REPRODUCTION DE LA TRUITE (Salmo trutta L.) DANS LETORRENT DE CHEVENNE, HAUTE-SAVOIE.UN FONCTIONNEMENT ORIGINAL ?

Champigneulle, Alexis; Largiadèr, Carlo R.; Caudron, Arnaud

doi:10.1051/kmae:2003021

Cited by 16 publications

(32 citation statements)

References 29 publications

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“…Admittedly, the highest daily mean in December recorded during our observation period did not exceed 33.05 m 3 AEs )1 (December 2002) and we assume that higher discharges in the range of annual highs (57 m 3 AEs )1 ) cause mortality and reduce the YOY-class strength drastically (Nelson 1986). The extended spawning period can be an adaptation to the unpredictable and harsh flow conditions, as supported by Gortázar et al (2007) and Champigneulle et al (2003) or the consequence of introgression of foreign strains as a result of stocking. The extended spawning period can be an adaptation to the unpredictable and harsh flow conditions, as supported by Gortázar et al (2007) and Champigneulle et al (2003) or the consequence of introgression of foreign strains as a result of stocking.…”

Section: Discussionsupporting

confidence: 89%

The influence of hydrology on the recruitment of brown trout in an Alpine river, the Ybbs River, Austria

Unfer¹,

Hauer²,

Lautsch³

2010

Ecology of Freshwater Fish

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We monitored yearly recruitment (1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008) of brown trout (Salmo trutta) in a fourth-order Austrian Alpine river. The relative proportion of recruits to adult fish varied strongly among years (5.6-66.4%). These proportions were strongly correlated with specific flow patterns. High flows before and during the spawning period were positively correlated with recruitment, whereas high flows during incubation and emergence were negatively correlated with recruitment success. Unsteady flow modelling supported a causal hypothesis for these relationships in demonstrating that discharges > 30 m 3 AEs )1 resulted in substantial sediment motion (erosion and deposition) in suitable spawning areas within the study stretch.

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Section: Discussionsupporting

confidence: 89%

The influence of hydrology on the recruitment of brown trout in an Alpine river, the Ybbs River, Austria

Unfer¹,

Hauer²,

Lautsch³

2010

Ecology of Freshwater Fish

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“…Distinct spawning behaviours related to either the timing of spawning and ⁄ or use of specific habitats that influence the duration of the incubation period have already been reported in other salmonid species (Hansen, 1975;Hendry, Hensleigh & Reisenbichler, 1998;Beer & Anderson, 2001). One can also speculate that the co-existence of these distinct tactics that result in a wider range of hatching ⁄ emergence dates may enhance population stability, as has been suggested for brown trout (Salmo trutta, L.) in mountain streams (Hansen, 1975;Champigneulle, Largiader & Caudron, 2003). the selection of cold-regime ⁄ downwelling sites versus warm-regime ⁄ upwelling sites) does not confer an advantage in fitness, assuming both tactics have been maintained since brook trout colonised the Canadian Shield c. 10 000 years ago (Mandrak & Crossman, 1992).…”

Section: Contrasting Thermal Regimes In Incubation Microhabitats: Dismentioning

confidence: 63%

Alternative tactics in spawning site selection by brook trout (Salvelinus fontinalis) related to incubation microhabitats in a harsh winter environment

et al. 2012

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Summary 1. Species with distributions that span a broad range of latitudes may have populations that exhibit distinct life history traits associated with environmental gradients. The majority of previous studies have indicated a strong association between spawning site selection by brook trout (Salvelinus fontinalis) and the presence of upwelling groundwater, but does this generalisation extend to the thermal regimes experienced at northern sites? 2. We investigated the role of hyporheic flow in redd site selection by brook trout in a relatively high‐latitude boreal system. Hyporheic flows through streambed substratums can be dominated by groundwater or surface water and may be influenced by the presence of morphological features. For autumn spawners such as brook trout, embryos situated in microhabitats where hyporheic flow in the shallow substratum is groundwater dominant (i.e. warmer in winter) are likely to experience accelerated development rates relative to embryos in redds where there is downwelling surface water (i.e. colder in winter). 3. We measured vertical hydraulic gradients (VHG) at the microhabitat scale and spatial and temporal variation in upwelling/downwelling flow and thermal regimes in brook trout spawning/incubation habitats. Additionally, we noted the proximity of redd sites to stream morphological features (e.g. riffle crests). 4. Our results indicate that upwelling flow was not a decisive cue in redd site selection at the microhabitat scale (100 m) as an approximately equal number of redds were situated in microhabitats with upward flow as compared to microhabitats with downward flow through the redd. Redds situated on bedforms with convex longitudinal profiles (e.g. riffle crests, log steps) were associated with downward flow, whereas redds not immediately adjacent to these bedform features were associated with upward flow. Winter streambed temperatures confirmed that both sites with steady upwelling (i.e. warm incubation regime) and downwelling (i.e. cold incubation regime) were indeed selected by spawners. 5. Our observations that spawners utilised both cold‐regime and warm‐regime sites suggests the existence of distinct reproductive tactics related to hyporheic flow patterns in this boreal system. As temperature is the dominant factor controlling rates of embryonic development, the use of spawning microhabitats with distinct thermal regimes implies substantial differences in the timing of hatching and the phenology of emergence.

