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https://www.readbyqxmd.com/read/29149730/divergence-of-insulin-superfamily-ligands-receptors-and-igf-binding-proteins-in-marine-versus-freshwater-stickleback-evidence-of-selection-in-known-and-novel-genes
#1
Tim Pellissier, Hend Al Nafea, Sara V Good
Three-spine stickleback (Gasterosteus aculeatus) is a teleost model for understanding genetic, physiological and morphological changes accompanying freshwater (FW) adaptation. There is growing evidence that the insulin superfamily plays important roles in traits involved in marine and FW adaptation. We performed a candidate gene analysis to look for evidence of selection on 33 insulin superfamily ligand-receptor genes and insulin-like growth factor binding proteins (Igfbp's) in stickleback. Using genotype data from 11 marine and 10 FW populations, we calculated the number of SNPs per site in regulatory and intronic regions, the number of synonymous and nonsynonymous mutations in coding regions, Wright's fixation index (Fst), and performed t-tests to identify SNPs with divergent genotype frequencies between marine/FW versus Atlantic/Pacific populations...
November 10, 2017: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/29126411/thermal-conditions-during-early-life-influence-seasonal-maternal-strategies-in-the-three-spined-stickleback
#2
Sin-Yeon Kim, Neil B Metcalfe, Alberto da Silva, Alberto Velando
BACKGROUND: Conditions experienced by a female during early life may affect her reproductive strategies and maternal investment later in life. This effect of early environmental conditions is a potentially important mechanism by which animals can compensate for the negative impacts of climate change. In this study, we experimentally tested whether three-spined sticklebacks (Gasterosteus aculeatus) change their maternal strategy according to environmental temperatures experienced earlier in life...
November 10, 2017: BMC Ecology
https://www.readbyqxmd.com/read/29117505/changes-in-behavior-and-brain-immediate-early-gene-expression-in-male-threespined-sticklebacks-as-they-become-fathers
#3
Molly Kent, Alison M Bell
Motherhood is a period of intense behavioral and brain activity. However, we know less about the neural and molecular mechanisms associated with the demands of fatherhood. Here, we report the results of two experiments designed to track changes in behavior and brain activation associated with fatherhood in male threespined stickleback fish (Gasterosteus aculeatus), a species in which fathers are the sole providers of parental care. In experiment 1, we tested whether males' behavioral reactions to different social stimuli depends on parental status, i...
November 14, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29115024/developmental-timing-differences-underlie-armor-loss-across-threespine-stickleback-populations
#4
Mark C Currey, Susan Bassham, Stephen Perry, William A Cresko
Comparing ontogenetic patterns within a well-described evolutionary context aids in inferring mechanisms of change, including heterochronies or deletion of developmental pathways. Because selection acts on phenotypes throughout ontogeny, any within-taxon developmental variation has implications for evolvability. We compare ontogenetic order and timing of locomotion and defensive traits in three populations of threespine stickleback that have evolutionarily divergent adult forms. This analysis adds to the growing understanding of developmental genetic mechanisms of adaptive change in this evolutionary model species by delineating when chondrogenesis and osteogenesis in two derived populations begin to deviate from the developmental pattern in their immediate ancestors...
November 2017: Evolution & Development
https://www.readbyqxmd.com/read/29093174/metabolic-depression-and-the-evolution-of-hypoxia-tolerance-in-threespine-stickleback-gasterosteus-aculeatus
#5
Matthew D Regan, Ivan S Gill, Jeffrey G Richards
Anthropogenic increases in global temperature and agricultural runoff are increasing the prevalence of aquatic hypoxia throughout the world. We investigated the potential for a relatively rapid evolution of hypoxia tolerance using two isolated (for less than 11 000 years) populations of threespine stickleback: one from a lake that experiences long-term hypoxia (Alta Lake, British Columbia) and one from a lake that does not (Trout Lake, British Columbia). Loss-of-equilibrium (LOE) experiments revealed that the Alta Lake stickleback were significantly more tolerant of hypoxia than the Trout Lake stickleback, and calorimetry experiments revealed that the enhanced tolerance of Alta Lake stickleback may be associated with their ability to depress metabolic rate (as indicated by metabolic heat production) by 33% in hypoxia...
