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https://www.readbyqxmd.com/read/28211194/a-field-reciprocal-transplant-experiment-reveals-asymmetric-costs-of-migration-between-lake-and-river-ecotypes-of-three-spined-sticklebacks-gasterosteus-aculeatus
#1
Joshka Kaufmann, Tobias L Lenz, Martin Kalbe, Manfred Milinski, Christophe Eizaguirre
Theory of local adaptation predicts that non-adapted migrants will suffer increased costs compared to local residents. Ultimately this process can result in the reduction of gene flow and culminate in speciation. Here, we experimentally investigated the relative fitness of migrants in foreign habitats, focusing on diverging lake and river ecotypes of three-spined sticklebacks. A reciprocal transplant experiment performed in the field revealed asymmetric costs of migration: while mortality of river fish was increased under lake conditions, lake migrants suffered from reduced growth relative to river residents...
February 17, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28195171/eda-haplotypes-in-three-spined-stickleback-are-associated-with-variation-in-immune-gene-expression
#2
Shaun Robertson, Janette E Bradley, Andrew D C MacColl
Haplotypes underlying local adaptation and speciation are predicted to have numerous phenotypic effects, but few genes involved have been identified, with much work to date concentrating on visible, morphological, phenotypes. The link between genes controlling these adaptive morphological phenotypes and the immune system has seldom been investigated, even though changes in the immune system could have profound adaptive consequences. The Eda gene in three-spined stickleback is one of the best studied major adaptation genes; it directly controls bony plate architecture and has been associated with additional aspects of adaptation to freshwater...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28149521/erratum-expression-of-genes-involved-in-brain-gabaergic-neurotransmission-in-three-spined-stickleback-exposed-to-near-future-co2
#3
Floriana Lai, Cathrine E Fagernes, Fredrik Jutfelt, Göran E Nilsson
[This corrects the article DOI: 10.1093/conphys/cow068.][This corrects the article DOI: 10.1093/conphys/cow068.].
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28118391/phylogeography-and-conservation-genetics-of-the-ibero-balearic-three-spined-stickleback-gasterosteus-aculeatus
#4
Marta Vila, Miguel Hermida, Carlos Fernández, Silvia Perea, Ignacio Doadrio, Rafaela Amaro, Eduardo San Miguel
Genetic isolation and drift may imperil peripheral populations of wide-ranging species more than central ones. Therefore, information about species genetic variability and population structure is invaluable for conservation managers. The Iberian populations of three-spined stickleback lie at the southwestern periphery of the European distribution of Gasterosteus aculeatus. This teleost is a protected species in Portugal and Spain and local extinctions have been reported in both countries during the last decades...
2017: PloS One
https://www.readbyqxmd.com/read/28081447/hepatic-transcriptional-responses-to-copper-in-the-three-spined-stickleback-are-affected-by-their-pollution-exposure-history
#5
Tamsyn M Uren Webster, Tim D Williams, Ioanna Katsiadaki, Anke Lange, Ceri Lewis, Janice A Shears, Charles R Tyler, Eduarda M Santos
Some fish populations inhabiting contaminated environments show evidence of increased chemical tolerance, however the mechanisms contributing to this tolerance, and whether this is heritable, are poorly understood. We investigated the responses of two populations of wild three-spined stickleback (Gasterosteus aculeatus) with different histories of contaminant exposure to an oestrogen and copper, two widespread aquatic pollutants. Male stickleback originating from two sites, the River Aire, with a history of complex pollution discharges, and Siblyback Lake, with a history of metal contamination, were depurated and then exposed to copper (46μg/L) and the synthetic oestrogen ethinyloestradiol (22ng/L)...
March 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28075479/different-contributions-of-local-and-distant-regulatory-changes-to-transcriptome-divergence-between-stickleback-ecotypes
#6
Asano Ishikawa, Makoto Kusakabe, Kohta Yoshida, Mark Ravinet, Takashi Makino, Atsushi Toyoda, Asao Fujiyama, Jun Kitano
Differential gene expression can play an important role in phenotypic evolution and divergent adaptation. Although differential gene expression can be caused by both local- and distant-regulatory changes, we know little about their relative contribution to transcriptome evolution in natural populations. Here, we conducted expression quantitative trait loci (eQTL) analysis to investigate the genetic architecture underlying transcriptome divergence between marine and stream ecotypes of threespine sticklebacks (Gasterosteus aculeatus)...
January 11, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28073385/the-cestode-parasite-schistocephalus-pungitii-castrator-or-nutrient-thief-of-ninespine-stickleback-fish
#7
David C Heins
In this investigation, the host-parasite relationship of ninespine stickleback fish Pungitius pungitius and the cestode parasite Schistocephalus pungitii was studied using samples from Dog Bone Lake, Kenai Peninsula, Alaska, to test the hypothesis that S. pungitii is a castrator of ninespine stickleback. Infected, adult females of all sizes (ages) were capable of producing clutches of eggs. S. pungitii had a negative effect on the ability of host females to produce a clutch, which was related to increasing parasite:host mass ratio (parasite index, PI)...
