Specificity of predator-induced neck spine and alteration in life history traits in Daphnia pulex

Hydrobiologia ◽  
1994 ◽  
Vol 294 (2) ◽  
pp. 129-140 ◽  
Author(s):  
Sari Repka ◽  
Matti Ketola ◽  
Mari Walls
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Daphnia Pulex

scholarly journals Loci, genes, and gene networks associated with life history variation in a model ecological organism,Daphnia pulex(complex)

2018 ◽  
Author(s):  
Jacob W. Malcom ◽  
Thomas E. Juenger ◽  
Mathew A. Leibold
Keyword(s):  
Gene Expression ◽  
Genetic Variation ◽  
Life History ◽  
Molecular Basis ◽  
Life History Traits ◽  
Evolutionary Dynamics ◽  
Daphnia Pulex ◽  
Life History Trait ◽  
Life History Variation ◽  
Trait Variation

ABSTRACTBackgroundIdentifying the molecular basis of heritable variation provides insight into the underlying mechanisms generating phenotypic variation and the evolutionary history of organismal traits. Life history trait variation is of central importance to ecological and evolutionary dynamics, and contemporary genomic tools permit studies of the basis of this variation in non-genetic model organisms. We used high density genotyping, RNA-Seq gene expression assays, and detailed phenotyping of fourteen ecologically important life history traits in a wild-caught panel of 32Daphnia pulexclones to explore the molecular basis of trait variation in a model ecological species.ResultsWe found extensive phenotypic and a range of heritable genetic variation (~0 < H2< 0.44) in the panel, and accordingly identify 75-261 genes—organized in 3-6 coexpression modules—associated with genetic variation in each trait. The trait-related coexpression modules possess well-supported promoter motifs, and in conjunction with marker variation at trans- loci, suggest a relatively small number of important expression regulators. We further identify a candidate genetic network with SNPs in eight known transcriptional regulators, and dozens of differentially expressed genes, associated with life history variation. The gene-trait associations include numerous un-annotated genes, but also support several a priori hypotheses, including an ecdysone-induced protein and several Gene Ontology pathways.ConclusionThe genetic and gene expression architecture ofDaphnialife history traits is complex, and our results provide numerous candidate loci, genes, and coexpression modules to be tested as the molecular mechanisms that underlieDaphniaeco-evolutionary dynamics.

Non-toxic and toxic Microcystis aeruginosa reduce the tolerance of Daphnia pulex to low calcium in different degrees: Based on the changes in the key life-history traits

Chemosphere ◽  
2020 ◽  
Vol 248 ◽  
pp. 126101 ◽  
Author(s):  
Jing Huang ◽  
Yurou Li ◽  
Qiming Zhou ◽  
Yunfei Sun ◽  
Lu Zhang ◽  
...  
Keyword(s):  
Life History ◽  
Microcystis Aeruginosa ◽  
Life History Traits ◽  
Daphnia Pulex ◽  
Low Calcium

Antipredator reaction norms for life history traits in Daphnia pulex: dependence on temperature and food

Oikos ◽  
2002 ◽  
Vol 98 (2) ◽  
pp. 299-307 ◽  
Author(s):  
D. Weetman ◽  
D. Atkinson
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Daphnia Pulex ◽  
Reaction Norms

Effects of copper on life-history traits of Daphnia pulex and Bosmina longirostris

1995 ◽  
Vol 32 (2-3) ◽  
pp. 255-269 ◽  
Author(s):  
Sanna Koivisto ◽  
Matti Ketola
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Daphnia Pulex ◽  
Bosmina Longirostris

Effects of UVB‐irradiated algae on life history traits of Daphnia pulex

1997 ◽  
Vol 38 (3) ◽  
pp. 711-720 ◽  
Author(s):  
HENDRIKA DE LANGE ◽  
ELLEN VAN DONK
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Daphnia Pulex

scholarly journals Evolution of asexual Daphnia pulex in Japan: variations and covariations of the digestive, morphological and life history traits

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Xiaofei Tian ◽  
Hajime Ohtsuki ◽  
Jotaro Urabe
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Daphnia Pulex

Colonization dynamics and life history traits of seven Daphnia pulex genotypes

Oecologia ◽  
1987 ◽  
Vol 72 (2) ◽  
pp. 263-271 ◽  
Author(s):  
M. J. Vanni
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Daphnia Pulex ◽  
Colonization Dynamics

scholarly journals The life-history fitness of F1 hybrids of the microcrustacean Daphnia pulex and D. pulicaria (Crustacea, Anomopoda)

2020 ◽  
Author(s):  
Irene Moy ◽  
Makayla Green ◽  
Thinh Phu Pham ◽  
Dustin Luu ◽  
Sen Xu
Keyword(s):  
Life History ◽  
Epistatic Interaction ◽  
Life History Traits ◽  
Early Stage ◽  
Daphnia Pulex ◽  
F1 Hybrids ◽  
Negative Interaction

AbstractNegative interaction between alleles that arise independently in diverging populations (i.e., Dobzhansky-Muller incompatibilities) can cause reduction of fitness in their hybrids. However, heterosis in hybrids can emerge if hybridization breaks down detrimental epistatic interaction within parental lineages. In this study, we examined the life-history fitness of the inter-specific F1 hybrids of two recently diverged microcrustacean species Daphnia pulex and D. pulicaria as well as intra-specific F1 hybrids of D. pulex. We identified heterosis in four out of five life-history traits in the inter-specific F1 hybrids. The observation of heterosis in these life-history traits suggests that there are no major genetic incompatibilities between these two species affecting these traits. This also suggests that D. pulex and D. pulicaria are at the early stage of speciation where heterosis can still occur.

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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