Effects of overripening on spawning behaviour and reproductive success of Atlantic salmon females spawning in a controlled flow channel

Gaudemar, B. De

doi:10.1006/jfbi.1998.0716

Cited by 28 publications

(30 citation statements)

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“…The fish may either have to spawn in unsuitable areas, or they may reach suitable spawning areas too late. Overripening of gonads may have a negative effect on egg viability, female spawning behaviour and spawning capacity (de Gaudemar and Beall 1998), so that delayed entry to the spawning areas may have a negative effect on reproductive success. However, as long as the salmon reach spawning areas in time before spawning, the population consequences of delays during the upstream migration are not known.…”

Section: Migration Delaysmentioning

confidence: 99%

Factors affecting the within-river spawning migration of Atlantic salmon, with emphasis on human impacts

Thorstad

Økland

Aarestrup³

et al. 2007

Rev Fish Biol Fisheries

205

236

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We review factors affecting the withinriver spawning migration of Atlantic salmon. With populations declining across the entire distribution range, it is important that spawners survive in the last phase of the spawning migration. Knowledge on the factors affecting migration is essential for the protection of populations, and to increase the success of reintroduction programmes. A number of studies have documented that the upstream migration may be delayed for many weeks at man-made obstacles such as power station outlets, residual flow stretches, dams, weirs and fishways. The fish may also be delayed at natural migration barriers. Often, the magnitude of delay is not predictable; fish may be considerably delayed at barriers that appear to humans to be easily passable, or they may quickly pass barriers that appear difficult. Stressful events like catch-and-release angling may affect upstream migration. Impacts of human activities may also cause altered migration patterns, affect the withinriver distribution of the spawning population, and severe barriers may result in displacement of the spawning population to other rivers. Factors documented to affect within-river migration include previous experience, water discharge, water temperature, water velocity, required jump heights, fish size, fish acclimatisation, light, water quality/pollution, time of the season, and catch and handling stress. How each of these factors affects the upstream migration is to a varying extent understood; however, the effects may differ among different river sections and sites. There are likely a number of additional important factors, and the relationship between different factors is complex. The understanding of general mechanisms stimulating fish within-river migration are still lacking, and it cannot be reliably predicted under which conditions a fish will pass a given migration barrier or which conditions are needed to stimulate migration at different sites. The strong focus on the effects of water discharge in past work may have hampered consideration of other factors. Exploration of the influence of these other factors in future studies could improve our understanding of what controls the upstream migration.

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Section: Migration Delaysmentioning

confidence: 99%

Factors affecting the within-river spawning migration of Atlantic salmon, with emphasis on human impacts

Thorstad

Økland

Aarestrup³

et al. 2007

Rev Fish Biol Fisheries

205

236

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“…Ceci a pour conséquence que si elles rencontrent des difficultés de migration vers l'amont, elles peuvent être contraintes à pondre dans des conditions non optimales sur les plans biologique et écophysiologique. En effet, des études sur plusieurs salmonidés (ESCAFFRE et BILLARD, 1979 ;GILLET, 1991 ;DE GAUDEMARD et BEALL, 1998) démontrent une baisse rapide de la qualité des ovules (fécondabilité) après qu'ils aient été libérés dans la cavité générale. Le lapse de temps pour frayer pourrait être assez court pour la truite puisque la qualité des ovules chute après une à deux semaines.…”

Section: Effet De La Fragmentation De L'habitat Et De L'hydrologie Suunclassified

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

Champigneulle¹,

Largiadèr

Caudron³

2003

Bull. Fr. Pêche Piscic.

