Freshwater movement patterns by juvenile Pacific salmon <i>Oncorhynchus</i> spp. before they migrate to the ocean: Oh the places you'll go!

Shrimpton, J. Mark; Warren, K.; Todd, N. L.; McRae, Crystal J.; Glova, G. J.; Telmer, Kevin; Clarke, AE

doi:10.1111/jfb.12468

Cited by 25 publications

(39 citation statements)

References 47 publications

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“…If imprinting does not occur until the PST, returning adults could use olfactory directional cues to locate their rearing lake, but would presumably require some other type of directional cues to find their natal stream. Similarly, coho and Chinook ( O. tshawytscha ) salmon often make extensive migrations from their natal site prior to the PST, suggesting imprinting may occur before this period3839.…”

Section: Discussionmentioning

confidence: 99%

Evidence of Olfactory Imprinting at an Early Life Stage in Pink Salmon (Oncorhynchus gorbuscha)

Bett

Hinch

Dittman

et al. 2016

Sci Rep

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Pacific salmon (Oncorhynchus spp.) navigate towards spawning grounds using olfactory cues they imprinted on as juveniles. The timing at which imprinting occurs has been studied extensively, and there is strong evidence that salmon imprint on their natal water during the parr-smolt transformation (PST). Researchers have noted, however, that the life histories of some species of Pacific salmon could necessitate imprinting prior to the PST. Juvenile pink salmon (O. gorbuscha) spend less time in fresh water than any other species of Pacific salmon, and presumably must imprint on their natal water at a very young age. The time at which imprinting occurs in this species, however, has not been experimentally tested. We exposed juvenile pink salmon as alevins to phenethyl alcohol (PEA) or control water, reared these fish to adulthood, and then tested their behavioural responses to PEA to determine whether the fish successfully imprinted. We found that pink salmon exposed to PEA as alevins were attracted to the chemical as adults, suggesting that imprinting can occur during this stage. Our finding provides some of the first evidence to support the long-standing belief that imprinting can occur in pink salmon prior to the PST.

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Section: Discussionmentioning

confidence: 99%

Evidence of Olfactory Imprinting at an Early Life Stage in Pink Salmon (Oncorhynchus gorbuscha)

Bett

Hinch

Dittman

et al. 2016

Sci Rep

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“…The timing of smolt migration for wild populations of Fraser River O. kisutch is poorly understood due to the complexity of the catchment and widespread distribution of populations. Additionally, there is evidence that juveniles will re‐distribute prior to smolting (Shrimpton et al ., ) making it difficult to determine population origin for wild‐migrating smolts. Environmental differences between coastal ( e.g .…”

Section: Methodsmentioning

confidence: 99%

Is the duration of the smolt window related to migration distance in coho salmon Oncorhynchus kisutch?

Elsner

Shrimpton

2018

Journal of Fish Biology

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Physiological changes during the parr-smolt transformation were investigated in short distance (Chilliwack River) and long-distance (Salmon River) migrating coho salmon Oncorhynchus kisutch populations in British Columbia, Canada. Biochemical and molecular indicators were used to monitor smolt development for fish reared at 10 °C throughout the spring. Fish grew well and developed the physical appearance of competent smolts. Both populations exhibited increases in gill Na -K -ATPase activity (NKA; an important indicator of seawater tolerance) at the same date and the duration of the increase in enzyme activity did not differ between populations. Gill messenger (m)RNA copies for two isoforms of the NKA α subunit, α1a and α1b, showed significant changes and the pattern was similar between populations. Growth hormone receptor and prolactin receptor mRNA from the gill showed modest changes associated with smolting in the spring for both populations, suggesting that these may not be useful indicators of smolt development in hatchery-reared O. kisutch. Consequently, the duration of the smolt window was not based on the region of origin in the present study.

