scholarly journals The effects of age at mating on female life-history traits in a seed beetle

2007 ◽  
Vol 18 (3) ◽  
pp. 551-555 ◽  
Author(s):  
Alexei A. Maklakov ◽  
Natacha Kremer ◽  
Göran Arnqvist
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Seed Beetle ◽  
Female Life History

scholarly journals The influence of mitonuclear genetic variation on personality in seed beetles

2014 ◽  
Vol 281 (1796) ◽  
pp. 20141039 ◽  
Author(s):  
Hanne Løvlie ◽  
Elina Immonen ◽  
Emil Gustavsson ◽  
Erem Kazancioğlu ◽  
Göran Arnqvist
Keyword(s):  
Genetic Variation ◽  
Life History ◽  
Life History Traits ◽  
Mitochondrial Genomes ◽  
Epistatic Interactions ◽  
Seed Beetle ◽  
Composite Measures ◽  
Behavioural Types ◽  
Individual Consistency ◽  
Seed Beetles

There is a growing awareness of the influence of mitochondrial genetic variation on life-history phenotypes, particularly via epistatic interactions with nuclear genes. Owing to their direct effect on traits such as metabolic and growth rates, mitonuclear interactions may also affect variation in behavioural types or personalities (i.e. behavioural variation that is consistent within individuals, but differs among individuals). However, this possibility is largely unexplored. We used mitonuclear introgression lines, where three mitochondrial genomes were introgressed into three nuclear genetic backgrounds, to disentangle genetic effects on behavioural variation in a seed beetle. We found within-individual consistency in a suite of activity-related behaviours, providing evidence for variation in personality. Composite measures of overall activity of individuals in behavioural assays were influenced by both nuclear genetic variation and by the interaction between nuclear and mitochondrial genomes. More importantly, the degree of expression of behavioural and life-history phenotypes was correlated and mitonuclear genetic variation affected expression of these concerted phenotypes. These results show that mitonuclear genetic variation affects both behavioural and life-history traits, and they provide novel insights into the maintenance of genetic variation in behaviour and personality.

Intergenomic Interactions in Hybrids Between Short-Lived and Long-Lived Lines of a Seed Beetle: Analyses of Life History Traits

2015 ◽  
Vol 42 (4) ◽  
pp. 461-472 ◽  
Author(s):  
Mirko Đorđević ◽  
Uroš Savković ◽  
Jelica Lazarević ◽  
Nikola Tucić ◽  
Biljana Stojković
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Seed Beetle ◽  
Intergenomic Interactions

Prey tell: what quillback rockfish early life history traits reveal about their survival in encounters with juvenile coho salmon

2020 ◽  
Vol 650 ◽  
pp. 7-18 ◽  
Author(s):  
HW Fennie ◽  
S Sponaugle ◽  
EA Daly ◽  
RD Brodeur
Keyword(s):  
Life History ◽  
Early Life ◽  
Life History Traits ◽  
Direct Evidence ◽  
Coho Salmon ◽  
Larval Fish ◽  
Early Life History ◽  
In The Wild ◽  
Otolith Microstructure Analysis ◽  
Pelagic Juvenile

Predation is a major source of mortality in the early life stages of fishes and a driving force in shaping fish populations. Theoretical, modeling, and laboratory studies have generated hypotheses that larval fish size, age, growth rate, and development rate affect their susceptibility to predation. Empirical data on predator selection in the wild are challenging to obtain, and most selective mortality studies must repeatedly sample populations of survivors to indirectly examine survivorship. While valuable on a population scale, these approaches can obscure selection by particular predators. In May 2018, along the coast of Washington, USA, we simultaneously collected juvenile quillback rockfish Sebastes maliger from both the environment and the stomachs of juvenile coho salmon Oncorhynchus kisutch. We used otolith microstructure analysis to examine whether juvenile coho salmon were age-, size-, and/or growth-selective predators of juvenile quillback rockfish. Our results indicate that juvenile rockfish consumed by salmon were significantly smaller, slower growing at capture, and younger than surviving (unconsumed) juvenile rockfish, providing direct evidence that juvenile coho salmon are selective predators on juvenile quillback rockfish. These differences in early life history traits between consumed and surviving rockfish are related to timing of parturition and the environmental conditions larval rockfish experienced, suggesting that maternal effects may substantially influence survival at this stage. Our results demonstrate that variability in timing of parturition and sea surface temperature leads to tradeoffs in early life history traits between growth in the larval stage and survival when encountering predators in the pelagic juvenile stage.

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