Spawning and rearing behavior of bull trout in a headwater lake ecosystem

Tennant, Lora B.; Gresswell, Robert E.; Guy, Christopher S.; Meeuwig, Michael H.

doi:10.1007/s10641-015-0461-x

Cited by 3 publications

(4 citation statements)

References 36 publications

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“…; Tennant et al. ). Conversely, upstream migration of fluvial Bull Trout typically occurs as spring discharges decrease and water temperatures increase (Swanberg ; Starcevich et al.…”

Section: Discussionmentioning

confidence: 98%

“…ADFLUVIAL BULL TROUT DEMOGRAPHICS AND LIFE HISTORY Salmonid spawning migrations can be driven by a variety of attributes (Northcote 1997), and Bull Trout spawning migrations are commonly associated with thermal and hydrologic conditions. For example, upstream spawning migrations have been linked with cooling water temperatures and increases in discharge for adfluvial populations (Brenkman et al 2001;Tennant et al 2016). Conversely, upstream migration of fluvial Bull Trout typically occurs as spring discharges decrease and water temperatures increase (Swanberg 1997;Starcevich et al 2012;Howell et al 2016).…”

Section: Sexual Maturity and Spawning Behaviormentioning

confidence: 99%

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New Insights into the Ecology of Adfluvial Bull Trout and the Population Response to the Endangered Species Act in the North Fork Lewis River, Washington

Al‐Chokhachy

Doyle²,

Lamperth

2019

Trans Am Fish Soc

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Like many other salmonids, Bull Trout Salvelinus confluentus migratory life history expressions are becoming increasingly rare. A critical step in effectively refining management and conservation strategies is a robust assessment of the effectiveness of such strategies and key biological information used in monitoring and recovery planning. To address this need, we integrated long‐term monitoring data to evaluate how the demographics (abundance) and vital rates (survival) of a Bull Trout population shifted in response to their listing under the Endangered Species Act (1998). In addition, we employed mark–recapture data to investigate Bull Trout population dynamics and assessed the life history characteristics (aging, growth, spawning migrations, and iteroparity) to improve our understanding of Bull Trout ecology and diversity. Our abundance and survival data, which extends to the early 1990s, illustrated positive responses in survival and abundance following the protection of Bull Trout under the Endangered Species Act. Over this period, we found high interannual variability in both survival and abundance, and adult survival (average = 0.45; SE = 0.04) was surprisingly lower than that of subadult individuals (average = 0.66; SE = 0.04), suggesting limitations at this important life stage. Our mark–recapture data also suggested that the attributes driving the Bull Trout population trend (i.e., recruitment to the adult stage or adult survival) has varied through time, with declining trends in the relative contribution of recruitment. Bull Trout spawning migrations varied with body size, and a considerable portion of smaller adults (<650 mm) did not spawn each year. Additionally, most spawning individuals made only one spawning migration, while <13% made three or more spawning migrations. Our results provide important insights into the effectiveness of the Endangered Species Act listing and new information regarding the life history patterns of adfluvial Bull Trout and can serve as a template to consider factors potentially limiting this and other native salmonid populations.

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“…; Tennant et al. ). Conversely, upstream migration of fluvial Bull Trout typically occurs as spring discharges decrease and water temperatures increase (Swanberg ; Starcevich et al.…”

Section: Discussionmentioning

confidence: 98%

Section: Sexual Maturity and Spawning Behaviormentioning

confidence: 99%

New Insights into the Ecology of Adfluvial Bull Trout and the Population Response to the Endangered Species Act in the North Fork Lewis River, Washington

Al‐Chokhachy

Doyle²,

Lamperth

2019

Trans Am Fish Soc

View full text Add to dashboard Cite

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“…Adfluvial populations of trout are often highly susceptible to environmental perturbations and are of conservation concern (Tennant et al. 2016; Simmons et al. 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Our study is the first of its kind to provide information on the population rate functions of adfluvial BCT and assess the potential effects of harvest on a wild population of BCT. Adfluvial populations of trout are often highly susceptible to environmental perturbations and are of conservation concern (Tennant et al 2016;Simmons et al 2020). For example, many migratory populations of Yellowstone Cutthroat Trout have declined while resident populations have generally persisted (Gresswell 2011; Kaeding and Koel 2011).…”