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RÉSUMÉLa reproduction d'une population de truite (Salmo trutta L.) de forme essentiellement méditerranéenne est décrite dans le ruisseau du Chevenne, un torrent à forte pente (10 %) entrecoupé d'obstacles et limité en substrat de frai, situé dans les Alpes savoyardes. Les reproducteurs (résidents du torrent ou migrants issus du cours principal) diffèrent en taille et sexe-ratio. La majorité (58 %) des femelles migrantes entrent dans l'affluent déjà ovulées. Il existe une fort gradient décroissant aval-amont dans la répartition des géniteurs et des frayères. Les 157 frayères décrites montrent une grande diversité de microhabitats (5 types principaux) utilisés pour la reproduction, avec un pourcentage élevé (65 %) de frayères construites dans des sites protégés ayant une faible vitesse de courant (< 20 cm/s). La reproduction débute en radier, l'habitat de frai classique, puis elle s'étend ensuite aux autres microhabitats avant que le frai en milieu radier ne soit achevé. Une évaluation de la disponibilité et de l'utilisation du substrat favorable au frai (taille de 1 à 3 cm) dans les divers microhabitats a été réalisée a posteriori. Le microhabitat « côté de pool » (inhabituel pour le frai) est autant utilisé que le milieu radier. Les lentilles de substrat favorable, abritées en bordure de berge ou dans les courants sont préférées alors que les lentilles de substrat non protégées dans les courants sont évitées. Une crue en fin de la période de frai a totalement détruit 36 % des frayères avec un taux de destruction totale très variable selon le type de microhabitat de frai. Les frayères creusées en côté de pool et en bordure de berge protégées du courant ont été moins détruites (15-17 % de destruction totale) que dans les autres microhabitats (50 à 67 % de destruction totale). La diversité des sites de frai pourrait donc être une composante essentielle à la survie de la population de truite en milieu « torrent exposé à des crues hivernales ».Mots-clés : truite, salmo trutta, rivière à forte pente, reproduction, frayères, crue. Bull. Fr. Pêche Piscic. (2003) REPRODUCTION OF THE BROWN TROUT (Salmo trutta L.) IN THE TORRENT OF CHEVENNE, HAUTE-SAVOIE. AN ORIGINAL FUNCTIONING ? ABSTRACTThe spawning of a mainly endemic Mediterranean brown trout (Salmo trutta L.) population is described in Chevenne stream, a high-gradient (10%) boulder bed torrent, obstructed by small waterfalls, with scarce spawning substrate located in Alps of Savoy, France. The spawners (residents in the stream or migrants from the main river) differed in size and sex-ratio. A high percentage (58%) of already ovulated migrant females entered the stream. There is a great downstream-upstream decreasing gradient of spawner's and redd's number. A total of 157 redds was decribed showing a great diversity in the microhabitat (5 main types) used for spawning, particularly with a high percentage (65%) of redds built in protected zones with a low water velocity (< 20cm/s). Spawning first occurred in the standard riffle microhabitat, but also extended to othe...

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“…In sedentary brown trout, females start vitellogenesis in summer whereas the reproductive season occurs in December-January (Tyler, 1990;Estay et al, 1998). During this period, females compete for spawning sites and dig nests in gravel bars to protect eggs against predation, whereas males display intense and fierce agonistic behavior with conspecifics to gain access to sexual partners (Schroder, 1981;Beall and Marty, 1983;Berg et al, 1998;Gaudemar and Beall, 1998;Garcia-Vazquez et al, 2001;Esteve, 2005) or to provide paternal care (Tentelier et al, 2011). As these behavioral activities differ between sexes and are presumed to have a high energetic cost, and because feeding resources are rare at that period (Rincón and Lobón-Cerviá, 1997), the metabolic status at the onset of the breeding season and the variation of metabolite concentrations can potentially differ between sexes and are expected to play an important role on offspring production.…”

Section: Introductionmentioning

confidence: 99%

The concentration of plasma metabolites varies throughout reproduction and affects offspring number in wild brown trout (Salmo trutta)

Gauthey

Freychet

Manicki

et al. 2015

Comparative Biochemistry and Physiology Part A: Molecular &

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Effects of overripening on spawning behaviour and reproductive success of Atlantic salmon females spawning in a controlled flow channel

Cited by 28 publications

References 0 publications

Factors affecting the within-river spawning migration of Atlantic salmon, with emphasis on human impacts

Factors affecting the within-river spawning migration of Atlantic salmon, with emphasis on human impacts

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

The concentration of plasma metabolites varies throughout reproduction and affects offspring number in wild brown trout (Salmo trutta)

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