Emergence chronology of brook charr,Salvenus fontinalis, alevins in an acidic stream

Curry, R. Allen; Powles, Perce M.; Gunn, John M.; Liimatainen, V. A.

doi:10.1007/bf00002155

Cited by 11 publications

(12 citation statements)

References 28 publications

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“…The d 13 C values stabilized at 1-2‰ greater than benthic macroinvertebrates of the stream as YOY L F reached 28-30 mm. Given alevin size at emergence (18-20 mm;Curry et al, 1991 and YOY growth rates during summer (c. 0Á5 mm day À1 ; Curry et al, 1993), the exchange of nutrients appears to be complete by 20 days postemergence from incubation habitats. A similarly rapid turnover of tissue was reported for marine fish larva (Herzka & Holt, 2000).…”

Section: Mccarthy and Waldronmentioning

confidence: 99%

Assessing the reproductive contributions of sympatric anadromous and freshwater‐resident brook trout

Curry

2005

Journal of Fish Biology

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The d 13 C, d 15 N and d 34 S isotope values of newly emerged, brook trout Salvelinus fontinalis alevins (free-swimming individuals beginning exogenous feeding) were examined to determine if progeny of anadromous female spawners could be detected and their contributions to reproduction assessed in river systems with mixed migration strategies. Separation of anadromous and freshwater resident and immigrant sources of progeny could be detected primarily using d 13 C values before alevins reached a size of 28 mm fork length and c. 20 days after exogenous feeding began. Among 10 populations, the contributions of anadromous females ranged from 0 to 42% of newly emerged alevins. Correlations between anadromous contributions and estimates of total brook trout density and alevin production were unexpectedly negative. # 2005 The Fisheries Society of the British Isles

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Section: Mccarthy and Waldronmentioning

confidence: 99%

Assessing the reproductive contributions of sympatric anadromous and freshwater‐resident brook trout

Curry

2005

Journal of Fish Biology

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“…The selection may involve a critical minimum depth of water related to brook trout size (Smith, 1973). The most critical stimulus, however, appears to be related to the chemical or physical nature of discharging groundwater and the persistence of these characteristic s during the incubation period (Curry et al, 1991;Fraser, 1985;Gunn, 1986). The most critical stimulus, however, appears to be related to the chemical or physical nature of discharging groundwater and the persistence of these characteristic s during the incubation period (Curry et al, 1991;Fraser, 1985;Gunn, 1986).…”

Section: Implications For Brook Trout Reproductive Successmentioning

confidence: 99%

“…Because brook trout embryos are typically located in the upper 30 cm of substrate (Curry et al, 1991;Snucins et al, 1992), they will be extremely susceptible to freezing mortalities when redds are exposed. Exposed areas of groundwater seepage can remain unfrozen during winter, but seepage areas at the Parmachene site can freeze during periods of severe cold (R. Swainson, unpublished data).…”

Section: Implications For Brook Trout Reproductive Successmentioning

confidence: 99%

“…Emergence appears to be related to increases in groundwater discharge (Snucins et al, 1992) and declining stream flows (Curry et al, 1991). Emergence appears to be related to increases in groundwater discharge (Snucins et al, 1992) and declining stream flows (Curry et al, 1991).…”

Section: Implications For Brook Trout Reproductive Successmentioning

confidence: 99%

“…The presence of groundwater in the spawning and incubation habitat of brook trout appears to be critical for reproductive success (Curry et al, 1991;Fraser, 1985;Gunn, 1986). Groundwater may mitigate the effects of de-watering events (Brick, 1986), but the effects of regulated river discharge on spawning brook trout adults and the groundwater environment of incubating embryos have never been described.…”

Section: Introductionmentioning

confidence: 99%

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Effects of river flow fluctuations on groundwater discharge through brook trout, Salvelinus fontinalis, spawning and incubation habitats

et al. 1994

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The effects of short-term fluctuations in river discharge simulating a hydroelectricity peaking regime on the hydrogeological environment of the brook trout's reproductive habitats were examined. Fluctuating river levels altered shallow (< 2.5 m) groundwater pathways, chemistry, and flow potentials within the river bed at spawning and incubation sites. Rising river levels introduced river water into the bank where various degrees of mixing with groundwater occurred. Subsequent recessions of river levels increased the potentials for groundwater flow, particular in an offshore direction. The character of the river water -groundwater interaction appeared to be related to the hydrogeological nature of the river channel and adjacent catchment which varied among sites. The observations suggested hydroelectricity peaking regimes have potential negative impacts on brook trout reproduction.

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The Survival of Atlantic Salmon (Salmo salar) Eggs During Dewatering in a River Subjected to Hydropeaking

Casas‐Mulet

Saltveit

Alfredsen

2014

River Research & Apps

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Hydropeaking in regulated rivers is likely to become more frequent with increasing demands for renewable energy. Sudden fluctuations affect surface and subsurface flow regimes and change hydrological interactions occurring in the hyporheic zone. The hyporheic zone plays an important role for salmon embryonic development, and groundwater influx may create refuges for egg survival during low flow in hydropeaking regulated rivers. The links between salmon embryo survival and hyporheic hydrological processes during hydropeaking have hardly been investigated. A field experiment was undertaken in a 5 × 20 m side gravel bar subject to dewatering due to hydropeaking. Eleven cylindrical boxes composed of eight compartments were placed in the permanently wet area and the ramping zone. Sixty eggs were placed in two compartments (at 10 and 30 cm depth) in each box. Surface and interstitial water levels and temperatures were monitored at 2 min resolution. Data were collected for a period of 3 months, coinciding with early stages of salmonid egg development in this catchment. Egg compartments were checked on six occasions for survival after different hydropeaking events. Dead eggs were counted and removed. Survival rates were lower in the top compartments in the ramping zone (78%) compared with the boxes in the permanently wet area and the lowermost compartments in the ramping (survival rates >99%). With no water quality issues in the catchment and very low inputs of fine sediments in the egg compartments, exposure to dry conditions and subzero temperatures were the main factors explaining egg mortality in the top compartments of the ramping zone. The rate of survival will thus depend on the surface water and groundwater interactions. Site‐specific hydrological interactions occurring in the hyporheic zone should be actively considered when managing fish populations in rivers with hydropeaking. Copyright © 2014 John Wiley & Sons, Ltd.

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Emergence chronology of brook charr,Salvenus fontinalis, alevins in an acidic stream

Cited by 11 publications

References 28 publications

Assessing the reproductive contributions of sympatric anadromous and freshwater‐resident brook trout

Assessing the reproductive contributions of sympatric anadromous and freshwater‐resident brook trout

Effects of river flow fluctuations on groundwater discharge through brook trout, Salvelinus fontinalis, spawning and incubation habitats

The Survival of Atlantic Salmon (Salmo salar) Eggs During Dewatering in a River Subjected to Hydropeaking

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