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“…Furthermore, the water temperature in the Castril was always within the brown trout 'growth zone', as defined by Elliott (1994). The highest densities reported by Champigneulle et al (2003) in a highly fragmented mountain stream (6.3 reddsAE100 m )2 ) greatly exceeded the Castril redd densities. The highest redd density in our study (reach 3) was slightly lower than that reported by Rubin et al (2004) for sea trout (1.56 -reddsAE100 m )2 ).…”

Section: Influence Of Stream Flow and Water Temperaturementioning

confidence: 77%

“…The Mediterranean climate of this region shapes the flow regime, making its interannual variations highly unpredictable: peak flows may occur at any time during the spawning season. Champigneulle et al (2003) already suggested that spatio-temporal dispersion of reproduction is likely to impede population extinction. It is known that a catastrophic event (like a spate or a drought) may weaken the year's recruitment if it happens at the critical stages of the life cycle (e.g., Frost & Brown 1967;Anderson 1983;Spina 2001;Cattanéo et al 2002) and thus, it might put the population at risk.…”

Section: Spawning Periodmentioning

confidence: 99%

“…The spatial dispersion of redd sites among different macrohabitats may be a good system to avoid complete loss of the offspring if a catastrophic event happens (Champigneulle et al 2003). Redds located in different macrohabitats may have different probabilities of being destroyed, for instance, by a high flow which may scour the gravels and the eggs (Kondolf et al 1991), or by a drought, which may leave the shallower redds stranded.…”

Section: Redd Featuresmentioning

confidence: 99%

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Spawning period of a southern brown trout population in a highly unpredictable stream

Gortázar

Jalón

Alonso

et al. 2007

Ecology of Freshwater Fish

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– The spawning period of brown trout (Salmo trutta L.) was studied in the river Castril, southern Spain, by means of redd counts. This mountain stream is located near to the southern limit of the species’ natural distribution range and it shows a highly unpredictable flow regime. The spawning period extended from December to mid‐April and the maximum reproductive activity was in February. These results represent the latest reproduction date and the longest spawning period reported in the literature along the natural distribution range of the species. However, belated spawning in the Castril is congruent with the known latitudinal cline: the lower the latitude, the later the spawning period. Our results, along with a review of the literature on natural populations, also showed that the duration of reproduction is the longer, the lower the latitude. Spawning lasted twice as long in the main stem of the river, which is connected with a reservoir, than in the isolated reaches. These differences may be linked to the influence of the reservoir and to habitat fragmentation. We discuss and support the hypothesis that a long spawning period is an advantage for survival in unpredictable habitats. The belated and protracted spawning period found in river Castril has important implications in fisheries management. A strong research effort is needed in order to fill the critical lack of data on southern brown trout populations.

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REPRODUCTION DE LA TRUITE (Salmo trutta L.) DANS LETORRENT DE CHEVENNE, HAUTE-SAVOIE.UN FONCTIONNEMENT ORIGINAL ?

Cited by 16 publications

References 29 publications

The influence of hydrology on the recruitment of brown trout in an Alpine river, the Ybbs River, Austria

The influence of hydrology on the recruitment of brown trout in an Alpine river, the Ybbs River, Austria

Alternative tactics in spawning site selection by brook trout (Salvelinus fontinalis) related to incubation microhabitats in a harsh winter environment

Spawning period of a southern brown trout population in a highly unpredictable stream

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