Reuschel, Silke and Schubart, Christoph D. (2007) Contrasting genetic diversity with phenotypic diversity in coloration and size in Xantho poressa (Brachyura : Xanthidae), with new results on its ecology. MARINE ECOLOGY-AN EVOLUTIONARY PERSPECTIVE, 28 (2). pp. 296-305. ISSN 0173-9565,
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The ecology of Xantho poressa (Olivi, 1792) (Brachyura) was studied during field trips to the Mediterranean Sea, the Black Sea and the Spanish Atlantic Ocean. Our results reveal that X. poressa lives from the intertidal to the shallow subtidal zone, and inhabits relatively protected rocky shores, often with pebble underground, from juvenile to adult stages. A mark-recapture experiment revealed a high population density in this habitat. All stages, but predominantly juveniles, show a variability of colour patterns, which allow the crabs to blend in, with the rocky substratum, thereby hiding from predators as passive defence. Adulthood can be reached with a carapace length smaller than 6 mm. The morphometric analysis of the species revealed allometric growth in carapace shape. Variability in overall size could be observed at different collecting sites. Neither the colour morphs nor the size differences could be attributed to differences of Cytochrome Oxidase subunit I mitochondrial DNA sequences, suggesting that ecological rather than genetic patterns are responsible for the different phenotypes.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | POLYMORPHISM; DECAPODA; PLASTICITY; PHYLOGENY; CRUSTACEA; VARUNIDAE; PATTERNS; CRAB; COI network; colour morphs; crustacea; Decapoda; phylogeography; polymorphism |
| Subjects: | 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie > Zoologie/Evolutionsbiologie (Prof. Dr. Jürgen Heinze) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Dec 2020 16:00 |
| Last Modified: | 08 Dec 2020 16:00 |
| URI: | https://pred.uni-regensburg.de/id/eprint/32698 |
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