Spawning locations and movement of Kootenai River white sturgeon

Paragamian, Vaughn L.; Wakkinen, Virginia; Kruse, Gretchen

doi:10.1046/j.1439-0426.2002.00397.x

Cited by 53 publications

(40 citation statements)

References 15 publications

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“…Positive relationships between daily numbers of individuals entering rivers and water temperature are frequently reported in migratory fishes including Acipenseridae (Paragamian et al , 2002; Dahl et al , 2004). There was no change in the levels of migratory activity in the range of spring temperatures observed on the UBR.…”

Section: Discussionmentioning

confidence: 99%

Environmental and lunar cues are predictive of the timing of river entry and spawning‐site arrival in lake sturgeon Acipenser fulvescens

Forsythe

Scribner

Crossman

et al. 2012

Journal of Fish Biology

100

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The associations were quantified between daily and interannual variation in the timing of a closed population of lake sturgeon Acipenser fulvescens migration and arrival at spawning sites with stream environmental and lunar covariates. Spawning data were gathered from 1262 fish in Black Lake, Michigan 2001 to 2008 and by video monitoring 2000 to 2002. Sex‐specific variation in responses to external cues was also tested. Results showed that a greater number of individuals initiated migration from lake to riverine habitats at dawn and dusk relative to other times of the day. Current and lagged effects of water temperature and river discharge, and periods in the lunar cycle were important variables in models quantifying movements into the river and timing of adult arrival at spawning sites. Different suites of covariates were predictive of A. fulverscens responses during different periods of the spawning season. The timing of initiation of migration and spawning, and the importance of covariates to the timing of these events, did not differ between sexes. Stream flow and temperature covaried with other variables including day length and the lunar cycle. Anthropogenic disruption of relationships among variables may mean that environmental cues may no longer reliably convey information for Acipenseriformes and other migratory fishes.

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Section: Discussionmentioning

confidence: 99%

Environmental and lunar cues are predictive of the timing of river entry and spawning‐site arrival in lake sturgeon Acipenser fulvescens

Forsythe

Scribner

Crossman

et al. 2012

Journal of Fish Biology

100

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“…Artificial substrate mats (McCabe & Beckman 1990) were used to document white sturgeon spawning from 1994 to 2002 (Paragamian & Wakkinen 2002). Embryonic age in hours of collected white sturgeon eggs was estimated using criteria developed by Beer (1981).…”

Section: Methodsmentioning

confidence: 99%

“…Initial studies suggested discharges for white sturgeon spawning in the Kootenai River should be >630 m 3 s −1 and ideally >1200 m 3 s −1 (Paragamian & Wakkinen 2002). Spawning usually occurred when river temperature was at least 8 °C, and most spawning occurred when water temperatures were 9.5–12.5 °C (Paragamian & Wakkinen 2002), but whether and when white sturgeon would spawn in relation to the additional volume of water released from Libby Dam in accordance with the USFWS Recovery Plan had not been evaluated.…”

Section: Introductionmentioning

confidence: 99%

White sturgeon spawning and discharge augmentation

Paragamian

Wakkinen

2011

Fisheries Management Eco

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Observed spawning events of endangered Kootenai River white sturgeon, Acipenser transmontanus (Richardson), during 1994-2002 were examined to evaluate the effects of discharge from Libby Dam on spawning. Discharge from Libby Dam was manipulated in most years to provide enhanced flows (hereafter, augmented discharge) for white sturgeon spawning. The annual onset of spawning appeared independent of augmented discharge because initial spawning occurred prior to augmented discharge in 4 of 6 years. Spawning began 2-11 days after the highest river discharge in 4 of 9 years. Linear regression analysis indicated the onset of spawning was positively related to mean daily discharge from the dam but not mean daily temperature, 1-day change in discharge (D discharge) or 3-day D discharge. Logistic regression analysis suggested the probability of a spawning event was influenced by Julian date, mean daily water temperature, mean daily discharge and the 7-day D discharge, but the predictive indices were small. Minor fluctuations in temperature and discharge characteristics had little additional predictive benefit for spawning after the river reached spawning thresholds. The highest probability of spawning (0.48) was for the temperature interval 9.5-9.9°C, and 93% of the estimated spawning events occurred above 8°C. Sixty percent of the estimated spawning events occurred at discharges ‡600 m 3 s )1 , which comprised 45% of the range of discharge values.

