Allozyme differentiation in the cuttlefish Sepia officinalis (Mollusca: Cephalopoda) from the NE Atlantic and Mediterranean

Article Abstract:

Allozyme differentiation is discussed as seen in cuttlefish, Sepia officinalis (Mollusca: Cephalopoda), from the northeast Atlantic and Mediterranean. The area has been proposed as a new phylogeographical area, but more taxa should be studied before such a designation is made. Of the cuttlefish, 11 Iberian samples showed moderate genetic differentiation explainable based on genetic differentiation between Atlantic and Mediterranean samples. Significant clines in allele frequencies were seen for 5 of 6 polymorphic loci.

Spain, Mediterranean Sea, Natural history, Fishes, Variation (Biology), Biogeomorphology, North Atlantic Ocean, Cephalopoda, Cephalopods

---

Genetic differentiation of the bullhead Cottus gobio L. across watersheds in Central Europe: evidence for two taxa

Article Abstract:

Evidence for two taxa has been found in a study of genetic differentiation of the bullhead Cottus gobio L. across Central Europe watersheds. The study used starch gel eletrophoresis and morphological chareacters on 16 of the bullhead populations over three drainage systems finding 20 of 31 screened allozyme loci to be polymorphic. Genetic variation differed considerably among populations. Likely the taxa were first separated by Pliocene-Pleistocene change paleogeographical events.

Germany, Measurement, Biological diversity, Biodiversity, Danube River, Watersheds, Paleobiogeography, Morphology (Animals), Animal morphology, Rhine River, Fishes, Fresh-water, Freshwater fishes, Elbe River

---

Genetic differentiation of Baetis alpinus Pictet (Ephemeroptera: Baetidae) in fragmented alpine streams

Article Abstract:

Genetic differentiation of Baetis alpinus Pictet is discussed, relative to fragmented alpine streams. The genetic structure of 23 populations of the insects, mayflies, in the streams, some fragmented by lakes and/or reservoirs, was studied to found out whether or not lakes act as barriers to gene flow and to investigate the temporal resolution of allozyme markers

Switzerland, Geology, Stratigraphic, Stratigraphy, Habitat partitioning (Biology), Habitat partitioning (Ecology), Ice age, Lakes, Mountains, Glaciers, May-flies, Mayflies, Alpine regions

Similar abstracts:

• Abstracts: Characterization of six bacteriophages of Serratia liquefaciens CP6 isolated from the sugar beet phytosphere. Seasonal population dynamics and interactions of competing bacteriophages and their host in the rhizosphere
• Abstracts: Genetic differentiation of oak populations within Quercus robur/Quercus petraea complex in Central and Eastern Europe
• Abstracts: Phylogeography and divergence in the chloroplast genome of Western Australian sandalwood (Santalum spicatum). Genetic differentiation between mallee and tree forms in the Eucalyptus loxophleba complex
• Abstracts: Molecular and cytogenetic characterization of highly repeated DNA sequences in the vole Microtus cabrerae. A model of the evolution of the unusual sex chromosome system of Microtus oregoni

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.