November 2017: Biology Letters
https://www.readbyqxmd.com/read/29059215/dna-metabarcoding-reveals-diverse-diet-of-the-three-spined-stickleback-in-a-coastal-ecosystem
#6
Eglė Jakubavičiūtė, Ulf Bergström, Johan S Eklöf, Quiterie Haenel, Sarah J Bourlat
The three-spined stickleback (Gasterosteus aculeatus L., hereafter 'stickleback') is a common mesopredatory fish in marine, coastal and freshwater areas. In large parts of the Baltic Sea, stickleback densities have increased >10-fold during the last decades, and it is now one of the dominating fish species both in terms of biomass and effects on lower trophic levels. Still, relatively little is known about its diet-knowledge which is essential to understand the increasing role sticklebacks play in the ecosystem...
2017: PloS One
https://www.readbyqxmd.com/read/29058178/developmental-exposure-to-the-ssri-citalopram-causes-long-lasting-behavioural-effects-in-the-three-spined-stickleback-gasterosteus-aculeatus
#7
M Kellner, T Porseryd, I Porsch-Hällström, B Borg, C Roufidou, K H Olsén
Selective Serotonin re-uptake inhibitors (SSRIs) are a class of psychotropic drugs used to treat depression in both adolescents and pregnant or breast-feeding mothers as well as in the general population. Recent research on rodents points to long-lasting behavioural effects of pre- and perinatal exposure to SSRIs which last into adulthood. In fish however, studies on effects of developmental exposure to SSRIs appears to be non-existent. In order to study effects of developmental SSRI exposure in fish, three-spine sticklebacks were exposed to 1...
October 23, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/29056455/genetic-coupling-of-female-mate-choice-with-polygenic-ecological-divergence-facilitates-stickleback-speciation
#8
Rachael A Bay, Matthew E Arnegard, Gina L Conte, Jacob Best, Nicole L Bedford, Shaugnessy R McCann, Matthew E Dubin, Yingguang Frank Chan, Felicity C Jones, David M Kingsley, Dolph Schluter, Catherine L Peichel
Ecological speciation with gene flow is widespread in nature [1], but it presents a conundrum: how are associations between traits under divergent natural selection and traits that contribute to assortative mating maintained? Theoretical models suggest that genetic mechanisms inhibiting free recombination between loci underlying these two types of traits (hereafter, "genetic coupling") can facilitate speciation [2-4]. Here, we perform a direct test for genetic coupling by mapping both divergent traits and female mate choice in a classic model of ecological speciation: sympatric benthic and limnetic threespine stickleback (Gasterosteus aculeatus)...
November 6, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29021318/salinity-induced-phenotypic-plasticity-in-threespine-stickleback-sperm-activation
#9
Annette Taugbøl, Anna B Mazzarella, Emily R A Cramer, Terje Laskemoen
Phenotypic expression may be and often is influenced by an organism's developmental environment, referred to as phenotypic plasticity. The sperm cells of teleosts have been found to be inactive in the seminal plasma and are activated by osmotic shock for most fish species, through release in either hypertonic (for marine fish) or hypotonic (for freshwater fish) water. If this is the case, the regulatory system of sperm mobility should be reversed in salt- and freshwater fish. We tested this hypothesis by first activating sperm of salt- and freshwater populations of threespine stickleback in salt- and freshwater...
October 2017: Biology Letters
https://www.readbyqxmd.com/read/29018617/perch-perca-fluviatilis-show-a-directional-preference-for-but-do-not-increase-attacks-toward-prey-in-response-to-water-borne-cortisol
#10
Lindsay J Henderson, Mary R Ryan, Hannah M Rowland
In freshwater environments, chemosensory cues play an important role in predator-prey interactions. Prey use a variety of chemosensory cues to detect and avoid predators. However, whether predators use the chemical cues released by disturbed or stressed prey has received less attention. Here we tested the hypothesis that the disturbance cue cortisol, in conjunction with visual cues of prey, elevates predatory behavior. We presented predators (perch, Perca fluviatilis) with three chemosensory choice tests and recorded their location, orientation, and aggressive behavior...
