Interpopulation variation in reproductive traits of female masu salmon, <i>Oncorhynchus masou</i>

Tamate, Tsuyoshi; Maekawa, Koji

doi:10.1034/j.1600-0706.2000.900201.x

Cited by 63 publications

(73 citation statements)

References 39 publications

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“…Because fecundity (n) is assumed to be equivalent to R/z, the optimal strategy changes z to maximize R/z and therefore, a reduction in growth will lead to an increase in optimal propagule size. Tamate and Maekawa (2000) showed that adverse conditions (e.g. low resource availability) may also directly influence R, assuming that the effect of lower reproductive investment is analogous to that of low growth conditions in the model of Sibly et al (1988), and will therefore result in an identical change in optimal propagule size as for low growth conditions.…”

Section: Introductionmentioning

confidence: 97%

“…Models of life history theory predict that in low-growth and/or low-reproduction environments, the release of larger but fewer offspring will be favoured (Sibly and Calow 1986;Lloyd 1987;McGingley et al 1987;Stearns 1992;Tamate and Maekawa 2000). The optimal egg size and number of offspring that individuals of a population will produce, depend on the balance between the production of larger eggs, which in general survive better, mature earlier and develop faster (review in Fox and Czesak 2000) and the production of smaller eggs, which results in a higher fecundity (Bernardo 1996).…”

Section: Introductionmentioning

confidence: 99%

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Adaptive reproductive variation along a pollution gradient in a wolf spider

Hendrickx

Maelfait²,

Speelmans

et al. 2003

Oecologia

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When populations are exposed to environmental pollutants, growth and reproduction might be strongly reduced due to an increased detoxification effort. Sublethal metal pollution is therefore to be expected to cause the same selection pressure as a low resource habitat and might alter the reproductive strategy. Optimality models of life history theory predict that when resource availability is reduced, growth and reproductive output are reduced and that the release of fewer but larger propagules will be favoured. This was tested by applying a life history model to reproductive trait measurements in six populations of the wolf spider Pirata piraticus in which the assumptions of the model are satisfied. Internal Cd, Cu and Zn body burden were strongly correlated with each other, and differed strongly between the populations, indicating consistently differing metal exposure at the different sites. Pb levels were extremely variable within each population and did not differ between the populations. Females from populations with high concentrations of the first three heavy metals showed a strongly reduced reproductive output and fecundity, indicating a high reduction in resource availability due to detoxification processes. Egg size in contrast was negatively correlated with fecundity and reproductive output and as a consequence positively related with internal metal burden. Our results are thus in strong agreement with the predictions of the optimality models and confirm the benefits of a larger propagule size when resource availability is reduced.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Adaptive reproductive variation along a pollution gradient in a wolf spider

Hendrickx

Maelfait²,

Speelmans

et al. 2003

Oecologia

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“…1). The first strategy appears to be common among ectotherms because females in colder environments tend to produce larger eggs (Perrin 1988;Iguchi and Yamaguchi 1994;Glazier 1999;Ernsting and Isaaka 2000;Tamate and Maekawa 2000;Kim and Thorpe 2001; reviewed by Atkinson et al 2001). Moreover, selection experiments involving Drosophila melanogaster have been used to link the evolution of large eggs directly to low environmental temperature (Azevedo et al 1996).…”

mentioning

confidence: 99%

CONVERGENT EVOLUTION OF EMBRYONIC GROWTH AND DEVELOPMENT IN THE EASTERN FENCE LIZARD (SCELOPORUS UNDULATUS)

Oufiero

Angilletta

2006

Evolution

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Abstract. Theory predicts that cold environments will select for strategies that enhance the growth of ectotherms, such as early emergence from nests and more efficient use of resources. We used a common garden experiment to detect parallel clines in rates of embryonic growth and development by eastern fence lizards (Sceloporus undulatus). Using realistic thermal conditions, we measured growth efficiencies and incubation periods of lizards from five populations representing two distinct clades. In both clades, embryos from cold environments (Indiana, New Jersey, and Virginia) grew more efficiently and hatched earlier than embryos from warm environments (Florida and South Carolina). Because eggs from cold environments were larger than eggs from warm environments, we experimentally miniaturized eggs from one population (Virginia) to determine whether rapid growth and development were caused by a greater maternal investment. Embryos in miniaturized eggs grew as efficiently and incubated for the same duration as embryos in unmanipulated eggs. Taken together, our results suggest countergradient variation has evolved at least twice in S. undulatus.

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“…Crossin et al (2004) reported that egg size was reduced in sockeye populations performing particularly energydemanding migrations, and Braun et al (2013) reported that in years of energetically demanding migration conditions, female sockeye salmon produced smaller eggs for their size than in years when conditions were more benign. Jonsson et al (1996) reported that Atlantic salmon egg size changes with juvenile growth rate, and similar relationships have been reported for some other salmonids (Morita et al 1999, Tamate & Maekawa 2000, but not for brown trout Salmo trutta (Jonsson & Jonsson 1999) or some Pacific salmonids Oncorhynchus spp. (Quinn et al 2004(Quinn et al , 2011.…”

Section: Discussionmentioning

confidence: 56%

Linking embryonic temperature with adult reproductive investment in Atlantic salmon Salmo salar

Jönsson¹,

Jönsson²,

Finstad³

2014

Mar. Ecol. Prog. Ser.

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The expression of fitness-related traits, such as egg and gonad size, often varies among habitats and exhibits clinal variation along climatic and latitudinal gradients. However, the mechanisms allowing such variations are obscure and have been ascribed to both phenotypic plasticity and genetic adaptation. We experimentally tested whether variation in egg and gonad size of a poikilotherm vertebrate is influenced by the temperature individuals experienced during embryogenesis, possibly as an epigenetic effect. Atlantic salmon Salmo salar eggs were incubated under 3 embryonic thermal regimes: cold, mixed and warm treatments. The cold group received ambient river water (mean ± SD: 2.6 ± 0.4°C) and the warm group received water at 4.6°C above ambient temperature, the expected temperature in the river towards the end of this century, from fertilization until exogenous feeding commenced. The mixed group received ambient river water until hatching, whereupon the larvae received heated water until exogenous feeding commenced. When exogenous feeding was initiated, all fish were reared under identical, natural thermal conditions. At adulthood, fish that developed from warm-incubated eggs were largest, had the highest mass−length relationship and developed larger eggs and higher gonad mass relative to their own body size. There was no similar effect of thermal environment during larval development. The treatment did not affect age of maturity or fecundity. Thus, thermal conditions during embryogenesis affected the expression of adult life-history traits, a mechanism by which fish may rapidly change the size of their propagules to the anticipated thermal offspring environment. This is a novel result explaining variation in these core life-history traits.

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Interpopulation variation in reproductive traits of female masu salmon, Oncorhynchus masou

Cited by 63 publications

References 39 publications

Adaptive reproductive variation along a pollution gradient in a wolf spider

Adaptive reproductive variation along a pollution gradient in a wolf spider

CONVERGENT EVOLUTION OF EMBRYONIC GROWTH AND DEVELOPMENT IN THE EASTERN FENCE LIZARD (SCELOPORUS UNDULATUS)

Linking embryonic temperature with adult reproductive investment in Atlantic salmon Salmo salar

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