Life history variation within and among naturalized rainbow trout populations of the Laurentian Great Lakes

Johnston, Thomas A.; Prévost, Marión; Haslam, L.C.; Addison, Peter A.

doi:10.1016/j.jglr.2016.04.010

Cited by 7 publications

(10 citation statements)

References 73 publications

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“…The current study is one of the few to analyze multiple egg quality traitssize and lipid content -with respect to the combined effects of maternal age and size. A similar analysis in rainbow trout (Oncorhynchus mykiss) showed stronger ontogenetic patterns for egg size than egg lipid content, similar to lake trout, but also found that maternal size was a stronger predictor than age (Johnston et al 2016), opposite to the trend for lake trout. This latter result may reflect life history differences.…”

Section: Among-female Variation In Egg Characteristicsmentioning

confidence: 77%

“…Previously reported egg size vs latitude relationships for fish in the northern hemisphere have been negative (Fleming and Gross 1990;Beacham and Murray 1993;Johnston and Leggett 2002;Kokita 2003;Cott et al 2013), positive (Morita et al 2009, and non-significant (Power et al 2005;Johnston et al 2016). Numerous life history traits in fishes co-vary across latitudinal and climatic gradients (Blanck and Lamouroux 2007), and the particular mechanism leading to a latitudinal cline in egg quality, whether a direct environmental driver such as temperature or indirect mediation through other co-evolving traits, may vary among species.…”

Section: R a F Tmentioning

confidence: 96%

“…It may also depend on the choice of variable used to represent female condition. For example, egg size has been found to be negatively related to female condition based on liver indices (Moles et al 2008;Johnston et al 2016) but positively related to female condition based on whole body indices (Moles et al 2008). Finally, the effect of female condition on offspring quality may not be evident in egg size, but instead appear in post-hatch performance (Tierney et al 2009).…”

Section: Among-female Variation In Egg Characteristicsmentioning

confidence: 99%

“…Many teleosts also support valuable fisheries, and research on their life histories has improved our D r a f t understanding of recruitment variability and population dynamics (Jennings et al 1998;Winemiller 2005;Green 2008). Most teleosts are oviparous and offspring size is determined by the maternal effect of ova (egg) size which exhibits considerable intraspecific variation both within and among populations of freshwater and marine species (Bagenal 1971;Kjørsvik et al 1990; Chambers and Leggett 1996;Brooks et al 1997;Heath and Blouw 1998;Johnston and Leggett 2002;Kamler 2005;Johnston et al 2016). Offspring size, in turn, has a strong influence on early life survival in fishes (Miller et al 1988).…”

Section: Introductionmentioning

confidence: 99%

“…At a shorter temporal scale, resources must be divided among maintenance, growth, energy storage, and reproduction within each reproductive cycle. Thus, reproductive allocation, including the quality of eggs produced, could be related to the nutritional status of the female, though evidence for this remains limited (Lambert et al 2000;Moles et al 2008;Muir et al 2014;Johnston et al 2016). At present, the mechanisms behind ontogenetic relationships in egg quality, and the additional role of short-term shifts in female condition, remain poorly understood.…”

Section: Introductionmentioning

confidence: 99%

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Egg size and lipid content of lake trout (Salvelinus namaycush) in the wild and in captivity

Johnston

2018

Can. J. Fish. Aquat. Sci.

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Egg quality influences early life survival in fishes, but drivers of egg quality variation remain poorly understood. I examined egg quality of a long-lived, iteroparous salmonid (lake trout (Salvelinus namaycush)) with respect to maternal traits and environmental conditions in wild and captively reared populations. Variation was stronger and more consistent for egg size than for lipid content. Among females, egg size was most strongly related to maternal age, in both wild and captive populations, and faster-growing females tended to produce larger eggs. Among wild populations, maternal growth was more strongly associated with indices of ecosystem size or productivity than climate, whereas the opposite was observed for egg size. Egg size and, to a lesser extent, maternal growth in captive populations were positively correlated with egg size and growth, respectively, in their wild source populations. However, captive females grew faster and produced larger eggs at age, but smaller eggs at length, than their wild counterparts. Lake trout egg quality variation has both maternal and environmental components, and captive rearing appears to alter the ontogenetic progression of egg size.

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Section: Among-female Variation In Egg Characteristicsmentioning

confidence: 77%

Section: R a F Tmentioning

confidence: 96%

Section: Among-female Variation In Egg Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Egg size and lipid content of lake trout (Salvelinus namaycush) in the wild and in captivity

Johnston

2018

Can. J. Fish. Aquat. Sci.

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Spawning interactions between hatchery‐reared and wild naturalized rainbow trout (Oncorhynchus mykiss, Walbaum, 1792) in high‐altitude tropical streams, Kenya

Njue,

Ngugi,

Muchiri

et al. 2023

Aquaculture Fish & Fisheries

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Rainbow trout (Oncorhynchus mykiss) is among the most widely translocated fish species in the world. The current study evaluated the spawning interactions between naturalized and wild rainbow trout from two high‐altitude second‐order streams, in Kenya. Data on total length, weight, condition factor, fecundity, fertilization, egg diameter and fry survival were collected on spawning rainbow trout between March and December 2021. Length–weight relationship showed parabolic equations as W = 0.0144L2.900, W = 0.0069L3.0285 and W = 0.00027L3.175 for wild fish stock, hatchery‐reared and wild × hatchery‐reared rainbow trout, respectively. Total fecundity differed significantly among the hatchery‐reared, wild fish and the cross of the two (p < 0.05). The fertilization rate showed significant differences (p < 0.05), with no discernable difference observed between the hatchery‐reared and crossed (wild × hatchery‐reared). There was a positive correlation among the total fecundity to female egg weight, female body weight, fertilization rate and eyed egg survival in all the populations. Relative fecundity was significantly different among the three groups of fish (p < 0.05), but the differences between the hatchery and the crossed (wild × hatchery‐reared) fish showed no significant differences. We recommend the use of crossed (wild × hatchery‐reared) populations for fry production for use in aquaculture as they presented the highest fecundity and gave the best outcome of fry with high survival.

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Egg size–related traits during the first year of growth and smolting in hatchery and wild juveniles of steelhead trout Oncorhynchus mykiss

et al. 2022

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Life history variation within and among naturalized rainbow trout populations of the Laurentian Great Lakes

Cited by 7 publications

References 73 publications

Egg size and lipid content of lake trout (Salvelinus namaycush) in the wild and in captivity

Egg size and lipid content of lake trout (Salvelinus namaycush) in the wild and in captivity

Spawning interactions between hatchery‐reared and wild naturalized rainbow trout (Oncorhynchus mykiss, Walbaum, 1792) in high‐altitude tropical streams, Kenya

Egg size–related traits during the first year of growth and smolting in hatchery and wild juveniles of steelhead trout Oncorhynchus mykiss

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