2017: PeerJ
https://www.readbyqxmd.com/read/28980809/elucidating-the-behavior-of-cyclic-volatile-methylsiloxanes-in-a-subarctic-freshwater-food-web-a-modeled-and-measured-approach
#11
Ingjerd S Krogseth, Emma Undeman, Anita Evenset, Guttorm N Christensen, Mick J Whelan, Knut Breivik, Nicholas A Warner
Cyclic volatile methylsiloxanes (cVMS) are used in personal care products and emitted to aquatic environments through wastewater effluents, and their bioaccumulation potential is debated. Here, a new bentho-pelagic version of the ACC-HUMAN model was evaluated for polychlorinated biphenyls (PCBs) and applied to cVMS in combination with measurements to explore their bioaccumulation behavior in a subarctic lake. Predictions agreed better with measured PCB concentrations in Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta) when the benthic link was included than in the pelagic-only model...
November 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28978736/persistent-and-plastic-effects-of-temperature-on-dna-methylation-across-the-genome-of-threespine-stickleback-gasterosteus-aculeatus
#12
David C H Metzger, Patricia M Schulte
Epigenetic mechanisms such as changes in DNA methylation have the potential to affect the resilience of species to climate change, but little is known about the response of the methylome to changes in environmental temperature in animals. Using reduced representation bisulfite sequencing, we assessed the effects of development temperature and adult acclimation temperature on DNA methylation levels in threespine stickleback (Gasterosteus aculeatus). Across all treatments, we identified 2130 differentially methylated cytosines distributed across the genome...
October 11, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28963514/transgenerational-selection-driven-by-divergent-ecological-impacts-of-hybridizing-lineages
#13
Rebecca J Best, Jaime M Anaya-Rojas, Miguel C Leal, Dominik W Schmid, Ole Seehausen, Blake Matthews
Dynamic interactions between ecological conditions and the phenotypic composition of populations likely play an important role in evolution, but the direction and strength of these feedbacks remain difficult to characterize. We investigated these dynamics across two generations of threespine sticklebacks from two evolutionary lineages undergoing secondary contact and hybridization. Independently manipulating the density and lineage of adults in experimental mesocosms led to contrasting ecosystem conditions with strong effects on total survival in a subsequent generation of juveniles...
September 18, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28955327/gene-expression-contributes-to-the-recent-evolution-of-host-resistance-in-a-model-host-parasite-system
#14
Brian K Lohman, Natalie C Steinel, Jesse N Weber, Daniel I Bolnick
Heritable population differences in immune gene expression following infection can reveal mechanisms of host immune evolution. We compared gene expression in infected and uninfected threespine stickleback (Gasterosteus aculeatus) from two natural populations that differ in resistance to a native cestode parasite, Schistocephalus solidus. Genes in both the innate and adaptive immune system were differentially expressed as a function of host population, infection status, and their interaction. These genes were enriched for loci controlling immune functions known to differ between host populations or in response to infection...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28950084/social-behaviour-the-personalities-of-groups
#15
James E Herbert-Read
A new study on stickleback provides a framework for understanding how the behaviour of individuals in groups, and the structure and movements of groups themselves, can be predicted from the personalities of individual group members.