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“…Other research has identified a severe bottleneck at the egg incubation stage (Paragamian and Wakkinen 2002). Significant numbers of fish are observed to spawn each year, and viability of embryos has been confirmed, but most spawning currently occurs over an unstable sand and silt substrate that is not conducive to survival Anders et al 2002;Kock et al 2006).…”

Section: Figmentioning

confidence: 99%

“…Natural recruitment began declining around 1960, and the last substantial year class was produced in the early 1970s (Andrusak 1980;Partridge 1983). Kootenai River white sturgeon continue to migrate upriver and spawn each year, but mortality of eggs and larvae is nearly absolute (Duke et al 1999;Paragamian and Wakkinen 2002). The wild population now consists of a dwindling cohort of large, old fish (Paragamian et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Evidence of density- and size-dependent mortality in hatchery-reared juvenile white sturgeon (Acipenser transmontanus) in the Kootenai River

Justice

Pyper

Beamesderfer

et al. 2009

Can. J. Fish. Aquat. Sci.

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We evaluated effects of stocking level and size-at-release on survival rates of hatchery-reared juvenile white sturgeon (Acipenser transmontanus) in the Kootenai River using Cormack-Jolly-Seber and related models implemented in Program MARK. A total of 119 768 marked and unmarked hatchery juveniles were released from 1992 to 2006, of which 2938 passive integrated transponder (PIT)-tagged fish were subsequently recaptured. Annual survival rates of marked groups ranged from 0.01 to 0.84 (mean = 0.45) during the first year at large, from 0.48 to 1.0 (mean = 0.84) in the second year, and averaged 1.0 during all subsequent years. First year survival rates declined substantially in recent years, particularly for small fish (<25 cm fork length). Approximately 59% of the variation in first year survival was explained by a negative relationship with estimated juvenile abundance (linear regression, P < 0.01). Length-at-release of individuals explained a substantial proportion of the within-year variation in survival during the first year at large. Our results provide strong evidence of density-and size-dependent mortality in hatchery-reared juvenile white sturgeon in the Kootenai River. Management actions that prioritize the release of fewer, larger-sized fish will likely improve first year survival rates and subsequent recruitment to the spawning-age population.Résumé : Nous évaluons les effets de l'intensité de l'empoissonnement et de la taille à la libération sur les taux de survie de jeunes esturgeons blancs (Acipenser transmontanus) de pisciculture dans la Kootenai à l'aide du modèle CormackJolly-Seber et de modèles apparentés utilisés dans le logiciel MARK. Un total de 119 768 jeunes de pisciculture marqués et non marqués ont été libérés de 1992 à 2006, dont 2 938 poissons porteurs d'étiquette PIT (à transpondeur intégré passif) ont été recapturés plus tard. Les taux de survie des groupes marqués variaient de 0,01-0,84 (moyenne = 0,45) durant la première année en liberté, de 0,48-1,0 (moyenne = 0,84) la seconde année et en moyenne de 1,0 durant toutes les années subséquentes. Les taux de survie durant la première année ont diminué considérablement au cours des dernières années, particulièrement chez les petits poissons (longueur à la fourche < 25 cm). Environ 59 % de la variation de la survie pendant la première année s'explique par une relation négative avec l'abondance estimée des jeunes (régression linéaire, P < 0,01). La longueur des individus à la libération explique une partie importante de la variation intra-annuelle dans la survie durant la première année de liberté. Nos résultats apportent de fortes indications de l'existence d'une mortalité reliée à la densité et à la taille chez les jeunes esturgeons blancs de pisciculture dans la Kootenai. Des activités de gestion qui favoriseraient la libération d'un nombre moins important de poissons de plus grande taille augmenteraient vraisemblablement les taux de survie pendant la première année et le recrutement subséquent dans la population en âge de frayer.[Tradui...

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Spawning locations and movement of Kootenai River white sturgeon

Cited by 53 publications

References 15 publications

Environmental and lunar cues are predictive of the timing of river entry and spawning‐site arrival in lake sturgeon Acipenser fulvescens

Environmental and lunar cues are predictive of the timing of river entry and spawning‐site arrival in lake sturgeon Acipenser fulvescens

White sturgeon spawning and discharge augmentation

Evidence of density- and size-dependent mortality in hatchery-reared juvenile white sturgeon (Acipenser transmontanus) in the Kootenai River

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