January 11, 2017: Parasitology
https://www.readbyqxmd.com/read/28070298/community-structure-affects-trophic-ontogeny-in-a-predatory-fish
#8
Javier Sánchez-Hernández, Antti P Eloranta, Anders G Finstad, Per-Arne Amundsen
While most studies have focused on the timing and nature of ontogenetic niche shifts, information is scarce about the effects of community structure on trophic ontogeny of top predators. We investigated how community structure affects ontogenetic niche shifts (i.e., relationships between body length, trophic position, and individual dietary specialization) of a predatory fish, brown trout (Salmo trutta). We used stable isotope and stomach content analyses to test how functional characteristics of lake fish community compositions (competition and prey availability) modulate niche shifts in terms of (i) piscivorous behavior, (ii) trophic position, and (iii) individual dietary specialization...
January 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28052431/deciphering-the-genomic-architecture-of-the-stickleback-brain-with-a-novel-multi-locus-gene-mapping-approach
#9
Zitong Li, Baocheng Guo, Jing Yang, Gábor Herczeg, Abigél Gonda, Gergely Balázs, Takahito Shikano, Federico C F Calboli, Juha Merilä
Quantitative traits important to organismal function and fitness, such as brain size, are presumably controlled by many small-effect loci. Deciphering the genetic architecture of such traits with traditional quantitative trait locus (QTL) mapping methods is challenging. Here, we investigated the genetic architecture of brain size (and the size of five different brain parts) in nine-spined sticklebacks (Pungitius pungitius) with the aid of novel multi-locus QTL mapping approaches based on a de-biased LASSO method...
January 4, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28035893/resist-globally-infect-locally-a-transcontinental-test-of-adaptation-by-stickleback-and-their-tapeworm-parasite
#10
Jesse N Weber, Martin Kalbe, Kum Chuan Shim, Noémie I Erin, Natalie C Steinel, Lei Ma, Daniel I Bolnick
Parasite infections are a product of both ecological processes affecting host-parasite encounter rates and evolutionary dynamics affecting host susceptibility. However, few studies examine natural infection variation from both ecological and evolutionary perspectives. Here, we describe the ecological and evolutionary factors generating variation in infection rates by a tapeworm (Schistocephalus solidus) in a vertebrate host, the threespine stickleback (Gasterosteus aculeatus). To explore ecological aspects of infection, we measured tapeworm prevalence in Canadian stickleback inhabiting two distinct environments: marine and freshwater...
January 2017: American Naturalist
https://www.readbyqxmd.com/read/28029723/sensory-trait-variation-contributes-to-biased-dispersal-of-threespine-stickleback-in-flowing-water
#11
Yuexin Jiang, Catherine L Peichel, Fei Ling, Daniel I Bolnick
Gene flow is widely thought to homogenize spatially separate populations, eroding effects of divergent selection. The resulting theory of 'migration-selection balance' is predicated on a common assumption that all genotypes are equally prone to dispersal. If instead certain genotypes are disproportionately likely to disperse, then migration can actually promote population divergence. For example, previous work has shown that threespine stickleback (Gasterosteus aculeatus) differ in their propensity to move up- or down-stream ('rheotactic response'), which may facilitate genetic divergence between adjoining lake and stream populations of stickleback...
December 28, 2016: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28017848/testing-the-predictions-of-coping-styles-theory-in-threespined-sticklebacks
#12
Miles K Bensky, Ryan Paitz, Laura Pereira, Alison M Bell
Coping styles theory provides a framework for understanding individual variation in how animals respond to environmental change, and predicts how individual differences in stress responsiveness and behavior might relate to cognitive differences. According to coping styles theory, proactive individuals are bolder, less reactive to stressors, and more routinized than their reactive counterparts. A key tenet of coping styles theory is that variation in coping styles is maintained by tradeoffs with behavioral flexibility: proactive individuals excel in stable environments while more flexible, reactive individuals perform better in variable environments...
December 23, 2016: Behavioural Processes
https://www.readbyqxmd.com/read/28017364/contrasting-effects-of-hypoxia-on-copper-toxicity-during-development-in-the-three-spined-stickleback-gasterosteus-aculeatus
#13
Jennifer A Fitzgerald, Ioanna Katsiadaki, Eduarda M Santos
Hypoxia is a global problem in aquatic systems and often co-occurs with pollutants. Despite this, little is known about the combined effects of these stressors on aquatic organisms. The objective of this study was to investigate the combined effects of hypoxia and copper, a toxic metal widespread in the aquatic environment. We used the three-spined stickleback (Gasterosteus aculeatus) as a model because of its environmental relevance and amenability for environmental toxicology studies. We focused on embryonic development as this is considered to be a sensitive life stage to environmental pollution...