September 25, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28942772/hook-line-and-infection-a-guide-to-culturing-parasites-establishing-infections-and-assessing-immune-responses-in-the-three-spined-stickleback
#16
Alexander Stewart, Joseph Jackson, Iain Barber, Christophe Eizaguirre, Rachel Paterson, Pieter van West, Chris Williams, Joanne Cable
The three-spined stickleback (Gasterosteus aculeatus) is a model organism with an extremely well-characterized ecology, evolutionary history, behavioural repertoire and parasitology that is coupled with published genomic data. These small temperate zone fish therefore provide an ideal experimental system to study common diseases of coldwater fish, including those of aquacultural importance. However, detailed information on the culture of stickleback parasites, the establishment and maintenance of infections and the quantification of host responses is scattered between primary and grey literature resources, some of which is not readily accessible...
2017: Advances in Parasitology
https://www.readbyqxmd.com/read/28889975/consistent-individual-differences-drive-collective-behavior-and-group-functioning-of-schooling-fish
#17
Jolle W Jolles, Neeltje J Boogert, Vivek H Sridhar, Iain D Couzin, Andrea Manica
The ubiquity of consistent inter-individual differences in behavior ("animal personalities") [1, 2] suggests that they might play a fundamental role in driving the movements and functioning of animal groups [3, 4], including their collective decision-making, foraging performance, and predator avoidance. Despite increasing evidence that highlights their importance [5-16], we still lack a unified mechanistic framework to explain and to predict how consistent inter-individual differences may drive collective behavior...
September 25, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28881442/many-to-one-form-to-function-mapping-weakens-parallel-morphological-evolution
#18
Cole J Thompson, Newaz I Ahmed, Thor Veen, Catherine L Peichel, Andrew P Hendry, Daniel I Bolnick, Yoel E Stuart
Evolutionary ecologists aim to explain and predict evolutionary change under different selective regimes. Theory suggests that such evolutionary prediction should be more difficult for biomechanical systems in which different trait combinations generate the same functional output: "many-to-one mapping." Many-to-one mapping of phenotype to function enables multiple morphological solutions to meet the same adaptive challenges. Therefore, many-to-one mapping should undermine parallel morphological evolution, and hence evolutionary predictability, even when selection pressures are shared among populations...
November 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28873953/genome-wide-dna-methylation-profiling-reveals-epigenetic-adaptation-of-stickleback-to-marine-and-freshwater-conditions
#19
Artem V Artemov, Nikolai S Mugue, Sergey M Rastorguev, Svetlana Zhenilo, Alexander M Mazur, Svetlana V Tsygankova, Eugenia S Boulygina, Daria Kaplun, Artem V Nedoluzhko, Yulia A Medvedeva, Egor B Prokhortchouk
The three-spined stickleback (Gasterosteus aculeatus) represents a convenient model to study microevolution-adaptation to a freshwater environment. Although genetic adaptations to freshwater environments are well-studied, epigenetic adaptations have attracted little attention. In this work, we investigated the role of DNA methylation in the adaptation of the marine stickleback population to freshwater conditions. DNA methylation profiling was performed in marine and freshwater populations of sticklebacks, as well as in marine sticklebacks placed into a freshwater environment and freshwater sticklebacks placed into seawater...
September 1, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28855412/responses-of-neurogenesis-and-neuroplasticity-related-genes-to-elevated-co2-levels-in-the-brain-of-three-teleost-species
#20
Floriana Lai, Cathrine E Fagernes, Nicholas J Bernier, Gabrielle M Miller, Philip L Munday, Fredrik Jutfelt, Göran E Nilsson
The continuous increase of anthropogenic CO2 in the atmosphere resulting in ocean acidification has been reported to affect brain function in some fishes. During adulthood, cell proliferation is fundamental for fish brain growth and for it to adapt in response to external stimuli, such as environmental changes. Here we report the first expression study of genes regulating neurogenesis and neuroplasticity in brains of three-spined stickleback (Gasterosteus aculeatus), cinnamon anemonefish (Amphiprion melanopus) and spiny damselfish (Acanthochromis polyacanthus) exposed to elevated CO2 The mRNA expression levels of the neurogenic differentiation factor (NeuroD) and doublecortin (DCX) were upregulated in three-spined stickleback exposed to high-CO2 compared with controls, while no changes were detected in the other species...
August 2017: Biology Letters
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