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“…In this work we used Change-Point analysis (CPA) to facilitate the classification of individuals and quantify the number of changes in otolith elemental ratio (Shrimpton et al, 2014;Hegg et al, 2015). We assumed that significant changes in the transect corresponded with habitat changes due to chemical composition of the water (Freshwater et al, 2015;Hegg et al, 2015;Wynne et al, 2015).…”

Section: Determination Of Sr:ca Ratio By La-icp-ms Analysismentioning

confidence: 99%

“…The procedure used to perform a CPA comprises a combination of cumulative sum charts and boot strapping to identify shifts in the pattern of Sr:Ca. The analysis provides both confidence levels and confidence intervals for each change (95% confidence is used for all confidence intervals) and it is robust to issues of non-normality (Shrimpton et al, 2014). The Change-Point Analyzer 2.3 software package (Taylor, 2000) was used for CPA.…”

Section: Determination Of Sr:ca Ratio By La-icp-ms Analysismentioning

confidence: 99%

“…2): 1) freshwater resident: defined as permanence in freshwater throughout life and 2) freshwater straggler: defined as freshwater fish found in estuaries in low number and whose distribution is usually limited to the low salinity in upper reaches of estuaries. Following Walther et al (2011) and Shrimpton et al (2014), the variable "number of changes" was compared between locations (Uruguay and Paraná rivers) using the non-parametric Mann-Whitney U test because the response was not normally distributed with heterogeneous variance (Shapiro-Wilk, p <0.05; Levene, p <0.05), even after transformation log (x+1). Prior to parametric Mann-Whitney U test, we evaluated the association between the number of Sr:Ca changes and the fish age using Spearman correlation.…”

Section: Determination Of Sr:ca Ratio By La-icp-ms Analysismentioning

confidence: 99%

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Migration and brackish environment use of Prochilodus lineatus (Characiformes: Prochilodontidae) inferred by Sr:Ca ratio transects of otolith

et al. 2017

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The streaked prochilod, Prochilodus lineatus, represents the most important fishery in the La Plata Basin (South America). Our objective was to analyze brackish environment use by the streaked prochilod captured from Paraná and Uruguay rivers. To accomplish this, lapillus otolith sections were analyzed for Sr:Ca with laser ablation-inductively coupled plasma-mass spectrometry (LA ICP-MS) to infer habitat use of fish. To the interpretation of transects, a threshold that represents the transition between freshwater and brackish environments was calculated using the Sr:Ca ratio of the otolith edge of specimens captured in the first section of the La Plata Estuary (salinity ≥ 0.5 PSU). The percentage of fish using the estuary was higher in the Paraná (37%) than the Uruguay River (5%). Change-point analysis showed that fish entered the estuary between 1 and 3 times throughout life at a wide range of ages (0-15 years). These incursions had no obvious periodicity. This information should be integrated into future management actions, which should also be specific to each area since migration patterns differ between the major rivers of the basin.Keywords: Connectivity, Freshwater resident, Laser ablation, River migration, Streaked prochilod.El sábalo, Prochilodus lineatus, representa la pesquería más importante en la Cuenca del Río de la Plata (Sudamérica). Nuestro objetivo fue analizar el uso del hábitat estuarino del sábalo proveniente de los ríos Uruguay y Paraná. Para esto, se analizó la relación Sr:Ca en secciones de otolitos lapilli por ablación láser acoplada a espectrometría de masas con fuente de plasma de acoplamiento inductivo (LA ICP-MS) para inferir el uso de hábitat. Para interpretar las transectas, un umbral que representa la transición entre los ambientes de agua dulce y estuarino, fue calculado usando la relación Sr:Ca del borde del otolito de especímenes capturados en la primera sección del estuario del Plata (salinidad ≥0.5 UPS). El porcentaje de peces que usaron el estuario fue más elevado para el Paraná (37%) en relación al Uruguay (5%). El análisis de cambio puntual mostro que los individuos ingresan al estuario entre 1 a 3 veces a lo largo de la vida en un amplio rango de edades (0-15 años). Las incursiones no mostraron una periodicidad notoria. Esta información debería integrarse a futuras acciones de manejo que deberían ser específicas para cada área considerando los patrones de migración que difieren entre los grandes ríos de la Cuenca.Palabras clave: Ablación laser, Agua dulce residente, Conectividad, Migración de rio, Sábalo.

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Freshwater movement patterns by juvenile Pacific salmon Oncorhynchus spp. before they migrate to the ocean: Oh the places you'll go!

Cited by 25 publications

References 47 publications

Evidence of Olfactory Imprinting at an Early Life Stage in Pink Salmon (Oncorhynchus gorbuscha)

Evidence of Olfactory Imprinting at an Early Life Stage in Pink Salmon (Oncorhynchus gorbuscha)

Is the duration of the smolt window related to migration distance in coho salmon Oncorhynchus kisutch?

Migration and brackish environment use of Prochilodus lineatus (Characiformes: Prochilodontidae) inferred by Sr:Ca ratio transects of otolith

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