The conservation of migratory species poses significant challenges that may be countered by detailed knowledge about the sites used migrants throughout annual cycle. We present first GPS-tracking data on migration declining Caspian terns Hydroprogne caspia breeding in Baltic Sea. For 39 from colonies along a latitudinal gradient 57 to 65°N, we identified key routes, stopovers and wintering area...

in present study, the kinetic parameters of purified trypsin from pyloric caeca of common kilka (c.cultriventris caspia) were measured using the amidolytic (bapna) and esterolytic (tame) substrates. the results of the kinetic comparison between bapna and tame substrates showed that kinetic parameters including maximum velocity (vmax), catalytic constant (kcat) and catalytic efficiency (kcat/km)...

Research objective was to identify the specific features of distribution microelements (zink, manganese, lead, cadmium) in organs and tissues black-backed shad Alosa kessleri (Grimm, 1887) Dolginsky herring braschnikowii (Borodin, 1904) caught Caspian Sea. Accumulated fish concentrations exceeding maximum permissible limits, heavy metals pose a danger human health. Sampling carried out by stand...

Stable isotope analyses offer a useful means for quantifying ecological niche dimensions, though few studies have examined isotopic response of an community with respect to resource gradients such as fluctuations in prey availability. carbon and nitrogen isotopes were measured Lake Michigan salmonines their collected from 2014 2016. Bayesian ellipse mixing model used quantify characteristics di...