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20 results for “Eurytemora affinis”
Adaptation potential of the copepod Eurytemora affinis to a future warmer Baltic Sea
<p>To predict effects of global change on zooplankton populations, it is important to understand how present species adapt to temperature and how they respond to stressors interacting with temperature. Here we ask if the calanoid copepod <i>Eurytemora affinis</i> from the Baltic Sea can adapt to future climate warming. Populations were sampled at sites with different temperatures. Full sibling families were reared in the lab and used in two common garden experiments (1) populations crossed over 3 temperature treatments 12, 17 and 22.5°C and (2) populations crossed over temperature in interaction with salinity and algae of different food quality.<br> Genetic correlations of the full siblings' development time were not different from zero between 12°C and the two higher temperatures 17 °C and 22.5°C, but positively correlated between 17 °C and 22.5°C. Hence, a population at 12 °C is unlikely to adapt to warmer temperature, while a population at ≥ 17 °C can adapt to an even higher temperature, i.e. 22.5 °C. In agreement with the genetic correlations, the population from the warmest site of origin had comparably shorter development time at high temperature than the populations from colder sites, that is, a co-gradient variation. The population with the shortest development time at 22.5°C had in comparison lower survival on low quality food, illustrating a cost of short development time. Our results suggest that populations from warmer environments can at present indirectly adapt to a future warmer Baltic Sea, whereas populations from colder areas show reduced adaptation potential to high temperatures, simply because they experience an environment that is too cold.</p>
Data from: Adaptation potential of the copepod Eurytemora affinis to a future warmer Baltic Sea
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Data from: Evolutionary responses to crude oil from the Deepwater Horizon oil spill by the copepod Eurytemora affinis
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Data from: Testing for beneficial reversal of dominance during salinity shifts in the invasive copepod Eurytemora affinis, and implications for the maintenance of genetic variation
Maintenance of genetic variation at loci under selection has profound implications for adaptation under environmental change. In temporally and spatially varying habitats, non-neutral polymorphism could be maintained by heterozygote advantage across environments (marginal overdominance), which could be greatly increased by beneficial reversal of dominance across conditions. We tested for reversal of dominance and marginal overdominance in salinity tolerance in the salt-to-freshwater invading copepod Eurytemora affinis. We compared survival of F1 offspring generated by crossing saline and freshwater inbred lines (between-salinity F1 crosses) relative to within-salinity F1 crosses, across three salinities. We found evidence for both beneficial reversal of dominance and marginal overdominance in salinity tolerance. In support of reversal of dominance, survival of between-salinity F1 crosses was not different from that of freshwater F1 crosses under freshwater conditions and saltwater F1 crosses under saltwater conditions. In support of marginal overdominance, between-salinity F1 crosses exhibited significantly higher survival across salinities relative to both freshwater and saltwater F1 crosses. Our study provides a rare empirical example of complete beneficial reversal of dominance associated with environmental change. This mechanism might be crucial for maintaining genetic variation in salinity tolerance in E. affinis populations, allowing rapid adaptation to salinity changes during habitat invasions.
FIGURE 10 in A new species within the Eurytemora affinis complex (Copepoda: Calanoida) from the Atlantic Coast of USA, with observations on eight morphologically different European populations
FIGURE 10. Morphological indexes in Eurytemora affinis (Poppe, 1880) from the type locality and E. carolleeae sp.nov. from the Chesapeake Bay, USA and St. Lawrence Bay, Canada. Males: IndexP4, distal spine/segment length ration in EXP P4; IndexP5, L/W ratio in BAS P5 left. For more explanation see text.
FIGURE 6 in A new species within the Eurytemora affinis complex (Copepoda: Calanoida) from the Atlantic Coast of USA, with observations on eight morphologically different European populations
FIGURE 6. Eurytemora carolleeae sp. nov., male, ZIN 55051 (paratype): A, habitus, dorsal view; B, leg 5, anterior view; C, maxillula, anterior view; D, maxilliped, anterior view; E, maxilla, anterior view. Scale bar: A, 325 µm; B, 250 µm; C– E, 125 µm.
FIGURE 7 in A new species within the Eurytemora affinis complex (Copepoda: Calanoida) from the Atlantic Coast of USA, with observations on eight morphologically different European populations
FIGURE 7. Eurytemora carolleeae sp. nov., male, ZIN 55051 (paratype): A, swimming leg 1, anterior view; B, swimming leg 2, anterior view; C, swimming leg 3, anterior view; D, swimming leg 4, anterior view. Scale bar: 100 µm.
