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33 results for “Round goby”
Data from: Genetic patterns across an invasion's history: a test of change versus stasis for the Eurasian round goby in North America
Biological invasions comprise accidental evolutionary experiments, whose genetic compositions underlie relative success, spread, and persistence in new habitats. However, little is known about whether, or how, their population genetic patterns change temporally and/or spatially across the invasion's history. Theory predicts that most would undergo founder effect, exhibit low genetic divergence across the new range, and gain variation over time via new arriving propagules. To test these predictions, we analyze population genetic diversity and divergence patterns of the Eurasian round goby Neogobius melanostomus across the two decades of its North American invasion in the Laurentian Great Lakes, comparing results from 13 nuclear DNA microsatellite loci and mitochondrial DNA cytochrome b sequences. We test whether "genetic stasis", "genetic replacement", and/or "genetic supplement" scenarios have occurred at the invasion's core and expansion sites, in comparison to its primary native source population in the Dnieper River, Black Sea. Results reveal pronounced genetic divergence across the exotic range, with population areas remaining genetically distinct and statistically consistent across two decades, supporting "genetic stasis" and "founder takes most". The original genotypes continue to predominate, whose high population growth likely outpaced the relative success of later arrivals. The original invasion core has stayed the most similar to the native source. Secondary expansion sites indicate slight allelic composition convergence towards the core population over time, attributable to some early "genetic supplementation". The geographic and temporal coverage of this investigation offers a rare opportunity to discern population dynamics over time and space in context of invasion genetic theory versus reality.
Effect of heat shock and competition on the antioxidant system of round goby
<p><span><span><span><span><span><span><span><span><span><span><span>Monitoring oxidative stress biomarkers has become a powerful and common tool to estimate organismal condition and response to endogenous and environmental factors. In the present study, we used round goby (<i>Neogobius melanostomus</i>) from non-native European populations, as a model species to test sex differences in oxidative stress biomarkers. Considering sex differences in reproductive investment, we hypothesized that males would display lower resistance to abiotic stress. Fish were exposed to a heat shock (temperature elevated by 10°C) for 1h, 6h, and 12h and catalase activity (CAT), reduced glutathione (GSH), total antioxidant capacity (TAC) and lipid peroxidation (LPO) were measured in liver and muscle tissues. Liver of males was significantly more responsive compared to liver of females in all tested parameters. GSH was found to be the most responsive to heat stress exposure in both sexes. The results supported our hypothesis that male reproductive investment (territoriality, courtship, and brood care) and likelihood of only a single spawning period in their lifetime influenced on higher sensitivity of their antioxidant defence. On the other hand, for females antioxidant defence is considered more important to survive the environmental changes and successfully reproduce in the next season. Our experiments exposed fish to acute thermal stress. Further research should determine the effects of exposure to chronic thermal stress to corroborate our understanding on sex differences in antioxidant defence in the round goby.</span></span></span></span></span></span></span></span></span></span></span></p>
Round goby Neogobius melanostomus genome annotation
<p>Annotation file for the round goby genome (sequence deposited as “RGoby_Basel_V2”, BioProject accession PRJNA549924, BioSample SAMN12099445, GenBank genome accession VHKM00000000, release date July 22 2019). </p> <p>Supplementary Material S1 for Adrian-Kalchhauser et al, BMC Biology, The round goby genome provides insights into mechanisms that may facilitate biological invasions.</p> <p>The round goby genome assembly was annotated using Maker v2.31.8. Two iterations were run with assembled transcripts from round goby embryonic tissue and data from eleven other actinopterygian species available in the ENSEMBL database as well as the SwissProt protein set from the uniprot database as evidence (downloaded March 2, 2016). In addition, an initial set of reference sequences obtained from a closely related species, the sand goby (<em>Pomatoschistus minutus</em>), sequenced by the IMAGO marine genomes project of the CeMEB consortium at University of Gothenburg, Sweden was included. The second maker iteration was run after first training the gene modeler SNAP version 2006-07-28 based on the results from the first run. Augustus v3.2.2 was run with initial parameter settings from zebrafish (<em>Danio rerio</em>). Repeat regions in the genome were masked using RepeatMasker known elements and repeat libraries from Repbase as well as <em>de novo</em> identified repeats from the round goby genome assembly obtained from a RepeatModeler analysis.</p>
