Differential response of continental stock complexes of Atlantic salmon (Salmo salar) to the Atlantic Multidecadal Oscillation

Friedland, Kevin D.; Shank, Burton; Todd, Christopher; McGinnity, P.; Nye, Janet A.

doi:10.1016/j.jmarsys.2013.03.003

Cited by 71 publications

(92 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Keogh River smolt survival was most correlated with growth rates in July through December of their postsmolt year. Growth during this period also appears to be very important for Atlantic salmon (Salmo salar) smolt survival in the ocean (Friedland et al 2014a).…”

Section: Discussionmentioning

confidence: 99%

“…However, steelhead populations appear to have declined in abundance over time throughout much of the southern part of their range (Busby et al 1996), and there are specific concerns about the viability of populations in various regions, especially Puget Sound (NMFS 2006(NMFS , 2007Berejikian et al 2016;Ford 2011;Gayeski et al 2011;Moore et al 2015).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Declining patterns of Pacific Northwest steelhead trout (Oncorhynchus mykiss) adult abundance and smolt survival in the ocean

Kendall

Marston

Klungle

2017

Can. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

Examination of population abundance and survival trends over space and time can guide management and conservation actions with information about the spatial and temporal scale of factors affecting them. Here, we analyzed steelhead trout (anadromous Oncorhynchus mykiss) adult abundance time series from 35 coastal British Columbia and Washington populations along with smolt-to-adult return (smolt survival) time series from 48 populations from Washington, Oregon, and the Keogh River in British Columbia. Over 80% of the populations have declined in abundance since 1980. A multivariate autoregressive statespace model revealed smolt survival four groupings: Washington and Oregon coast, lower Columbia River, Strait of Juan de Fuca, and Puget Sound -Keogh River populations. Declines in smolt survival rates were seen for three of the four groupings. Puget Sound and Keogh River populations have experienced low rates since the early 1990s. Correlations between population pairs' time series and distance apart illustrated that smolt survival rates were more positively correlated for proximate populations, suggesting that important processes, including those related to ocean survival, occur early in the marine life of steelhead. Les populations du Puget Sound et de la rivière Keogh présentent de faibles taux de survie depuis le début des années 1990. Les corrélations entre les séries chronologiques de paires de populations et les distances les séparant illustrent le fait que les taux de survie des saumoneaux montrent de plus fortes corrélations positives pour les populations rapprochées, ce qui porte à croire que des processus importants, dont les processus associés à la survie en mer, s'exercent au début de la vie en mer des truites arc-en-ciel anadromes. [Traduit par la Rédaction]

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Declining patterns of Pacific Northwest steelhead trout (Oncorhynchus mykiss) adult abundance and smolt survival in the ocean

Kendall

Marston

Klungle

2017

Can. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

show abstract

“…Variations in marine survival of salmon have been associated with climate-related changes in the extent of thermal habitat (e.g. Jonsson & Jonsson 2004, Friedland et al 2014) and availability of pelagic prey (e.g. Friedland et al 2009, Beaugrand & Reid 2012.…”

Section: Discussionmentioning

confidence: 99%

Temporal variation in sea trout Salmo trutta life history traits in the Erriff River, western Ireland

Gargan¹,

Kelly²,

Shephard³

et al. 2016

Aquacult. Environ. Interact.

View full text Add to dashboard Cite

The demographic and life history characteristics of sea trout Salmo trutta L. populations can be changed by a range of pressures in both freshwater and marine environments. Few long-term monitoring programmes are in place to assess temporal change in population dynamics. We analysed a 20 yr time series (1985−2004) using 15 sea trout population response variables in the Erriff River, western Ireland. Over this period, when time was considered as a categorical variable comprising 4 sequential periods of 5 yr, important life history changes were observed. The most dramatic of these changes corresponded with the period immediately after the commencement of salmon farming in the local estuary, with significant decreases in the number and length of sea trout kelts, the estimated number of eggs deposited, the sea trout rod catch, the proportion of older (1+ and 2+ sea age) fish and the frequency of repeat spawners. We found a significant positive relationship between the number of salmon lice Lepeophtheirus salmonis in the local salmon farm and the number of lice found on sea trout collected contemporaneously in local rivers. Results of this long-term monitoring programme demonstrate that significant changes in sea trout population structure with respect to quantitative life history traits can occur over a relatively short time period and suggest that the introduction of salmon farming into the local estuary most likely contributed to the observed changes in sea trout population dynamics.