FIGURE 2 in A new species within the Eurytemora affinis complex (Copepoda: Calanoida) from the Atlantic Coast of USA, with observations on eight morphologically different European populations
FIGURE 2. Eurytemora carolleeae sp. nov., female, ZIN 55050 (holotype): A, habitus, dorsal view; B, urosome, ventral view; C, genital double-somite with P5, ventral view. Scale bar: A, B, 300 µm; C, 150 µm.
FIGURE 3 in A new species within the Eurytemora affinis complex (Copepoda: Calanoida) from the Atlantic Coast of USA, with observations on eight morphologically different European populations
FIGURE 3. Eurytemora carolleeae sp. nov. A, male antennula; B, female left antennula; C, male gnathobasis of mandible; D, female mandible with palp. Arrows indicate separate processor on gnathobasis. Scale bar: A, B, 125µm; C, D, 62.5 µm.
FIGURE 9 in A new species within the Eurytemora affinis complex (Copepoda: Calanoida) from the Atlantic Coast of USA, with observations on eight morphologically different European populations
FIGURE 9. Eurytemora carolleeae sp. nov. (A–D) and E. affinis (Poppe, 1880) (E–F): A, female mandible, arrow indicating a gap; B, male mandible, arrow indicating a gap; C, female genital somite with wing-like outgrowth; D, male leg 5 with arrow indicating left basipod; F, female genital somite without wing-like outgrowth; F, male P5, arrow indicating left basipod. (Photo: Mrs Natalia Sukhikh)
FIGURE 1 in A new species within the Eurytemora affinis complex (Copepoda: Calanoida) from the Atlantic Coast of USA, with observations on eight morphologically different European populations
FIGURE 1. Sampling map of Eurytemora carolleeae sp. nov. in North America (A) and Eurytemora affinis (Poppe, 1880) in Europe (B).
FIGURE 5 in A new species within the Eurytemora affinis complex (Copepoda: Calanoida) from the Atlantic Coast of USA, with observations on eight morphologically different European populations
FIGURE 5. Eurytemora carolleeae sp. nov., female, ZIN 55050 (holotype): A, left swimming leg 1, anterior view; B, swimming legs 2, anterior view; C, swimming legs 3, anterior view; D, swimming leg 4, anterior view. Scale bar: 100 µm. Arrow indicating seta segmentation.
FIGURE 8 in A new species within the Eurytemora affinis complex (Copepoda: Calanoida) from the Atlantic Coast of USA, with observations on eight morphologically different European populations
FIGURE 8. Eurytemora carolleeae sp. nov. (A) and E. affinis (Poppe, 1880) (B) from the Luga Bay, The Finish Gulf, Baltic Sea. (Photo: Mrs Natalia Sukhikh)
FIGURE 4 in A new species within the Eurytemora affinis complex (Copepoda: Calanoida) from the Atlantic Coast of USA, with observations on eight morphologically different European populations
FIGURE 4. Eurytemora carolleeae sp. nov., female, ZIN 55050 (holotype): A, antenna; B, maxillula, ventral view; C, maxilla; D, maxilliped. Scale bar: 50 µm. Arrow indicating seta segmentation.
Data from: Testing for beneficial reversal of dominance during salinity shifts in the invasive copepod Eurytemora affinis, and implications for the maintenance of genetic variation
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Suceptibility of non target crustacean Eurytemora affinis to endocrine disruptor tebufenozide: a transcriptomic approach
GEO Series GSE173927. Eurytemora affinis. 18 samples. Type: Expression profiling by high throughput sequencing.
Eurytemora affinis 2008 Experiments
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Sex-biased gene expression in the common copepod Eurytemora affinis
GEO Series GSE76680. Eurytemora affinis. 4 samples. Type: Expression profiling by high throughput sequencing.
The copepod Eurytemora affinis as a relevant species to assess estuarine sediment toxicity by combining sub-individual and individual endpoints: effects on gene expression and swimming behavior
GEO Series GSE235722. Eurytemora affinis. 15 samples. Type: Expression profiling by high throughput sequencing.
Decoupled responses of the copepod Eurytemora affinis transcriptome and its microbiota to dissolved copper exposure
GEO Series GSE212602. Eurytemora affinis. 12 samples. Type: Expression profiling by high throughput sequencing.
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