Otolith microchemistry reveals partial migration and life history variation in a facultatively anadromous, iteroparous salmonid, bull trout (Salvelinus confluentus)

Austin, Catherine S.; Bond, Morgan H.; Smith, Joseph M.; Lowery, Erin D.; Quinn, Thomas P.

doi:10.1007/s10641-019-0848-1

Cited by 18 publications

(20 citation statements)

References 59 publications

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“…Given the evidence established in this study, partial anadromy, defined as a mix of both saltwater and freshwater contingents, may best describe life history diversity on PEI, as has been reported in other salmonid populations (Chapman et al 2012;Kendall et al 2015;Austin et al 2019). The cohort of rainbow trout on PEI that used the fully anadromous life history achieved sizes (up to 650 mm) similar to anadromous trout in their native range without extended residence in marine waters (Howell et al 1985).…”

Section: Life History Statusmentioning

confidence: 58%

“…Following Magath et al (2013), the Sr:Ca values were binned into three migratory contingents where all measured values fell within predetermined ranges. Sr:Ca < 1 mmol•mol -1 throughout the whole line scan were assigned to the freshwater contingent (Austin et al 2019); Sr:Ca between 1 and 3.5 mmol•mol -1 was the tidal contingent; and Sr:Ca values > 3.5 mmol•mol -1 were the estuary contingent. The tidal cut-off of 3.5 mmol•mol -1 has been previously used to establish anadromy in invasive rainbow trout in Gulf of St. Lawrence watersheds (Thibault et al 2010).…”

Section: Otolith Analysismentioning

confidence: 99%

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Otolith microchemistry and acoustic telemetry reveal anadromy in non-native rainbow trout (Oncorhynchus mykiss) in Prince Edward Island, Canada

Roloson

Landsman

Tana

et al. 2020

Can. J. Fish. Aquat. Sci.

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This study examined the migratory patterns of introduced rainbow trout (Oncorhynchus mykiss) in three rivers in Prince Edward Island, Canada, using acoustic telemetry and otolith microchemistry. Only 6% of acoustically tagged fish in three river systems left coastal embayments. A cohort of rainbow trout in all three rivers entered saline waters. Habitat use differed among migrants in the three rivers, as Montague River fish occupied estuary habitat (mean 20.79 PSU) more often than West River and Dunk River fish that tended to occupy both riverine tidal (mean 1.27 and 4.29 PSU, respectively) and freshwater habitats (<0.5 PSU), particularly during summer months (July and August). A second cohort of rainbow trout remained exclusively in fresh water. Migratory individuals were more likely to arise from anadromous mothers, but freshwater mothers produced migratory offspring in all sites. Migratory individuals were significantly larger than nonmigratory freshwater residents. This study suggests that partial residency was the primary strategy, with prominent tidal occupation, while secondary marine and freshwater contingents were included in the full range of successful migratory strategies.

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Section: Life History Statusmentioning

confidence: 58%

Section: Otolith Analysismentioning

confidence: 99%

Otolith microchemistry and acoustic telemetry reveal anadromy in non-native rainbow trout (Oncorhynchus mykiss) in Prince Edward Island, Canada

Roloson

Landsman

Tana

et al. 2020

Can. J. Fish. Aquat. Sci.

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show abstract

“…As Brenkman and Corbett (2005) pointed out, the timing of migration greatly affects vulnerability of bull trout to commercial fisheries if they use gillnets, which target salmon of similar body size. Likewise, bull trout in Washington's populations display partial anadromy, with variable proportions migrating to sea (Brenkman et al 2007;Ogg et al 2008;Austin et al 2019a), which also greatly influences their exposure to fisheries.…”

Section: Discussionmentioning

confidence: 99%

The timing of anadromous bull trout migrations in estuarine and marine waters of Puget Sound, Washington

et al. 2021

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of traps and beach seining to capture juveniles and adults, and acoustic telemetry to quantify movements in river, estuary, and marine waters. The period of marine residence overlapped among fish from different river basins and was generally brief; most bull trout entered marine waters from April to June and migrated back into rivers by July and August as temperatures were increasing, despite the increasing availability of prey fishes. The timing of return migration upriver occurred earlier in rivers with warmer temperatures than in cooler rivers, such that the fish entered at similar temperatures but different dates. However, the trapping and acoustic tag detections indicated that some exceptions occur, as individuals were in marine waters at times of the year when most of their populations were upriver. These timing patterns and other complex migration pathways and life history patterns indicated by the combination of sampling techniques, revealed the diversity in migratory behavior in this species, and the connections to the region's abiotic and biotic conditions.

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“…A considerable amount of fundamental research has been conducted to understand the mechanisms driving partial migration in different fish species ( e.g ., Brodersen et al ., 2008, 2019; Hendry et al ., 2004; Jonsson & Jonsson, 1993). Far less is known about the population‐level proportions of resident and migratory individuals at different spatio‐temporal scales ( e.g ., Austin et al ., 2019; Kerr & Secor, 2012; Svirgsden et al ., 2018) and almost nothing is known about the absolute or relative contribution of resident individuals to the migratory contingent (and vice versa ) (but see Zimmerman et al ., 2009; Courter et al ., 2013). The latter could be important for population persistence and resilience if significant resident contingent contribution to migratory contingent occurs.…”

Section: Figurementioning

confidence: 99%

Quantifying an overlooked aspect of partial migration using otolith microchemistry

Rohtla

Matetski

Taal

et al. 2020

Journal of Fish Biology

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For the first time, an overlooked aspect of partial migration was quantified using otolith microchemistry and brown trout, Salmo trutta, as a model species. Relative contributions of freshwater resident and anadromous female brown trout to mixed-stock sea trout populations in the Baltic Sea were estimated. Out of 236 confirmed wild sea trout sampled around the coast of Estonia 88% were of anadromous maternal origin and 12% were of resident maternal origin. This novel finding underscores the importance of the resident contingent in maintaining the persistence and resilience of the migratory contingent.

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Otolith microchemistry reveals partial migration and life history variation in a facultatively anadromous, iteroparous salmonid, bull trout (Salvelinus confluentus)

Cited by 18 publications

References 59 publications

Otolith microchemistry and acoustic telemetry reveal anadromy in non-native rainbow trout (Oncorhynchus mykiss) in Prince Edward Island, Canada

Otolith microchemistry and acoustic telemetry reveal anadromy in non-native rainbow trout (Oncorhynchus mykiss) in Prince Edward Island, Canada

The timing of anadromous bull trout migrations in estuarine and marine waters of Puget Sound, Washington

Quantifying an overlooked aspect of partial migration using otolith microchemistry

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