show abstract

“…Finally, the ability to place a date on each circulus would permit the back-calculation of length and the estimation of specific growth rate history in known months for individuals throughout their marine migration. Understanding the interplay between size, growth, and mortality has been a focus of much research into time-series variability in salmon populations (e.g., Friedland et al 1993Friedland et al , 2013Moss et al 2005;McCarthy et al 2008), and there now is a wealth of evidence concerning their likely impacts on adult recruitment and abundance (Jonsson et al 2003;Jonsson 2004, 2007;Hogan and Friedland 2010;Jensen et al 2011Jensen et al , 2012Otero et al 2011). But these past studies have necessarily centred on size at age and size-related mortality rather than variation or changes in specific growth rate at known times during the marine migration.…”

Section: Indirect Validation Of the Dating Methodologymentioning

confidence: 99%

A simple method of dating marine growth circuli on scales of wild one sea-winter and two sea-winter Atlantic salmon (Salmo salar)

Todd

Whyte

MacLean

et al. 2014

Can. J. Fish. Aquat. Sci.

Self Cite

View full text Add to dashboard Cite

A method of dating the marine growth circuli on Atlantic salmon (Salmo salar L.) scales is presented. Data were available for 54 salmon, intercepted as smolts at the completion of their downstream migration in the River North Esk, Scotland.Smolts were tagged, released, and recaptured as return adults after either one (1SW) or two (2SW) winters at sea. Dating of circuli was achieved by fitting a simple quadratic model to the circuli pertaining to fixed points on the scale. For 1SW fish, the latter were the dates of river emigration and completion of marine migration, and the midpoint circulus (equal to the winter solstice) of the winter annulus. For 2SW salmon, these were the date of emigration and the two winter annulus midpoints. A key assumption is that winter annulus formation arises from constraints of light availability on foraging, and hence, reduced growth rate.Comparative analyses indicate the method to be robust and effectively transferable to salmon of known capture date -but of unknown smolt emigration date -by assuming a fixed date of emigration; in such cases, circuli could still be allocated with confidence to a calendar month.Résumé : Une méthode de datation des stries de croissance en mer sur les écailles de saumon atlantique (Salmo salar L.) est décrite. Des données étaient disponibles pour 54 saumons interceptés au stade de saumoneau à la fin de leur avalaison dans la rivière North Esk, en Écosse. Les saumoneaux ont été marqués, relâchés, puis repris en tant qu'adultes à leur retour après un (1SW) ou deux (2SW) hivers en mer. La datation des stries a été effectuée en calant un modèle quadratique simple sur les stries reliées à des points fixes sur l'écaille. Pour les poissons 1SW, ces points étaient les dates de l'émigration de la rivière et de la fin de la migration marine, ainsi que la strie médiane (égal au solstice d'hiver) de l'anneau hivernal. Pour les saumons 2SW, il s'agissait de la date d'émigration de la rivière et des stries médianes des deux anneaux hivernaux. La méthode repose notamment sur l'hypothèse voulant que la formation des anneaux hivernaux soit causée par des restrictions à l'alimentation associées à la lumière disponible et, donc, à une réduction du taux de croissance. L'analyse comparative indique que la méthode est robuste et peut être appliquée avec succès à des saumons dont la date de capture est connue (mais dont la date d'émigration en tant que saumoneaux est inconnue) en postulant une date d'émigration fixe; dans ces cas, les stries peuvent quand même être affectées avec confiance à un mois précis. [Traduit par la Rédaction]

show abstract

Differential response of continental stock complexes of Atlantic salmon (Salmo salar) to the Atlantic Multidecadal Oscillation

Cited by 71 publications

References 66 publications

Declining patterns of Pacific Northwest steelhead trout (Oncorhynchus mykiss) adult abundance and smolt survival in the ocean

Declining patterns of Pacific Northwest steelhead trout (Oncorhynchus mykiss) adult abundance and smolt survival in the ocean

Temporal variation in sea trout Salmo trutta life history traits in the Erriff River, western Ireland

A simple method of dating marine growth circuli on scales of wild one sea-winter and two sea-winter Atlantic salmon (Salmo salar)

Contact Info

Product

Resources

About