Section: Discussionmentioning

confidence: 99%

Population Dynamics and Harvest Management of the Bonneville Cutthroat Trout Fishery in Bear Lake, Idaho–Utah

Heller

Dillon

Tolentino

et al. 2022

N American J Fish Manag

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Land-use disturbances and associated losses in habitat quantity and quality negatively affected the Bonneville Cutthroat Trout (BCT) Oncorhynchus clarkii utah population in Bear Lake, Idaho-Utah, in the early 1900s. Bear Lake BCT follow an adfluvial life history strategy, and without access to suitable spawning habitat, the population of wild BCT was nearly extirpated by the early 1950s. In response to this decline, supplementation of the population with hatchery BCT began in 1973. Production of wild BCT was minimal until conservation efforts shifted towards improving fish habitat and access to spawning tributaries. In 2002, only 5% of the population consisted of wild fish; by 2017, nearly 70% of BCT in annual population surveys were wild. As a result, rule changes have been proposed to allow for regulated harvest of wild BCT. However, gaining a comprehensive understanding of the population dynamics of BCT in Bear Lake is critical before changes are made to management of the fishery. The objectives of this study were to describe the population dynamics of wild and hatchery BCT in Bear Lake and evaluate different management options. We evaluated population demographics of hatchery and wild BCT in Bear Lake and used age-structured population models to assess a variety of management scenarios associated with wild fish harvest regulations (e.g., bag limits). Bonneville Cutthroat Trout grew at relatively fast rates, and females began to mature at age 5. We observed considerable differences in the length and age structure of the hatchery population (i.e., exploited) versus the wild population (i.e., unexploited) of BCT. In general, BCT in Bear Lake were larger and older than Cutthroat Trout O. clarkii in other systems. The current rate of exploitation for hatchery BCT was estimated as 0.27 (i.e., two-fish daily limit). If

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Seasonal timing of reproductive migrations in adfluvial bull trout: an assessment of sex, spawning experience, population density, and environmental factors

Sinnatamby

Pinto

Johnston

et al. 2018

Can. J. Fish. Aquat. Sci.

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Using individual tags combined with a fish fence operated at the mouth of Smith-Dorrien Creek, the primary spawning habitat for Lower Kananaskis Lake bull trout (Salvelinus confluentus), we approximated a complete census of the spawning population from 1996 to 2000 to assess whether timing of upstream and downstream spawning migrations varied with extrinsic and intrinsic factors. The timing of both upstream and downstream migrations varied with sex, previous spawning experience, density, and temperature. Inferred spawning duration based on the predicted upstream and downstream migration dates indicated that experienced female spawners spent the least amount of time upstream and first-time spawners spent the most time upstream. No consistent differences in upstream migration timing were observed between non-repetitive and repetitive spawners. We suggest that variations in spawning migration timing observed in Lower Kananaskis Lake may be linked to environmental factors that influence upstream swimming ability and acquisition and expenditure of energy with respect to reproduction.

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Spawning and rearing behavior of bull trout in a headwater lake ecosystem

Cited by 3 publications

References 36 publications

New Insights into the Ecology of Adfluvial Bull Trout and the Population Response to the Endangered Species Act in the North Fork Lewis River, Washington

New Insights into the Ecology of Adfluvial Bull Trout and the Population Response to the Endangered Species Act in the North Fork Lewis River, Washington

Population Dynamics and Harvest Management of the Bonneville Cutthroat Trout Fishery in Bear Lake, Idaho–Utah

Seasonal timing of reproductive migrations in adfluvial bull trout: an assessment of sex, spawning experience, population density, and environmental factors

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