March 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27997044/major-host-transitions-are-modulated-through-transcriptome-wide-reprograming-events-in-schistocephalus-solidus-a-threespine-stickleback-parasite
#14
François Olivier Hébert, Stephan Grambauer, Iain Barber, Christian R Landry, Nadia Aubin-Horth
Parasites with complex life cycles have developed numerous phenotypic strategies, closely associated with developmental events, to enable the exploitation of different ecological niches and facilitate transmission between hosts. How these environmental shifts are regulated from a metabolic and physiological standpoint, however, still remain to be fully elucidated. We examined the transcriptomic response of Schistocephalus solidus, a trophically-transmitted parasite with a complex life cycle, over the course of its development in an intermediate host, the threespine stickleback, and the final avian host...
December 20, 2016: Molecular Ecology
https://www.readbyqxmd.com/read/27994127/the-genetic-and-molecular-architecture-of-phenotypic-diversity-in-sticklebacks
#15
REVIEW
Catherine L Peichel, David A Marques
A major goal of evolutionary biology is to identify the genotypes and phenotypes that underlie adaptation to divergent environments. Stickleback fish, including the threespine stickleback (Gasterosteus aculeatus) and the ninespine stickleback (Pungitius pungitius), have been at the forefront of research to uncover the genetic and molecular architecture that underlies phenotypic diversity and adaptation. A wealth of quantitative trait locus (QTL) mapping studies in sticklebacks have provided insight into long-standing questions about the distribution of effect sizes during adaptation as well as the role of genetic linkage in facilitating adaptation...
February 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27921295/digest-sticklebacks-do-not-just-go-with-the-flow-genetic-differentiation-between-lake-and-stream-populations-due-to-more-than-just-geographic-distance
#16
Emilie Richards, Aaron Comeault, Jelmer Poelstra
No abstract text is available yet for this article.
December 6, 2016: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/27915414/brownification-increases-winter-mortality-in-fish
#17
Per Hedström, David Bystedt, Jan Karlsson, Folmer Bokma, Pär Byström
In northern climates, winter is a bottleneck for many organisms. Low light and resource availability constrains individual foraging rates, potentially leading to starvation and increased mortality. Increasing input of humic substances to aquatic ecosystems causes brownification of water and hence a further decrease of light availability, which may lead to further decreased foraging rates and starvation mortality during winter. To test this hypothesis, we measured the effects of experimentally increased humic water input on consumption and survival of young-of-the-year three-spined stickleback (Gasterosteus aculeatus) over winter in large outdoor enclosures...
December 3, 2016: Oecologia
https://www.readbyqxmd.com/read/27913248/no-evidence-of-local-adaptation-of-immune-responses-to-gyrodactylus-in-three-spined-stickleback-gasterosteus-aculeatus
#18
Shaun Robertson, Janette E Bradley, Andrew D C MacColl
Parasitism represents one of the most widespread lifestyles in the animal kingdom, with the potential to drive coevolutionary dynamics with their host population. Where hosts and parasites evolve together, we may find local adaptation. As one of the main host defences against infection, there is the potential for the immune response to be adapted to local parasites. In this study, we used the three-spined stickleback and its Gyrodactylus parasites to examine the extent of local adaptation of parasite infection dynamics and the immune response to infection...
November 29, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27901297/climate-change-alters-the-reproductive-phenology-and-investment-of-a-lacustrine-fish-the-three-spine-stickleback
#19
Rachel A Hovel, Stephanie M Carlson, Thomas P Quinn
High-latitude lakes are particularly sensitive to the effects of global climate change, demonstrating earlier ice breakup, longer ice-free seasons, and increased water temperatures. Such physical changes have implications for diverse life-history traits in taxa across entire lake food webs. Here, we use a five-decade time series from an Alaskan lake to explore effects of climate change on growth and reproduction of a widely distributed lacustrine fish, the three-spine stickleback (Gasterosteus aculeatus). We used multivariate autoregressive state-space (MARSS) models to describe trends in the mean length for multiple size classes and to explore the influence of physical (date of ice breakup, surface water temperature) and biological (density of con- and heterospecifics) factors...
November 30, 2016: Global Change Biology
https://www.readbyqxmd.com/read/27901265/evolution-of-reproductive-isolation-in-stickleback-fish
#20
Alycia C R Lackey, Janette W Boughman
To understand how new species form and what causes their collapse, we examined how reproductive isolation evolves during the speciation process, considering species pairs with little to extensive divergence, including a recently collapsed pair. We estimated many reproductive barriers in each of five sets of stickleback fish species pairs using our own data and decades of previous work. We found that the types of barriers important early in the speciation process differ from those important late. Two premating barriers-habitat and sexual isolation-evolve early in divergence and remain two of the strongest barriers throughout speciation...
November 7, 2016: Evolution; International Journal of Organic Evolution
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