, principal component analysis and GA-driven discriminant function analysis. Interstitial sediment samples were obtained from artificial redds using retrievable basket traps inserted at the start of the salmonid spawning season and extracted subsequently in conjunction with critical juvenile phases (eyeing, hatch, emergence, late spawning) of fish development associated with incubation and emergence. Over the duration of these four basket extractions, the overall relative frequency-weighted average median source contributions to the interstitial sediment-bound organic matter sampled in the study rivers ranged between 26% (full uncertainty range 0-100%) and 44% (full uncertainty range 0-100%) for farm yard manures/slurries, 11% (full uncertainty range 0-75%) and 48% (full uncertainty range 0-99%) for damaged road verges, 16% (full uncertainty range (0-78%) and 52% (full uncertainty range (0-100%) for decaying instream vegetation and 4% (full uncertainty range 0-31%) and 10% (full uncertainty range (0-44%) for human septic waste. The results of mass conservation tests suggest that the procedure combining bulk 13 C and 15 N isotope values and NIR spectroscopy data on organic molecular structures is sensitive to the risks of significant non-conservative tracer behaviour in the fluvial environment and will therefore not necessarily work at all in-channel sites in all catchments.

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“…Low YOY trout densities in sites with extensive river bed clogging are the direct consequence of this. Low egg-to-fry survival of brown trout was correlated with a high percentage of fi ne sediments in different Research Article 49 studies carried out by Acornley and Sear (1999), Massa et al (1998) or Rubin and Glimsater (1996). Bagliniere and Maisse (2002) confi rmed the low egg-to-fry survival (1.3-14.7 %) for the river Scorff, which is suggested to be due to the amount of fi nes (<2 mm) in the substrate.…”

Section: Discussionmentioning

confidence: 99%

Status of young-of-the-year brown trout (Salmo trutta fario) in Swiss streams: factors influencing YOY trout recruitment

2007

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Abstract. As part of the Swiss Fischnetz project (network for declining fi sh yields in Switzerland) studies were carried out to investigate the decline in catches of brown trout. Insuffi cient YOY (young-of-the-year) recruitment of brown trout due to different abiotic and/or biotic factors was hypothesized as a potential cause of this decline. Quantitative assessments of fi sh ecology parameters and habitat measurements were carried out at 97 river sites over a two-year period. The main objectives of this study were to document the occurrence and abundance of naturally reproduced YOY trout and to develop an understanding of environmental factors responsible for the observed YOY density. A general linear model (GLM) was used to analyse the infl uence of selected environmental abiotic and biotic parameters on YOY density.Successful recruitment of YOY trout was observed in all but three of the sites studied. Abundance was correlated with abiotic and biotic factors, such as river width, slope, altitude, substratum condition, and the occurrence of proliferative kidney disease (PKD). The results highlight the importance of small streams for natural YOY recruitment of brown trout and their function as a source of individuals for downstream river sections.

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Egg-to-fry survival of the sea trout in some streams of Gotland

Cited by 43 publications

References 0 publications

Climate and land-use changes affecting river sediment and brown trout in alpine countries—a review

Climate and land-use changes affecting river sediment and brown trout in alpine countries—a review

Sources of sediment-bound organic matter infiltrating spawning gravels during the incubation and emergence life stages of salmonids

Status of young-of-the-year brown trout (Salmo trutta fario) in Swiss streams: factors influencing YOY trout recruitment

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