Extensive variation in the morphological anti-predator defense mechanism of Gammarus roeselii Gervais, 1835 (Crustacea:Amphipoda)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F20%3A10419403" target="_blank" >RIV/00216208:11310/20:10419403 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=SL.O-dkkV_" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=SL.O-dkkV_</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1086/707259" target="_blank" >10.1086/707259</a>
Alternative languages
Result language
angličtina
Original language name
Extensive variation in the morphological anti-predator defense mechanism of Gammarus roeselii Gervais, 1835 (Crustacea:Amphipoda)
Original language description
Gammarus roeselii is a common European amphipod, characterized by dorsal spines that defend against fish predation. Despite significant variability in spine length and number, the extent of this variation has never been quantified. Furthermore, widespread freshwater Gammarus taxa, including G. roeselii, are diverse species complexes, comprising numerous narrowly-endemic cryptic or overlooked species. As such, we hypothesized that the morphological variation among Central European populations of G. roeselii reflects the presence of multiple unrecognized species. We measured body and spine length from phenotypically-diverse populations and sequenced a fragment of the mitochondrial gene for the cytochrome c oxidase subunit I to link phenotypes and lineages. Morphological analyses revealed extensive variation and indicated 2 groups: morph A bearing 3 blunt, short spines and morph B with 3 to 4 long, pointy spines. Phylogenetic analyses indicated conspecificity of populations and morphs due to unexpectedly-small genetic divergence and haplotype sharing, thus refuting our hypothesis. All studied populations belong to a widespread Central and Western European clade, which is nestled among the Southeast European lineages of the species complex. We conclude that the anti-predator defense of G. roeselii in Central Europe is extremely variable despite little inter-population genetic differentiation. We presume that this variation is linked to predation intensity, reflecting either phenotypic plasticity or local adaptations of this successful colonizer, and could also shed more light into the complex evolution of spines in the Amphipoda.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10618 - Ecology
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Freshwater Sciences
ISSN
2161-9549
e-ISSN
2161-9565
Volume of the periodical
39
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
47-55
UT code for WoS article
000519541500005
EID of the result in the Scopus database
2-s2.0-85091984135