scholarly journals Microgeographic local adaptation and ecotype distributions: The role of selective processes on early life‐history traits in sympatric, ecologically divergent Symphonia populations

2020 ◽  
Vol 10 (19) ◽  
pp. 10735-10753
Author(s):  
Niklas Tysklind ◽  
Marie‐Pierre Etienne ◽  
Caroline Scotti‐Saintagne ◽  
Alexandra Tinaut ◽  
Maxime Casalis ◽  
...  
Keyword(s):  
Life History ◽  
Local Adaptation ◽  
Early Life ◽  
Life History Traits ◽  
Early Life History

scholarly journals Microgeographic local adaptation and species distributions: the role of selective processes on early life history traits in the Symphonia syngameon.

Authorea ◽  
2020 ◽  
Author(s):  
Niklas Tysklind ◽  
Marie Pierre Etienne ◽  
Caroline Scotti Saintagne ◽  
Alexandra Tinaut ◽  
Valerie Troispoux ◽  
...  
Keyword(s):  
Life History ◽  
Local Adaptation ◽  
Early Life ◽  
Life History Traits ◽  
Species Distributions ◽  
Early Life History

scholarly journals Local adaptation in brown trout early life-history traits: implications for climate change adaptability

2008 ◽  
Vol 275 (1653) ◽  
pp. 2859-2868 ◽  
Author(s):  
Lasse Fast Jensen ◽  
Michael M Hansen ◽  
Cino Pertoldi ◽  
Gert Holdensgaard ◽  
Karen-Lise Dons Mensberg ◽  
...  
Keyword(s):  
Climate Change ◽  
Life History ◽  
Local Adaptation ◽  
Brown Trout ◽  
Early Life ◽  
Salmo Trutta ◽  
Life History Traits ◽  
Additive Genetic Variance ◽  
Early Life History ◽  
Temperature Regimes

Knowledge of local adaptation and adaptive potential of natural populations is becoming increasingly relevant due to anthropogenic changes in the environment, such as climate change. The concern is that populations will be negatively affected by increasing temperatures without the capacity to adapt. Temperature-related adaptability in traits related to phenology and early life history are expected to be particularly important in salmonid fishes. We focused on the latter and investigated whether four populations of brown trout ( Salmo trutta ) are locally adapted in early life-history traits. These populations spawn in rivers that experience different temperature conditions during the time of incubation of eggs and embryos. They were reared in a common-garden experiment at three different temperatures. Quantitative genetic differentiation ( Q ST ) exceeded neutral molecular differentiation ( F ST ) for two traits, indicating local adaptation. A temperature effect was observed for three traits. However, this effect varied among populations due to locally adapted reaction norms, corresponding to the temperature regimes experienced by the populations in their native environments. Additive genetic variance and heritable variation in phenotypic plasticity suggest that although increasing temperatures are likely to affect some populations negatively, they may have the potential to adapt to changing temperature regimes.

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.

Impact of salinity on early life history traits of three estuarine fish species in Senegal

2009 ◽  
Vol 82 (4) ◽  
pp. 673-681 ◽  
Author(s):  
Maylis Labonne ◽  
Eric Morize ◽  
Pierre Scolan ◽  
Raymond Lae ◽  
Eric Dabas ◽  
...  
Keyword(s):  
Life History ◽  
Fish Species ◽  
Early Life ◽  
Life History Traits ◽  
Early Life History ◽  
Estuarine Fish
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