The effect of temperature on round goby embryo development
<p><span>The dataset describes the laboratory studies of temperature effect on round goby embryo development. Incubation was carried out at the following water temperatures: 5°C, 10°C, 12°C, 15°C, 16°C, 20°C, 25°C. </span>The stages of embryo development were noted. The yolk sac was measured (two axes) from the images to determine its volume. </p>
Data from: A dynamical model for invasive round goby populations reveals efficient and effective management options
1. When prevention of invasive species' introductions fails, society faces the challenge to manage these invasive species in an effective and efficient way. The success of this depends on biological aspects and on cooperation between decision makers and scientists. Using the case of the round goby Neogobius melanostomus, one of Europe's worst invasive species, we propose an approach guiding scientists to co-produce effective and efficient population control measures in collaboration with decision makers. 2. We surveyed the effectiveness, urgency and simplicity perceived by decision makers as well as the support of two population control options: removal of eggs and/or adults. Using a field study and a dynamical population model, we investigated the effectiveness and efficiency for both options in different population contexts. 3. Decision makers initially seemed to lack a clear preference for either control option. After being presented with preliminary field and modelling results, decision makers mostly approved measures being developed to implement the two control options. 4. Starting population control early after detecting the species requires in total fewer years for eradication than controlling an established population: to reach an eradication success rate of 95%, 13 years for early start vs. 18 years for late start are needed when removing eggs and adults; when removing adults only, 20 vs. 29 years are needed. Removing eggs and adults combined results in a yearly effort of 5.01 h m-2, while removing adults only results in a yearly effort of 1.76 h m-2. Thus, removing adults only proved to be the most efficient option to eradicate the population. Nonetheless, considerable effort is needed: when removing less than 57% of the adult population, eradication is not feasible, even assuming low survival and fecundity rates for the population. Further, inflow of new propagules renders eradication efforts ineffective. 5. Synthesis and applications. Scientists who aim to support decision makers in finding an optimal control strategy for invasive species need to be able to provide scientific knowledge on effectiveness and efficiency of different options. For round goby and most non-native species, eradication is only feasible if started early in recently arrived populations and if inflow of new propagules can be prevented.
Supplementary material 1 from: van Deurs M, Moran NP, Schreiber Plet-Hansen K, Dinesen GE, Azour F, Carl H, Møller PR, Behrens JW (2021) Impacts of the invasive round goby (Neogobius melanostomus) on benthic invertebrate fauna: a case study from the Baltic Sea. NeoBiota 68: 19-30. https://doi.org/10.3897/neobiota.68.67340
S1. Sampling Areas (Figure S1); S2. Taxonomic Groupings S1; S3. Model Specifications (Table S2); S4. Sensitivity Analyses (Table S3, Figure S2)
Data from: Coalescent models characterize sources and demographic history of recent round goby colonization of Great Lakes and inland waters
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Data from: A dynamical model for invasive round goby populations reveals efficient and effective management options
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Effect of heat shock and competition on the antioxidant system of round goby
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Data from: Invasion strategies in round goby (Neogobius melanostomus): is bigger really better?
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Data from: Genetic patterns across an invasion's history: a test of change versus stasis for the Eurasian round goby in North America
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Supplementary material 1 from: Vivó-Pons A, Wallin-Kihlberg I, Olsson J, Ljungberg P, Behrens J, Lindegren M (2023) The devil is in the details: exploring how functionally distinct round goby is among native fish in the Baltic Sea. NeoBiota 89: 161-186. https://doi.org/10.3897/neobiota.89.110203
Supplementary information
Environmental abundances of the non-native round goby Neogobius melanostomus influence feeding of native fish predators
<p>Data on predator stomach contents from visual identification (VSCA) and DNA metabarcoding, as well as standardized catches of round goby in the study areas during five months with corresponding values for round goby abundances and proportions in predator stomach contents, and relative gut fullness of predators.</p>
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